用于 UILabel 问题的 UITapGesture 选择器

Posted 2023-02-27

【中文标题】用于 UILabel 问题的 UITapGesture 选择器

【英文标题】：UITapGesture Selector for UILabel issue

【发布时间】：2017-03-20 09:54:16

【问题描述】：

我为 self.view 和 UILabel（mainView 的子视图）添加了 tapGesture，每个执行不同的选择器。

但是唯一的主视图 tapGesture 被调用并且标签 tapgesture 没有被调用。如何处理？

代码如下：

UITapGestureRecognizer  *tapGesForSelf = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesForSelf:)];
[self.view addGestureRecognizer:tapGesForSelf];


UITapGestureRecognizer *tapLblClick = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesForLbl:)];
[lbl addGestureRecognizer:tapLblClick];

对于两个选择器，只有一种方法称为 tapGesForSelf。 这里 lbl 是 self.view 的子视图。

【问题讨论】：

你能分享你的代码吗？

使用 UIButton 代替标签并定义其选择器操作。

How to get UILabel to respond to tap?的可能重复

您是否启用了标签的用户交互？？

是的，它已启用。

【参考方案1】：

试试这个

- (void)viewDidLoad 
    [super viewDidLoad];
    [_lbl setUserInteractionEnabled:YES];
    UITapGestureRecognizer  *tapGesForSelf = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesForSelf:)];
    [self.view addGestureRecognizer:tapGesForSelf];
    UITapGestureRecognizer *tapLblClick = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesForLbl:)];
    [_lbl addGestureRecognizer:tapLblClick];
    [tapGesForSelf requireGestureRecognizerToFail:tapLblClick];

- (void)tapGesForSelf:(UITapGestureRecognizer *)gesture

    NSLog(@"self");

- (void)tapGesForLbl:(UITapGestureRecognizer *)gesture

    NSLog(@"label");

【参考方案2】：

一旦我尝试过并且效果很好，我现在就发布你的问题的答案。

首先在设计中看到标签。我将标签文本设置为“Tap Me”

现在我为视图和标签设置代码

- (void)viewDidLoad

  [super viewDidLoad];

  //TapGesture for Label
  UITapGestureRecognizer *tapLabel = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(actionTapLabel:)];
  tapLabel.delegate = self;
  tapLabel.numberOfTapsRequired = 1;
  lblTapMe.userInteractionEnabled = YES;
  [lblTapMe addGestureRecognizer:tapLabel];

  //TapGesture for View
  UITapGestureRecognizer *tapMainView = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(actionTapMainView:)];
  tapMainView.delegate = self;
  tapMainView.numberOfTapsRequired = 1;
  [self.view addGestureRecognizer:tapMainView];


//Action method for Label
-(void)actionTapLabel:(UITapGestureRecognizer *)gestureOnLabel
    UILabel *label = (UILabel *)gestureOnLabel.view;
    NSLog(@"Lable text is - %@",label.text);


//Action method for View
-(void)actionTapMainView:(UITapGestureRecognizer *)gestureOnMainView
    NSLog(@"The Main view is tapped");

输出截图

【参考方案3】：

请设置UserInteractionEnabled:YES 用于与TapGesture 交互

[lbl setUserInteractionEnabled:YES];