如何以编程方式获取UIBarButtonItems的状态? [英] How do I programmatically get the state of UIBarButtonItems?

问题描述

对于像UIButton这样的UIControl，您可以使用类似 myControl.state 以确定控件当前是否处于按下状态.

With a UIControl such as a UIButton you can use something like myControl.state to figure out whether the control is currently being pressed down.

但是，我需要对某些UIBarButtonItems(不是从UIControl派生的)进行同样的操作，以便在按下其中一个时可以停止编辑表.

However, I need to do the same with some UIBarButtonItems (which are not derived from UIControl), so that I can stop my table from editing while one of them is pressed down.

这是我的代码:

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    //other checks
    for(int b=0; b<self.toolbar.items.count; b++)
    {
        UIControl *currentControl= [self.toolbar.items objectAtIndex:b];
        if(currentControl.state==UIControlStateHighlighted)
        {
            return NO;
        }
    }
    return YES;
}

很明显，它不起作用，因为它假定可以将UIBarButtonItems 视为UIControls，但是我该怎么做呢?

Obviously, it doesn't work, since it assumes that UIBarButtonItems can be treated as UIControls, but how would I do what I'm trying to do here?

推荐答案

如果您想更好地控制UIBarButtonItems，最好的办法是将它们重新创建为UIButtons(使用自定义插图等)，然后使用UIBarButtonItem的-initWithCustomView从实际的UIViews创建按钮项.

If you want more control over your UIBarButtonItems the best thing to do is to recreate them as UIButtons (using custom art, etc), and then use the -initWithCustomView of UIBarButtonItem to create button items from actual UIViews.

这将使您可以完全访问通常的按钮交互方法:唯一的缺点是，默认情况下您不会获得漂亮的条形按钮样式，而您必须自己为此提供艺术品.

This will give you full access to the usual button interactions methods: the only downside is you won't get the nice bar button style by default, and you'll have to provide the art for this yourself.

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