一 ，在iOS7.0之后添加了边缘滑动返回，如果在被push的控制器设置了自定义导航条或者自定义左button的时候会失效，通过这句话可以解决
:self.navigationController.interactivePopGestureRecognizer.delegate = self
并设置代理：UIGestureRecognizerDelegate
二 ，屏蔽系统自带滑动返回
self.navigationController.interactivePopGestureRecognizer.enabled = NO；
三 ，如何设置整个页面滑动返回？
1 获取边缘滑动返回对象
id obj = self.navigationController.interactivePopGestureRecognizer.delegate;
2 调用全屏滑动手势
UIPanGestureRecognizer *gesture= [[UIPanGestureRecognizer alloc] initWithTarget:obj action:@selector(handleNavigationTransition:)];
3 设置代理 添加手势
gesture.delegate = self;
[self.view addGestureRecognizer: gesture];
gesture.delegate = self;
[self.view addGestureRecognizer: gesture];
四。UIGestureRecognizerDelegate
// called when a gesture recognizer attempts to transition out of UIGestureRecognizerStatePossible. returning NO causes it to transition to UIGestureRecognizerStateFailed
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer*)gestureRecognizer;
// called when the recognition of one of gestureRecognizer or otherGestureRecognizer would be blocked by the other
// return YES to allow both to recognize simultaneously. the default implementation returns NO (by default no two gestures can be recognized simultaneously)
//
// note: returning YES is guaranteed to allow simultaneous recognition. returning NO is not guaranteed to prevent simultaneous recognition, as the other gesture's delegate may return YES
- (BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer*)otherGestureRecognizer;
// called once per attempt to recognize, so failure requirements can be determined lazily and may be set up between recognizers across view hierarchies
// return YES to set up a dynamic failure requirement between gestureRecognizer and otherGestureRecognizer
//
// note: returning YES is guaranteed to set up the failure requirement. returning NO does not guarantee that there will not be a failure requirement as the other gesture's counterpart delegate or subclass methods may return YES
- (BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizer shouldRequireFailureOfGestureRecognizer:(UIGestureRecognizer*)otherGestureRecognizerNS_AVAILABLE_IOS(7_0);
- (BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizer shouldBeRequiredToFailByGestureRecognizer:(UIGestureRecognizer*)otherGestureRecognizerNS_AVAILABLE_IOS(7_0);
// called before touchesBegan:withEvent: is called on the gesture recognizer for a new touch. return NO to prevent the gesture recognizer from seeing this touch
- (BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizer shouldReceiveTouch:(UITouch*)touch;
// called before pressesBegan:withEvent: is called on the gesture recognizer for a new press. return NO to prevent the gesture recognizer from seeing this press
- (BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizer shouldReceivePress:(UIPress*)press;