objective-c - PHPhotoLibrary 保存一个 gif 数据

Question

我无法在新的 PHPhotoLibrary 中找到与 ALAssetsLibrary->writeImageDataToSavedPhotosAlbum 类似的方法，因为 ALAssetsLibrary 在 iOS 9 中已弃用我无法保存 GIF 可能我正在使用此代码

[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
        PHAssetChangeRequest *assetRequest = [PHAssetChangeRequest creationRequestForAssetFromImage:[UIImage imageWithData:gifdata]];
        placeholder = [assetRequest placeholderForCreatedAsset];
        photosAsset = [PHAsset fetchAssetsInAssetCollection:collection options:nil];
        PHAssetCollectionChangeRequest *albumChangeRequest = [PHAssetCollectionChangeRequest changeRequestForAssetCollection:collection
                                                                                                                      assets:photosAsset];
        [albumChangeRequest addAssets:@[placeholder]];
    } completionHandler:^(BOOL success, NSError *error) {
        if (success)
        {

        }
        else
        {

            NSLog(@"%@", error);
        }
    }];

Answer 1

我使用NSData来保存gif图片，ALAssetsLibrary方法UIImageWriteToSavedPhotosAlbum在iOS8之后弃用了，api说我们可以使用PHAssetCreationRequest方法[[PHAssetCreationRequest creationRequestForAsset] addResourceWithType:PHAssetResourceTypePhoto data:data options:options]; 来保存这个gif图像数据，所以你也可以使用url请求来保存gifs

代码如下:

NSString *path = [[NSBundle mainBundle] pathForResource:@"1" ofType:@"gif"];
NSData *data = [NSData dataWithContentsOfFile:path];
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
    PHAssetResourceCreationOptions *options = [[PHAssetResourceCreationOptions alloc] init];
    [[PHAssetCreationRequest creationRequestForAsset] addResourceWithType:PHAssetResourceTypePhoto data:data options:options];
} completionHandler:^(BOOL success, NSError * _Nullable error) {
    NSLog(@"：%d",success);
}];