如何识别调用了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 个点击手势，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中拖动并放置在我的 ImageView 上。

故事板 - 代码

我的应用程序有艺术家、专辑和歌曲列表，当点击一首歌曲时，应用程序会移至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，用户可以点击它们以从库中选择 select 图像来创建新歌曲。

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

不胜感激！！

Answer 1

从情节提要中向两个 UIImageView 添加标签。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)
}

将所选标签存储在一个变量中。
现在您可以使用 selectedTag 变量

Answer 2

首先在图像上应用点击手势时设置标签。

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
  }
}

如何识别调用了哪个点击手势识别器？

how to identify which tap gesture recognizer is called?

xcode

uiimageview

ios

uitapgesturerecognizer

swift