Ios 如果输入一个给定的ViewController，如何删除选项卡栏

设置：

假设我有2个TableViewController（都在它们自己的NavigationController中），它们相应地包含TypeA和B项

在任何TableView中，如果我点击“+”按钮，它将切换到一个Add[？]ItemViewController（“？”是项的类型：a或B）。因此通常，即使我已经在AddView中，我也可以通过点击选项卡栏图标切换到另一个视图，对吗

那么，如果用户已经输入了一个AddView，我如何禁止用户切换呢

是否使用Swift代码？或者只是改变故事板的结构

以下是Main.storyboard的结构：

我们在应用程序中做了完全相同的操作。隐藏默认值的步骤 TabBar，只需在 父视图控制器（或应用程序中的每个视图控制器）

另一个解决方案 您还可以隐藏选项卡栏

// 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;

    // 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];
}

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

// illustration of a call to toggle current state
- (IBAction)pressedButton:(id)sender {

    [self setTabBarVisible:![self tabBarIsVisible] animated:YES completion:^(BOOL finished) {
        NSLog(@"finished");
    }];
}

---

我已经补充了答案，如果有帮助，请投票表决

// 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;

    // 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];
}

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

// illustration of a call to toggle current state
- (IBAction)pressedButton:(id)sender {

    [self setTabBarVisible:![self tabBarIsVisible] animated:YES completion:^(BOOL finished) {
        NSLog(@"finished");
    }];
}

DetailViewController *detailViewController = [[DetailViewController alloc] init];
detailViewController.hidesBottomBarWhenPushed = YES;
[[self navigationController] pushViewController:detailViewController animated:YES];