如何在iOS中隐藏动画标签栏？ [英] How to hide tab bar with animation in iOS?

问题描述

所以我有一个连接到IBAction的按钮。当我按下按钮时，我想用动画隐藏iOS应用程序中的标签栏。这个 [self setTabBarHidden：hidden animated：NO]; 或者这个 [self.tabBarController setTabBarHidden：hidden animated：YES]; 不起作用。这是我没有动画的代码：

So I have a button that is connected to a IBAction. When I press the button I want to hide the tab bar in my iOS app with a animation. This [self setTabBarHidden:hidden animated:NO]; or this [self.tabBarController setTabBarHidden:hidden animated:YES]; does not work. This is my code without the animation:

- (IBAction)picture1:(id)sender {
    [self.tabBarController.tabBar setHidden:YES];
}

任何帮助将不胜感激：D

Any help would be greatly appreciated :D

推荐答案

我尝试使用以下公式保持查看动画：

I try to keep view animations available to me using the following formula:

// pass a param to describe the state change, an animated flag and a completion block matching UIView animations completion 
- (void)setTabBarVisible:(BOOL)visible animated:(BOOL)animated completion:(void (^)(BOOL))completion {

    // bail if the current state matches the desired state
    if ([self tabBarIsVisible] == visible) return (completion)? completion(YES) : nil;

    // 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);
    } completion:completion];
}

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

//An illustration of a call to toggle current state
- (IBAction)pressedButton:(id)sender {
    [self setTabBarVisible:![self tabBarIsVisible] animated:YES completion:^(BOOL finished) {
        NSLog(@"finished");
    }];
}

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