[英]how to identify which tap gesture recognizer is called?
我有2个UIImageView,分别名为“ artistImage”和“ albumImage”,每个UIImageView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中拖动并放置在我的ImageView上的。
我的应用程序具有艺术家,专辑和歌曲的列表,当点击歌曲时,该应用程序将移至该视图并显示其详细信息。 如果单击添加按钮,应用程序将移至该视图,但是这次所有文本字段都是可编辑的,图像为默认图像,用户可以点击它们从库中选择图像以创建新歌曲。
我的问题是我不知道如何识别哪个UIImageView被点击。 如您在图片中看到的,我尝试了picker.restorationIdentifier,但它始终返回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)
}
感谢您的帮助!!
从故事板向两个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。
现在您可以检查哪个图像用户点击了selectedTag
变量
首先,将其应用到图像时,为点击手势设置标签。
tapGestureArtistImage.tag = 0;
tapGestureAlbumImage.tag = 1;
然后在artistImageTap
方法中将artistImageTap
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
}
}
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