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当拍摄照片（iOS 8.1）并调用 didFinishPickingMediaWithInfo 时，我正在尝试使用 PhotoKit 将 GPS 数据重新添加到元数据中。

这是我正在使用的代码：

 UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{

    PHAssetChangeRequest *newAssetRequest = [PHAssetChangeRequest creationRequestForAssetFromImage:image];
    newAssetRequest.creationDate = [NSDate date];
    newAssetRequest.location = [self deviceLocation];
    NSLog(@"didFinishPickingMediaWithInfo: location:%@",  newAssetRequest.location);

    PHObjectPlaceholder *placeholderAsset = newAssetRequest.placeholderForCreatedAsset;

    PHAssetCollectionChangeRequest *addAssetRequest = [PHAssetCollectionChangeRequest changeRequestForAssetCollection:self.myResults[0]];
    [addAssetRequest addAssets:@[placeholderAsset]];

} completionHandler:^(BOOL success, NSError *error) {
    if (success) {
        NSLog(@"didFinishPickingMediaWithInfo: Success saving picture to album");
    } else {
        NSLog(@"didFinishPickingMediaWithInfo: error saving picture to album %@", error);
    }
}];

[picker dismissViewControllerAnimated:YES completion:nil];

该代码获取图像并将其移动到相册。这部分有效。照片最终出现在正确的相册中。

问题是即使位置属性设置正确，元数据中也不存在 GPS 数据。我知道位置数据是有效的。

这不应该工作吗？是否有替代方法来获得所需的结果？我并不关心所有其他元数据，只关心 GPS 坐标。

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