针对SDPhotoBrowser不支持保存gif图片，提出的解决方法

最近在做图片预览和保存时候发现，SDPhotoBrowser保存的gif图片，竟变成了静态的gif图片，原以为iOS系统相册不支持GIF的播放，也就没注意，最后在微信发图的时候发现的确变成了静态gif图片，才知道这个出现了问题，在这个库里保存的是图片，而保存gif时候要保存数据流才不会变成静态图，最后解决方法如下：

- (void)saveImage

{

    int index =
_scrollView.contentOffset.x /
_scrollView.bounds.size.width;

    

    

    /*

     为了支持gif图片的存储此处改动原第三方库的内容如下：

     与原库比对可发现

        原来的

     

     

     

     */

    

//    UIImageView *currentImageView = _scrollView.subviews[index];

    

   // UIImageWriteToSavedPhotosAlbum(currentImageView.image, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);

    

    NSURL * url=[NSURL
URLWithString:[NSString
stringWithFormat:@"%@",[self
highQualityImageURLForIndex:index]]];

    

    [[SDWebImageDownloader
sharedDownloader]
downloadImageWithURL:url
options:SDWebImageDownloaderUseNSURLCache
progress:nil
completed:^(UIImage *image,
NSData *data,
NSError *error,
BOOL finished) {

        if ([UIDevice
currentDevice].systemVersion.floatValue >=
9.0f) {

            

            [[PHPhotoLibrary
sharedPhotoLibrary]
performChanges:^{

                PHAssetResourceCreationOptions *options = [[PHAssetResourceCreationOptions
alloc]
init];

                options.shouldMoveFile =
YES;

                [[PHAssetCreationRequest
creationRequestForAsset]
addResourceWithType:PHAssetResourceTypePhoto
data:data options:options];

            } completionHandler:^(BOOL success,
NSError * _Nullable error) {

                dispatch_sync(dispatch_get_main_queue(), ^{

                    //保存成功

                    

           // [self image:<#(UIImage *)#> didFinishSavingWithError:<#(NSError *)#> contextInfo:<#(void *)#>]

                    [self
didFinishSavingWithError:error];

                    

                });

            }];

        }

        else {

            ALAssetsLibrary *library = [[ALAssetsLibrary
alloc] init];

            [library writeImageDataToSavedPhotosAlbum:data
metadata:nil
completionBlock:^(NSURL *assetURL,
NSError *error) {

                dispatch_sync(dispatch_get_main_queue(), ^{

                    //保存成功

                     [self
didFinishSavingWithError:error];

                });

            }];

        }

    }];

    

    

    

    

    UIActivityIndicatorView *indicator = [[UIActivityIndicatorView
alloc]
init];

    indicator.activityIndicatorViewStyle =
UIActivityIndicatorViewStyleWhiteLarge;

    indicator.center =
self.center;

    _indicatorView = indicator;

    [[UIApplication
sharedApplication].keyWindow
addSubview:indicator];

    [indicator startAnimating];

}

//保存结果提示语的出现以及indicator的消失

- (void)didFinishSavingWithError:(NSError *)error;

{

    [_indicatorView
removeFromSuperview];

    

    UILabel *label = [[UILabel
alloc] init];

    label.textColor = [UIColor
whiteColor];

    label.backgroundColor = [UIColor
colorWithRed:0.1f
green:0.1f
blue:0.1f
alpha:0.90f];

    label.layer.cornerRadius =
5;

    label.clipsToBounds =
YES;

    label.bounds =
CGRectMake(0,
0, 150,
30);

    label.center =
self.center;

    label.textAlignment =
NSTextAlignmentCenter;

    label.font = [UIFont
boldSystemFontOfSize:17];

    [[UIApplication
sharedApplication].keyWindow
addSubview:label];

    [[UIApplication
sharedApplication].keyWindow
bringSubviewToFront:label];

    if (error) {

        label.text =
SDPhotoBrowserSaveImageFailText;

    }   else {

        label.text =
SDPhotoBrowserSaveImageSuccessText;

    }

    [label performSelector:@selector(removeFromSuperview)
withObject:nil
afterDelay:1.0];

}