保存视频到相册的相关代码

@implementation ALAssetsLibrary (ZHExpand)

 

/**

 *  创建本地相册

 *

 *  @param name                        相册名称

 *  @param enumerateGroupsFailureBlock 遍历相册分组失败回调

 *  @param hasGroup                    本地已经存在该相册，请重新命名

 *  @param createSuccessedBlock        创建相册成功回调

 *  @param createFaieldBlock           创建相册失败回调

 */

- (void)zh_createAssetsGroupWithName:(NSString*)name

         enumerateGroupsFailureBlock:(void (^) (NSError *error))enumerateGroupsFailureBlock

                 hasTheNewGroupBlock:(void (^) (ALAssetsGroup *group))hasGroup

                createSuccessedBlock:(void (^) (ALAssetsGroup *group))createSuccessedBlock

                   createFaieldBlock:(void (^) (NSError *error))createFaieldBlock

{

     

    __block BOOL hasTheNewGroup = NO;

     

    [self enumerateGroupsWithTypes:ALAssetsGroupAlbum usingBlock:^(ALAssetsGroup *group, BOOL *stop) {

         

        hasTheNewGroup = [name isEqualToString:[group valueForProperty:ALAssetsGroupPropertyName]];

        if (hasTheNewGroup) {

 

            [ZHBlock dispatchOnMainThread:^{

                 

                hasGroup(group);

            }];

            *stop = YES;

        }

        if (!group && !hasTheNewGroup && !*stop) {//遍历完毕，本地没有该文件夹，非手动停止的遍历

             

            [self addAssetsGroupAlbumWithName:name resultBlock:^(ALAssetsGroup *agroup) {

                 

                [ZHBlock dispatchOnMainThread:^{

                     

                    createSuccessedBlock(agroup);

                }];

            } failureBlock:^(NSError *error) {

                 

                [ZHBlock dispatchOnMainThread:^{

                     

                    createFaieldBlock(error);

                }];

            }];

        }

    } failureBlock:^(NSError *error) {

         

        [ZHBlock dispatchOnMainThread:^{

             

            enumerateGroupsFailureBlock(error);

        }];

    }];

}

 

/**

 *  保存视频到指定相册（直接调用可保存到指定分组）

 *

 *  @param path             视频路径

 *  @param name             相册名称

 *  @param saveSuccessBlock 保存成功回调

 *  @param saveFaieldBlock  保存失败回调

 */

- (void)zh_saveVideoWithVideoPath:(NSString*)path

                          toAlbum:(NSString*)name

                 saveSuccessBlock:(void (^) (ALAssetsGroup *group, NSURL *assetURL, ALAsset *asset))saveSuccessBlock

                  saveFaieldBlock:(void (^) (NSError *error))saveFaieldBlock

{

     

    [self writeVideoAtPathToSavedPhotosAlbum:[NSURL fileURLWithPath:path] completionBlock:^(NSURL *assetURL, NSError *error) {//先添加到公众相册

         

        if (error) {

            [ZHBlock dispatchOnMainThread:^{

                 

                saveFaieldBlock(error);

            }];

            return;

        }

         

        [self zh_addVideoToAssetGroupWithAssetUrl:assetURL toAlbum:name addSuccessBlock:^(ALAssetsGroup *targetGroup, NSURL *currentAssetUrl, ALAsset *currentAsset) {

             

            [ZHBlock dispatchOnMainThread:^{

                 

                saveSuccessBlock(targetGroup,currentAssetUrl,currentAsset);

            }];

        } addFaieldBlock:^(NSError *error) {

             

            [ZHBlock dispatchOnMainThread:^{

                 

                saveFaieldBlock(error);

            }];

        }];

    }];

}

 

/**

 *  添加相册视频到指定分组

 *

 *  @param assetURL        视频在相册的URL

 *  @param name            指定分组名称

 *  @param addSuccessBlock 添加成功回调

 *  @param addFaieldBlock  添加失败回调

 */

- (void)zh_addVideoToAssetGroupWithAssetUrl:(NSURL*)assetURL

                                    toAlbum:(NSString*)name

                            addSuccessBlock:(void (^) (ALAssetsGroup *targetGroup, NSURL *currentAssetUrl, ALAsset *currentAsset))addSuccessBlock

                             addFaieldBlock:(void (^) (NSError *error))addFaieldBlock

{

 

    [self zh_createAssetsGroupWithName:name enumerateGroupsFailureBlock:^(NSError *error) {

         

        if (error) {

            [ZHBlock dispatchOnMainThread:^{

                 

                addFaieldBlock(error);

            }];

            return ;

        }

    } hasTheNewGroupBlock:^(ALAssetsGroup *group) {

         

        [self assetForURL:assetURL resultBlock:^(ALAsset *asset) {//得到视频的ALAsset实例

             

            [group addAsset:asset];//添加视频到指定相册分组

            [ZHBlock dispatchOnMainThread:^{

                 

                addSuccessBlock(group,assetURL,asset);

            }];

        } failureBlock:^(NSError *error) {

             

            if (error) {

                [ZHBlock dispatchOnMainThread:^{

                     

                    addFaieldBlock(error);

                }];

                return ;

            }

        }];

    } createSuccessedBlock:^(ALAssetsGroup *group) {

         

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

             

            [group addAsset:asset];

            [ZHBlock dispatchOnMainThread:^{

                 

                addSuccessBlock(group,assetURL,asset);

            }];

        } failureBlock:^(NSError *error) {

             

            if (error) {

                [ZHBlock dispatchOnMainThread:^{

                     

                    addFaieldBlock(error);

                }];

                return ;

            }

        }];

    } createFaieldBlock:^(NSError *error) {

         

        if (error) {

            [ZHBlock dispatchOnMainThread:^{

                 

                addFaieldBlock(error);

            }];

            return ;

        }

    }];

}