Question

我正在使用NIB文件来布局自定义表格视图单元格。此单元格有一个带有出口的标签，名为lblName。将UITapGestureRecognizer添加到此标签永远不会触发关联的事件。我有userInteractionEnabled = YES。

我猜测问题是UILabel在TableView中并且表/单元视图正在拦截水龙头。我能为此做点什么吗？

我想要做的就是在按下UILabel时执行一些自定义操作！我所见过的所有解决方案都是荒谬的。使用标准工具集应该很容易。但显然不是。

这是我正在使用的代码：

- (void)tapAction {
    NSLog(@"Tap action");
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib

    UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction)]; 
    [recognizer setNumberOfTapsRequired:1];
    //lblName.userInteractionEnabled = true;  (setting this in Interface Builder)
    [lblName addGestureRecognizer:recognizer];
}

Answer 1

方便：

您也可以在该标签的顶部使用隐形按钮。因此，它会减少为该标签添加tapGesture的工作量。

替代方式：

您不应为UILabel创建IBOutlet。执行此操作时，您将在自定义类实现文件中添加插座。您无法访问其他文件。因此，在自定义类IB中为该标签设置标记，并在cellForRowAtIndexPath:方法中编写代码。

<强>更新：

在cellForRowAtIndexPath:方法中，

for(UIView *view in cell.contentViews.subviews) {
    if(view.tag == 1) {
        UITapGestureRecognizer *tap=[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction)];
        [tap setNumberOfTapsRequired:1];
        [view addGestureRecognizer:tap];
    }
}

Answer 2

UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction)]; 
[recognizer setNumberOfTapsRequired:1];
lblName.userInteractionEnabled = YES;  
[lblName addGestureRecognizer:recognizer];

Answer 3

这样做没有问题：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{
   ...
   // create you cell
   UILabel *lbl = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 50)];
   [lbl setText:@"example"];
   [lbl setUserInteractionEnabled:YES];
   [cell.contentView addSubview:lbl];
   UITapGestureRecognizer *tap=[[UITapGestureRecognizer alloc] initWithTarget:self    action:@selector(tapAction:)];
   tap.tag = [NSIndexPath row];
   [tap setNumberOfTapsRequired:1];
   [lbl addGestureRecognizer:tap];
   ... 
}

- (void)tapAction:(id)sender {
  switch(((UITapGestureRecognizer *)sender).view.tag) {
     case 0:
          // code
          break;
     case 1:
         // code
         break;
      ....
     }
}

即使在使用IB

创建UILabel的情况下也是如此

Answer 4

您可以使用以下代码在UITableView单元格中的UILable上添加点按手势

UITapGestureRecognizer *tapGeature = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(lblClick:)];
tapGeature.delegate =self;
tapGeature.numberOfTapsRequired = 1;

cell.lbl.userInteractionEnabled = YES;
[cell.lbl addGestureRecognizer:tapGeature];

并访问选择器方法

- (void)lblClick:(UITapGestureRecognizer *)tapGesture {
    UILabel *label = (UILabel *)tapGesture.view;
    NSLog(@"Lable tag is ::%ld",(long)label.tag);
}

对于Swift

let tapGesture : UITapGestureRecognizer = UITapGestureRecognizer.init(target: self, action: #selector(lblClick(tapGesture:)))
tapGesture.delegate = self
tapGesture.numberOfTapsRequired = 1
cell.lbl.userInteractionEnabled = true
cell.lbl.tag = indexPath.row
cell.lbl.addGestureRecognizer(tapGesture)

func lblClick(tapGesture:UITapGestureRecognizer){
   print("Lable tag is:\(tapGesture.view!.tag)")
}

Answer 5

基于Hardik Thakkar解决方案的Swift 5于2019年更新。要检测单元格中UIlabel上的轻击，请在下面的视图控制器中找到cellForRowAt方法。

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {}

在返回单元格之前，将以下代码放入上述方法中：

let tapGesture : UITapGestureRecognizer = UITapGestureRecognizer.init(target: self, action: #selector(labelTap(tapGesture:)))
tapGesture.delegate = self
tapGesture.numberOfTapsRequired = 1
cell.yourLabel.isUserInteractionEnabled = true
cell.yourLabel.tag = indexPath.row
cell.yourLabel.addGestureRecognizer(tapGesture)            
return cell

在视图控制器中添加一种方法来处理水龙头：

@objc func labelTap(tapGesture:UITapGestureRecognizer){
    print("Label tag is:\(tapGesture.view!.tag)")
}

Answer 6

将点击手势分配给UILabel并将用户交互设置为启用后，在回调函数中，您可以从单元格视图中找到索引路径，但搜索超级视图嵌套：

- (UITableViewCell *) findCellInSuperview:(UIView *)view
{
UITableViewCell *cell = nil;

    NSString *className = NSStringFromClass([[view superview] class]);
    if ([className isEqualToString:@"UITableViewCell"]) {
        cell = (UITableViewCell *)[view superview];
    } else {
        if ([view superview] != nil) {
            cell = [self findCellInSuperview:[view superview]];
        }
    }

return cell;
}

Answer 7

对于Swift 3

let tapGesture : UITapGestureRecognizer = UITapGestureRecognizer.init(target: self, action: 
#selector(lblClick(tapGesture:)))
tapGesture.delegate = self
tapGesture.numberOfTapsRequired = 1
cell.lbl.isUserInteractionEnabled = true
cell.lbl.tag = indexPath.row
cell.lbl.addGestureRecognizer(tapGesture)

然后

func lblClick(tapGesture:UITapGestureRecognizer){
    print("Lable tag is:\(tapGesture.view!.tag)")
}

Answer 8

Dinesh提出的方式将在没有使用属性变量的for循环的情况下工作。

UITapGestureRecognizer *tap=[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction)];
[tap setNumberOfTapsRequired:1];
[self.myUILabel addGestureRecognizer:tap];

Answer 9

您可以在单元格的-awakeFromNib方法中添加下一个

UITapGestureRecognizer* gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGestureRecognizerAction:)];
[self.yourLabel setUserInteractionEnabled:YES];
[self.yourLabel addGestureRecognizer:gesture];

Answer 10

对于斯威夫特来说，你可以在你的cellForRowAtIndexPath方法中添加它。

var tap = UITapGestureRecognizer(target: self, action: "labelTapped")
tap.numberOfTapsRequired = 1
cell.label.addGestureRecognizer(tap)
cell.label.tag = indexPath.row

然后采取行动

func labelTapped(gesture: UITapGestureRecognizer) {
    let indexPath = NSIndexPath(forRow: gesture.view!.tag, inSection: 0)
    let cell = tableView.cellForRowAtIndexPath(indexPath) as UITableViewCell

    // Do whatever you want.
}

如何在表格视图单元格中的UILabel中添加UITapGestureRecognizer？

10 个答案: