import "CBNavigationController.h"

@implementation CBNavigationController

(void)viewDidLoad
{
__weak CBNavigationController *weakSelf = self;

if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)])
{
self.interactivePopGestureRecognizer.delegate = weakSelf;
```
  self.delegate = weakSelf;
```
}
}

// Hijack the push method to disable the gesture

(void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]&&animated==YES){
// 防止在push下一个界面动画过程中，用户左侧手势返回，手势冲突造成的crash，先将侧滑关闭
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

{

// Enable the gesture again once the new controller is shown
if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]){
    // 页面加载完成后，将侧滑手势打开
    self.interactivePopGestureRecognizer.enabled = YES;
    if (self.viewControllers.count < 2 || self.visibleViewController == [self.viewControllers objectAtIndex:0]) {
        self.interactivePopGestureRecognizer.enabled = NO;
    }

}

}

-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
NSLog(@"123");

if (gestureRecognizer==self.interactivePopGestureRecognizer) {
    
    if (self.viewControllers.count < 2 || self.visibleViewController == [self.viewControllers objectAtIndex:0]) {
        return NO;
    }
}
return YES;

}
@end