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"
#if SD_UIKIT || SD_MAC
#import "objc/runtime.h"
#import "UIView+WebCacheOperation.h"
static char imageURLKey;
#if SD_UIKIT
static char TAG_ACTIVITY_INDICATOR;
static char TAG_ACTIVITY_STYLE;
#endif
static char TAG_ACTIVITY_SHOW;
@implementation UIView (WebCache)
- (nullable NSURL *)sd_imageURL {
return objc_getAssociatedObject(self, &imageURLKey);
}
- (void)sd_internalSetImageWithURL:(nullable NSURL *)url
placeholderImage:(nullable UIImage *)placeholder
options:(SDWebImageOptions)options
operationKey:(nullable NSString *)operationKey
setImageBlock:(nullable SDSetImageBlock)setImageBlock
progress:(nullable SDWebImageDownloaderProgressBlock)progressBlock
completed:(nullable SDExternalCompletionBlock)completedBlock {
NSString *validOperationKey = operationKey ?: NSStringFromClass([self class]);
[self sd_cancelImageLoadOperationWithKey:validOperationKey];
objc_setAssociatedObject(self, &imageURLKey, url, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
if (!(options & SDWebImageDelayPlaceholder)) {
dispatch_main_async_safe(^{
[self sd_setImage:placeholder imageData:nil basedOnClassOrViaCustomSetImageBlock:setImageBlock];
});
}
if (url) {
// check if activityView is enabled or not
if ([self showActivityIndicatorView]) {
[self addActivityIndicator];
}
__weak __typeof(self)wself = self;
id <SDWebImageOperation> operation = [SDWebImageManager.sharedManager loadImageWithURL:url options:options progress:progressBlock completed:^(UIImage *image, NSData *data, NSError *error, SDImageCacheType cacheType, BOOL finished, NSURL *imageURL) {
__strong __typeof (wself) sself = wself;
[sself removeActivityIndicator];
if (!sself) {
return;
}
dispatch_main_async_safe(^{
if (!sself) {
return;
}
if (image && (options & SDWebImageAvoidAutoSetImage) && completedBlock) {
completedBlock(image, error, cacheType, url);
return;
} else if (image) {
[sself sd_setImage:image imageData:data basedOnClassOrViaCustomSetImageBlock:setImageBlock];
[sself sd_setNeedsLayout];
} else {
if ((options & SDWebImageDelayPlaceholder)) {
[sself sd_setImage:placeholder imageData:nil basedOnClassOrViaCustomSetImageBlock:setImageBlock];
[sself sd_setNeedsLayout];
}
}
if (completedBlock && finished) {
completedBlock(image, error, cacheType, url);
}
});
}];
[self sd_setImageLoadOperation:operation forKey:validOperationKey];
} else {
dispatch_main_async_safe(^{
[self removeActivityIndicator];
if (completedBlock) {
NSError *error = [NSError errorWithDomain:SDWebImageErrorDomain code:-1 userInfo:@{NSLocalizedDescriptionKey : @"Trying to load a nil url"}];
completedBlock(nil, error, SDImageCacheTypeNone, url);
}
});
}
}
- (void)sd_cancelCurrentImageLoad {
[self sd_cancelImageLoadOperationWithKey:NSStringFromClass([self class])];
}
- (void)sd_setImage:(UIImage *)image imageData:(NSData *)imageData basedOnClassOrViaCustomSetImageBlock:(SDSetImageBlock)setImageBlock {
if (setImageBlock) {
setImageBlock(image, imageData);
return;
}
#if SD_UIKIT || SD_MAC
if ([self isKindOfClass:[UIImageView class]]) {
UIImageView *imageView = (UIImageView *)self;
imageView.image = image;
}
#endif
#if SD_UIKIT
if ([self isKindOfClass:[UIButton class]]) {
UIButton *button = (UIButton *)self;
[button setImage:image forState:UIControlStateNormal];
}
#endif
}
- (void)sd_setNeedsLayout {
#if SD_UIKIT
[self setNeedsLayout];
#elif SD_MAC
[self setNeedsLayout:YES];
#endif
}
#pragma mark - Activity indicator
#pragma mark -
#if SD_UIKIT
- (UIActivityIndicatorView *)activityIndicator {
return (UIActivityIndicatorView *)objc_getAssociatedObject(self, &TAG_ACTIVITY_INDICATOR);
}
- (void)setActivityIndicator:(UIActivityIndicatorView *)activityIndicator {
objc_setAssociatedObject(self, &TAG_ACTIVITY_INDICATOR, activityIndicator, OBJC_ASSOCIATION_RETAIN);
}
#endif
- (void)setShowActivityIndicatorView:(BOOL)show {
objc_setAssociatedObject(self, &TAG_ACTIVITY_SHOW, @(show), OBJC_ASSOCIATION_RETAIN);
}
- (BOOL)showActivityIndicatorView {
return [objc_getAssociatedObject(self, &TAG_ACTIVITY_SHOW) boolValue];
}
#if SD_UIKIT
- (void)setIndicatorStyle:(UIActivityIndicatorViewStyle)style{
objc_setAssociatedObject(self, &TAG_ACTIVITY_STYLE, [NSNumber numberWithInt:style], OBJC_ASSOCIATION_RETAIN);
}
- (int)getIndicatorStyle{
return [objc_getAssociatedObject(self, &TAG_ACTIVITY_STYLE) intValue];
}
#endif
- (void)addActivityIndicator {
#if SD_UIKIT
if (!self.activityIndicator) {
self.activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:[self getIndicatorStyle]];
self.activityIndicator.translatesAutoresizingMaskIntoConstraints = NO;
dispatch_main_async_safe(^{
[self addSubview:self.activityIndicator];
[self addConstraint:[NSLayoutConstraint constraintWithItem:self.activityIndicator
attribute:NSLayoutAttributeCenterX
relatedBy:NSLayoutRelationEqual
toItem:self
attribute:NSLayoutAttributeCenterX
multiplier:1.0
constant:0.0]];
[self addConstraint:[NSLayoutConstraint constraintWithItem:self.activityIndicator
attribute:NSLayoutAttributeCenterY
relatedBy:NSLayoutRelationEqual
toItem:self
attribute:NSLayoutAttributeCenterY
multiplier:1.0
constant:0.0]];
});
}
dispatch_main_async_safe(^{
[self.activityIndicator startAnimating];
});
#endif
}
- (void)removeActivityIndicator {
#if SD_UIKIT
if (self.activityIndicator) {
[self.activityIndicator removeFromSuperview];
self.activityIndicator = nil;
}
#endif
}
@end
#endif