问题描述
我目前有一个子视图，它创建并添加到ViewDidLoad（）中的UIView中。我正在尝试使用UIGestureRecognizers来检测点击并取消隐藏特定按钮。我当前的代码：
I currently have a subview that is created and added to the UIView in ViewDidLoad(). I am attempting to user UIGestureRecognizers to detect a tap and unhide a particular button. My current code:
override func viewDidLoad() {
super.viewDidLoad()
architectView = CustomClass(frame: self.view.bounds)
self.view.addSubview(architectView)
let gestureRecognizer = UITapGestureRecognizer(target: self, action: "handleTap:")
gestureRecognizer.delegate = self
architectView.addGestureRecognizer(gestureRecognizer)
}
func handleTap(gestureRecognizer: UIGestureRecognizer) {
let alert = UIAlertController(title: "Alert", message: "Message", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Click", style: UIAlertActionStyle.Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)
}
handleTap（）函数是一个简单的测试，看看是否水龙头被认可。按下时，此代码不会触发UIAlert？我错过了什么？
The handleTap() function is a simple test to see if the taps are being recognized. This code does not trigger the UIAlert when it is pressed? What am I missing?
推荐答案
我在这里测试了你的代码，它确实有效。但是，我认为您可能会错过将 UIGestureRecognizerDelegate 协议添加到View Controller。见下文：
I tested your code here and it does work. However, I think you might be missing to add the UIGestureRecognizerDelegate protocol to your View Controller. See below:
class ViewController: UIViewController, UIGestureRecognizerDelegate {
var architectView = UIView()
override func viewDidLoad() {
super.viewDidLoad()
architectView = UIView(frame: self.view.bounds)
self.view.addSubview(architectView)
let gestureRecognizer = UITapGestureRecognizer(target: self, action: "handleTap:")
gestureRecognizer.delegate = self
architectView.addGestureRecognizer(gestureRecognizer)
}
func handleTap(gestureRecognizer: UIGestureRecognizer) {
let alert = UIAlertController(title: "Alert", message: "Message", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Click", style: UIAlertActionStyle.Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
这篇关于在Swift中以编程方式将UIGestureRecognizer添加到Subview的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！