简单实现Tabbar的隐藏显示动画

Hide Tabbar Controller with Animation

- (void)setTabBarVisible:(BOOL)visible animated:(BOOL)animated {    // bail if the current state matches the desired state    if ([self tabBarIsVisible] == visible) return;        // get a frame calculation ready    CGRect frame = self.tabBarController.tabBar.frame;    CGFloat height = frame.size.height;    CGFloat offsetY = (visible)? -height : height;        // zero duration means no animation    CGFloat duration = (animated)? 0.3 : 0.0;        [UIView animateWithDuration:duration animations:^{        self.tabBarController.tabBar.frame = CGRectOffset(frame, 0, offsetY);    }];}

 

判断tabBar当前状态

// know the current state- (BOOL)tabBarIsVisible {    return self.tabBarController.tabBar.frame.origin.y < CGRectGetMaxY(self.view.frame);}

 

//调用

- (void)buttonClick{    [self setTabBarVisible:![self tabBarIsVisible] animated:YES];}