Swift 1.2 to swift 2: Objective C 方法与可选需求方法冲突

Question

我正在尝试根据我在网上找到的教程 (https://www.raywenderlich.com/85528/user-accounts-ios-ruby-rails-swift#next_section) 开发一个访问 phone 相机的应用程序。然而，我在 imagePickerController 函数中的相机扩展不断抛出这个错误：

Objective-C method 'imagePickerController: didFinishPickingMediaWithInfo:' provided by method 'imagePickerController(_:didFinishPickingMediaWithInfo:)' conflicts with optional requirement method imagePickerController(_:didFinishPickingMediaWithInfo:)

这是抛出错误的代码

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {}

受影响的代码块如下图

// Camera Extension
extension SelfieCollectionViewController : UINavigationControllerDelegate,     UIImagePickerControllerDelegate {
func displayCameraControl() {
var imagePickerController = UIImagePickerController()
imagePickerController.delegate = self
imagePickerController.allowsEditing = true

if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera) {
  imagePickerController.sourceType = UIImagePickerControllerSourceType.Camera

  if UIImagePickerController.isCameraDeviceAvailable(UIImagePickerControllerCameraDevice.Front) {
    imagePickerController.cameraDevice = UIImagePickerControllerCameraDevice.Front
  } else {
    imagePickerController.cameraDevice = UIImagePickerControllerCameraDevice.Rear
  }
} else {
  imagePickerController.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
}

self.presentViewController(imagePickerController, animated: true, completion: nil)
}

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
}
}

可以在此处 (https://codeshare.io/UurWD) 第 111 行找到完整的代码块。

Answer 1

替换

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) { }

和

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) { }