当视频 url 保存在图库中时显示错误：Domain=NSCocoaErrorDomain Code=-1 "(null)" in swift

如何解决当视频 url 保存在图库中时显示错误：Domain=NSCocoaErrorDomain Code=-1 "(null)" in swift

-在图库中保存视频网址时 - 我也设置了读写权限。

错误：域=NSCocoaErrorDomain Code=-1 "(null)" in swift。

private func saveVideoToPhotos(url : URL?) {
        if let url = url,let urlData = NSData(contentsOf: url) {
            let galleryPath = NSSearchPathForDirectoriesInDomains(.documentDirectory,.userDomainMask,true)[0];
    
            let filePath = galleryPath.appending("/videoFileName.mp4")
            print(filePath)
            dispatchQueue.main.async {
                urlData.write(toFile: filePath,atomically: false)
                PHPhotoLibrary.shared().performChanges({
                    PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL:URL(fileURLWithPath: filePath))
                }) {
                    success,error in
                    if success {
                    
                        print("Succesfully Saved")
                    } else {
                        dispatchQueue.main.async {
           
                            print(error.debugDescription)
                            self.popupAlert(title: "Request Failed.please try again later!",actionTitles: ["ok"],actionStyle: [.default],action: [{_ in }])
                        }
                        
                    }
                }
            }
        }else{
            dispatchQueue.main.async {
               
                self.popupAlert(title: "Request Failed.please try again later!",action: [{_ in }])
            }
        }
    }