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MBProgressHUD.m
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MBProgressHUD.m
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//
// MBProgressHUD.m
// Version 1.2.0
// Created by Matej Bukovinski on 2.4.09.
//
#import "MBProgressHUD.h"
#import <tgmath.h>
#define MBMainThreadAssert() NSAssert([NSThread isMainThread], @"MBProgressHUD 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 MBProgressHUD ()
@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, strong) UIMotionEffectGroup *bezelMotionEffects;
@property (nonatomic, weak) NSTimer *graceTimer;
@property (nonatomic, weak) NSTimer *minShowTimer;
@property (nonatomic, weak) NSTimer *hideDelayTimer;
@property (nonatomic, weak) CADisplayLink *progressObjectDisplayLink;
@end
@interface MBProgressHUDRoundedButton : UIButton
@end
@implementation MBProgressHUD
#pragma mark - Class methods
+ (instancetype)showHUDAddedTo:(UIView *)view animated:(BOOL)animated {
return [self showHUDAddedTo:view animated:animated graceTime:0];
}
+ (instancetype)showHUDAddedTo:(UIView *)view animated:(BOOL)animated graceTime:(NSTimeInterval)graceTime {
MBProgressHUD *hud = [[self alloc] initWithView:view];
hud.graceTime = graceTime;
hud.removeFromSuperViewOnHide = YES;
[view addSubview:hud];
[hud showAnimated:animated];
return hud;
}
+ (BOOL)hideHUDForView:(UIView *)view animated:(BOOL)animated {
MBProgressHUD *hud = [self HUDForView:view];
if (hud != nil) {
hud.removeFromSuperViewOnHide = YES;
[hud hideAnimated:animated];
return YES;
}
return NO;
}
+ (MBProgressHUD *)HUDForView:(UIView *)view {
NSEnumerator *subviewsEnum = [view.subviews reverseObjectEnumerator];
for (UIView *subview in subviewsEnum) {
if ([subview isKindOfClass:self]) {
MBProgressHUD *hud = (MBProgressHUD *)subview;
if (hud.hasFinished == NO) {
return hud;
}
}
}
return nil;
}
#pragma mark - Lifecycle
- (void)commonInit {
// Set default values for properties
_animationType = MBProgressHUDAnimationFade;
_mode = MBProgressHUDModeIndeterminate;
_margin = 20.0f;
_defaultMotionEffectsEnabled = NO;
if (@available(iOS 13.0, tvOS 13, *)) {
_contentColor = [[UIColor labelColor] colorWithAlphaComponent:0.7f];
} else {
_contentColor = [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 registerForNotifications];
}
- (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 unregisterFromNotifications];
}
#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;
// 0.02 prevents the hud from passing through touches during the animation the hud will get completely hidden
// in the done method
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:self.graceTime - 0.01f];
self.alpha = 0.02f;
[UIView commitAnimations];
}
// ... 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];
// Set up motion effects only at this point to avoid needlessly
// creating the effect if it was disabled after initialization.
[self updateBezelMotionEffects];
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:(MBProgressHUDAnimation)type completion:(void(^)(BOOL finished))completion {
// Automatically determine the correct zoom animation type
if (type == MBProgressHUDAnimationZoom) {
type = animatingIn ? MBProgressHUDAnimationZoomIn : MBProgressHUDAnimationZoomOut;
}
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 == MBProgressHUDAnimationZoomIn) {
bezelView.transform = small;
} else if (animatingIn && bezelView.alpha == 0.f && type == MBProgressHUDAnimationZoomOut) {
bezelView.transform = large;
}
// Perform animations
dispatch_block_t animations = ^{
if (animatingIn) {
bezelView.transform = CGAffineTransformIdentity;
} else if (!animatingIn && type == MBProgressHUDAnimationZoomIn) {
bezelView.transform = large;
} else if (!animatingIn && type == MBProgressHUDAnimationZoomOut) {
bezelView.transform = small;
}
CGFloat alpha = animatingIn ? 1.f : 0.f;
bezelView.alpha = alpha;
self.backgroundView.alpha = alpha;
};
[UIView animateWithDuration:0.3 delay:0. usingSpringWithDamping:1.f initialSpringVelocity:0.f 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<MBProgressHUDDelegate> 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 = MBProgressHUDBackgroundStyleSolidColor;
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;
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 = [MBProgressHUDRoundedButton 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:[MBRoundProgressView class]];
MBProgressHUDMode mode = self.mode;
if (mode == MBProgressHUDModeIndeterminate) {
if (!isActivityIndicator) {
// Update to indeterminate indicator
UIActivityIndicatorView *activityIndicator;
[indicator removeFromSuperview];
#if !TARGET_OS_MACCATALYST
if (@available(iOS 13.0, tvOS 13.0, *)) {
#endif
activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleLarge];
activityIndicator.color = [UIColor whiteColor];
#if !TARGET_OS_MACCATALYST
} else {
activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
}
#endif
[activityIndicator startAnimating];
indicator = activityIndicator;
[self.bezelView addSubview:indicator];
}
}
else if (mode == MBProgressHUDModeDeterminateHorizontalBar) {
// Update to bar determinate indicator
[indicator removeFromSuperview];
indicator = [[MBBarProgressView alloc] init];
[self.bezelView addSubview:indicator];
}
else if (mode == MBProgressHUDModeDeterminate || mode == MBProgressHUDModeAnnularDeterminate) {
if (!isRoundIndicator) {
// Update to determinante indicator
[indicator removeFromSuperview];
indicator = [[MBRoundProgressView alloc] init];
[self.bezelView addSubview:indicator];
}
if (mode == MBProgressHUDModeAnnularDeterminate) {
[(MBRoundProgressView *)indicator setAnnular:YES];
}
}
else if (mode == MBProgressHUDModeCustomView && self.customView != indicator) {
// Update custom view indicator
[indicator removeFromSuperview];
indicator = self.customView;
[self.bezelView addSubview:indicator];
}
else if (mode == MBProgressHUDModeText) {
[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:[MBProgressHUD class], nil];
#else
// For iOS 9+
appearance = [UIActivityIndicatorView appearanceWhenContainedInInstancesOfClasses:@[[MBProgressHUD class]]];
#endif
if (appearance.color == nil) {
((UIActivityIndicatorView *)indicator).color = color;
}
} else if ([indicator isKindOfClass:[MBRoundProgressView class]]) {
MBRoundProgressView *appearance = nil;
#if __IPHONE_OS_VERSION_MIN_REQUIRED < 90000
appearance = [MBRoundProgressView appearanceWhenContainedIn:[MBProgressHUD class], nil];
#else
appearance = [MBRoundProgressView appearanceWhenContainedInInstancesOfClasses:@[[MBProgressHUD class]]];
#endif
if (appearance.progressTintColor == nil) {
((MBRoundProgressView *)indicator).progressTintColor = color;
}
if (appearance.backgroundTintColor == nil) {
((MBRoundProgressView *)indicator).backgroundTintColor = [color colorWithAlphaComponent:0.1];
}
} else if ([indicator isKindOfClass:[MBBarProgressView class]]) {
MBBarProgressView *appearance = nil;
#if __IPHONE_OS_VERSION_MIN_REQUIRED < 90000
appearance = [MBBarProgressView appearanceWhenContainedIn:[MBProgressHUD class], nil];
#else
appearance = [MBBarProgressView appearanceWhenContainedInInstancesOfClasses:@[[MBProgressHUD class]]];
#endif
if (appearance.progressColor == nil) {
((MBBarProgressView *)indicator).progressColor = color;
}
if (appearance.lineColor == nil) {
((MBBarProgressView *)indicator).lineColor = color;
}
} else {
[indicator setTintColor:color];
}
}
- (void)updateBezelMotionEffects {
MBBackgroundView *bezelView = self.bezelView;
UIMotionEffectGroup *bezelMotionEffects = self.bezelMotionEffects;
if (self.defaultMotionEffectsEnabled && !bezelMotionEffects) {
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];
self.bezelMotionEffects = group;
[bezelView addMotionEffect:group];
} else if (bezelMotionEffects) {
self.bezelMotionEffects = nil;
[bezelView removeMotionEffect:bezelMotionEffects];
}
}
#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:(MBProgressHUDMode)mode {
if (mode != _mode) {
_mode = mode;
[self updateIndicators];
}
}
- (void)setCustomView:(UIView *)customView {
if (customView != _customView) {
_customView = customView;
if (self.mode == MBProgressHUDModeCustomView) {
[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 - Notifications
- (void)registerForNotifications {
#if !TARGET_OS_TV && !TARGET_OS_MACCATALYST
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self selector:@selector(statusBarOrientationDidChange:)
name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];
#endif
}
- (void)unregisterFromNotifications {
#if !TARGET_OS_TV && !TARGET_OS_MACCATALYST
NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc removeObserver:self name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];
#endif
}
#if !TARGET_OS_TV && !TARGET_OS_MACCATALYST
- (void)statusBarOrientationDidChange:(NSNotification *)notification {
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 MBRoundProgressView
#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();
if (_annular) {
// Draw background
CGFloat lineWidth = 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 = 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);
CGContextStrokeEllipseInRect(context, circleRect);
// 90 degrees
CGFloat startAngle = - ((float)M_PI / 2.f);
// Draw progress
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 MBBarProgressView
#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 {
return CGSizeMake(120.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]);