如何在设置leftBarButtonItem后在UINavigationController中启用后退/左侧滑动手势？ [英] How to enable back/left swipe gesture in UINavigationController after setting leftBarButtonItem?

问题描述

我从这里得到了相反的问题。
默认情况下在 iOS7 中，后退滑动手势 UINavigationController 的堆栈可能会弹出显示的的ViewController 。现在我只为所有 ViewControllers 的所有 self.navigationItem.leftBarButtonItem 样式进行了统一。

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.

以下是代码：

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

之后， navigationController.interactivePopGestureRecognizer 是禁用。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;

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