Swift 手势识别器对点击没有响应

我是新手 学习苹果公司的教程

我做任何事都是当向导的。我知道它已经过时了。 但为什么手势识别器不响应点击

我在“启用用户交互”中添加了一个复选标记

告诉我在这段代码中要修复什么，以便手势识别器对点击做出响应

    //MARK: UIImagePickerControllerDelegate
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        
        // The info dictionary may contain multiple representations of the image. You want to use the original.
        guard let selectedImage = info[.originalImage] 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)
    }

    // MARK: Actions
    
    @IBAction func selectImageFromPhotoLibrary(_ sender: UITapGestureRecognizer) {
        
        // Hide the keyboard.
        nameTextField.resignFirstResponder()
        
        // UIImagePickerController is a view controller that lets a user pick media from their photo library.
        let imagePickerController = UIImagePickerController()
        
        // Only allow photos to be picked, not taken.
        imagePickerController.sourceType = .photoLibrary
        
        // Make sure ViewController is notified when the user picks an image.
        imagePickerController.delegate = self
        present(imagePickerController, animated: true, completion: nil)
    }
    
} 

---

您可能没有/丢失与

@iAction

的连接。你需要再次连接它。从情节提要中找到

UIAppgestureRecognitizer

，并将控件拖动到

UIViewController

子类中，再次创建操作，在其中添加代码并删除旧方法

在情节提要中找到点击手势，并控制从中拖动到

UIViewController

在

ViewController

您也可以通过编程方式来完成。以下是方法：

override func viewDidLoad() {
    super.viewDidLoad()

    tappableView.isUserInteractionEnabled = true
    let tapGesture = UITapGestureRecognizer(target: self, action: #selector(selectImageFromPhotoLibrary(_:)))
    tappableView.addGestureRecognizer(tapGesture)
}