Question

我的ipad设备中有自定义文件夹。我使用此代码从自定义相册中获取图像：

self.assetGroups = [[NSMutableArray alloc] init];
// Group enumerator Block
dispatch_async(dispatch_get_main_queue(), ^
{
   void (^assetGroupEnumerator)(ALAssetsGroup *, BOOL *) = ^(ALAssetsGroup *group, BOOL *stop)
   {
       if (group == nil) {
           return;
       }
       if ([[group valueForProperty:ALAssetsGroupPropertyName] isEqualToString:@"Ganesh"]) {
           [self.assetGroups addObject:group];
           [self loadImages];
           return;
       }
       if (stop) {
          return;
       }
   };

   // Group Enumerator Failure Block
   void (^assetGroupEnumberatorFailure)(NSError *) = ^(NSError *error) {
       UIAlertView * alert = [[UIAlertView alloc] 
           initWithTitle:@"ERROR" message:[NSString stringWithFormat:@"No Albums Available"] 
               delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
       [alert show];
       [alert release];
   };

    // Enumerate Albums
    self.library = [[ALAssetsLibrary alloc] init];
    [library enumerateGroupsWithTypes:ALAssetsGroupAll
    usingBlock:assetGroupEnumerator
    failureBlock:assetGroupEnumberatorFailure];
});

要从我的自定义文件夹中检索所有图像，我使用的是：

(void)loadImages {
    ALAssetsGroup *assetGroup = [self.assetGroups objectAtIndex:0];

    NSLog(@"asserts group %@",self.assetGroups);
    NSLog(@"ALBUM NAME:;%@",[assetGroup valueForProperty:ALAssetsGroupPropertyName]);

    [assetGroup enumerateAssetsUsingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop){
     if(result == nil) {
         return;
     }
     UIImage *img = [UIImage imageWithCGImage:[[result defaultRepresentation] fullScreenImage] 
         scale:1.0 orientation:(UIImageOrientation)[[result valueForProperty:@"ALAssetPropertyOrientation"] intValue]];
     NSLog(@"image name%@",img);
     [arrayOfImage addObject:img];
     NSLog(@"arrayOfImage %@",arrayOfImage);
     // [imageToAnimate setImage:img];
     }];
}

当我使用模拟器但不在设备中运行时它工作正常：它执行失败块并说没有相册可用。

Answer 1

它的工作正常。我已经关闭了我的位置服务，因为现在无法访问我的媒体工作正常。

Ipad从自定义相册设备问题中获取图像

1 个答案: