我如何允许用户从他们的苹果设备中选择图像？

Question

我是 swift 应用程序开发的新手，所以我正在学习苹果的食物追踪器教程。我试图让用户将图像设置为他们设备上的图像。我完全复制了他们的代码，但它给我一个错误

Cannot subscript a value of type '[String : AnyObject]' with an index of type 'UIImagePickerController.InfoKey'.

这是我的代码，如果您发现问题请告诉我。 p.s。抱歉代码格式，我不知道如何在堆栈上更改它。

 func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject ]){
    // The info dictionary may contain multiple representations of the image. You want to use the original.
        guard let selectedImage = info[ UIImagePickerControllerOriginalImage ] as? UIImage else {
            fatalError("Expected a dictionary containing an image, but was provided the following: \(info)")
        }
        // Set photoImageView to display the selected image.
        photoImageView.image = selectedImage
        // Dismiss the picker.
        dismiss(animated: true, completion: nil)
 }

Answer 1

在 Swift 4.2 中，delegate method 已更改为：

func imagePickerController(_ picker: UIImagePickerController, 
    didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])

并且 UIImagePickerControllerOriginalImage 已重命名为 UIImagePickerController.InfoKey.originalImage。

您应该更改您的方法签名和您使用的密钥名称。您的代码应该可以正常工作。

我如何允许用户从他们的苹果设备中选择图像？

How can I allow a user to pick an image from their apple device?

uiimagepickercontroller

ios

swift