8

我一直在关注本教程http://www.touch-code-magazine.com/ios5-saving-photos-in-custom-photo-album-category-for-download/将图像保存到自定义相册。这工作正常,但它保存到相机胶卷和我的自定义相册。

查看代码,这似乎是一个必要的步骤,因为在将图像保存到相机胶卷后,我们有一个 ALAsset 可以与 ALAssetsGroup addAsset: 方法一起使用。

有没有一种方法可以将图像添加到自定义相册而不将其添加到相机胶卷?

当前使用此代码:

-(void)saveImage:(UIImage*)image toAlbum:(NSString*)albumName withCompletionBlock:(SaveImageCompletion)completionBlock
{

 //write the image data to the assets library (camera roll)
    [self writeImageToSavedPhotosAlbum:image.CGImage orientation:(ALAssetOrientation)image.imageOrientation 
                        completionBlock:^(NSURL* assetURL, NSError* error) {

                      //error handling
                      if (error!=nil) {
                          completionBlock(error);
                          return;
                      }

                      //add the asset to the custom photo album
                      [self addAssetURL: assetURL 
                                toAlbum:albumName 
                    withCompletionBlock:completionBlock];

                  }];
}

-(void)addAssetURL:(NSURL*)assetURL toAlbum:(NSString*)albumName withCompletionBlock:(SaveImageCompletion)completionBlock
{
__block BOOL albumWasFound = NO;

//search all photo albums in the library
[self enumerateGroupsWithTypes:ALAssetsGroupAlbum 
                    usingBlock:^(ALAssetsGroup *group, BOOL *stop) {

                        //compare the names of the albums
                        if ([albumName compare: [group valueForProperty:ALAssetsGroupPropertyName]]==NSOrderedSame) {

                            //target album is found
                            albumWasFound = YES;

                            //get a hold of the photo's asset instance
                            [self assetForURL: assetURL 
                                  resultBlock:^(ALAsset *asset) {

                                      //add photo to the target album
                                      [group addAsset: asset];

                                      //run the completion block
                                      completionBlock(nil);

                                  } failureBlock: completionBlock];

                            //album was found, bail out of the method
                            return;
                        }

                        if (group==nil && albumWasFound==NO) {
                            //photo albums are over, target album does not exist, thus create it

                            __weak ALAssetsLibrary* weakSelf = self;

                            //create new assets album
                            [self addAssetsGroupAlbumWithName:albumName 
                                                  resultBlock:^(ALAssetsGroup *group) {

                                                      //get the photo's instance
                                                      [weakSelf assetForURL: assetURL 
                                                                    resultBlock:^(ALAsset *asset) {

                                                                        //add photo to the newly created album
                                                                        [group addAsset: asset];

                                                                        //call the completion block
                                                                        completionBlock(nil);

                                                                    } failureBlock: completionBlock];

                                                  } failureBlock: completionBlock];

                            //should be the last iteration anyway, but just in case
                            return;
                        }

                    } failureBlock: completionBlock];

}
4

1 回答 1

6

事实证明没有 - 默认情况下,图像将始终写入相机胶卷。

于 2013-05-03T17:52:28.903 回答