iPhone实现app中右拖动屏幕返回上一层的效果（继承UINavigationController）

// // AppDelegate.h // MyNavigation // // Created by iHope on 13-8-16. // Copyright (c) 2013年 iHope. All rights reserved. // #import <UIKit/UIKit.h> @class ViewController; @interface AppDelegate : UIResponder <UIApplicationDelegate> @property (strong, nonatomic) UIWindow *window; @property (strong, nonatomic) ViewController *viewController; @end