//
//  UIViewController+BackButtonHandler.h

#import <UIKit/UIKit.h>

@protocol BackButtonHandlerProtocol <NSObject>
@optional
// 重写下面的方法以拦截导航栏返回按钮点击事件，返回 YES 则 pop，NO 则不 pop
- (BOOL)navigationShouldPopOnBackButton;
@end


@interface UIViewController (BackButtonHandler) <BackButtonHandlerProtocol>

@end
