当按钮是UICollectionViewCell的子视图时，未调用UIButton的目标方法

4 回答

• 0

  对于UICollection视图我使用此代码根据您的要求修改它

  - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
   {
      static NSString *identifier = @"cellIdentifier";
      UICollectionViewCell *cell=[collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
  
  
      for (UIView * subView  in cell.contentView.subviews)
      {
          if ([subView isKindOfClass:[UIButton class]])
          {
              yourButton = (UIButton *)[cell viewWithTag:103];
          }
      }
  
      [yourButton addTarget:self action:@selector(AddFriends:) forControlEvents:UIControlEventTouchUpInside];
      [yourButton setTintColor:[UIColor blackColor]];
  
      return cell;
   }
  
  
   -(void)AddFriends:(id)sender
   {
      [self showLoadingView];
      UIButton *btnTapped = (UIButton *)sender;
      NSString* detailsId = btnTapped.accessibilityIdentifier;
      NSLog(@"str ID : %@",detailsId);
      .
      .
      .
      .
   }
  

  回复于 2024-05-06T13:27:38+08:00
• 0

  请试试这段代码 .

  在viewDidLoad方法中，这里CollectionCell是我创建的自定义单元格 .

  override func viewDidLoad() {
      super.viewDidLoad()
      collectionView.register(CollectionCell.self, forCellWithReuseIdentifier: "CollectionCell")
  }
  

  CollectionView DataSource方法，

  extension ViewController: UICollectionViewDataSource {
      func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
          let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CollectionCell", for: indexPath) as! CollectionCell
  
          let btn = UIButton(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
          btn.tag = indexPath.row
          btn.setTitle("Tap Me", for: .normal)
          btn.setTitleColor(UIColor.blue, for: .normal)
          btn.backgroundColor = UIColor.lightGray
          btn.addTarget(self, action:#selector(btnTapped(sender:)), for: .touchUpInside)
          cell.addSubview(btn)
  
          return cell
      }
  
      func numberOfSections(in collectionView: UICollectionView) -> Int {
          return 1
      }
      func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
          return 30
      }
  }
  

  和UICollectionView Delegate方法，

  extension ViewController: UICollectionViewDelegate {
      func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
          print("Did Select")
      }
  }
  

  你的按钮点击方法是这样的，

  @objc func btnTapped(sender: UIButton) {
      print("Button tapped at index ", sender.tag)
  }
  

  这对我来说可以 . 请根据您的要求进行必要的更改 .

  如有任何疑问，请告诉我，以便我们进一步帮助您 .

  回复于 2024-05-06T13:27:38+08:00
• 0

  您可以轻松找到调用的事件 . 如果单击 collectionView cell ，则调用 collectView delegate 方法

  SWIFT

  func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
          print("collection did select")
      }
  

  如果你点击单元格的按钮

  func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
          let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CollectionCell", for: indexPath) as! CollectionCell
  
          cell.YOUR_BUTTON.tag = indexPath.item
          cell.YOUR_BUTTON.addTarget(self, action:#selector(btnClick(sender:)), for: .touchUpInside)
  
          return cell
      }
  
  @objc func btnClick(sender: UIButton) {
      print(sender.tag)
  }
  

  OBJECTIVE C

  - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
  {
      UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"CollectionCell" forIndexPath:indexPath];
  
      cell.YOUR_BUTTON.tag = indexPath.item
      [cell.YOUR_BUTTON addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
  
  }
  -(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath  {
      NSLog(@"collection did select");
  }
  
  -(void)btnClick(sender: UIButton) {
      NSLog(@"button click index %d",sender.tag)
  }
  

  回复于 2024-05-06T13:27:38+08:00
• 0

  上面的所有答案都是正确的并且会给你你想要的结果，但是我建议你为单元类制定自己的协议并实现委托方法来获得结果，而不是使用tag和all .

  我也在另一篇文章中回答了这个问题 . 请检查链接..并停止分配标签并使用它来识别您的按钮并实施按钮单击

  https://stackoverflow.com/a/48882197/9130596

  回复于 2024-05-06T13:27:38+08:00