UINavigationController滑动返回

标签：ios   uinavigationcontroll   interactivepopgestur   滑动   返回   

*.首先说明个普遍碰到的问题

网上普遍看到说, 在UINavigationController下自定义leftBarButtonItem会导致滑动失效, 解决方案：http://blog.csdn.net/meegomeego/article/details/25879605

  但我想告诉大家, 我也是自定义了leftBarButtonItem却没有碰到上述问题, 我是统一写了一个BaseViewController作为所有controller父类, 除了rootConrtoller, 这里不知为何, 有知道的可以留言.

    排除上述原因， 下面介绍下怎么实现滑动：

1. 自定义UINavigationController(我写了个UIBaseNavigationController)以共用, 在ViewDidLoad里加入代码：

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    /* UINavigationControllerDelegate */
    self.delegate = self;
    
    / swipe gesture /
    __weak typeof (self)weakSelf = self;
    if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
//        self.interactivePopGestureRecognizer.enabled = YES;
          /* UIGestureRecognizerDelegate */
          self.interactivePopGestureRecognizer.delegate = weakSelf;
    }
}

2. 在滑动过程中你会发现如果在pushViewController的动画过程中激活滑动手势会导致crash, 解决方案：

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

3. 自然, 在当你加载完成下一个viewController之后需要激活滑动手势：

/ set gesture yes when showViewController /
- (void)navigationController:(UINavigationController )navigationController didShowViewController:(UIViewController )viewController animated:(BOOL)animated
{
    if ([navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        navigationController.interactivePopGestureRecognizer.enabled = YES;
    }
}

4. 当然, 你还会发现一个问题：在rootController下滑动的时候, 在想push到下一个页面会没有反应, 界面卡死在那了, 所以还需要在上述方法中加入以下代码：

/ set gesture yes when showViewController /
- (void)navigationController:(UINavigationController )navigationController didShowViewController:(UIViewController )viewController animated:(BOOL)animated
{
    if ([navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        navigationController.interactivePopGestureRecognizer.enabled = YES;
    }
    
    / if rootViewController, set delegate nil /
    if (navigationController.viewControllers.count == 1) {
        navigationController.interactivePopGestureRecognizer.enabled = NO;
        navigationController.interactivePopGestureRecognizer.delegate = nil;
    }
}

这样的话, 就可以完成navigationcontroller下的返回滑动了, 和微信一样一样滴~~~~~

UINavigationController滑动返回

标签：ios   uinavigationcontroll   interactivepopgestur   滑动   返回   

原文地址：http://blog.csdn.net/dexin5195/article/details/43965093