Swift 3照片库

Question

我刚刚更新到Swift 3，我试图运行此代码

    @IBAction func selectProfilePhoto(_ sender: AnyObject) {

    imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary
    imagePicker.mediaTypes = [kUTTypeImage as String]
    self.present(imagePicker, animated: true, completion: nil)
}

当我运行此代码时，它只是崩溃了！