隐藏TabBar的一些方法小结(适用与各种情况)

在项目中经常遇到隐藏tabBar,实力很多种方法,可以解决不同情况下问题

使用中涉及到view的层次关系,下面的使用方法 1、2不做说明;在使用3、4方法时注意要在tabBar所在的rootView中调用实现(必要时使用委托,已达到所需要的目的)
举例:A(rootView 是tabBarCtroller);B(A的subView);C(B通过pushViewController)
如果想要C出现的时候将tabView隐藏(且C是全屏的,能展开到tabbar存在的位置),B显示的时候babView在显示出来
此情况明显1、2方法不能实现了,要用3、4的方法来实现;
实现方式:B在pushViewController的时候调用其委托函数(即B消失C出现时tabbar隐藏)
if([delegaterespondsToSelector:@selector(hidenTabbar:)])
{
    [delegatehidenTabbar:YES];
}
在A中实现B的委托代码就是3、4;
同样在B的viewWillAppear中也调用其委托:NO;(B显示时tabbar出现)
-(void)viewWillAppear:(BOOL)animated
{
    if([delegate respondsToSelector:@selector(hidenTabbar:)])
    {
        [delegatehidenTabbar:NO];
    }
}

1://隐藏tabBar
WebViewController *webVc = [[WebViewController alloc] init];
webVc.hidesBottomBarWhenPushed = YES;
[self.navigationController pushViewController:webVc animated:YES];
webVc.hidesBottomBarWhenPushed = NO;
[webVc release];

2.系统方法    self.hidesBottomBarWhenPushed = YES;


3:自定义tabBar时候,由tabBarController管理的
//隐藏tabBar
- (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, iphone5?568:480, view.frame.size.width, view.frame.size.height)];
            } else {
                [view setFrame:CGRectMake(view.frame.origin.x, iphone5?568-49:480-49, 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, iphone5?568:480)];
            } else {
                [view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width,  iphone5?568-49:480-49)];
            }
        }
    }
    
    [UIView commitAnimations];
}

//调整子视图
for (UIView *subView in self.view.subviews) {
    if ([subView isKindOfClass:NSClassFromString(@"UITransitionView")]) {
        //调整子视图的高度,UITransitionView视图为UINavitaionController的根视图
        //            subView.frame = CGRectMake(subView.frame.origin.x, subView.frame.origin.y, subView.frame.size.width, 480);
        
        CGRect frame = subView.frame;
        frame.size.height = 480;
        subView.frame = frame;
    }
}

4:类似方法3
- (void)makeTabBarHidden:(BOOL)hide
{
    if ( [self.tabBarController.view.subviews count] < 2 )
    {
        return;
    }
    UIView *contentView;
    
    if ( [[self.tabBarController.view.subviews objectAtIndex:0] isKindOfClass:[UITabBar class]] )
    {
        contentView = [self.tabBarController.view.subviews objectAtIndex:1];
    }
    else
    {
        contentView = [self.tabBarController.view.subviews objectAtIndex:0];
    }
    //    [UIView beginAnimations:@"TabbarHide" context:nil];
    if ( hide )
    {
        contentView.frame = self.tabBarController.view.bounds;
    }
    else
    {
        contentView.frame = CGRectMake(self.tabBarController.view.bounds.origin.x,
                                       self.tabBarController.view.bounds.origin.y,
                                       self.tabBarController.view.bounds.size.width,
                                       self.tabBarController.view.bounds.size.height - self.tabBarController.tabBar.frame.size.height);
    }
    
    self.tabBarController.tabBar.hidden = hide;
}




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