隐藏导航栏时,UINavigationContoller interactivePopGestureRecognizer处于非活动状态

Question

我有一个嵌套在一个视图控制器UINavigationController.

我已经实现了iOS 7的interactivePopGestureRecognizer,使用户可以手势将VC从堆栈中弹出.

在VC中我有一个滚动视图,当用户不在滚动视图的顶部时,我隐藏了所有的chrome(导航栏和状态栏)以将焦点放在内容上.

但是,如果隐藏了导航栏,则interactivePopGestureRecognizer将无法正常工作.

我已经尝试在它消失后启用它并验证它不是零,但它仍然不起作用.

有什么我想念的吗？

Answer 1

将您的UIViewController子类设置为gestureRecognizer的委托:

self.navigationController.interactivePopGestureRecognizer.delegate = self;

而已!

Answer 2

简单解决方案

只需通过导航控制器设置导航栏的隐藏属性即可

只需使用这两行

self.navigationController.navigationBarHidden = NO;
self.navigationController.navigationBar.hidden = YES;

Answer 3

我用过这个. self.navigationController.interactivePopGestureRecognizer.delegate = self;

也在我的UINavigationController类中,在转换期间禁用interactivePopGestureRecognizer.

- (void)pushViewController:(UIViewController *)viewController
              animated:(BOOL)animated
{
    if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.interactivePopGestureRecognizer.enabled = NO;
}

    [super pushViewController:viewController animated:animated];
}

- (void)navigationController:(UINavigationController *)navigationController
       didShowViewController:(UIViewController *)viewController
                    animated:(BOOL)animated
{
    if ([navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        // disable interactivePopGestureRecognizer in the rootViewController of navigationController
        if ([[navigationController.viewControllers firstObject] isEqual:viewController]) {
            navigationController.interactivePopGestureRecognizer.enabled = NO;
        } else {
            // enable interactivePopGestureRecognizer
            navigationController.interactivePopGestureRecognizer.enabled = YES;
        }
    }
}

在rootViewController中禁用interactivePopGestureRecognizer的原因是:当从rootViewController中的边缘滑动然后在下一个viewController中点击某些内容时,UI将不会接受任何触摸.按下主页按钮将应用程序置于后台,然后点击它进入前景...