Question

目前我的图片只是弹出进入视图。我希望它们能够淡出。

我试过这个，没有运气：

SDImageCache *imageCache = [SDImageCache sharedImageCache];
        [imageCache queryDiskCacheForKey:encodedString done:^(UIImage *image, SDImageCacheType cacheType) {

            if (image){
                cell.thumbnailImageView.image = image;
            }else{
                [cell.thumbnailImageView setImageWithURL:[NSURL URLWithString:encodedString] placeholderImage:myImage completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType) {

                    [imageCache storeImage:image forKey:encodedString];

                }];

                UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
                imageView.alpha = 0;

                [UIView animateWithDuration:5.0 animations:^{
                    imageView.alpha = 1.0;
                }];
            }
        }];

Answer 1

你的else块应如下所示：

[[SDWebImageManager sharedManager] downloadWithURL:[NSURL URLWithString:encodedString]
                                    options:0
                                   progress:nil
                                  completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, BOOL finished) {

                    [imageCache storeImage:image forKey:encodedString];
                    UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
                    imageView.alpha = 0;

                    [UIView animateWithDuration:5.0 animations:^{
                       imageView.alpha = 1.0;
                    }];
                }];

Answer 2

尝试以下代码。

__ weak typeof（UIImageView）* weakimgView = imgView;

    [imgView setImageWithURL:[NSURL URLWithString:_photo.url placeholderImage:[UIImage imageNamed:@"photoIcon"] options:SDWebImageRetryFailed completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType) {

            [weakimgView setAlpha:0.4];

            [UIView beginAnimations:nil context:nil];
            [UIView setAnimationDuration:0.5];

            weakimgView.image = image;
            [weakimgView setAlpha:1.0];


            [UIView commitAnimations];


    }];

希望这会对你有所帮助。快乐编码：）

如何淡入SDImageCache图像

2 个答案: