在編寫程式碼中都會有tabBar，有時候為了介面的美觀需要隱藏tabBar  比如試圖控制器之間的切換，進入下級介面會遇到要隱藏tabBar的問題這裡提供了兩個簡單的tabBar隱藏和顯示的函式，用時直接呼叫即可，比較簡單。

#pragma mark-隱藏標籤欄與顯示標籤欄
- (void)hideTabBar {
    if (self.tabBarController.tabBar.hidden == YES) {
        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];
    contentView.frame = CGRectMake(contentView.bounds.origin.x,  contentView.bounds.origin.y,  contentView.bounds.size.width, contentView.bounds.size.height + self.tabBarController.tabBar.frame.size.height);
    self.tabBarController.tabBar.hidden = YES;
    
}
- (void)showTabBar
{
    if (self.tabBarController.tabBar.hidden == NO)
    {
        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];
    contentView.frame = CGRectMake(contentView.bounds.origin.x, contentView.bounds.origin.y,  contentView.bounds.size.width, contentView.bounds.size.height - self.tabBarController.tabBar.frame.size.height);
    self.tabBarController.tabBar.hidden = NO;
    
}