问Xcode开发，获取编辑后的图片要怎么解？

我是这样写的

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

//获取编辑后的图片

avaImg.image = info [UIImagePickerControllerEditedImage] as? UIImage

然后提示我：Cannot subscript a value of type '[String : Any]' with an index of type 'UIImagePickerController.InfoKey'

请问要怎么解？