如何在IOS中的动态按钮上使用标签？

Question

我使用 for 循环创建了按钮。按钮做得非常好。现在我必须对所有动态按钮进行单一的 IB 操作。我也设置了标签。我正在使用的代码如下所示。但该操作并未确定我要使用的确切按钮。

for (int i=0; i < 10; i++){

     btnphoto=[[UIButton alloc]initWithFrame:CGRectMake(10,(30*i)+110,50,20)];

     [btnphoto setTitle:@"Photo" forState:UIControlStateNormal];

     [btnphoto addTarget:self action:@selector(someMethod:)forControlEvents:UIControlEventTouchUpInside];

     btnphoto.tag=100 + i;

     [self.view addSubview:btnphoto];

}

-(void)someMethod:(UIButton *)sender{

}

Answer 1

试试上面的代码，这可能会有所帮助：

-(void)someMethod:(id)sender{
   UIButton *btn = (UIButton *)[self.view viewWithTag:btn_tag];
    switch([btn tag])
    {
     case :101
       [btn setBackgroundColor:[UIColor redColor]];
        break;

      case :102
           [btn setBackgroundColor:[UIColor redColor]];
           break;

      case :103
           [btn setBackgroundColor:[UIColor blueColor]];
           break;
   }
}

Answer 2

由于您已经为每个按钮设置了标签，因此只需执行以下操作即可识别已触摸的按钮

-(void)someMethod:(id)sender
{
    UIButton *TouchedButton=(UIButton *)sender;
    int TouchedButtonTag=[TouchedButton tag]; // Now you can uniquely identify your buttons by this tag. 
    // do your stuff for respective button touched event

   switch([TouchedButton tag])
   {
      case :101
           [TouchedButton setBackgroundColor:[UIColor redColor]];
           break;

      case :102
           [TouchedButton setBackgroundColor:[UIColor redColor]];
           break;

      case :103
           [TouchedButton setBackgroundColor:[UIColor blueColor]];
           break;

     // and so on...
   }
}

Answer 3

试试这个

for (int i=0; i < 10; i++){

    UIButton *button=[[UIButton alloc]initWithFrame:CGRectMake(10,(30*i)+110,50,20)];

    [button setTitle:@"Photo" forState:UIControlStateNormal];

    [button addTarget:self action:@selector(someMethod:)forControlEvents:UIControlEventTouchUpInside];

    button.tag=100 + i;

    [self.view addSubview:button];

}

要显示不同的颜色，首先在数组中添加颜色

NSMutableArray *colorArray=[[NSMutableArray alloc] initWithObjects:[UIColor redColor],[UIColor blueColor],[UIColor greenColor],nil];    

然后

-(void)someMethod:(UIButton *)sender{
    NSLog(@"Btn Tag = %d",sender.tag);
    int randomNum=arc4random()%3;
    [sender setBackgroundColor:[colorArray objectAtIndex:randomNum]];
}

Answer 4

您必须从函数中实际访问按钮的 tag 属性以确定哪个按钮调用了选择器。

-(void)someMethod:(UIButton *)sender {

    UIButton *tappedButton = sender;

    NSInteger tag = tappedButton.tag;
    NSLog(@"This is the button with tag: %ld",tag);

    [tappedButton setBackgroundColor:[UIColor redColor]];
}

Answer 5

如果你想改变颜色或任何属性，那么你可以这样做

//我只是给你一个例子，我如何改变 UIButton 的标题，就像你可以改变颜色属性一样......我刚刚在我的一些代码中使用了这个......

 -(void)someMethod:(id)sender {
          //1...this will change all the button title with string "Changed" 
            [sender setTitle:@"Changed" forState:UIControlStateNormal];


         //2..now if you want to just change the property of uibutton on basis of tag value
             [(UIButton *)[self.contentView viewWithTag:Your_TAG_VALUE] setTitle:@"JustChanged" forState:UIControlStateNormal];


    }

Answer 6

-(void)someMethod:(id)sender{     

       UIButton *btn = (UIButton *)sender;
       int *btn_tag=btn.tag;

       NSLog(@"This is the button with tag: %d", btn_tag);


    }

Answer 7

试试这个 -

在 someMethod 方法中 -

UIButton *button = sender;

int buttonTagIndex = button.tag;

现在 buttonTagIndex 为您提供所选按钮的标签索引。