iOS 将照片保存在特定应用的相册中 [英] iOS save photo in an app specific album

问题描述

我正在创建一个 iOS 5 应用程序.我想将照片保存到设备中.

I'm creating an iOS 5 app. I want to save a photo to the device.

我想将照片保存到特定于我的应用的相册中，因此我需要创建相册，然后将照片保存到相册中.

I want to save the photo to an album specific to my app, so I need to create the album, and then save photos to the album.

我知道如何创建相册:

ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library addAssetsGroupAlbumWithName:@"MY APP NAME" resultBlock:^(ALAssetsGroup *group) {
    //How to get the album URL?
} failureBlock:^(NSError *error) {
    //Handle the error
}];

我现在想将照片添加到新相册，我该怎么做?示例代码非常感谢！

I want add photos to the new album now, how do I do so? Sample code is greatly appreciated!

推荐答案

你可以使用下面的代码只是改变专辑的名字:

You may use the following code just change the name of album :

__weak ALAssetsLibrary *lib = self.library;

[self.library addAssetsGroupAlbumWithName:@"My Photo Album" resultBlock:^(ALAssetsGroup *group) {

    ///checks if group previously created
    if(group == nil){

        //enumerate albums
        [lib enumerateGroupsWithTypes:ALAssetsGroupAlbum
                           usingBlock:^(ALAssetsGroup *g, BOOL *stop)
         {
             //if the album is equal to our album
             if ([[g valueForProperty:ALAssetsGroupPropertyName] isEqualToString:@"My Photo Album"]) {

                 //save image
                 [lib writeImageDataToSavedPhotosAlbum:UIImagePNGRepresentation(image) metadata:nil
                                       completionBlock:^(NSURL *assetURL, NSError *error) {

                                           //then get the image asseturl
                                           [lib assetForURL:assetURL
                                                resultBlock:^(ALAsset *asset) {
                                                    //put it into our album
                                                    [g addAsset:asset];
                                                } failureBlock:^(NSError *error) {

                                                }];
                                       }];

             }
         }failureBlock:^(NSError *error){

         }];

    }else{
        // save image directly to library
        [lib writeImageDataToSavedPhotosAlbum:UIImagePNGRepresentation(image) metadata:nil
                              completionBlock:^(NSURL *assetURL, NSError *error) {

                                  [lib assetForURL:assetURL
                                       resultBlock:^(ALAsset *asset) {

                                           [group addAsset:asset];

                                       } failureBlock:^(NSError *error) {

                                       }];
                              }];
    }

} failureBlock:^(NSError *error) {

}];

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