ios - 如何更改 UIview 的边框颜色？

Question

我想在按下时更改 uiview 的边框颜色，并在释放后返回正常的边框颜色。这样做的最佳做法是什么？

类似于下图:

Answer 1

不要使用 UITapGestureRecognizer。您可以使用 UILongPressGestureRecognizer

代码:

   override func viewDidLoad() {
    super.viewDidLoad()

    let view = UIView.init(frame: CGRect.init(x: 30, y: 200, width: 100, height: 40))
    self.view.addSubview(view)
    view.layer.borderColor = UIColor.black.cgColor
    view.layer.borderWidth = 3
    let tapForView = UILongPressGestureRecognizer(target: self, action: #selector(self.toChangeColor(recognizer:)))
    tapForView.minimumPressDuration = 0.01
    view.isUserInteractionEnabled = true
    view.addGestureRecognizer(tapForView)
}

@objc func toChangeColor(recognizer:UILongPressGestureRecognizer)
{
    // Apply logic for changing background color.
    let view = recognizer.view
    if recognizer.state == .began {
        view?.layer.borderColor = UIColor.orange.cgColor
        print("view began")
    }
    else if recognizer.state == .ended {
        view?.layer.borderColor = UIColor.black.cgColor
        print("view ended")

    }

}

这将完美地工作。