无法在UITapGestureRecognizer中传递UIImageView

Question

我正在尝试通过UIImageView将UITapGestureRecognizer作为参数传递给我，例如addTapGestureRecognizer(passedView: questionImage)其中questionImage是UIImageView。代码如下：

    // MARK: Tap Gesture Recognizer

    func addTapGestureRecognizer(passedView: UIView) {
        let photoTapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(didTapPhoto(_:)))
        photoTapGestureRecognizer.numberOfTapsRequired = 1
        passedView.isUserInteractionEnabled = true
        passedView.addGestureRecognizer(photoTapGestureRecognizer)

    }

    func didTapPhoto(_ sender: UITapGestureRecognizer) {
        print("Did detect the tap")
        if let imageView = sender as? UIImageView {
            print("Is an image view")
        }

    }

当我点击UIImageView时，它会检测到水龙头并打印第一个语句。但是，它不会将sender转换为UIImageView并打印第二个语句。我在这里做错了什么？

Answer 1

您需要传递sender.view才能获得点击的视图

func didTapPhoto(_ sender: UITapGestureRecognizer) {
    print("Did detect the tap")
    if (sender.view as? UIImageView) != nil {
        print("Is an image view")
    }

}

Answer 2

if let imageView = sender.view as? UIImageView {
        print("Is an image view")
    }