如何向UIView添加触摸事件？
我尝试：

UIView *headerView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.bounds.size.width, nextY)] autorelease];
[headerView addTarget:self action:@selector(myEvent:) forControlEvents:UIControlEventTouchDown];
// ERROR MESSAGE: UIView may not respond to '-addTarget:action:forControlEvents:'

我不想创建子类和覆盖

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

13 回答

5

创建一个手势识别器（子类），它将实现触摸事件，如 touchesBegan . 之后您可以将其添加到视图中 .

这样你就可以使用组合代替子类化（这是请求） .

回复于 2024-04-27T07:21:45+08:00

在iOS 3.2及更高版本中，您可以使用手势识别器 . 例如，这是您处理点击事件的方式：

//The setup code (in viewDidLoad in your view controller)
UITapGestureRecognizer *singleFingerTap = 
  [[UITapGestureRecognizer alloc] initWithTarget:self 
                                          action:@selector(handleSingleTap:)];
[self.view addGestureRecognizer:singleFingerTap];

//The event handling method
- (void)handleSingleTap:(UITapGestureRecognizer *)recognizer
{
  CGPoint location = [recognizer locationInView:[recognizer.view superview]];

  //Do stuff here...
}

还有一堆内置手势 . 查看iOS事件处理的文档和 UIGestureRecognizer . 我在github上也有一堆可能有用的示例代码 .

回复于 2024-04-27T07:21:45+08:00

手势识别器

当您向视图添加Gesture Recognizer时，可以通知许多常用的触摸事件（或手势） . 默认情况下支持以下手势类型：

UITapGestureRecognizer Tap （短暂触摸屏幕一次或多次）
UILongPressGestureRecognizer Long touch （长时间触摸屏幕）
UIPanGestureRecognizer Pan （在屏幕上移动手指）
UISwipeGestureRecognizer Swipe （快速移动手指）
UIPinchGestureRecognizer Pinch （将两根手指放在一起或分开 - 通常是放大）
UIRotationGestureRecognizer Rotate （沿圆周方向移动两根手指）

除此之外，您还可以制作自己的自定义手势识别器 .

在Interface Builder中添加手势

将手势识别器从对象库拖到视图上 .

enter image description here

控制从文档大纲中的手势拖动到View Controller代码，以便制作插座和操作 .

enter image description here

这应该默认设置，但也要确保视图的 User Action Enabled 设置为true .

enter image description here

以编程方式添加手势

要以编程方式添加手势，您（1）创建手势识别器，（2）将其添加到视图中，以及（3）创建在识别手势时调用的方法 .

import UIKit
class ViewController: UIViewController {

    @IBOutlet weak var myView: UIView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // 1. create a gesture recognizer (tap gesture)
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(sender:)))

        // 2. add the gesture recognizer to a view
        myView.addGestureRecognizer(tapGesture)
    }

    // 3. this method is called when a tap is recognized
    @objc func handleTap(sender: UITapGestureRecognizer) {
        print("tap")
    }
}

Notes

sender 参数是可选的 . 如果您不需要对手势的引用，则可以将其保留 . 但是，如果这样做，请删除操作方法名称后面的 (sender:) .
handleTap 方法的命名是任意的 . 使用 action: #selector(someMethodName(sender:)) 将其命名为您想要的任何名称 .

更多例子

您可以研究我添加到这些视图中的手势识别器，以了解它们的工作原理 .

enter image description here

以下是该项目的代码：

import UIKit
class ViewController: UIViewController {

    @IBOutlet weak var tapView: UIView!
    @IBOutlet weak var doubleTapView: UIView!
    @IBOutlet weak var longPressView: UIView!
    @IBOutlet weak var panView: UIView!
    @IBOutlet weak var swipeView: UIView!
    @IBOutlet weak var pinchView: UIView!
    @IBOutlet weak var rotateView: UIView!
    @IBOutlet weak var label: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Tap
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap))
        tapView.addGestureRecognizer(tapGesture)

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

        // Long Press
        let longPressGesture = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress(gesture:)))
        longPressView.addGestureRecognizer(longPressGesture)

        // Pan
        let panGesture = UIPanGestureRecognizer(target: self, action: #selector(handlePan(gesture:)))
        panView.addGestureRecognizer(panGesture)

        // Swipe (right and left)
        let swipeRightGesture = UISwipeGestureRecognizer(target: self, action: #selector(handleSwipe(gesture:)))
        let swipeLeftGesture = UISwipeGestureRecognizer(target: self, action: #selector(handleSwipe(gesture:)))
        swipeRightGesture.direction = UISwipeGestureRecognizerDirection.right
        swipeLeftGesture.direction = UISwipeGestureRecognizerDirection.left
        swipeView.addGestureRecognizer(swipeRightGesture)
        swipeView.addGestureRecognizer(swipeLeftGesture)

        // Pinch
        let pinchGesture = UIPinchGestureRecognizer(target: self, action: #selector(handlePinch(gesture:)))
        pinchView.addGestureRecognizer(pinchGesture)

        // Rotate
        let rotateGesture = UIRotationGestureRecognizer(target: self, action: #selector(handleRotate(gesture:)))
        rotateView.addGestureRecognizer(rotateGesture)

    }

    // Tap action
    @objc func handleTap() {
        label.text = "Tap recognized"

        // example task: change background color
        if tapView.backgroundColor == UIColor.blue {
            tapView.backgroundColor = UIColor.red
        } else {
            tapView.backgroundColor = UIColor.blue
        }

    }

    // Double tap action
    @objc func handleDoubleTap() {
        label.text = "Double tap recognized"

        // example task: change background color
        if doubleTapView.backgroundColor == UIColor.yellow {
            doubleTapView.backgroundColor = UIColor.green
        } else {
            doubleTapView.backgroundColor = UIColor.yellow
        }
    }

    // Long press action
    @objc func handleLongPress(gesture: UILongPressGestureRecognizer) {
        label.text = "Long press recognized"

        // example task: show an alert
        if gesture.state == UIGestureRecognizerState.began {
            let alert = UIAlertController(title: "Long Press", message: "Can I help you?", preferredStyle: UIAlertControllerStyle.alert)
            alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
            self.present(alert, animated: true, completion: nil)
        }
    }

    // Pan action
    @objc func handlePan(gesture: UIPanGestureRecognizer) {
        label.text = "Pan recognized"

        // example task: drag view
        let location = gesture.location(in: view) // root view
        panView.center = location
    }

    // Swipe action
    @objc func handleSwipe(gesture: UISwipeGestureRecognizer) {
        label.text = "Swipe recognized"

        // example task: animate view off screen
        let originalLocation = swipeView.center
        if gesture.direction == UISwipeGestureRecognizerDirection.right {
            UIView.animate(withDuration: 0.5, animations: {
                self.swipeView.center.x += self.view.bounds.width
            }, completion: { (value: Bool) in
                self.swipeView.center = originalLocation
            })
        } else if gesture.direction == UISwipeGestureRecognizerDirection.left {
            UIView.animate(withDuration: 0.5, animations: {
                self.swipeView.center.x -= self.view.bounds.width
            }, completion: { (value: Bool) in
                self.swipeView.center = originalLocation
            })
        }
    }

    // Pinch action
    @objc func handlePinch(gesture: UIPinchGestureRecognizer) {
        label.text = "Pinch recognized"

        if gesture.state == UIGestureRecognizerState.changed {
            let transform = CGAffineTransform(scaleX: gesture.scale, y: gesture.scale)
            pinchView.transform = transform
        }
    }

    // Rotate action
    @objc func handleRotate(gesture: UIRotationGestureRecognizer) {
        label.text = "Rotate recognized"

        if gesture.state == UIGestureRecognizerState.changed {
            let transform = CGAffineTransform(rotationAngle: gesture.rotation)
            rotateView.transform = transform
        }
    }
}

Notes

您可以向单个视图添加多个手势识别器 . 但是为了简单起见，我没有这样做（滑动手势除外） . 如果您需要为您的项目，您应该阅读gesture recognizer documentation . 这是相当容易理解和有帮助的 .
上述示例的已知问题：（1）平移视图在下一个手势事件中重置其帧 . （2）第一次滑动时滑动视图来自错误的方向 . （不过，我的示例中的这些错误不应影响您对手势识别器如何工作的理解 . ）

回复于 2024-04-27T07:21:45+08:00

我想你可以简单地使用

UIControl *headerView = ...
[headerView addTarget:self action:@selector(myEvent:) forControlEvents:UIControlEventTouchDown];

我的意思是headerView从UIControl扩展 .

回复于 2024-04-27T07:21:45+08:00

基于accepted answer，您可以定义一个宏：

#define handle_tap(view, delegate, selector) do {\
    view.userInteractionEnabled = YES;\
    [view addGestureRecognizer: [[UITapGestureRecognizer alloc] initWithTarget:delegate action:selector]];\
} while(0)

这个宏使用ARC，因此没有 release 调用 .

宏用法示例：

handle_tap(userpic, self, @selector(onTapUserpic:));

回复于 2024-04-27T07:21:45+08:00

Swift 3 & Swift 4

import UIKit

extension UIView {
  func addTapGesture(tapNumber: Int, target: Any, action: Selector) {
    let tap = UITapGestureRecognizer(target: target, action: action)
    tap.numberOfTapsRequired = tapNumber
    addGestureRecognizer(tap)
    isUserInteractionEnabled = true
  }
}

Use

yourView.addTapGesture(tapNumber: 1, target: self, action: #selector(yourMethod))

回复于 2024-04-27T07:21:45+08:00

您可以通过在代码中添加Gesture Recogniser来实现此目的 .

Step 1: ViewController.m：

// Declare the Gesture.
UITapGestureRecognizer *gesRecognizer = [[UITapGestureRecognizer alloc] 
                                          initWithTarget:self 
                                          action:@selector(handleTap:)];
gesRecognizer.delegate = self;

// Add Gesture to your view.
[yourView addGestureRecognizer:gesRecognizer];

Step 2: ViewController.m：

// Declare the Gesture Recogniser handler method.
- (void)handleTap:(UITapGestureRecognizer *)gestureRecognizer{
   NSLog(@"Tapped");
}

注意：这里你的视图是 @property (strong, nonatomic) IBOutlet UIView *localView;

EDIT: * localView是Main.storyboard中的白色框，从下面开始

enter image description here

回复于 2024-04-27T07:21:45+08:00

110

这是一个Swift版本：

// MARK: Gesture Extensions
extension UIView {

    func addTapGesture(#tapNumber: Int, target: AnyObject, action: Selector) {
        let tap = UITapGestureRecognizer (target: target, action: action)
        tap.numberOfTapsRequired = tapNumber
        addGestureRecognizer(tap)
        userInteractionEnabled = true
    }

    func addTapGesture(#tapNumber: Int, action: ((UITapGestureRecognizer)->())?) {
        let tap = BlockTap (tapCount: tapNumber, fingerCount: 1, action: action)
        addGestureRecognizer(tap)
        userInteractionEnabled = true
    }
}

回复于 2024-04-27T07:21:45+08:00

550

斯威夫特3：

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

func handleTapGestureRecognizer(_ gestureRecognizer: UITapGestureRecognizer) {

}

回复于 2024-04-27T07:21:45+08:00

在 Swift 4.2 和Xcode 10中

使用 UITapGestureRecognizer 添加触摸事件

//Add tap gesture to your view
let tap = UITapGestureRecognizer(target: self, action: #selector(handleGesture))
yourView.addGestureRecognizer(tap)

// GestureRecognizer
@objc func handleGesture(gesture: UITapGestureRecognizer) -> Void {
//Write your code here
}

如果你想使用 SharedClass

//This is my shared class
import UIKit

class SharedClass: NSObject {

    static let sharedInstance = SharedClass()

    //Tap gesture function
    func addTapGesture(view: UIView, target: Any, action: Selector) {
        let tap = UITapGestureRecognizer(target: target, action: action)
        view.addGestureRecognizer(tap)
    }
}

我的ViewController中有3个视图，名为view1，view2和view3 .

override func viewDidLoad() {
    super.viewDidLoad()
    //Add gestures to your views
    SharedClass.sharedInstance.addTapGesture(view: view1, target: self, action: #selector(handleGesture))
    SharedClass.sharedInstance.addTapGesture(view: view2, target: self, action: #selector(handleGesture))
    SharedClass.sharedInstance.addTapGesture(view: view3, target: self, action: #selector(handleGesture2))

}

// GestureRecognizer
@objc func handleGesture(gesture: UITapGestureRecognizer) -> Void {
    print("printed 1&2...")
}
// GestureRecognizer
@objc func handleGesture2(gesture: UITapGestureRecognizer) -> Void {
    print("printed3...")
}

回复于 2024-04-27T07:21:45+08:00

16
这是ios tapgesture;首先，您需要在操作下面编写以下代码后为GestureRecognizer创建操作，如下所示
```
- (IBAction)tapgesture:(id)sender

{


[_password resignFirstResponder];


[_username resignFirstResponder];

NSLog(@" TapGestureRecognizer  tapped");

}
```
回复于 2024-04-27T07:21:45+08:00

另一种方法是在视图中添加透明按钮

UIButton *b = [UIButton buttonWithType:UIButtonTypeCustom];
b.frame = CGRectMake(0, 0, headerView.width, headerView.height);
[headerView addSubview:b];
[b addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchDown];

然后，处理点击：

- (void)buttonClicked:(id)sender
{}

回复于 2024-04-27T07:21:45+08:00

2

你们为什么不试试SSEventListener？

您不需要创建任何手势识别器，并将您的逻辑与另一种方法分开 . SSEventListener 支持在视图上设置侦听器块以侦听单击手势，双击手势和N-tap手势如果你喜欢，并长按手势 . 设置单击手势监听器就变成了这种方式：

[view ss_addTapViewEventListener:^(UITapGestureRecognizer *recognizer) { ... } numberOfTapsRequired:1];

回复于 2024-04-27T07:21:45+08:00

如何向UIView添加触摸事件？

13 回答

手势识别器

在Interface Builder中添加手势

以编程方式添加手势

更多例子

相关问题