如何识别调用哪个点击手势识别器？

Question

我有2个UIImageView，名为“artistImage”和“albumImage”，每个包含1个轻击手势，所有手势都连接到1个@IBAction，名为“artistImageTap”。这些点击手势是从对象库拖动并放在我的ImageView上。

故事板 - 代码

我的应用程序有一个艺术家，专辑和歌曲的列表，当点击一首歌时，应用程序移动到此视图并显示其详细信息。如果我单击添加按钮，应用程序将移动到此视图，但这次所有文本字段都是可编辑的，图像是默认的，用户可以点击它们从库中选择图像来创建新歌。

我的问题是我不知道如何识别哪个UIImageView被点击。正如你在图片中看到的那样，我尝试了picker.restorationIdentifier，但它总是返回nil。

@IBAction func artistImageTap(_ sender: UITapGestureRecognizer) {
    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)
}

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

    // 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.
    if picker.restorationIdentifier == "artistImage" {
        artistImage.image = selectedImage
    } else {
        albumImage.image = selectedImage
    }
    // Dismiss the picker.
    dismiss(animated: true, completion: nil)
}

感谢每一位帮助!!

Answer 1

• 从故事板向两个UIImageView添加标记。 像artistImage = 1001和albumImage = 1002

  @IBAction func artistImageTap(_ sender: UITapGestureRecognizer) {
  
  if sender.view?.tag == 1001 {
  
      selectedTag = 1001
  
  } else if sender.view?.tag == 1002 {
  
     selectedTag = 1002
  
  }
  
  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)
  } 
  

• 将选定的标签存储在一个变量中。

• 现在，您可以查看用户使用selectedTag变量点击的图片用户

Answer 2

首先，当您将图像应用于图像时，为手势设置标记。

tapGestureArtistImage.tag = 0;
tapGestureAlbumImage.tag = 1;

然后在artistImageTap方法

中将点击手势作为参数发送

- (void) artistImageTap:(UITapGestureRecognizer*)sender
{
  if(sender.tag == 0)
  {
    // artistImage tapped
  }
  else if (sender.tag == 1)
  {
    // albumImage tapped
  }
}