iPhone中如何在打开一个新view时隐藏全局的TabBar?

参考资料:http://www.cocoachina.com/bbs/simple/?t25042.html

问题实质无非是要把View Tree里的各个组件的大小进行动态调整.

首先在AppDelegate中我有一个UITabBarController, 比如叫 FrameViewController

然后我要push一个叫做 UserDetails 的普通View,并且希望隐藏下面的TabBar

使用setHidden,hidesBottomBarWhenPushed神马的终究不给力,因为即使把TabBar隐藏了,内部的ViewController所占的空间依然没有改变,因此下面会留下一片空白.

归根结底还要自己调整尺寸.

在AppDelegate中定义这儿一个全局函数即可

- (void) hideTabBar:(BOOL) hidden{
 
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0];
 
    for(UIView *view in self.tabBarController.view.subviews)
    {
        if([view isKindOfClass:[UITabBar class]])
        {
            if (hidden) {
                [view setFrame:CGRectMake(view.frame.origin.x, 480, view.frame.size.width, view.frame.size.height)];
            } else {
                [view setFrame:CGRectMake(view.frame.origin.x, 480-44, view.frame.size.width, view.frame.size.height)];
            }
        } 
        else
        {
            if (hidden) {
                [view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, 480)];
            } else {
                [view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, 480-44)];
            }
        }
    }
 
    [UIView commitAnimations];
}