84669 Lernen von Personen
152542 Lernen von Personen
20005 Lernen von Personen
5487 Lernen von Personen
7821 Lernen von Personen
359900 Lernen von Personen
3350 Lernen von Personen
180660 Lernen von Personen
48569 Lernen von Personen
18603 Lernen von Personen
40936 Lernen von Personen
1549 Lernen von Personen
1183 Lernen von Personen
32909 Lernen von Personen
使用SDWebImage时如果先设置了占位图placeholderImage,加载完成后的图片如何淡入显示
ringa_lee
比方若使用UIImageView+WebCache 中的
[self.imageView sd_setImageWithURL:[NSURL URLWithString:@"http://pic6.huitu.com/res/20130116/84481_20130116142820494200_1.jpg"] placeholderImage:[UIImage imageNamed:@"test1.jpg"]];
方法
则再UIImageView+WebCache.m 中的这个方法中加入
- (void)sd_setImageWithURL:(NSURL *)url placeholderImage:(UIImage *)placeholder options:(SDWebImageOptions)options progress:(SDWebImageDownloaderProgressBlock)progressBlock completed:(SDWebImageCompletionBlock)completedBlock { [self sd_cancelCurrentImageLoad]; objc_setAssociatedObject(self, &imageURLKey, url, OBJC_ASSOCIATION_RETAIN_NONATOMIC); if (!(options & SDWebImageDelayPlaceholder)) { dispatch_main_async_safe(^{ self.image = placeholder; }); } if (url) { // check if activityView is enabled or not if ([self showActivityIndicatorView]) { [self addActivityIndicator]; } __weak __typeof(self)wself = self; id <SDWebImageOperation> operation = [SDWebImageManager.sharedManager downloadImageWithURL:url options:options progress:progressBlock completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, BOOL finished, NSURL *imageURL) { [wself removeActivityIndicator]; if (!wself) return; dispatch_main_sync_safe(^{ if (!wself) return; if (image && (options & SDWebImageAvoidAutoSetImage) && completedBlock) { completedBlock(image, error, cacheType, url); return; } #warning 成功请求到图片的时候 else if (image) { // wself.image = image; 原来的判断内的实现 改成 CATransition *transition = [CATransition animation]; transition.type = kCATransitionFade; transition.duration = 3.0f; transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; [self.layer addAnimation:transition forKey:nil]; wself.image = image; [wself setNeedsLayout]; } else { if ((options & SDWebImageDelayPlaceholder)) { wself.image = placeholder; [wself setNeedsLayout]; } } if (completedBlock && finished) { completedBlock(image, error, cacheType, url); } }); }]; [self sd_setImageLoadOperation:operation forKey:@"UIImageViewImageLoad"]; } else { dispatch_main_async_safe(^{ [self removeActivityIndicator]; NSError *error = [NSError errorWithDomain:SDWebImageErrorDomain code:-1 userInfo:@{NSLocalizedDescriptionKey : @"Trying to load a nil url"}]; if (completedBlock) { completedBlock(nil, error, SDImageCacheTypeNone, url); } }); } }
试试放进动画里?
比方若使用UIImageView+WebCache 中的
方法
则再UIImageView+WebCache.m 中的
这个方法中加入
试试放进动画里?