iOS开启与关闭侧滑返回手势

开启与关闭某ViewController 的侧滑返回手势，注意开启时，一定在viewWillDisappear中去设置enable为yes ，因为在viewDidDisAppear中，该视图的手势已经被移除了 ，设置会失效

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    // 开启返回手势
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = YES;
    }
}

- (void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:animated];

    //关闭左滑返回
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)])
        self.navigationController.interactivePopGestureRecognizer.enabled = NO;
}