在Swift中以编程方式添加UIGestureRecognizer子视图

我目前有一个子视图创build并添加到ViewDidLoad（）中的UIView。 我正在尝试使用UIGestureRecognizers来检测一个水龙头，并取消隐藏一个特定的button。 我目前的代码：

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testing，看看是否被认可的水龙头。 这个代码在按下时不会触发UIAlert？ 我错过了什么？

Answer 1

我在这里testing了你的代码，它确实工作。 不过，我想你可能会缺less将UIGestureRecognizerDelegate协议添加到您的视图控制器。 见下文：

 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. } } 

Answer 2

Swift 3基于Raphael Silva的版本代码答案：

 import UIKit 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: #selector(ViewController.handleTap(gestureRecognizer:))) 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.present(alert, animated: true, completion: nil) } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } }