//
// MBProgressHUD.m
// Version 1.1.0
// Created by Matej Bukovinski on 2.4.09.
//
#import "ZMBProgressHUD.h"
#import <tgmath.h>
#ifndef kCFCoreFoundationVersionNumber_iOS_7_0
#define kCFCoreFoundationVersionNumber_iOS_7_0 847.20
#endif
#ifndef kCFCoreFoundationVersionNumber_iOS_8_0
#define kCFCoreFoundationVersionNumber_iOS_8_0 1129.15
#endif
#define MBMainThreadAssert() NSAssert([NSThread isMainThread], @"ZMBProgressHUD needs to be accessed on the main thread.");
CGFloat const MBProgressMaxOffset = 1000000.f;
static const CGFloat MBDefaultPadding = 4.f;
static const CGFloat MBDefaultLabelFontSize = 16.f;
static const CGFloat MBDefaultDetailsLabelFontSize = 12.f;
@interface ZMBProgressHUD ()
@property (nonatomic, assign) BOOL useAnimation;
@property (nonatomic, assign, getter=hasFinished) BOOL finished;
@property (nonatomic, strong) UIView *indicator;
@property (nonatomic, strong) NSDate *showStarted;
@property (nonatomic, strong) NSArray *paddingConstraints;
@property (nonatomic, strong) NSArray *bezelConstraints;
@property (nonatomic, strong) UIView *topSpacer;
@property (nonatomic, strong) UIView *bottomSpacer;
@property (nonatomic, weak) NSTimer *graceTimer;
@property (nonatomic, weak) NSTimer *minShowTimer;
@property (nonatomic, weak) NSTimer *hideDelayTimer;
@property (nonatomic, weak) CADisplayLink *progressObjectDisplayLink;
@end
@interface ZMBProgressHUDRoundedButton : UIButton
@end
@implementation ZMBProgressHUD
#pragma mark - Class methods
+ (instancetype)showHUDAddedTo:(UIView *)view animated:(BOOL)animated {
ZMBProgressHUD *hud = [[self alloc] initWithView:view];
hud.removeFromSuperViewOnHide = YES;
[view addSubview:hud];
[hud showAnimated:animated];
return hud;
}
+ (BOOL)hideHUDForView:(UIView *)view animated:(BOOL)animated {
ZMBProgressHUD *hud = [self HUDForView:view];
if (hud != nil) {
hud.removeFromSuperViewOnHide = YES;
[hud hideAnimated:animated];
return YES;
}
return NO;
}
+ (ZMBProgressHUD *)HUDForView:(UIView *)view {
NSEnumerator *subviewsEnum = [view.subviews reverseObjectEnumerator];
for (UIView *subview in subviewsEnum) {
if ([subview isKindOfClass:self]) {
ZMBProgressHUD *hud = (ZMBProgressHUD *)subview;
if (hud.hasFinished == NO) {
return hud;
}
}
}
return nil;
}
#pragma mark - Lifecycle
- (void)commonInit {
// Set default values for properties
_animationType = ZMBProgressHUDAnimationFade;
_mode = ZMBProgressHUDModeIndeterminate;
_margin = 20.0f;
_defaultMotionEffectsEnabled = YES;
// Default color, depending on the current iOS version
BOOL isLegacy = kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iOS_7_0;
_contentColor = isLegacy ? [UIColor whiteColor] : [UIColor colorWithWhite:0.f alpha:0.7f];
// Transparent background
self.opaque = NO;
self.backgroundColor = [UIColor clearColor];
// Make it invisible for now
self.alpha = 0.0f;
self.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
self.layer.allowsGroupOpacity = NO;
[self setupViews];
[self updateIndicators];
[self registerForNotisuaations];
}
- (instancetype)initWithFrame:(CGRect)frame {
if ((self = [super initWithFrame:frame])) {
[self commonInit];
}
return self;
}
- (instancetype)initWithCoder:(NSCoder *)aDecoder {
if ((self = [super initWithCoder:aDecoder])) {
[self commonInit];
}
return self;
}
- (id)initWithView:(UIView *)view {
NSAssert(view, @"View must not be nil.");
return [self initWithFrame:view.bounds];
}
- (void)dealloc {
[self unregisterFromNotisuaations];
}
#pragma mark - Show & hide
- (void)showAnimated:(BOOL)animated {
MBMainThreadAssert();
[self.minShowTimer invalidate];
self.useAnimation = animated;
self.finished = NO;
// If the grace time is set, postpone the HUD display
if (self.graceTime > 0.0) {
NSTimer *timer = [NSTimer timerWithTimeInterval:self.graceTime target:self selector:@selector(handleGraceTimer:) userInfo:nil repeats:NO];
[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];
self.graceTimer = timer;
}
// ... otherwise show the HUD immediately
else {
[self showUsingAnimation:self.useAnimation];
}
}
- (void)hideAnimated:(BOOL)animated {
MBMainThreadAssert();
[self.graceTimer invalidate];
self.useAnimation = animated;
self.finished = YES;
// If the minShow time is set, calculate how long the HUD was shown,
// and postpone the hiding operation if necessary
if (self.minShowTime > 0.0 && self.showStarted) {
NSTimeInterval interv = [[NSDate date] timeIntervalSinceDate:self.showStarted];
if (interv < self.minShowTime) {
NSTimer *timer = [NSTimer timerWithTimeInterval:(self.minShowTime - interv) target:self selector:@selector(handleMinShowTimer:) userInfo:nil repeats:NO];
[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];
self.minShowTimer = timer;
return;
}
}
// ... otherwise hide the HUD immediately
[self hideUsingAnimation:self.useAnimation];
}
- (void)hideAnimated:(BOOL)animated afterDelay:(NSTimeInterval)delay {
// Cancel any scheduled hideAnimated:afterDelay: calls
[self.hideDelayTimer invalidate];
NSTimer *timer = [NSTimer timerWithTimeInterval:delay target:self selector:@selector(handleHideTimer:) userInfo:@(animated) repeats:NO];
[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];
self.hideDelayTimer = timer;
}
#pragma mark - Timer callbacks
- (void)handleGraceTimer:(NSTimer *)theTimer {
// Show the HUD only if the task is still running
if (!self.hasFinished) {
[self showUsingAnimation:self.useAnimation];
}
}
- (void)handleMinShowTimer:(NSTimer *)theTimer {
[self hideUsingAnimation:self.useAnimation];
}
- (void)handleHideTimer:(NSTimer *)timer {
[self hideAnimated:[timer.userInfo boolValue]];
}
#pragma mark - View Hierrarchy
- (void)didMoveToSuperview {
[self updateForCurrentOrientationAnimated:NO];
}
#pragma mark - Internal show & hide operations
- (void)showUsingAnimation:(BOOL)animated {
// Cancel any previous animations
[self.bezelView.layer removeAllAnimations];
[self.backgroundView.layer removeAllAnimations];
// Cancel any scheduled hideAnimated:afterDelay: calls
[self.hideDelayTimer invalidate];
self.showStarted = [NSDate date];
self.alpha = 1.f;
// Needed in case we hide and re-show with the same NSProgress object attached.
[self setNSProgressDisplayLinkEnabled:YES];
if (animated) {
[self animateIn:YES withType:self.animationType completion:NULL];
} else {
self.bezelView.alpha = 1.f;
self.backgroundView.alpha = 1.f;
}
}
- (void)hideUsingAnimation:(BOOL)animated {
// Cancel any scheduled hideAnimated:afterDelay: calls.
// This needs to happen here instead of in done,
// to avoid races if another hideAnimated:afterDelay:
// call comes in while the HUD is animating out.
[self.hideDelayTimer invalidate];
if (animated && self.showStarted) {
self.showStarted = nil;
[self animateIn:NO withType:self.animationType completion:^(BOOL finished) {
[self done];
}];
} else {
self.showStarted = nil;
self.bezelView.alpha = 0.f;
self.backgroundView.alpha = 1.f;
[self done];
}
}
- (void)animateIn:(BOOL)animatingIn withType:(ZMBProgressHUDAnimation)type completion:(void(^)(BOOL finished))completion {
// Automatically determine the correct zoom animation type
if (type == ZMBProgressHUDAnimationZoom) {
type = animatingIn ? ZMBProgressHUDAnimationZoomIn : ZMBProgressHUDAnimationZoomOut;
}
CGAffineTransform small = CGAffineTransformMakeScale(0.5f, 0.5f);
CGAffineTransform large = CGAffineTransformMakeScale(1.5f, 1.5f);
// Set starting state
UIView *bezelView = self.bezelView;
if (animatingIn && bezelView.alpha == 0.f && type == ZMBProgressHUDAnimationZoomIn) {
bezelView.transform = small;
} else if (animatingIn && bezelView.alpha == 0.f && type == ZMBProgressHUDAnimationZoomOut) {
bezelView.transform = large;
}
// Perform animations
dispatch_block_t animations = ^{
if (animatingIn) {
bezelView.transform = CGAffineTransformIdentity;
} else if (!animatingIn && type == ZMBProgressHUDAnimationZoomIn) {
bezelView.transform = large;
} else if (!animatingIn && type == ZMBProgressHUDAnimationZoomOut) {
bezelView.transform = small;
}
CGFloat alpha = animatingIn ? 1.f : 0.f;
bezelView.alpha = alpha;
self.backgroundView.alpha = alpha;
};
// Spring animations are nicer, but only available on iOS 7+
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 70000 || TARGET_OS_TV
if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_7_0) {
[UIView animateWithDuration:0.3 delay:0. usingSpringWithDamping:1.f initialSpringVelocity:0.f options:UIViewAnimationOptionBeginFromCurrentState animations:animations completion:completion];
return;
}
#endif
[UIView animateWithDuration:0.3 delay:0. options:UIViewAnimationOptionBeginFromCurrentState animations:animations completion:completion];
}
- (void)done {
[self setNSProgressDisplayLinkEnabled:NO];
if (self.hasFinished) {
self.alpha = 0.0f;
if (self.removeFromSuperViewOnHide) {
[self removeFromSuperview];
}
}
MBProgressHUDCompletionBlock completionBlock = self.completionBlock;
if (completionBlock) {
completionBlock();
}
id<ZMBProgressHUDDelegate> delegate = self.delegate;
if ([delegate respondsToSelector:@selector(hudWasHidden:)]) {
[delegate performSelector:@selector(hudWasHidden:) withObject:self];
}
}
#pragma mark - UI
- (void)setupViews {
UIColor *defaultColor = self.contentColor;
MBBackgroundView *backgroundView = [[MBBackgroundView alloc] initWithFrame:self.bounds];
backgroundView.style = ZMBProgressHUDBackgroundStyleSolidColor;
backgroundView.backgroundColor = [UIColor clearColor];
backgroundView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
backgroundView.alpha = 0.f;
[self addSubview:backgroundView];
_backgroundView = backgroundView;
MBBackgroundView *bezelView = [MBBackgroundView new];
bezelView.translatesAutoresizingMaskIntoConstraints = NO;
bezelView.layer.cornerRadius = 5.f;
bezelView.alpha = 0.f;
[self addSubview:bezelView];
_bezelView = bezelView;
[self updateBezelMotionEffects];
UILabel *label = [UILabel new];
label.adjustsFontSizeToFitWidth = NO;
label.textAlignment = NSTextAlignmentCenter;
label.textColor = defaultColor;
label.font = [UIFont boldSystemFontOfSize:MBDefaultLabelFontSize];
label.opaque = NO;
label.backgroundColor = [UIColor clearColor];
_label = label;
UILabel *detailsLabel = [UILabel new];
detailsLabel.adjustsFontSizeToFitWidth = NO;
detailsLabel.textAlignment = NSTextAlignmentCenter;
detailsLabel.textColor = defaultColor;
detailsLabel.numberOfLines = 0;
detailsLabel.font = [UIFont boldSystemFontOfSize:MBDefaultDetailsLabelFontSize];
detailsLabel.opaque = NO;
detailsLabel.backgroundColor = [UIColor clearColor];
_detailsLabel = detailsLabel;
UIButton *button = [ZMBProgressHUDRoundedButton buttonWithType:UIButtonTypeCustom];
button.titleLabel.textAlignment = NSTextAlignmentCenter;
button.titleLabel.font = [UIFont boldSystemFontOfSize:MBDefaultDetailsLabelFontSize];
[button setTitleColor:defaultColor forState:UIControlStateNormal];
_button = button;
for (UIView *view in @[label, detailsLabel, button]) {
view.translatesAutoresizingMaskIntoConstraints = NO;
[view setContentCompressionResistancePriority:998.f forAxis:UILayoutConstraintAxisHorizontal];
[view setContentCompressionResistancePriority:998.f forAxis:UILayoutConstraintAxisVertical];
[bezelView addSubview:view];
}
UIView *topSpacer = [UIView new];
topSpacer.translatesAutoresizingMaskIntoConstraints = NO;
topSpacer.hidden = YES;
[bezelView addSubview:topSpacer];
_topSpacer = topSpacer;
UIView *bottomSpacer = [UIView new];
bottomSpacer.translatesAutoresizingMaskIntoConstraints = NO;
bottomSpacer.hidden = YES;
[bezelView addSubview:bottomSpacer];
_bottomSpacer = bottomSpacer;
}
- (void)updateIndicators {
UIView *indicator = self.indicator;
BOOL isActivityIndicator = [indicator isKindOfClass:[UIActivityIndicatorView class]];
BOOL isRoundIndicator = [indicator isKindOfClass:[ZMBRoundProgressView class]];
ZMBProgressHUDMode mode = self.mode;
if (mode == ZMBProgressHUDModeIndeterminate) {
if (!isActivityIndicator) {
// Update to indeterminate indicator
[indicator removeFromSuperview];
indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
[(UIActivityIndicatorView *)indicator startAnimating];
[self.bezelView addSubview:indicator];
}
}
else if (mode == ZMBProgressHUDModeDeterminateHorizontalBar) {
// Update to bar determinate indicator
[indicator removeFromSuperview];
indicator = [[ZMBBarProgressView alloc] init];
[self.bezelView addSubview:indicator];
}
else if (mode == ZMBProgressHUDModeDeterminate || mode == ZMBProgressHUDModeAnnularDeterminate) {
if (!isRoundIndicator) {
// Update to determinante indicator
[indicator removeFromSuperview];
indicator = [[ZMBRoundProgressView alloc] init];
[self.bezelView addSubview:indicator];
}
if (mode == ZMBProgressHUDModeAnnularDeterminate) {
[(ZMBRoundProgressView *)indicator setAnnular:YES];
}
}
else if (mode == ZMBProgressHUDModeCustomView && self.customView != indicator) {
// Update custom view indicator
[indicator removeFromSuperview];
indicator = self.customView;
[self.bezelView addSubview:indicator];
}
else if (mode == ZMBProgressHUDModeText) {
[indicator removeFromSuperview];
indicator = nil;
}
indicator.translatesAutoresizingMaskIntoConstraints = NO;
self.indicator = indicator;
if ([indicator respondsToSelector:@selector(setProgress:)]) {
[(id)indicator setValue:@(self.progress) forKey:@"progress"];
}
[indicator setContentCompressionResistancePriority:998.f forAxis:UILayoutConstraintAxisHorizontal];
[indicator setContentCompressionResistancePriority:998.f forAxis:UILayoutConstraintAxisVertical];
[self updateViewsForColor:self.contentColor];
[self setNeedsUpdateConstraints];
}
- (void)updateViewsForColor:(UIColor *)color {
if (!color) return;
self.label.textColor = color;
self.detailsLabel.textColor = color;
[self.button setTitleColor:color forState:UIControlStateNormal];
// UIAppearance settings are prioritized. If they are preset the set color is ignored.
UIView *indicator = self.indicator;
if ([indicator isKindOfClass:[UIActivityIndicatorView class]]) {
UIActivityIndicatorView *appearance = nil;
#if __IPHONE_OS_VERSION_MIN_REQUIRED < 90000
appearance = [UIActivityIndicatorView appearanceWhenContainedIn:[ZMBProgressHUD class], nil];
#else
// For iOS 9+
appearance = [UIActivityIndicatorView appearanceWhenContainedInInstancesOfClasses:@[[ZMBProgressHUD class]]];
#endif
if (appearance.color == nil) {
((UIActivityIndicatorView *)indicator).color = color;
}
} else if ([indicator isKindOfClass:[ZMBRoundProgressView class]]) {
ZMBRoundProgressView *appearance = nil;
#if __IPHONE_OS_VERSION_MIN_REQUIRED < 90000
appearance = [ZMBRoundProgressView appearanceWhenContainedIn:[ZMBProgressHUD class], nil];
#else
appearance = [ZMBRoundProgressView appearanceWhenContainedInInstancesOfClasses:@[[ZMBProgressHUD class]]];
#endif
if (appearance.progressTintColor == nil) {
((ZMBRoundProgressView *)indicator).progressTintColor = color;
}
if (appearance.backgroundTintColor == nil) {
((ZMBRoundProgressView *)indicator).backgroundTintColor = [color colorWithAlphaComponent:0.1];
}
} else if ([indicator isKindOfClass:[ZMBBarProgressView class]]) {
ZMBBarProgressView *appearance = nil;
#if __IPHONE_OS_VERSION_MIN_REQUIRED < 90000
appearance = [ZMBBarProgressView appearanceWhenContainedIn:[ZMBProgressHUD class], nil];
#else
appearance = [ZMBBarProgressView appearanceWhenContainedInInstancesOfClasses:@[[ZMBProgressHUD class]]];
#endif
if (appearance.progressColor == nil) {
((ZMBBarProgressView *)indicator).progressColor = color;
}
if (appearance.lineColor == nil) {
((ZMBBarProgressView *)indicator).lineColor = color;
}
} else {
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 70000 || TARGET_OS_TV
if ([indicator respondsToSelector:@selector(setTintColor:)]) {
[indicator setTintColor:color];
}
#endif
}
}
- (void)updateBezelMotionEffects {
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 70000 || TARGET_OS_TV
MBBackgroundView *bezelView = self.bezelView;
if (![bezelView respondsToSelector:@selector(addMotionEffect:)]) return;
if (self.defaultMotionEffectsEnabled) {
CGFloat effectOffset = 10.f;
UIInterpolatingMotionEffect *effectX = [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.x" type:UIInterpolatingMotionEffectTypeTiltAlongHorizontalAxis];
effectX.maximumRelativeValue = @(effectOffset);
effectX.minimumRelativeValue = @(-effectOffset);
UIInterpolatingMotionEffect *effectY = [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.y" type:UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis];
effectY.maximumRelativeValue = @(effectOffset);
effectY.minimumRelativeValue = @(-effectOffset);
UIMotionEffectGroup *group = [[UIMotionEffectGroup alloc] init];
group.motionEffects = @[effectX, effectY];
[bezelView addMotionEffect:group];
} else {
NSArray *effects = [bezelView motionEffects];
for (UIMotionEffect *effect in effects) {
[bezelView removeMotionEffect:effect];
}
}
#endif
}
#pragma mark - Layout
- (void)updateConstraints {
UIView *bezel = self.bezelView;
UIView *topSpacer = self.topSpacer;
UIView *bottomSpacer = self.bottomSpacer;
CGFloat margin = self.margin;
NSMutableArray *bezelConstraints = [NSMutableArray array];
NSDictionary *metrics = @{@"margin": @(margin)};
NSMutableArray *subviews = [NSMutableArray arrayWithObjects:self.topSpacer, self.label, self.detailsLabel, self.button, self.bottomSpacer, nil];
if (self.indicator) [subviews insertObject:self.indicator atIndex:1];
// Remove existing constraints
[self removeConstraints:self.constraints];
[topSpacer removeConstraints:topSpacer.constraints];
[bottomSpacer removeConstraints:bottomSpacer.constraints];
if (self.bezelConstraints) {
[bezel removeConstraints:self.bezelConstraints];
self.bezelConstraints = nil;
}
// Center bezel in container (self), applying the offset if set
CGPoint offset = self.offset;
NSMutableArray *centeringConstraints = [NSMutableArray array];
[centeringConstraints addObject:[NSLayoutConstraint constraintWithItem:bezel attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeCenterX multiplier:1.f constant:offset.x]];
[centeringConstraints addObject:[NSLayoutConstraint constraintWithItem:bezel attribute:NSLayoutAttributeCenterY relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeCenterY multiplier:1.f constant:offset.y]];
[self applyPriority:998.f toConstraints:centeringConstraints];
[self addConstraints:centeringConstraints];
// Ensure minimum side margin is kept
NSMutableArray *sideConstraints = [NSMutableArray array];
[sideConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"|-(>=margin)-[bezel]-(>=margin)-|" options:0 metrics:metrics views:NSDictionaryOfVariableBindings(bezel)]];
[sideConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-(>=margin)-[bezel]-(>=margin)-|" options:0 metrics:metrics views:NSDictionaryOfVariableBindings(bezel)]];
[self applyPriority:999.f toConstraints:sideConstraints];
[self addConstraints:sideConstraints];
// Minimum bezel size, if set
CGSize minimumSize = self.minSize;
if (!CGSizeEqualToSize(minimumSize, CGSizeZero)) {
NSMutableArray *minSizeConstraints = [NSMutableArray array];
[minSizeConstraints addObject:[NSLayoutConstraint constraintWithItem:bezel attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationGreaterThanOrEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.f constant:minimumSize.width]];
[minSizeConstraints addObject:[NSLayoutConstraint constraintWithItem:bezel attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationGreaterThanOrEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.f constant:minimumSize.height]];
[self applyPriority:997.f toConstraints:minSizeConstraints];
[bezelConstraints addObjectsFromArray:minSizeConstraints];
}
// Square aspect ratio, if set
if (self.square) {
NSLayoutConstraint *square = [NSLayoutConstraint constraintWithItem:bezel attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:bezel attribute:NSLayoutAttributeWidth multiplier:1.f constant:0];
square.priority = 997.f;
[bezelConstraints addObject:square];
}
// Top and bottom spacing
[topSpacer addConstraint:[NSLayoutConstraint constraintWithItem:topSpacer attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationGreaterThanOrEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.f constant:margin]];
[bottomSpacer addConstraint:[NSLayoutConstraint constraintWithItem:bottomSpacer attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationGreaterThanOrEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.f constant:margin]];
// Top and bottom spaces should be equal
[bezelConstraints addObject:[NSLayoutConstraint constraintWithItem:topSpacer attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:bottomSpacer attribute:NSLayoutAttributeHeight multiplier:1.f constant:0.f]];
// Layout subviews in bezel
NSMutableArray *paddingConstraints = [NSMutableArray new];
[subviews enumerateObjectsUsingBlock:^(UIView *view, NSUInteger idx, BOOL *stop) {
// Center in bezel
[bezelConstraints addObject:[NSLayoutConstraint constraintWithItem:view attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:bezel attribute:NSLayoutAttributeCenterX multiplier:1.f constant:0.f]];
// Ensure the minimum edge margin is kept
[bezelConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"|-(>=margin)-[view]-(>=margin)-|" options:0 metrics:metrics views:NSDictionaryOfVariableBindings(view)]];
// Element spacing
if (idx == 0) {
// First, ensure spacing to bezel edge
[bezelConstraints addObject:[NSLayoutConstraint constraintWithItem:view attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:bezel attribute:NSLayoutAttributeTop multiplier:1.f constant:0.f]];
} else if (idx == subviews.count - 1) {
// Last, ensure spacing to bezel edge
[bezelConstraints addObject:[NSLayoutConstraint constraintWithItem:view attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:bezel attribute:NSLayoutAttributeBottom multiplier:1.f constant:0.f]];
}
if (idx > 0) {
// Has previous
NSLayoutConstraint *padding = [NSLayoutConstraint constraintWithItem:view attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:subviews[idx - 1] attribute:NSLayoutAttributeBottom multiplier:1.f constant:0.f];
[bezelConstraints addObject:padding];
[paddingConstraints addObject:padding];
}
}];
[bezel addConstraints:bezelConstraints];
self.bezelConstraints = bezelConstraints;
self.paddingConstraints = [paddingConstraints copy];
[self updatePaddingConstraints];
[super updateConstraints];
}
- (void)layoutSubviews {
// There is no need to update constraints if they are going to
// be recreated in [super layoutSubviews] due to needsUpdateConstraints being set.
// This also avoids an issue on iOS 8, where updatePaddingConstraints
// would trigger a zombie object access.
if (!self.needsUpdateConstraints) {
[self updatePaddingConstraints];
}
[super layoutSubviews];
}
- (void)updatePaddingConstraints {
// Set padding dynamically, depending on whether the view is visible or not
__block BOOL hasVisibleAncestors = NO;
[self.paddingConstraints enumerateObjectsUsingBlock:^(NSLayoutConstraint *padding, NSUInteger idx, BOOL *stop) {
UIView *firstView = (UIView *)padding.firstItem;
UIView *secondView = (UIView *)padding.secondItem;
BOOL firstVisible = !firstView.hidden && !CGSizeEqualToSize(firstView.intrinsicContentSize, CGSizeZero);
BOOL secondVisible = !secondView.hidden && !CGSizeEqualToSize(secondView.intrinsicContentSize, CGSizeZero);
// Set if both views are visible or if there's a visible view on top that doesn't have padding
// added relative to the current view yet
padding.constant = (firstVisible && (secondVisible || hasVisibleAncestors)) ? MBDefaultPadding : 0.f;
hasVisibleAncestors |= secondVisible;
}];
}
- (void)applyPriority:(UILayoutPriority)priority toConstraints:(NSArray *)constraints {
for (NSLayoutConstraint *constraint in constraints) {
constraint.priority = priority;
}
}
#pragma mark - Properties
- (void)setMode:(ZMBProgressHUDMode)mode {
if (mode != _mode) {
_mode = mode;
[self updateIndicators];
}
}
- (void)setCustomView:(UIView *)customView {
if (customView != _customView) {
_customView = customView;
if (self.mode == ZMBProgressHUDModeCustomView) {
[self updateIndicators];
}
}
}
- (void)setOffset:(CGPoint)offset {
if (!CGPointEqualToPoint(offset, _offset)) {
_offset = offset;
[self setNeedsUpdateConstraints];
}
}
- (void)setMargin:(CGFloat)margin {
if (margin != _margin) {
_margin = margin;
[self setNeedsUpdateConstraints];
}
}
- (void)setMinSize:(CGSize)minSize {
if (!CGSizeEqualToSize(minSize, _minSize)) {
_minSize = minSize;
[self setNeedsUpdateConstraints];
}
}
- (void)setSquare:(BOOL)square {
if (square != _square) {
_square = square;
[self setNeedsUpdateConstraints];
}
}
- (void)setProgressObjectDisplayLink:(CADisplayLink *)progressObjectDisplayLink {
if (progressObjectDisplayLink != _progressObjectDisplayLink) {
[_progressObjectDisplayLink invalidate];
_progressObjectDisplayLink = progressObjectDisplayLink;
[_progressObjectDisplayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
}
}
- (void)setProgressObject:(NSProgress *)progressObject {
if (progressObject != _progressObject) {
_progressObject = progressObject;
[self setNSProgressDisplayLinkEnabled:YES];
}
}
- (void)setProgress:(float)progress {
if (progress != _progress) {
_progress = progress;
UIView *indicator = self.indicator;
if ([indicator respondsToSelector:@selector(setProgress:)]) {
[(id)indicator setValue:@(self.progress) forKey:@"progress"];
}
}
}
- (void)setContentColor:(UIColor *)contentColor {
if (contentColor != _contentColor && ![contentColor isEqual:_contentColor]) {
_contentColor = contentColor;
[self updateViewsForColor:contentColor];
}
}
- (void)setDefaultMotionEffectsEnabled:(BOOL)defaultMotionEffectsEnabled {
if (defaultMotionEffectsEnabled != _defaultMotionEffectsEnabled) {
_defaultMotionEffectsEnabled = defaultMotionEffectsEnabled;
[self updateBezelMotionEffects];
}
}
#pragma mark - NSProgress
- (void)setNSProgressDisplayLinkEnabled:(BOOL)enabled {
// We're using CADisplayLink, because NSProgress can change very quickly and observing it may starve the main thread,
// so we're refreshing the progress only every frame draw
if (enabled && self.progressObject) {
// Only create if not already active.
if (!self.progressObjectDisplayLink) {
self.progressObjectDisplayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(updateProgressFromProgressObject)];
}
} else {
self.progressObjectDisplayLink = nil;
}
}
- (void)updateProgressFromProgressObject {
self.progress = self.progressObject.fractionCompleted;
}
#pragma mark - Notisuaations
- (void)registerForNotisuaations {
#if !TARGET_OS_TV
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:@selector(statusBarOrientationDidChange:)
name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];
#endif
}
- (void)unregisterFromNotisuaations {
#if !TARGET_OS_TV
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc removeObserver:self name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];
#endif
}
#if !TARGET_OS_TV
- (void)statusBarOrientationDidChange:(NSNotification *)notisuaation {
UIView *superview = self.superview;
if (!superview) {
return;
} else {
[self updateForCurrentOrientationAnimated:YES];
}
}
#endif
- (void)updateForCurrentOrientationAnimated:(BOOL)animated {
// Stay in sync with the superview in any case
if (self.superview) {
self.frame = self.superview.bounds;
}
// Not needed on iOS 8+, compile out when the deployment target allows,
// to avoid sharedApplication problems on extension targets
#if __IPHONE_OS_VERSION_MIN_REQUIRED < 80000
// Only needed pre iOS 8 when added to a window
BOOL iOS8OrLater = kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_8_0;
if (iOS8OrLater || ![self.superview isKindOfClass:[UIWindow class]]) return;
// Make extension friendly. Will not get called on extensions (iOS 8+) due to the above check.
// This just ensures we don't get a warning about extension-unsafe API.
Class UIApplicationClass = NSClassFromString(@"UIApplication");
if (!UIApplicationClass || ![UIApplicationClass respondsToSelector:@selector(sharedApplication)]) return;
UIApplication *application = [UIApplication performSelector:@selector(sharedApplication)];
UIInterfaceOrientation orientation = application.statusBarOrientation;
CGFloat radians = 0;
if (UIInterfaceOrientationIsLandscape(orientation)) {
radians = orientation == UIInterfaceOrientationLandscapeLeft ? -(CGFloat)M_PI_2 : (CGFloat)M_PI_2;
// Window coordinates differ!
self.bounds = CGRectMake(0, 0, self.bounds.size.height, self.bounds.size.width);
} else {
radians = orientation == UIInterfaceOrientationPortraitUpsideDown ? (CGFloat)M_PI : 0.f;
}
if (animated) {
[UIView animateWithDuration:0.3 animations:^{
self.transform = CGAffineTransformMakeRotation(radians);
}];
} else {
self.transform = CGAffineTransformMakeRotation(radians);
}
#endif
}
@end
@implementation ZMBRoundProgressView
#pragma mark - Lifecycle
- (id)init {
return [self initWithFrame:CGRectMake(0.f, 0.f, 37.f, 37.f)];
}
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
self.backgroundColor = [UIColor clearColor];
self.opaque = NO;
_progress = 0.f;
_annular = NO;
_progressTintColor = [[UIColor alloc] initWithWhite:1.f alpha:1.f];
_backgroundTintColor = [[UIColor alloc] initWithWhite:1.f alpha:.1f];
}
return self;
}
#pragma mark - Layout
- (CGSize)intrinsicContentSize {
return CGSizeMake(37.f, 37.f);
}
#pragma mark - Properties
- (void)setProgress:(float)progress {
if (progress != _progress) {
_progress = progress;
[self setNeedsDisplay];
}
}
- (void)setProgressTintColor:(UIColor *)progressTintColor {
NSAssert(progressTintColor, @"The color should not be nil.");
if (progressTintColor != _progressTintColor && ![progressTintColor isEqual:_progressTintColor]) {
_progressTintColor = progressTintColor;
[self setNeedsDisplay];
}
}
- (void)setBackgroundTintColor:(UIColor *)backgroundTintColor {
NSAssert(backgroundTintColor, @"The color should not be nil.");
if (backgroundTintColor != _backgroundTintColor && ![backgroundTintColor isEqual:_backgroundTintColor]) {
_backgroundTintColor = backgroundTintColor;
[self setNeedsDisplay];
}
}
#pragma mark - Drawing
- (void)drawRect:(CGRect)rect {
CGContextRef context = UIGraphicsGetCurrentContext();
BOOL isPreiOS7 = kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iOS_7_0;
if (_annular) {
// Draw background
CGFloat lineWidth = isPreiOS7 ? 5.f : 2.f;
UIBezierPath *processBackgroundPath = [UIBezierPath bezierPath];
processBackgroundPath.lineWidth = lineWidth;
processBackgroundPath.lineCapStyle = kCGLineCapButt;
CGPoint center = CGPointMake(CGRectGetMidX(self.bounds), CGRectGetMidY(self.bounds));
CGFloat radius = (self.bounds.size.width - lineWidth)/2;
CGFloat startAngle = - ((float)M_PI / 2); // 90 degrees
CGFloat endAngle = (2 * (float)M_PI) + startAngle;
[processBackgroundPath addArcWithCenter:center radius:radius startAngle:startAngle endAngle:endAngle clockwise:YES];
[_backgroundTintColor set];
[processBackgroundPath stroke];
// Draw progress
UIBezierPath *processPath = [UIBezierPath bezierPath];
processPath.lineCapStyle = isPreiOS7 ? kCGLineCapRound : kCGLineCapSquare;
processPath.lineWidth = lineWidth;
endAngle = (self.progress * 2 * (float)M_PI) + startAngle;
[processPath addArcWithCenter:center radius:radius startAngle:startAngle endAngle:endAngle clockwise:YES];
[_progressTintColor set];
[processPath stroke];
} else {
// Draw background
CGFloat lineWidth = 2.f;
CGRect allRect = self.bounds;
CGRect circleRect = CGRectInset(allRect, lineWidth/2.f, lineWidth/2.f);
CGPoint center = CGPointMake(CGRectGetMidX(self.bounds), CGRectGetMidY(self.bounds));
[_progressTintColor setStroke];
[_backgroundTintColor setFill];
CGContextSetLineWidth(context, lineWidth);
if (isPreiOS7) {
CGContextFillEllipseInRect(context, circleRect);
}
CGContextStrokeEllipseInRect(context, circleRect);
// 90 degrees
CGFloat startAngle = - ((float)M_PI / 2.f);
// Draw progress
if (isPreiOS7) {
CGFloat radius = (CGRectGetWidth(self.bounds) / 2.f) - lineWidth;
CGFloat endAngle = (self.progress * 2.f * (float)M_PI) + startAngle;
[_progressTintColor setFill];
CGContextMoveToPoint(context, center.x, center.y);
CGContextAddArc(context, center.x, center.y, radius, startAngle, endAngle, 0);
CGContextClosePath(context);
CGContextFillPath(context);
} else {
UIBezierPath *processPath = [UIBezierPath bezierPath];
processPath.lineCapStyle = kCGLineCapButt;
processPath.lineWidth = lineWidth * 2.f;
CGFloat radius = (CGRectGetWidth(self.bounds) / 2.f) - (processPath.lineWidth / 2.f);
CGFloat endAngle = (self.progress * 2.f * (float)M_PI) + startAngle;
[processPath addArcWithCenter:center radius:radius startAngle:startAngle endAngle:endAngle clockwise:YES];
// Ensure that we don't get color overlapping when _progressTintColor alpha < 1.f.
CGContextSetBlendMode(context, kCGBlendModeCopy);
[_progressTintColor set];
[processPath stroke];
}
}
}
@end
@implementation ZMBBarProgressView
#pragma mark - Lifecycle
- (id)init {
return [self initWithFrame:CGRectMake(.0f, .0f, 120.0f, 20.0f)];
}
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
_progress = 0.f;
_lineColor = [UIColor whiteColor];
_progressColor = [UIColor whiteColor];
_progressRemainingColor = [UIColor clearColor];
self.backgroundColor = [UIColor clearColor];
self.opaque = NO;
}
return self;
}
#pragma mark - Layout
- (CGSize)intrinsicContentSize {
BOOL isPreiOS7 = kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iOS_7_0;
return CGSizeMake(120.f, isPreiOS7 ? 20.f : 10.f);
}
#pragma mark - Properties
- (void)setProgress:(float)progress {
if (progress != _progress) {
_progress = progress;
[self setNeedsDisplay];
}
}
- (void)setProgressColor:(UIColor *)progressColor {
NSAssert(progressColor, @"The color should not be nil.");
if (progressColor != _progressColor && ![progressColor isEqual:_progressColor]) {
_progressColor = progressColor;
[self setNeedsDisplay];
}
}
- (void)setProgressRemainingColor:(UIColor *)progressRemainingColor {
NSAssert(progressRemainingColor, @"The color should not be nil.");
if (progressRemainingColor != _progressRemainingColor && ![progressRemainingColor isEqual:_progressRemainingColor]) {
_progressRemainingColor = progressRemainingColor;
[self setNeedsDisplay];
}
}
#pragma mark - Drawing
- (void)drawRect:(CGRect)rect {
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(context, 2);
CGContextSetStrokeColorWithColor(context,[_lineColor CGColor]);
CGContextSetFillColorWithColor(context, [_progressRemainingColor CGColor]);
// Draw background and Border
CGFloat radius = (rect.size.height / 2) - 2;
CGContextMoveToPoint(context, 2, rect.size.height/2);
CGContextAddArcToPoint(context, 2, 2, radius + 2, 2, radius);
CGContextAddArcToPoint(context, rect.size.width - 2, 2, rect.size.width - 2, rect.size.height / 2, radius);
CGContextAddArcToPoint(context, rect.size.width - 2, rect.size.height - 2, rect.size.width - radius - 2, rect.size.height - 2, radius);
CGContextAddArcToPoint(context, 2, rect.size.height - 2, 2, rect.size.height/2, radius);
CGContextDrawPath(context, kCGPathFillStroke);
CGContextSetFillColorWithColor(context, [_progressColor CGColor]);
radius = radius - 2;
CGFloat amount = self.progress * rect.size.width;
// Progress in the middle area
if (amount >= radius + 4 && amount <= (rect.size.width - radius - 4)) {
CGContextMoveToPoint(context, 4, rect.size.height/2);
CGContextAddArcToPoint(context, 4, 4, radius + 4, 4, radius);
CGContextAddLineToPoint(context, amount, 4);
CGContextAddLineToPoint(context, amount, radius + 4);
CGContextMoveToPoint(context, 4, rect.size.height/2);
CGContextAddArcToPoint(context, 4, rect.size.height - 4, radius + 4, rect.size.height - 4, radius);
CGContextAddLineToPoint(context, amount, rect.size.height - 4);
CGContextAddLineToPoint(context, amount, radius + 4);
CGContextFillPath(context);
}
// Progress in the right arc
else if (amount > radius + 4) {
CGFloat x = amount - (rect.size.width - radius - 4);
CGContextMoveToPoint(context, 4, rect.size.height/2);
CGContextAddArcToPoint(context, 4, 4, radius + 4, 4, radius);
CGContextAddLineToPoint(context, rect.size.width - radius - 4, 4);
CGFloat angle = -acos(x/radius);
if (isnan(angle)) angle = 0;
CGContextAddArc(context, rect.size.width - radius - 4, rect.size.height/2, radius, M_PI, angle, 0);
CGContextAddLineToPoint(context, amount, rect.size.height/2);
CGContextMoveToPoint(context, 4, rect.size.height/2);
CGContextAddArcToPoint(context, 4, rect.size.height - 4, radius + 4, rect.size.height - 4, radius);
CGContextAddLineToPoint(context, rect.size.width - radius - 4, rect.size.height - 4);
angle = acos(x/radius);
if (isnan(angle)) angle = 0;
CGContextAddArc(context, rect.size.width - radius - 4, rect.size.height/2, radius, -M_PI, angle, 1);
CGContextAddLineToPoint(context, amount, rect.size.height/2);
CGContextFillPath(context);
}
// Progress is in the left arc
else if (amount < radius + 4 && amount > 0) {
CGContextMoveToPoint(context, 4, rect.size.height/2);
CGContextAddArcToPoint(context, 4, 4, radius + 4, 4, radius);
CGContextAddLineToPoint(context, radius + 4, rect.size.height/2);
CGContextMoveToPoint(context, 4, rect.size.height/2);
CGContextAddArcToPoint(context, 4, rect.size.height - 4, radius + 4, rect.size.height - 4, radius);
CGContextAddLineToPoint(context, radius + 4, rect.size.height/2);
CGContextFillPath(context);
}
}
@end
@interface MBBackgroundView ()
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000 || TARGET_OS_TV
@property UIVisualEffectView *effectView;
#endif
#if !TARGET_OS_TV
@property UIToolbar *toolbar;
#endif
@end
@implementation MBBackgroundView
#pragma mark - Lifecycle
- (instancetype)initWithFrame:(CGRect)frame {
if ((self = [super initWithFrame:frame])) {
if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_7_0) {
_style = ZMBProgressHUDBackgroundStyleBlur;
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000 || TARGET_OS_TV
_blurEffectStyle = UIBlurEffectStyleLight;
#endif
if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_8_0) {
_color = [UIColor colorWithWhite:0.8f alpha:0.6f];
} else {
_color = [UIColor colorWithWhite:0.95f alpha:0.6f];
}
} else {
_style = ZMBProgressHUDBackgroundStyleSolidColor;
_color = [[UIColor blackColor] colorWithAlphaComponent:0.8];
}
self.clipsToBounds = YES;
[self updateForBackgroundStyle];
}
return self;
}
#pragma mark - Layout
- (CGSize)intrinsicContentSize {
// Smallest size possible. Content pushes against this.
return CGSizeZero;
}
#pragma mark - Appearance
- (void)setStyle:(ZMBProgressHUDBackgroundStyle)style {
if (style == ZMBProgressHUDBackgroundStyleBlur && kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iOS_7_0) {
style = ZMBProgressHUDBackgroundStyleSolidColor;
}
if (_style != style) {
_style = style;
[self updateForBackgroundStyle];
}
}
- (void)setColor:(UIColor *)color {
NSAssert(color, @"The color should not be nil.");
if (color != _color && ![color isEqual:_color]) {
_color = color;
[self updateViewsForColor:color];
}
}
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000 || TARGET_OS_TV
- (void)setBlurEffectStyle:(UIBlurEffectStyle)blurEffectStyle {
if (_blurEffectStyle == blurEffectStyle) {
return;
}
_blurEffectStyle = blurEffectStyle;
[self updateForBackgroundStyle];
}
#endif
///////////////////////////////////////////////////////////////////////////////////////////
#pragma mark - Views
- (void)updateForBackgroundStyle {
ZMBProgressHUDBackgroundStyle style = self.style;
if (style == ZMBProgressHUDBackgroundStyleBlur) {
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000 || TARGET_OS_TV
if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_8_0) {
UIBlurEffect *effect = [UIBlurEffect effectWithStyle:self.blurEffectStyle];
UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:effect];
[self addSubview:effectView];
effectView.frame = self.bounds;
effectView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
self.backgroundColor = self.color;
self.layer.allowsGroupOpacity = NO;
self.effectView = effectView;
} else {
#endif
#if !TARGET_OS_TV
UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectInset(self.bounds, -100.f, -100.f)];
toolbar.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
toolbar.barTintColor = self.color;
toolbar.translucent = YES;
[self addSubview:toolbar];
self.toolbar = toolbar;
#endif
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000 || TARGET_OS_TV
}
#endif
} else {
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000 || TARGET_OS_TV
if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_8_0) {
[self.effectView removeFromSuperview];
self.effectView = nil;
} else {
#endif
#if !TARGET_OS_TV
[self.toolbar removeFromSuperview];
self.toolbar = nil;
#endif
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000 || TARGET_OS_TV
}
#endif
self.backgroundColor = self.color;
}
}
- (void)updateViewsForColor:(UIColor *)color {
if (self.style == ZMBProgressHUDBackgroundStyleBlur) {
if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iOS_8_0) {
self.backgroundColor = self.color;
} else {
#if !TARGET_OS_TV
self.toolbar.barTintColor = color;
#endif
}
} else {
self.backgroundColor = self.color;
}
}
@end
@implementation ZMBProgressHUDRoundedButton
#pragma mark - Lifecycle
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
CALayer *layer = self.layer;
layer.borderWidth = 1.f;
}
return self;
}
#pragma mark - Layout
- (void)layoutSubviews {
[super layoutSubviews];
// Fully rounded corners
CGFloat height = CGRectGetHeight(self.bounds);
self.layer.cornerRadius = ceil(height / 2.f);
}
- (CGSize)intrinsicContentSize {
// Only show if we have associated control events
if (self.allControlEvents == 0) return CGSizeZero;
CGSize size = [super intrinsicContentSize];
// Add some side padding
size.width += 20.f;
return size;
}
#pragma mark - Color
- (void)setTitleColor:(UIColor *)color forState:(UIControlState)state {
[super setTitleColor:color forState:state];
// Update related colors
[self setHighlighted:self.highlighted];
self.layer.borderColor = color.CGColor;
}
- (void)setHighlighted:(BOOL)highlighted {
[super setHighlighted:highlighted];
UIColor *baseColor = [self titleColorForState:UIControlStateSelected];
self.backgroundColor = highlighted ? [baseColor colorWithAlphaComponent:0.1f] : [UIColor clearColor];
}
@end
