#import

@interface RCDNavigationViewController : UINavigationController

@end

//  .m

#import "RCDNavigationViewController.h"

@interface RCDNavigationViewController ()

@end

@implementation RCDNavigationViewController

- (void)viewDidLoad {

[super viewDidLoad];

__weak RCDNavigationViewController *weakSelf = self;

if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]) {

self.interactivePopGestureRecognizer.delegate = weakSelf;

self.delegate = weakSelf;

self.interactivePopGestureRecognizer.enabled = YES;

}

}

- (void)pushViewController:(UIViewController *)viewController

animated:(BOOL)animated {

if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)] &&

animated == YES) {

self.interactivePopGestureRecognizer.enabled = NO;

}

[super pushViewController:viewController animated:animated];

}

- (NSArray *)popToRootViewControllerAnimated:(BOOL)animated {

if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)] &&

animated == YES) {

self.interactivePopGestureRecognizer.enabled = NO;

}

return [super popToRootViewControllerAnimated:animated];

}

- (NSArray *)popToViewController:(UIViewController *)viewController

animated:(BOOL)animated {

if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]) {

self.interactivePopGestureRecognizer.enabled = NO;

}

return [super popToViewController:viewController animated:animated];

}

#pragma mark UINavigationControllerDelegate

- (void)navigationController:(UINavigationController *)navigationController

didShowViewController:(UIViewController *)viewController

animated:(BOOL)animate {

if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]) {

self.interactivePopGestureRecognizer.enabled = YES;

}

}

//UIGestureRecognizerDelegate

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {

if ([gestureRecognizer isEqual:self.interactivePopGestureRecognizer] &&

self.viewControllers.count > 1 &&

[self.visibleViewController isEqual:[self.viewControllers lastObject]]) {

//判断当导航堆栈中存在页面，并且 可见视图 如果不是导航堆栈中的最后一个视图时，就会屏蔽掉滑动返回的手势。此设置是为了避免页面滑动返回时因动画存在延迟所导致的卡死。

return YES;

} else {

return NO;

}

}

@end