ios - 检查按下了哪个 gestureRecognizer

Question

我将 gestureRecognizer 与 UIImageView 一起使用。我有两个 UIImageView。我需要在两个 UIImageView 中上传图片。为了打开 UIImagePickerController()，我在两个 UIImageView 上都使用了 gestureRecognizer。

所以我需要在 func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any])

的不同 UIImageView 上传图片

如何从库中上传图片？

这是我的代码:

@IBOutlet weak var mainPhotoImageView: UIImageView!
@IBOutlet weak var addImageView: UIImageView!

override func viewDidLoad() {
    super.viewDidLoad()

    configureGestureRecognizer()

}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    let chosenImage = info[UIImagePickerControllerEditedImage] as? UIImage
    if chosenImage != nil {
        logoImageView.image = chosenImage
        dismiss(animated: true, completion: nil)
    }
}

@objc func addLogoHall(_ sender: AnyObject) {
    let picker = UIImagePickerController()
    picker.delegate = self
    picker.allowsEditing = true
    picker.sourceType = .photoLibrary
    present(picker, animated: true, completion: nil)
}

@objc func addMainPhoto(_ sender: AnyObject) {
    let picker = UIImagePickerController()
    picker.delegate = self
    picker.allowsEditing = true
    picker.sourceType = .photoLibrary
    present(picker, animated: true, completion: nil)
}

func configureGestureRecognizer() {
    let addHallLogo = UITapGestureRecognizer(target: self, action: #selector(AddPhotoAndLogoViewController.addLogoHall(_:)))
    logoImageView.isUserInteractionEnabled = true
    logoImageView.addGestureRecognizer(addHallLogo)
    let addMainPhotoImage = UITapGestureRecognizer(target: self, action: #selector(AddPhotoAndLogoViewController.addMainPhoto(_:)))
    mainPhotoImageView.isUserInteractionEnabled = true
    mainPhotoImageView.addGestureRecognizer(addMainPhotoImage)
}

所以在 func imagePickerController 中，我需要检测使用了哪个 gestureRecognizer。或者也许有其他机会去做？

Answer 1

您可以像这样为选择器添加不同的标签:

@objc func addLogoHall(_ sender: AnyObject) {
    let picker = UIImagePickerController()
    picker.delegate = self
    picker.allowsEditing = true
    picker.sourceType = .photoLibrary
    picker.view.tag = 1
    present(picker, animated: true, completion: nil)
}

@objc func addMainPhoto(_ sender: AnyObject) {
    let picker = UIImagePickerController()
    picker.delegate = self
    picker.allowsEditing = true
    picker.view.tag = 2
    picker.sourceType = .photoLibrary
    present(picker, animated: true, completion: nil)
}

然后你可以像这样通过这个标签来识别:

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    let chosenImage = info[UIImagePickerControllerEditedImage] as? UIImage
    if chosenImage != nil {
       if(picker.view.tag == 1) {
          logoImageView.image = chosenImage
        } else {
          mainImageView.image = chosenImage
        }

        dismiss(animated: true, completion: nil)
    }
}