Swift 4.2 imagePickerController问题

试图将聊天客户端从 swift 4传递到 swift 4.2并且使用选择器我发现了麻烦.

UIImagePickerControllerEditedImage //无法使用索引类型为“UIImagePickerController.InfoKey”的类型'[String：Any]’下标

func imagePickerController(_ picker: UIImagePickerController,didFinishPickingMediawithInfo info: [String : Any]) {

    if let pickedImage = info[UIImagePickerControllerEditedImage] as? UIImage {
        self.userProfileImage.contentMode = .scaleAspectFit
        self.userProfileImage.image = pickedImage
    }

    picker.dismiss(animated: true,completion: nil)
}

解决方法

方法签名已更改为

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

您应该看到func名称的警告消息

Instance method
‘imagePickerController(:didFinishPickingMediawithInfo:)’ nearly
matches optional requirement
‘imagePickerController(:didFinishPickingMediawithInfo:)’ of protocol
‘UIImagePickerControllerDelegate’

Candidate has non-matching type ‘(UIImagePickerController,[String :
Any]) -> ()’

Move ‘imagePickerController(_:didFinishPickingMediawithInfo:)’ to
another extension to silence this warning

Make ‘imagePickerController(_:didFinishPickingMediawithInfo:)’ private
to silence this warning

Requirement ‘imagePickerController(_:didFinishPickingMediawithInfo:)’ declared here (UIKit.UIImagePickerControllerDelegate)