Question

我正在使用自定义UIButton，我想要做的就是当用户触摸按钮时它会变暗，或变成浅灰色，就像普通按钮一样。

我只是希望文本暂时改变颜色，当用户抬起时，它会恢复到常规颜色。

我试过这段代码：

button.showsTouchWhenHighlighted = TRUE;

但是这只是在它周围形成一个白圈，这不是我正在寻找的谢谢你的帮助。

Answer 1

您可以使用以下UIControlEvents：

UIControlEventTouchDown
UIControlEventTouchUpInside
UIControlEventTouchUpOutside

将目标操作方法适当地分配给它们：

 //when touch initiated
 [myButton addTarget:self
              action:@selector(buttonTouchStartAct:)
    forControlEvents:UIControlEventTouchDown];

 //on touch released outside button bounds
 [myButton addTarget:self
              action:@selector(buttonTouchEndAct:)
    forControlEvents:UIControlEventTouchUpOutside];

 //on touch released while still inside button bounds (most commonly used)
 [myButton addTarget:self
              action:@selector(buttonAct:)
    forControlEvents:UIControlEventTouchUpInside];

-(void)buttonTouchStartAct:(UIButton *)sender
{
    [sender.titleLabel setTextColor:[UIColor redColor]];
}

-(void)buttonTouchEndAct:(UIButton *)sender
{
    [sender.titleLabel setTextColor:[UIColor greenColor]];
}

-(void)buttonAct:(UIButton *)sender
{
    //touch ended in this case too
    [self buttonTouchEndAct:sender];

    //...
    //your main button logic
    //...
}

Answer 2

 //when touch initiated
 [myButton addTarget:self
              action:@selector(buttonTouchStartAct:)
    forControlEvents:UIControlEventTouchDown];

 //on touch released outside button bounds
 [myButton addTarget:self
              action:@selector(buttonTouchEndAct:)
    forControlEvents:UIControlEventTouchUpOutside];

 //on touch released while still inside button bounds (most commonly used)
 [myButton addTarget:self
              action:@selector(buttonAct:)
    forControlEvents:UIControlEventTouchUpInside];

然后在方法内部更改按钮的颜色

Answer 3

尝试按钮点击更改标题标签的alpha，如下所示

- (IBAction)buttonClick:(id)sender {
    UIButton *button = sender;
    [UIView animateWithDuration:0.2 delay:0.0 options:UIViewAnimationOptionAllowUserInteraction|UIViewAnimationOptionCurveEaseInOut animations:^
    {
        [button.titleLabel setAlpha:0.5];
    } completion:^(BOOL finished)
    {
        [button.titleLabel setAlpha:1];
    }];
}

点击时调暗UIButton文本

3 个答案: