ios - 如何将视频剪辑保存到照片库-iOS 8和9

Question

我已经解决了将视频剪辑保存到“照片库”的问题。
这里的代码如下，但它不起作用。
即使saveVideo返回true，但我打开“照片画廊”仍无法获取视频剪辑。

文件路径

是本地文档目录上的位置

func saveVideo(filePath: String) {
  UISaveVideoAtPathToSavedPhotosAlbum (filePath, self,"video:didFinishSavingWithError:contextInfo:", nil)
}

func video(filePath: String, didFinishSavingWithError error: NSError?, contextInfo:UnsafePointer<Void>) {
    if error == nil {
        let ac = UIAlertController(title: "Saved!", message: "Your altered video has been saved to your gallery.", preferredStyle: .Alert)
        ac.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
        self.presentViewController(ac, animated: true, completion: nil)
    } else {
        let ac = UIAlertController(title: "Save error", message: error?.localizedDescription, preferredStyle: .Alert)
        ac.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
        self.presentViewController(ac, animated: true, completion: nil)
    }
}

Answer 1

PHPhotoLibrary.sharedPhotoLibrary().performChanges({ () -> Void in

        let createAssetRequest: PHAssetChangeRequest = PHAssetChangeRequest.creationRequestForAssetFromVideoAtFileURL(NSURL(string: filePath)!)!
        createAssetRequest.placeholderForCreatedAsset

        }) { (success, error) -> Void in
            if success {

                //popup alert success
            }
            else {
               //popup alert unsuccess
            }
    }