ios - 将 2 个 PHFetchResults 组合在一起

Question

Swift 和 iOS 开发的新手。有人能告诉我如何将两次调用 PHAssetCollection.fetchAssetCollectionsWithType 的结果结合起来吗？具体来说，我试图获得一个列表，其中包含一个列表中的标准相册和智能相册。

谢谢

Answer 1

我不确定这是否是最佳实践或其他什么，但我今天需要做这样的事情并且以下似乎有效:

@property NSMutableArray<PHAssetCollection *> *collections;

...

/* Get albums of interest */
PHFetchResult *albums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype: ... options: ...];
/* Get smart albums of interest (in my case, the Camera Roll) */
PHFetchResult *cameraRoll = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeSmartAlbumUserLibrary options: ...];
/* Load albums into collections member */
for (NSUInteger i = 0; i < albums.count; ++i)
    [self.collections addObject:[albums objectAtIndex:i]];
/* Load Camera Roll into collections member */
[self.collections addObject:[cameraRoll firstObject]];

请记住在向其添加对象之前初始化您的集合成员。