UIButton作为开关 [英] UIButton as switch

问题描述

我正在尝试使用Xcode4 for iOS中的自定义图像创建一个类似按下按钮的按钮。
我正在使用的代码是

I'm trying to create a push-on-push-off-like button with custom images in Xcode4 for iOS. The code I'm using is

- (IBAction)btnAll:(id)sender
{
    UIButton *button = (UIButton *)sender;
    button.selected = !button.selected;
}

现在工作正常。
但我的问题是，当我正在切换时，我按下它，然后它再次弹出然后终于打开。
该应用程序有效，但这确实很难看。

That works fine for now. But my problem is, that when I'm toggling on, I press it on, then it is popping off again and then finally on. The app works, but that is really ugly, though.

我首先将突出显示的图像设置为开启。因此，当我突出显示按钮时，它会亮起并弹出。这很好。但当我再次关闭它时，问题是相反的，反方向。

I firstly set the "highlighted" image to on. So when I highlight the button, it is on and that popping to on. That works fine. But when I turn it off again, the problem is the same, in the reverse direction.

我试图把这个代码：

- (IBAction)btnAll:(id)sender
{
    UIButton *button = (UIButton *)sender;
    if(button.selected)
    {
        [button setImage[UIImage imageNamed@"off.png"] forState:UIControlStateHighlighted];
    }
    else
    {
        [button setImage[UIImage imageNamed@"on.png"] forState:UIControlStateHighlighted];
    }
    button.selected = !button.selected;
}

但是长 button.selected =！按钮。选中没有区别。
所以它不会做任何改变。

But as long button.selected = !button.selected there is no difference. So it won't make any change.

我也尝试在»触摸下来«触发IBAction但是你可以想象这看起来有多么令人沮丧。

I also tried to trigger the IBAction on »Touch Down« but you can imagine how frustrating this will look like.

有没有人能解决这个问题？
有没有人为那个人而烦恼？

Has anybody got a solution for that problem? Did anybody struggle with that one too?

迎接，非常感谢
Julian

Greets, thanks a lot Julian

推荐答案

之前我遇到过类似的问题，点击时按钮的工作有点奇怪。试试这个代码并让我知道它是否有效

I've had a similar problem to this before, the button works a little strangely when tapping. Try this code and let me know if it works

    UIButton *button = (UIButton *)sender;
    if(button.selected)
    {
        [button setImage:[UIImage imageNamed:@"off.png"] forState:UIControlStateHighlighted];
        [button setImage:[UIImage imageNamed:@"off.png"] forState:UIControlStateSelected];
        [button setImage:[UIImage imageNamed:@"off.png"] forState:UIControlStateHighlighted | UIControlStateSelected];
    }
    else
    {
        [button setImage:[UIImage imageNamed:@"on.png"] forState:UIControlStateHighlighted];
        [button setImage:[UIImage imageNamed:@"on.png"] forState:UIControlStateSelected];
        [button setImage:[UIImage imageNamed:@"on.png"] forState:UIControlStateHighlighted | UIControlStateSelected];
    }
    button.selected = !button.selected;

    If (button.selected) {
      [button setImage:[UIImage imageNamed:@"on.png"] forState:UIControlStateNormal];
    } else {
      [button setImage:[UIImage imageNamed:@"off.png"] forState:UIControlStateNormal];
    }

点击并按住某个按钮时，状态实际上是突出显示的&选择此选项，您需要高光和选定状态的图像。

When you tap and hold on a button the state is actually Highlighted & Selected so you need an image for both Highlight and selected state.

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