检查给定的PHAsset是iCloud资产吗？ [英] Check given PHAsset is iCloud asset?

问题描述

我正在尝试获取PhAsset对象。我想隔离iCloud资产。这是我的代码，

I'm trying to get PhAsset object. I want to segregate iCloud assets. Here is my code,

PHFetchResult *cloudAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeAlbum subtype:PHAssetCollectionSubtypeAny options:nil];

[cloudAlbums enumerateObjectsUsingBlock:^(PHAssetCollection *collection, NSUInteger idx, BOOL *stop){
    if(collection != nil){

        PHFetchResult *result = [PHAsset fetchAssetsInAssetCollection:collection options:fetchOptions];
        [result enumerateObjectsUsingBlock:^(PHAsset *asset, NSUInteger idx, BOOL *stop)
         {
            // check asset is iCloud asset 

         }];
    }

}];

请告诉我如何找到PHAsset是iCloud资产？

Please tell me how to find the PHAsset is iCloud asset?

推荐答案

实际上有两种情况：
1.照片由此设备捕获，并上传到iCloud。然后，您可以使用progressHandler检查是否需要iCloud下载。

There are actually 2 kinds of situations: 1. The photo is captured by this device, and is uploaded to iCloud. Then, you can use the progressHandler to check whether it needs iCloud download.

__block BOOL isPhotoInICloud = NO;
PHImageRequestOptions *options = [[PHImageRequestOptions alloc] init];
options.networkAccessAllowed = YES;
options.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
options.progressHandler = ^(double progress, NSError *error, BOOL *stop, NSDictionary *info){

        isPhotoInICloud = YES;

});

[[PHImageManager defaultManager] requestImageForAsset:asset targetSize:PHImageManagerMaximumSize contentMode:PHImageContentModeAspectFit options:options resultHandler:^(UIImage * _Nullable result, NSDictionary * _Nullable info) {

        if (isPhotoInICloud) {
            // Photo is in iCloud.
        }
});

1. 照片在iCloud中，但是从其他网站上传设备。而且您没有将其保存到您当地的照片库。因此，永远不会调用progressHandler块。我不知道为什么，但这是真的，我认为这是PhotoKit框架的一个错误。
   对于这种情况，如果你使用PHImageResultIsInCloudKey，这也很困难。因为您可以在requestImageForAsset的resultHandler块中知道PHImageResultIsInCloudKey值。但这是照片请求启动后的时间。

所以，至少在我看来，没有办法检查是否照片存储在iCloud中。
也许还有其他更好的方法，请告诉我。
非常感谢！

So, at least, in my opinion, there is no way to check whether photo is stored in iCloud. Maybe there is other better way, please let me know. Thanks very much!

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