UIView+WebCache.m
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/*
* This file is part of the SDWebImage package.
* (c) Olivier Poitrey <rs@dailymotion.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
#import "UIView+WebCache.h"
#import "objc/runtime.h"
#import "UIView+WebCacheOperation.h"
#import "SDWebImageError.h"
const int64_t SDWebImageProgressUnitCountUnknown = 1LL;
@implementation UIView (WebCache)
- (nullable NSURL *)sd_imageURL {
return objc_getAssociatedObject(self, @selector(sd_imageURL));
}
- (void)setSd_imageURL:(NSURL * _Nullable)sd_imageURL {
objc_setAssociatedObject(self, @selector(sd_imageURL), sd_imageURL, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (NSProgress *)sd_imageProgress {
NSProgress *progress = objc_getAssociatedObject(self, @selector(sd_imageProgress));
if (!progress) {
progress = [[NSProgress alloc] initWithParent:nil userInfo:nil];
self.sd_imageProgress = progress;
}
return progress;
}
- (void)setSd_imageProgress:(NSProgress *)sd_imageProgress {
objc_setAssociatedObject(self, @selector(sd_imageProgress), sd_imageProgress, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (void)sd_internalSetImageWithURL:(nullable NSURL *)url
placeholderImage:(nullable UIImage *)placeholder
options:(SDWebImageOptions)options
context:(nullable SDWebImageContext *)context
setImageBlock:(nullable SDSetImageBlock)setImageBlock
progress:(nullable SDImageLoaderProgressBlock)progressBlock
completed:(nullable SDInternalCompletionBlock)completedBlock {
context = [context copy]; // copy to avoid mutable object
NSString *validOperationKey = context[SDWebImageContextSetImageOperationKey];
if (!validOperationKey) {
validOperationKey = NSStringFromClass([self class]);
}
[self sd_cancelImageLoadOperationWithKey:validOperationKey];
self.sd_imageURL = url;
if (!(options & SDWebImageDelayPlaceholder)) {
dispatch_main_async_safe(^{
[self sd_setImage:placeholder imageData:nil basedOnClassOrViaCustomSetImageBlock:setImageBlock cacheType:SDImageCacheTypeNone imageURL:url];
});
}
if (url) {
// reset the progress
self.sd_imageProgress.totalUnitCount = 0;
self.sd_imageProgress.completedUnitCount = 0;
#if SD_UIKIT || SD_MAC
// check and start image indicator
[self sd_startImageIndicator];
id<SDWebImageIndicator> imageIndicator = self.sd_imageIndicator;
#endif
SDWebImageManager *manager = context[SDWebImageContextCustomManager];
if (!manager) {
manager = [SDWebImageManager sharedManager];
}
__weak __typeof(self)wself = self;
SDImageLoaderProgressBlock combinedProgressBlock = ^(NSInteger receivedSize, NSInteger expectedSize, NSURL * _Nullable targetURL) {
__strong __typeof (wself) sself = wself;
NSProgress *imageProgress = sself.sd_imageProgress;
imageProgress.totalUnitCount = expectedSize;
imageProgress.completedUnitCount = receivedSize;
#if SD_UIKIT || SD_MAC
if ([imageIndicator respondsToSelector:@selector(updateIndicatorProgress:)]) {
double progress = imageProgress.fractionCompleted;
dispatch_async(dispatch_get_main_queue(), ^{
[imageIndicator updateIndicatorProgress:progress];
});
}
#endif
if (progressBlock) {
progressBlock(receivedSize, expectedSize, targetURL);
}
};
id <SDWebImageOperation> operation = [manager loadImageWithURL:url options:options context:context progress:combinedProgressBlock completed:^(UIImage *image, NSData *data, NSError *error, SDImageCacheType cacheType, BOOL finished, NSURL *imageURL) {
__strong __typeof (wself) sself = wself;
if (!sself) { return; }
// if the progress not been updated, mark it to complete state
if (finished && !error && sself.sd_imageProgress.totalUnitCount == 0 && sself.sd_imageProgress.completedUnitCount == 0) {
sself.sd_imageProgress.totalUnitCount = SDWebImageProgressUnitCountUnknown;
sself.sd_imageProgress.completedUnitCount = SDWebImageProgressUnitCountUnknown;
}
#if SD_UIKIT || SD_MAC
// check and stop image indicator
if (finished) {
[self sd_stopImageIndicator];
}
#endif
BOOL shouldCallCompletedBlock = finished || (options & SDWebImageAvoidAutoSetImage);
BOOL shouldNotSetImage = ((image && (options & SDWebImageAvoidAutoSetImage)) ||
(!image && !(options & SDWebImageDelayPlaceholder)));
SDWebImageNoParamsBlock callCompletedBlockClojure = ^{
if (!sself) { return; }
if (!shouldNotSetImage) {
[sself sd_setNeedsLayout];
}
if (completedBlock && shouldCallCompletedBlock) {
completedBlock(image, data, error, cacheType, finished, url);
}
};
// case 1a: we got an image, but the SDWebImageAvoidAutoSetImage flag is set
// OR
// case 1b: we got no image and the SDWebImageDelayPlaceholder is not set
if (shouldNotSetImage) {
dispatch_main_async_safe(callCompletedBlockClojure);
return;
}
UIImage *targetImage = nil;
NSData *targetData = nil;
if (image) {
// case 2a: we got an image and the SDWebImageAvoidAutoSetImage is not set
targetImage = image;
targetData = data;
} else if (options & SDWebImageDelayPlaceholder) {
// case 2b: we got no image and the SDWebImageDelayPlaceholder flag is set
targetImage = placeholder;
targetData = nil;
}
#if SD_UIKIT || SD_MAC
// check whether we should use the image transition
SDWebImageTransition *transition = nil;
if (finished && (options & SDWebImageForceTransition || cacheType == SDImageCacheTypeNone)) {
transition = sself.sd_imageTransition;
}
#endif
dispatch_main_async_safe(^{
#if SD_UIKIT || SD_MAC
[sself sd_setImage:targetImage imageData:targetData basedOnClassOrViaCustomSetImageBlock:setImageBlock transition:transition cacheType:cacheType imageURL:imageURL];
#else
[sself sd_setImage:targetImage imageData:targetData basedOnClassOrViaCustomSetImageBlock:setImageBlock cacheType:cacheType imageURL:imageURL];
#endif
callCompletedBlockClojure();
});
}];
[self sd_setImageLoadOperation:operation forKey:validOperationKey];
} else {
#if SD_UIKIT || SD_MAC
[self sd_stopImageIndicator];
#endif
dispatch_main_async_safe(^{
if (completedBlock) {
NSError *error = [NSError errorWithDomain:SDWebImageErrorDomain code:SDWebImageErrorInvalidURL userInfo:@{NSLocalizedDescriptionKey : @"Image url is nil"}];
completedBlock(nil, nil, error, SDImageCacheTypeNone, YES, url);
}
});
}
}
- (void)sd_cancelCurrentImageLoad {
[self sd_cancelImageLoadOperationWithKey:NSStringFromClass([self class])];
}
- (void)sd_setImage:(UIImage *)image imageData:(NSData *)imageData basedOnClassOrViaCustomSetImageBlock:(SDSetImageBlock)setImageBlock cacheType:(SDImageCacheType)cacheType imageURL:(NSURL *)imageURL {
#if SD_UIKIT || SD_MAC
[self sd_setImage:image imageData:imageData basedOnClassOrViaCustomSetImageBlock:setImageBlock transition:nil cacheType:cacheType imageURL:imageURL];
#else
// watchOS does not support view transition. Simplify the logic
if (setImageBlock) {
setImageBlock(image, imageData, cacheType, imageURL);
} else if ([self isKindOfClass:[UIImageView class]]) {
UIImageView *imageView = (UIImageView *)self;
[imageView setImage:image];
}
#endif
}
#if SD_UIKIT || SD_MAC
- (void)sd_setImage:(UIImage *)image imageData:(NSData *)imageData basedOnClassOrViaCustomSetImageBlock:(SDSetImageBlock)setImageBlock transition:(SDWebImageTransition *)transition cacheType:(SDImageCacheType)cacheType imageURL:(NSURL *)imageURL {
UIView *view = self;
SDSetImageBlock finalSetImageBlock;
if (setImageBlock) {
finalSetImageBlock = setImageBlock;
} else if ([view isKindOfClass:[UIImageView class]]) {
UIImageView *imageView = (UIImageView *)view;
finalSetImageBlock = ^(UIImage *setImage, NSData *setImageData, SDImageCacheType setCacheType, NSURL *setImageURL) {
imageView.image = setImage;
};
}
#if SD_UIKIT
else if ([view isKindOfClass:[UIButton class]]) {
UIButton *button = (UIButton *)view;
finalSetImageBlock = ^(UIImage *setImage, NSData *setImageData, SDImageCacheType setCacheType, NSURL *setImageURL) {
[button setImage:setImage forState:UIControlStateNormal];
};
}
#endif
#if SD_MAC
else if ([view isKindOfClass:[NSButton class]]) {
NSButton *button = (NSButton *)view;
finalSetImageBlock = ^(UIImage *setImage, NSData *setImageData, SDImageCacheType setCacheType, NSURL *setImageURL) {
button.image = setImage;
};
}
#endif
if (transition) {
#if SD_UIKIT
[UIView transitionWithView:view duration:0 options:0 animations:^{
// 0 duration to let UIKit render placeholder and prepares block
if (transition.prepares) {
transition.prepares(view, image, imageData, cacheType, imageURL);
}
} completion:^(BOOL finished) {
[UIView transitionWithView:view duration:transition.duration options:transition.animationOptions animations:^{
if (finalSetImageBlock && !transition.avoidAutoSetImage) {
finalSetImageBlock(image, imageData, cacheType, imageURL);
}
if (transition.animations) {
transition.animations(view, image);
}
} completion:transition.completion];
}];
#elif SD_MAC
[NSAnimationContext runAnimationGroup:^(NSAnimationContext * _Nonnull prepareContext) {
// 0 duration to let AppKit render placeholder and prepares block
prepareContext.duration = 0;
if (transition.prepares) {
transition.prepares(view, image, imageData, cacheType, imageURL);
}
} completionHandler:^{
[NSAnimationContext runAnimationGroup:^(NSAnimationContext * _Nonnull context) {
context.duration = transition.duration;
context.timingFunction = transition.timingFunction;
context.allowsImplicitAnimation = (transition.animationOptions & SDWebImageAnimationOptionAllowsImplicitAnimation);
if (finalSetImageBlock && !transition.avoidAutoSetImage) {
finalSetImageBlock(image, imageData, cacheType, imageURL);
}
if (transition.animations) {
transition.animations(view, image);
}
} completionHandler:^{
if (transition.completion) {
transition.completion(YES);
}
}];
}];
#endif
} else {
if (finalSetImageBlock) {
finalSetImageBlock(image, imageData, cacheType, imageURL);
}
}
}
#endif
- (void)sd_setNeedsLayout {
#if SD_UIKIT
[self setNeedsLayout];
#elif SD_MAC
[self setNeedsLayout:YES];
#elif SD_WATCH
// Do nothing because WatchKit automatically layout the view after property change
#endif
}
#if SD_UIKIT || SD_MAC
#pragma mark - Image Transition
- (SDWebImageTransition *)sd_imageTransition {
return objc_getAssociatedObject(self, @selector(sd_imageTransition));
}
- (void)setSd_imageTransition:(SDWebImageTransition *)sd_imageTransition {
objc_setAssociatedObject(self, @selector(sd_imageTransition), sd_imageTransition, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
#pragma mark - Indicator
- (id<SDWebImageIndicator>)sd_imageIndicator {
return objc_getAssociatedObject(self, @selector(sd_imageIndicator));
}
- (void)setSd_imageIndicator:(id<SDWebImageIndicator>)sd_imageIndicator {
// Remove the old indicator view
id<SDWebImageIndicator> previousIndicator = self.sd_imageIndicator;
[previousIndicator.indicatorView removeFromSuperview];
objc_setAssociatedObject(self, @selector(sd_imageIndicator), sd_imageIndicator, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
// Add the new indicator view
UIView *view = sd_imageIndicator.indicatorView;
if (CGRectEqualToRect(view.frame, CGRectZero)) {
view.frame = self.bounds;
}
// Center the indicator view
#if SD_MAC
CGPoint center = CGPointMake(NSMidX(self.bounds), NSMidY(self.bounds));
NSRect frame = view.frame;
view.frame = NSMakeRect(center.x - NSMidX(frame), center.y - NSMidY(frame), NSWidth(frame), NSHeight(frame));
#else
view.center = CGPointMake(CGRectGetMidX(self.bounds), CGRectGetMidY(self.bounds));
#endif
view.hidden = NO;
[self addSubview:view];
}
- (void)sd_startImageIndicator {
id<SDWebImageIndicator> imageIndicator = self.sd_imageIndicator;
if (!imageIndicator) {
return;
}
dispatch_main_async_safe(^{
[imageIndicator startAnimatingIndicator];
});
}
- (void)sd_stopImageIndicator {
id<SDWebImageIndicator> imageIndicator = self.sd_imageIndicator;
if (!imageIndicator) {
return;
}
dispatch_main_async_safe(^{
[imageIndicator stopAnimatingIndicator];
});
}
#endif
@end