设置 leftBarButtonItem 后如何在 UINavigationController 中启用后退/左滑手势?

How to enable back/left swipe gesture in UINavigationController after setting leftBarButtonItem?(设置 leftBarButtonItem 后如何在 UINavigationController 中启用后退/左滑手势?)

问题描述

我从 这里得到了相反的问题.iOS7 默认情况下，UINavigationController 堆栈的向后滑动手势可以弹出呈现的ViewController.现在我只是统一了所有 ViewControllers 的所有 self.navigationItem.leftBarButtonItem 样式.

I got the opposite issue from here. By default in iOS7, back swipe gesture of UINavigationController's stack could pop the presented ViewController. Now I just uniformed all the self.navigationItem.leftBarButtonItem style for all the ViewControllers.

代码如下:

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:LOADIMAGE(@"back_button") style:UIBarButtonItemStylePlain target:self action:@selector(popCurrentViewController)];

之后，navigationController.interactivePopGestureRecognizer 被禁用.如何在不删除自定义 leftBarButtonItem 的情况下启用弹出手势?

after that, the navigationController.interactivePopGestureRecognizer is disabled. How could I make the pop gesture enabled without removing the custom leftBarButtonItem?

谢谢！

推荐答案

在viewDidLoad中首先设置委托:

First set delegate in viewDidLoad:

self.navigationController.interactivePopGestureRecognizer.delegate = self;

然后在推送时禁用手势:

And then disable gesture when pushing:

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

并在 viewDidDisappear 中启用:

And enable in viewDidDisappear:

self.navigationController.interactivePopGestureRecognizer.enabled = YES;

另外，将 UINavigationControllerDelegate 添加到您的视图控制器.

Also, add UINavigationControllerDelegate to your view controller.

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