如何以编程方式快速调用UIView上的手势点击

我有一个UIView，并向其中添加了点击手势：

let tap = UITapGestureRecognizer(target: self, action: Selector("handleTap:"))
tap.delegate = self
myView.addGesture(tap)

我试图在测试文件中以编程方式调用它。

sendActionForEvent

我正在使用此功能，但无法正常工作：

myView.sendActionForEvent(UIEvents.touchUpDown)

它显示了无法识别的选择器发送到实例。

我怎么解决这个问题？

您需要UITapGestureRecognizer使用目标和操作进行初始化，如下所示：

let tap = UITapGestureRecognizer(target: self, action: #selector(self.handleTap(_:)))
myView.addGestureRecognizer(tap)

然后，您应该实现处理程序，该处理程序将在每次点击事件发生时被调用：

@objc func handleTap(_ sender: UITapGestureRecognizer? = nil) {
    // handling code
}

因此，现在调用轻击手势识别器事件处理程序就像调用方法一样简单：

handleTap()

对于正在寻找Swift 3解决方案的任何人

let tap = UITapGestureRecognizer(target: self, action: #selector(self.handleTap(_:)))

view.addGestureRecognizer(tap)

view.isUserInteractionEnabled = true

self.view.addSubview(view)

// function which is triggered when handleTap is called
 func handleTap(_ sender: UITapGestureRecognizer) {
     print("Hello World")
  }

对于Swift 4：

let tap = UITapGestureRecognizer(target: self, action: #selector(self.handleTap(_:)))

view.addGestureRecognizer(tap)

view.isUserInteractionEnabled = true

self.view.addSubview(view)

// function which is triggered when handleTap is called
@objc func handleTap(_ sender: UITapGestureRecognizer) {
    print("Hello World")
}

在Swift 4中，您需要明确指出触发的函数可以从Objective-C调用，因此您还需要在handleTap函数中添加@objc。

在这里查看@Ali Beadle的答案：Swift 4添加手势：覆盖vs @objc

仅需注意-不要忘记在视图上启用交互：

let tap = UITapGestureRecognizer(target: self, action: #selector(handleTap))

view.addGestureRecognizer(tap)

// view.userInteractionEnabled = true

self.view.addSubview(view)

第1步

@IBOutlet var viewTap: UIView!

第2步

var tapGesture = UITapGestureRecognizer()

步骤：3

override func viewDidLoad() {
    super.viewDidLoad()
    // TAP Gesture
    tapGesture = UITapGestureRecognizer(target: self, action: #selector(ViewController.myviewTapped(_:)))
    tapGesture.numberOfTapsRequired = 1
    tapGesture.numberOfTouchesRequired = 1
    viewTap.addGestureRecognizer(tapGesture)
    viewTap.isUserInteractionEnabled = true
}

第4步

func myviewTapped(_ sender: UITapGestureRecognizer) {

    if self.viewTap.backgroundColor == UIColor.yellow {
        self.viewTap.backgroundColor = UIColor.green
    }else{
        self.viewTap.backgroundColor = UIColor.yellow
    }
}

输出值

实施轻击手势

let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "touchHappen") 
view.userInteractionEnabled = true
view.addGestureRecognizer(tap)

识别到轻拍时调用此函数。

func touchHappen() {
    //Causes the view (or one of its embedded text fields) to resign the first responder status.
    self.view.endEditing(true)
}

对于Swift 3的更新

let tap = UITapGestureRecognizer(target: self, action: #selector(self.touchHappen(_:)))
view.addGestureRecognizer(tap)
view.userInteractionEnabled = true

func touchHappen(_ sender: UITapGestureRecognizer) {
    print("Hello Museer")
}

斯威夫特4

let tap = UITapGestureRecognizer(target: self, action: #selector(self.touchTapped(_:)))
    self.view.addGestureRecognizer(tap)

@objc func touchTapped(_ sender: UITapGestureRecognizer) {
}

这就是它在Swift 3中的工作方式：

@IBOutlet var myView: UIView!
override func viewDidLoad() {
    super.viewDidLoad()

    let tap = UITapGestureRecognizer(target: self, action:#selector(handleTap))

    myView.addGestureRecognizer(tap)
}

func handleTap() {
    print("tapped")
}

Swift 4的完整答案

步骤1：为视图创建出口

@IBOutlet weak var rightViewOutlet: UIView!

步骤2：定义轻击手势

var tapGesture = UITapGestureRecognizer()

步骤3：创建ObjC函数（在点击视图时调用）

@objc func rightViewTapped(_ recognizer: UIGestureRecognizer) {
    print("Right button is tapped")
}

步骤4：在viewDidLoad（）中添加以下内容

let rightTap = UITapGestureRecognizer(target: self, action: #selector(ViewController.rightViewTapped(_:)))
    rightViewOutlet.addGestureRecognizer(rightTap)

Swift 5.1 示例的三个视图

步骤1- >添加Storyboard视图并添加Outlet ViewController UIView

@IBOutlet var firstView: UIView!
@IBOutlet var secondView: UIView!
@IBOutlet var thirdView: UIView!

步骤2- >添加storyBoard视图标签

步骤3- >添加手势

override func viewDidLoad() {
        super.viewDidLoad()

        firstView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.tap(_:))))
        firstView.isUserInteractionEnabled = true
        secondView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.tap(_:))))
        secondView.isUserInteractionEnabled = true
        thirdView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.tap(_:))))
        thirdView.isUserInteractionEnabled = true
    }

步骤4- >选择视图

@objc func tap(_ gestureRecognizer: UITapGestureRecognizer) {
        let tag = gestureRecognizer.view?.tag
        switch tag! {
        case 1 :
            print("select first view")
        case 2 :
            print("select second view")
        case 3 :
            print("select third view")
        default:
            print("default")
        }
    }

我很快就研究了Xcode 6.4。见下文。

var view1: UIView!

func assignTapToView1() {          
  let tap = UITapGestureRecognizer(target: self, action: Selector("handleTap"))
  //  tap.delegate = self
  view1.addGestureRecognizer(tap)
  self.view .addSubview(view1)

...
}

func handleTap() {
 print("tap working")
 view1.removeFromSuperview()
 // view1.alpha = 0.1
}

如果要在下面给出目标C代码，

UITapGestureRecognizer *gesRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)]; // Declare the Gesture.
gesRecognizer.delegate = self;
[yourView addGestureRecognizer:gesRecognizer]; // Add Gesture to your view.

// Declare the Gesture Recognizer handler method.

- (void)handleTap:(UITapGestureRecognizer *)gestureRecognizer{
   NSLog(@"Tapped");
}

或者您想在下面给出快速代码，

import UIKit
class ViewController: UIViewController {

    @IBOutlet weak var myView: UIView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Add tap gesture recognizer to view
        let tapGesture = UITapGestureRecognizer(target: self, action: Selector("handleTap:"))
        myView.addGestureRecognizer(tapGesture)
    }

    // this method is called when a tap is recognized
    func handleTap(sender: UITapGestureRecognizer) {

        print("tap")
    }
}

您需要使用目标和操作来初始化UITapGestureRecognizer，如下所示：

let tap = UITapGestureRecognizer(target: self, action: "handleTap:")
tap.delegate = self
myView.addGestureRecognizer(tap)

然后，您应该实现处理程序，该处理程序将在每次点击事件发生时被调用：

func handleTap(sender: UITapGestureRecognizer) {
  // handling code
}

    let tap = UITapGestureRecognizer(target: self, action: Selector("handleFrontTap:"))
    frontView.addGestureRecognizer(tap)

// Make sure this is not private
func handleFrontTap(gestureRecognizer: UITapGestureRecognizer) {
    print("tap working")
}

斯威夫特4

首先，创建一个UITapGestureRecognizer对象

var tapGesture = UITapGestureRecognizer()

第二步是初始化UITapGestureReconizer。启用用户交互，然后添加它。

override func viewDidLoad() {
        super.viewDidLoad()
    tapGesture = UITapGestureRecognizer(target: self, action: #selector(YourViewController.myviewTapped(_:)))
            infosView.isUserInteractionEnabled = true
            infosView.addGestureRecognizer(tapGesture)
view.addSubview(infosView)
}

三，创建方法

@objc func myviewTapped(_ recognizer: UIGestureRecognizer) {
                print("button is tapped")
            }

尝试以下扩展

    extension UIView {

    func  addTapGesture(action : @escaping ()->Void ){
        let tap = MyTapGestureRecognizer(target: self , action: #selector(self.handleTap(_:)))
        tap.action = action
        tap.numberOfTapsRequired = 1

        self.addGestureRecognizer(tap)
        self.isUserInteractionEnabled = true

    }
    @objc func handleTap(_ sender: MyTapGestureRecognizer) {
        sender.action!()
    }
}

class MyTapGestureRecognizer: UITapGestureRecognizer {
    var action : (()->Void)? = nil
}

然后使用它：

submitBtn.addTapGesture {
     //your code
}

你甚至可以将它用于细胞

cell.addTapGesture {
     //your code
}

我在Swift 2.2上研究了Xcode 7.3.1。见下文。

func addTapGesture() {
    let tap = UITapGestureRecognizer(target: self, action: #selector(MyViewController.handleTap))
    tap.numberOfTapsRequired = 1
    self.myView.addGestureRecognizer(tap)
}

func handleTap() {
    // Your code here...
}

我想指出两点，这些问题一直困扰着我。

• 我在init上创建了Gesture Recognizer，并将其存储在let属性中。显然，将此手势Recog添加到视图中不起作用。可能是自身对象在初始化期间传递给了手势识别器，但配置不正确。
• 手势识别器不应添加到零帧的视图中。我使用零帧创建所有视图，然后使用自动布局调整它们的大小。在自动布局引擎调整视图大小之后，必须添加手势识别器。因此，我在viewDidAppear中添加了手势识别器，它们可以正常工作。

xCode 9.3，Swift 4.0

class BaseVC: UIViewController, UIGestureRecognizerDelegate { 

      @IBOutlet weak var iView: UIView!

      override func viewDidLoad() {
          super.viewDidLoad()
          let clickUITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.onSelect(_:)))
          clickUITapGestureRecognizer.delegate = self
          iView?.addGestureRecognizer(tap)
      }

      func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
          return true
      }


     @IBAction func onSelect(_ sender: Any) {

     }
}

内部ViewDidLoad

let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(imageTapped(tapGestureRecognizer:)))
    self.imgMainAdView.isUserInteractionEnabled = true
    self.imgMainAdView.addGestureRecognizer(tapGestureRecognizer)

//MARK: - Image Tap Method -
@objc func imageTapped(tapGestureRecognizer: UITapGestureRecognizer)
{
    print("Tapped")
    if let url = URL(string: self.strMAinAdvLink)
    {
        UIApplication.shared.open(url, options: [:])
    }
}

通话目的

@IBAction func btnCall1Action(_ sender: Any)
{
    let text = self.strPhoneNumber1!
    let test = String(text.filter { !" -()".contains($0) })
    UIApplication.shared.openURL(NSURL(string: "tel://\(test)")! as URL)
}

邮件目的

MFMailComposeViewControllerDelegate

 @IBAction func btnMailAction(_ sender: Any)
{
    let strEmail = SAFESTRING(str:  (self.dictEventDetails?.value(forKeyPath: "Email.value_text.email") as! String))

    if !MFMailComposeViewController.canSendMail()
    {
        AppDelegate.sharedInstance().showAlertAction(strTitle: "OK", strMessage: "Mail services are not available") { (success) in
        }
        return
    }
    let composeVC = MFMailComposeViewController()
    composeVC.mailComposeDelegate = self
    composeVC.setToRecipients([strEmail])
    composeVC.setSubject("")
    composeVC.setMessageBody("", isHTML: false)
    self.present(composeVC, animated: true, completion: nil)
}
func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?)
{
    controller.dismiss(animated: true, completion: nil)
}

这是在Swift 5的 View上添加手势的最简单方法

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        addGestures()
    }

    // MARK: Add Gestures to target view
    func addGestures()
    {
        // 1. Single Tap or Touch
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.tapGetstureDetected))
        tapGesture.numberOfTapsRequired = 1
        view.addGestureRecognizer(tapGesture)

        //2. Double Tap
        let doubleTapGesture = UITapGestureRecognizer(target: self, action: #selector(self.doubleTapGestureDetected))
        doubleTapGesture.numberOfTapsRequired = 2
        view.addGestureRecognizer(doubleTapGesture)

        //3. Swipe
        let swipeGesture = UISwipeGestureRecognizer(target: self, action: #selector(self.swipeGetstureDetected))
        view.addGestureRecognizer(swipeGesture)

        //4. Pinch
        let pinchGesture = UIPinchGestureRecognizer(target: self, action: #selector(self.pinchGetstureDetected))
        view.addGestureRecognizer(pinchGesture)

        //5. Long Press
        let longPressGesture = UILongPressGestureRecognizer(target: self, action: #selector(self.longPressGetstureDetected))
        view.addGestureRecognizer(longPressGesture)

        //6. Pan
        let panGesture = UILongPressGestureRecognizer(target: self, action: #selector(self.panGestureDetected))
        view.addGestureRecognizer(panGesture)

    }

    // MARK: Handle Gesture detection
    @objc func swipeGetstureDetected() {
        print("Swipe Gesture detected!!")
    }

    @objc func tapGetstureDetected() {
        print("Touch/Tap Gesture detected!!")
    }

    @objc func pinchGetstureDetected() {
        print("Pinch Gesture detected!!")
    }

    @objc func longPressGetstureDetected() {
        print("Long Press Gesture detected!!")
    }

    @objc func doubleTapGestureDetected() {
        print("Double Tap Gesture detected!!")
    }

    @objc func panGestureDetected()
    {
        print("Pan Gesture detected!!")
    }


    //MARK: Shake Gesture
    override func becomeFirstResponder() -> Bool {
        return true
    }
    override func motionEnded(_ motion: UIEvent.EventSubtype, with event: UIEvent?){
        if motion == .motionShake
        {
            print("Shake Gesture Detected")
        }
    }
}

尝试以下快速代码（在Xcode 6.3.1中进行了测试）：

    import UIKit

    class KEUITapGesture150427 : UIViewController {
      var _myTap: UITapGestureRecognizer?
      var _myView: UIView?

      override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = UIColor.whiteColor();

        _myTap = UITapGestureRecognizer(target: self
, action: Selector("_myHandleTap:"))
        _myTap!.numberOfTapsRequired = 1

        _myView = UIView(frame: CGRectMake(100, 200, 100, 100))
        _myView!.backgroundColor=UIColor.blueColor()
        _myView!.layer.cornerRadius = 20
        _myView!.layer.borderWidth = 1
        _myView!.addGestureRecognizer(_myTap!)
        view.addSubview(_myView!)
      }

      func _myHandleTap(sender: UITapGestureRecognizer) {
        if sender.state == .Ended {
          println("_myHandleTap(sender.state == .Ended)")
          sender.view!.backgroundColor
          = UIColor(red: CGFloat(drand48()), green: CGFloat(drand48()), blue: CGFloat(drand48()), alpha: 1.0);
        }
      }
    }

请注意，您的目标可以是UIResponder的任何子类，请参见（在Xcode 6.3.1中进行了测试）：

    import UIKit

    class MyTapTarget  : UIResponder {
      func _myHandleTap2(sender: UITapGestureRecognizer) {
        if sender.state == .Ended {
          println("_myHandleTap2(sender.state == .Ended)")
          sender.view!.backgroundColor
            = UIColor(red: CGFloat(drand48()), green: CGFloat(drand48()), blue: CGFloat(drand48()), alpha: 1.0);
        }
      }
    }

    class KEUITapGesture150427b : UIViewController {
      var _myTap: UITapGestureRecognizer?
      var _myView: UIView?
      var _myTapTarget: MyTapTarget?

      override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = UIColor.whiteColor();

        _myTapTarget = MyTapTarget()
        _myTap = UITapGestureRecognizer(target: _myTapTarget!
, action: Selector("_myHandleTap2:"))
        _myTap!.numberOfTapsRequired = 1

        _myView = UIView(frame: CGRectMake(100, 200, 100, 100))
        _myView!.backgroundColor=UIColor.blueColor()
        _myView!.layer.cornerRadius = 20
        _myView!.layer.borderWidth = 1
        _myView!.addGestureRecognizer(_myTap!)
        view.addSubview(_myView!)
      }
    }

您可以直接调用该handleTap函数，而不必调用myView的UITapGestureRecognizer ，