swift - 无法打开NSCocoaErrorDomain Code = 257文件，因为您无权查看: FileManager attributesOfItem returns nil in iOS13

Question

在iOS 13设备中，尝试获取文件大小时，FileManager返回权限错误。

do {
    let attr = try FileManager.default.attributesOfItem(atPath: my_file_path) //--> Getting nil
    fileSize = attr[FileAttributeKey.size] as! UInt64
} catch {
    print("Error: \(error)")
}

返回错误:

Error Domain=NSCocoaErrorDomain Code=257 "The file “trim.1A9FFC19-EE2C-438A-BF3D-97E05A97EF9E.MOV” couldn’t be opened because you don’t have permission to view it." UserInfo={NSFilePath=/private/var/mobile/Containers/Data/PluginKitPlugin/ADB8684E-12B5-451D-A20F-158B899BB3DD/tmp/trim.1A9FFC19-EE2C-438A-BF3D-97E05A97EF9E.MOV, NSUnderlyingError=0x280af0510 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}}

仅当我更新到iOS 13之后，才观察到该问题。在早期版本中，一切正常。

Answer 1

iOS 13 SDK将照片应用程序视为另一个应用程序，因此当我们关闭图像选择器 Controller 时，视频网址将无效。

在尝试将视频上传到AWS之前，我遇到了问题，我只是创建了一个临时文件夹并在关闭Image-picker之前复制了现有的视频URL路径。然后将其上传，就可以了。

    func createDirectory(videoURL:URL){
            let Directorypath = getDirectoryPath()
            var objcBool:ObjCBool = true
            let isExist =  FileManager.default.fileExists(atPath:Directorypath,isDirectory: &objcBool)
            // If the folder with the given path doesn't exist already, create it
            if isExist == false{
                do{
                    try FileManager.default.createDirectory(atPath: Directorypath, withIntermediateDirectories: true, attributes: nil)
                }catch{

                    print("Something went wrong while creating a new folder")
                }
            }
            let fileManager = FileManager()

            do {
                if fileManager.fileExists(atPath:Directorypath) {
                    try? fileManager.removeItem(at: URL(fileURLWithPath:Directorypath))
                }
                try fileManager.copyItem(at:videoURL.absoluteURL, to: URL(fileURLWithPath:Directorypath))

                 self.imagePicker.dismiss(animated: true, completion:nil)
              }catch let error {
                              print(error.localizedDescription)
              }

   }