没有为 UIImagePickerControllerDelegate 调用 didFinishPickingMediaWithInfo

Question

我正在尝试向我的 iOS 应用程序添加图片上传功能。我有一个函数 selectPicture()，当用户单击上传按钮时会调用该函数，然后会弹出一个警报，允许用户在相机和库之间进行选择。

func selectPicture() {
    let imagePicker = UIImagePickerController()
    imagePicker.delegate = self
    let alertController = UIAlertController(title: "Image Source", message: "Please choose your image source", preferredStyle: UIAlertControllerStyle.alert)
    let camera_action = UIAlertAction(title: "Camera", style: UIAlertActionStyle.default) {
        (_: UIAlertAction) -> Void in
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera) {
            print ("Camera Selected")
            imagePicker.sourceType = UIImagePickerControllerSourceType.camera
            imagePicker.allowsEditing = true
            imagePicker.modalTransitionStyle = UIModalTransitionStyle.coverVertical
            self.present(imagePicker, animated: true, completion: nil)
        }
    }
    let photoLibrary_action = UIAlertAction(title: "Photo Library", style: UIAlertActionStyle.default) {
        (_: UIAlertAction) -> Void in
        if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary) {
            print ("Photo Library Selected")
            
            imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary
            imagePicker.allowsEditing = true
            imagePicker.navigationBar.titleTextAttributes = self.navbarAttributes
            imagePicker.navigationBar.tintColor = UIColor.white
            imagePicker.navigationBar.isTranslucent = false
            imagePicker.navigationBar.barTintColor = PING_ORANGE
            imagePicker.navigationController?.title = "Pick Image"
            imagePicker.modalTransitionStyle = UIModalTransitionStyle.coverVertical
            self.present(imagePicker, animated: true, completion: nil)
        }
    }
    let cancel_action = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.default) {
        (_: UIAlertAction) -> Void in
        print ("Cancel Selected")
    }
    alertController.addAction(camera_action)
    alertController.addAction(photoLibrary_action)
    alertController.addAction(cancel_action)
    self.present(alertController, animated: true, completion: nil)
    
}

到目前为止一切正常，但是当我选择图像时，不会调用委托方法。

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any], editingInfo: [AnyHashable: Any]!) {
    let image = info[UIImagePickerControllerOriginalImage] as? UIImage
    print("Image Print")
    print(image)
    if image != nil {
        print ("INSIDE IMAGE DID FINISH PICKING")
        dismiss(animated: false) {
            self.uploadProfileImage(image: image!)
        }
        
    } else {
        dismiss(animated: false) {
            
        }
    }
}

我是 swift 新手，所以我可能会遗漏一些东西。谁能帮我解决这个问题？

谢谢。

Answer 1

您可能正在使用旧代码。你的method signature 是错误的。应该是：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
    if let image = info[.originalImage] as? UIImage {
        print("Image Print")
        print(image)
        dismiss(animated: false) {
            self.uploadProfileImage(image: image)
        }
    } else {
        dismiss(animated: false)
    }
}

Answer 2

我使用以下方法解决了这个问题：

func imagePickerController(_ picker: UIImagePickerController,
                           didFinishPickingMediaWithInfo info: [String : Any]) {
    if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
        dismiss(animated: false) {
            self.uploadProfileImage(image: image)
   
        }
    }
    else {
        dismiss(animated: false) {
        }
    }
}