Question

我有一个按钮，我想设置多个事件。当用户第一次触摸按钮时，我有更改背景图像，当用户再次触摸按钮然后重置第一张图像。怎么用按钮？

提前致谢...

Answer 1

您不必拥有多个事件，只需调用一个函数，并在此函数中更改背景（具有某种指示器，显示哪个背景 - ＆gt; i此处）

- (void)changeBackground {
  i = (i+1)%2;

  if (i == 0)
    // first background
  else 
    // second background    
}

Answer 2

尝试以下

    int i = 0;
   -(void) buttonPressed{
       i++;
       if(i == 1){
           //Here load the view which you want to load on first touch to a button
       }
       else{
           //Here load the other view 
       }
   }

Answer 3

- (void)changeBG {

  BOOL flag = TRUE;

  if (flag == TRUE) {

    // first background
    flag = FLASE;

  } else {

     // second background    
     flag = TRUE;
   }
}

在buttonTouchUPInside方法中调用上面的方法。

Answer 4

in Button action 
-(void)clickOnCheckButton:(id)sender
{
    UIButton *btn_tmp=sender;
    if(!(btn_tmp.selected))
    {
        //you can set your image
        [btn_tmp setSelected:YES];
    }
    else {
        //you can set your image
        [btn_tmp setSelected:NO];
    }

}

Answer 5

try it

- (IBAction)buttonPressed:(id)sender{
    static int counter;
    if (counter == 0){
        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Alert" message:@"ONE" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        [alert release];
    }else if (counter == 1){
        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Alert" message:@"TWO" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        [alert release];
    }else if (counter == 2){
        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Alert" message:@"THREE" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        [alert release];
    }
    counter += 1;


    if (counter >2){
        counter = 0;
    }
}

如何在单个按钮上应用多个事件？

5 个答案: