iOS中按钮根据tag来区分

最新推荐文章于 2018-04-18 15:36:23 发布

劉胡來

最新推荐文章于 2018-04-18 15:36:23 发布

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本文介绍如何在iOS应用中创建UIButton并设置点击事件处理方法。通过示例代码展示了如何为不同按钮分配不同的tag，并在点击事件中通过tag区分不同的按钮。

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- (void) createButton
{
  UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
  button.frame = CGRectMake(20, 60, 80, 40);
  
  [button setTitle:@"扫按1" forState:UIControlStateNormal];
  [button setTag:22];
  [self.view addSubview:button];
  
  //[button addTarget:self action:@selector(ClickEvent) forControlEvents:UIControlEventTouchUpInside];
  
  //注意按钮的回调事件
  [button addTarget:self action:@selector(ClickEvent:) forControlEvents:UIControlEventTouchUpInside];
  
  
  
  //下面测试多个button调用同一个事件，类似Ａdnroid中的事件类
  UIButton *button2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
  button2.frame = CGRectMake(20, 100, 80, 40);
  
  [button2 setTitle:@"按钮2" forState:UIControlStateNormal];
  
  [self.view addSubview:button2];
  // clickevent include muitle arges
  [button2 addTarget:self action:@selector(ClickEvent:) forControlEvents:UIControlEventTouchUpInside];
  
  [button2 setTag:21];

}
//回调事件
- (void) ClickEvent
{
  NSLog(@"button click event......");
}

- (void) ClickEvent:(UIButton *) button
{
  NSUInteger BtnTag = [button tag];
  if(BtnTag == 21)
  {
     NSLog(@"\nbutton is:button2");
  }
  else
  {
    NSLog(@"\nbutton is:button1");
  }
 
}