Question

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapTapTap:)];
[self.view1 addGestureRecognizer:tapGesture];
[self.view2 addGestureRecognizer:tapGesture];
[tapGesture release];

在上面的代码中，只识别view2上的点按。如果我注释掉第三行，则会识别view1上的点按。如果我是对的，你只能使用一次手势识别器，我不确定这是一个bug还是只需要更多的文档。

Answer 1

UIGestureRecognizer与单个视图一起使用。我同意文件不稳定。 UIGestureRecognizer有一个view属性会将其删除：

查看

手势识别器附加到的视图。（只读）

@property（非原子，只读）UIView * view

讨论您将手势识别器附加（或添加）到UIView对象   使用addGestureRecognizer：   方法

Answer 2

我使用下面的方法解决了这个问题。

for (UIButton *aButton in myButtons) {

            UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
            longPress.minimumPressDuration=1.0;
            [aButton addGestureRecognizer:longPress];
            [longPress release];

}

然后在我的handleLongPress方法中，我只是将UIButton设置为等于手势识别器的视图，并根据该按钮分支我做的事情

- (void)handleLongPress:(UILongPressGestureRecognizer*)gesture {
    if ( gesture.state == UIGestureRecognizerStateEnded ) {
        UIButton *whichButton=(UIButton *)[gesture view];
        selectedButton=(UIButton *)[gesture view];
    ....
}

Answer 3

对于Swift 3，如果有人要求：基于上面的Bhavik Rathod答案。

crypto

Answer 4

不，您不应将手势识别器附加到多个视图。

Apple文档中有明确的信息：

手势识别器附加到视图

每个手势识别器都与一个视图相关联。相比之下，a   视图可以有多个手势识别器，因为单个视图   可能会回应许多不同的手势。对于手势识别器   识别特定视图中发生的触摸，必须附加   这种观点的手势识别器。

Event Handling Guide for iOS - Gesture Recognizers Apple Developer Library

虽然其他人提到它们可能在某些情况下起作用，但它显然违反了文档，并且可能会在未来的任何iOS版本中发生变化。

您可以做的是为要监控的视图添加单独的手势识别器，他们可以共享一个共同的操作。

Answer 5

我们可以做这样的事情，简单易行

1）在控制器中创建如下函数（此函数将返回GestureRecognizer）

-(UITapGestureRecognizer*)setRecognizer{
     UITapGestureRecognizer *gestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(openProfile)];
     [gestureRecognizer setNumberOfTapsRequired:1];
     return gestureRecognizer;
}

2）现在在多个视图中设置此识别器

[self.view1 addGestureRecognizer:[self setRecognizer]]; 
[self.view2 addGestureRecognizer:[self setRecognizer]];

Answer 6

如果有人不想为上面已经解答的kwalker之类的多个按钮添加手势视图的代码，并希望通过Interface Builder这样做，这可能对您有帮助。

1）您可以添加来自对象库的Long Press手势识别器，就像添加UIButtons和UILabels等其他对象一样。

enter image description here 最初我最终使用的是我只拿了一个

2）将引用插座设置为UIButton，并使用文件所有者发送操作。

enter image description here

注意：如果您有多个UIButton或任何其他对象，则每个对象都需要单独的手势识别器。有关详细信息，请参阅我的这个问题。Getting wrong UIButton tag on Long press gesture recognizer

Answer 7

按＆＃39; <UIScrollViewDelegate>＆＃39;

覆盖课程

在.m类中使用此方法：

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    return YES;
}

此方法可帮助您在单个视图中启用多次滑动..

Answer 8

每次添加指向同一个func的手势识别器时，如何重写（重新创建）GestureRecognize。在下面的情况下它工作。我正在使用IBOutletCollection

斯威夫特2：

@IBOutlet var topicView: [UIView]!

override func viewDidLoad() {
        for view in self.topicView as [UIView] {
        view.addGestureRecognizer(UITapGestureRecognizer(target: self, action: "viewClicked:"))
    }
}

func viewClicked(recognizer: UITapGestureRecognizer) {
    print("tap")
}

Answer 9

如果你有固定观点我建议你做这样的事情

[self.view1 addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapTapTap:)]];
[self.view2 addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapTapTap:)]];

这种方式会减少多个不同的无用变量

Answer 10

您可以在视图上创建通用扩展名，以轻松添加手势识别器。这只是一个例子，但看起来可能像这样

extension UIView {

    func setGestureRecognizer<Gesture: UIGestureRecognizer>(of type: Gesture.Type, target: Any, actionSelector: Selector, swipeDirection: UISwipeGestureRecognizer.Direction? = nil, numOfTaps: Int = 1) {
    let getRecognizer = type.init(target: target, action: actionSelector)

    switch getRecognizer {
    case let swipeGesture as UISwipeGestureRecognizer:
        guard let direction = swipeDirection else { return }
        swipeGesture.direction = direction
        self.addGestureRecognizer(swipeGesture)
    case let tapGesture as UITapGestureRecognizer:
        tapGesture.numberOfTapsRequired = numOfTaps
        self.addGestureRecognizer(tapGesture)
    default:
        self.addGestureRecognizer(getRecognizer)
    }
  }

}

要在视图上添加2次点击识别器，只需调用：

let actionSelector = #selector(actionToExecute)
view.setGestureRecognizer(of: UITapGestureRecognizer.self, target: self, actionSelector: actionSelector, numOfTaps: 2)

您还可以轻松添加滑动识别器

view.setGestureRecognizer(of: UISwipeGestureRecognizer.self, target: self, actionSelector: actionSelector, swipeDirection: .down)

，依此类推。只要记住目标必须链接到选择器即可。

Answer 11

我知道这是一篇过时的文章，但是我发现类似的内容，希望对其他人有用。我只是简单地将imageViews存储在一个数组中，然后将其分配给函数中的手势识别器以设置每个图像视图。

在我的viewDidLoad（）中：

imageViewList = [imageView, imageView2, imageView3]
setupImageViews(imageViews: imageViewList)

用于设置图像视图的功能：

func setupImageViews(imageViews: [UIImageView]) {
    
    for imageView in imageViews {
        let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(imageTapped(tapGestureRecognizer:)))
        imageView.isUserInteractionEnabled = true
        imageView.addGestureRecognizer(tapGestureRecognizer)
        
        //set up image to be displayed with the right aspect
        imageView.autoresizingMask = [.flexibleWidth, .flexibleHeight, .flexibleBottomMargin, .flexibleRightMargin, .flexibleLeftMargin, .flexibleTopMargin]
        imageView.contentMode = .scaleAspectFit // OR .scaleAspectFill
        imageView.clipsToBounds = true
    }
}

在动作选择器imageTapped（）中，您可以为所点击的图像视图获取相应的代码。

@objc func imageTapped(tapGestureRecognizer: UITapGestureRecognizer)
{
    switch tapGestureRecognizer.view {
    case imageView:
        print("tapped Image View 1") //add your actions here
    case imageView2:
        print("tapped Image View 2") //add your actions here
    case imageView3:
        print("tapped Image View 3") //add your actions here
    default:
        print("Tap not detected")
    }
    _ = tapGestureRecognizer.view as! UIImageView
    //additional code...
}

Answer 12

您可以使用此代码执行此操作，我的视图是xib中的imageview。

- (void)viewDidLoad
{
    firstIV.tag = 501;
    secondIV.tag = 502;
    thirdIV.tag = 503;
    forthIV.tag = 504;

    [self addTapGesturetoImageView: firstIV];
    [self addTapGesturetoImageView: secondIV];
    [self addTapGesturetoImageView: thirdIV];
    [self addTapGesturetoImageView: forthIV];
}

-(void)addTapGesturetoImageView:(UIImageView*)iv
{
    iv.userInteractionEnabled = YES;
    UITapGestureRecognizer * textfielBGIVTapGasture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(textfielBGIVTapped:)];
    textfielBGIVTapGasture.numberOfTapsRequired = 1;
    [iv addGestureRecognizer:textfielBGIVTapGasture];
}

- (void)textfielBGIVTapped:(UITapGestureRecognizer *)recognizer {
    int tag = recognizer.view.tag-500;
    switch (tag) {
        case 1:
        {
            //firstIV tapped;
            break;
        }
        case 2:
        {
            //secondIV tapped;
            break;
        }
        case 3:
        {
            //thirdIV tapped;
            break;
        }
        case 4:
        {
            //forthIV tapped;
            break;
        }
        default: {
            break;
        }
    }
}

你能将UIGestureRecognizer附加到多个视图吗？

12 个答案: