從iOS7開始，系統(tǒng)為UINavigationController提供了一個(gè)interactivePopGestureRecognizer用于右滑返回(pop),但是，如果自定了當(dāng)前視圖控制器leftBarButtonItem，該手勢(shì)就失效了。

解決方法：自定義UINavigationController，實(shí)現(xiàn)其代理方法:

- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated;

如果push的是非根控制器，設(shè)置self.interactivePopGestureRecognizer.delegate = nil;。
如果是根控制器，將原來的代理重新設(shè)置即可。
具體代碼如下：

#import "LGNavigationController.h"

@interface LGNavigationController ()<UINavigationControllerDelegate>

@property (nonatomic,strong) id popDelegate;

@end

- (void)viewDidLoad {
    [super viewDidLoad];
    //代理    
    self.popDelegate = self.interactivePopGestureRecognizer.delegate;
    self.delegate = self;
}

#pragma UINavigationControllerDelegate方法
- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    //實(shí)現(xiàn)滑動(dòng)返回功能
    //清空滑動(dòng)返回手勢(shì)的代理就能實(shí)現(xiàn)
     self.interactivePopGestureRecognizer.delegate =  viewController == self.viewControllers[0]? self.popDelegate : nil;
}