侧滑返回手势的替换

1.iOS7之后系统提供了侧滑手势（interactivePopGestureRecognizer），即从屏幕左侧边缘滑起会pop回导航控制器栈的上个viewController。

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)

{

self.navigationController.interactivePopGestureRecognizer.enabled = YES;

}

2.如果你自定义了UINavigationViewController或者自定义了返回按钮

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)

{

self.navigationController.interactivePopGestureRecognizer.enabled = YES;

self.navigationController.interactivePopGestureRecognizer.delegate = self;

}

3.我的app在使用系统提供的侧滑手势时，出现了页面假死现象，于是我就替换了系统自带的侧滑手势

id target = self.navigationController.interactivePopGestureRecognizer.delegate;

SEL handler = NSSelectorFromString(@"handleNavigationTransition:");

self.LeftScreenGes = [[UIScreenEdgePanGestureRecognizer alloc]initWithTarget:target action:handler];

self.LeftScreenGes.edges = UIRectEdgeLeft;

self.LeftScreenGes.delegate = self;

[self.view addGestureRecognizer:self.LeftScreenGes];

// 关闭边缘触发手势 防止和原有边缘手势冲突

[self.navigationController.interactivePopGestureRecognizer setEnabled:NO];

4.系统提供了侧滑手势，必须从屏幕边缘左侧滑起才会触发，替换成全屏触发

id target = self.navigationController.interactivePopGestureRecognizer.delegate;

SEL handler = NSSelectorFromString(@"handleNavigationTransition:");

//  创建pan手势 作用范围是全屏

self.fullScreenGes = [[UIPanGestureRecognizer alloc]initWithTarget:target action:handler];

self.fullScreenGes.delegate = self;

[self.view addGestureRecognizer:self.fullScreenGes];

// 关闭边缘触发手势 防止和原有边缘手势冲突

[self.navigationController.interactivePopGestureRecognizer setEnabled:NO];