ios navigationController代码创建

1.新建类文件FirstViewController，subClass of：UIViewController

2.新建类文件MYNavigationController，subClass of：UINavigationController

3.AppDelegate.m中包含以上两个头文件，然后在didFinishLaunchingWithOptions写

FirstViewController *viewController = [[FirstViewController alloc]initWithNibName:nil bundle:nil];

MYNavigationController *navigationController = [[MYNavigationController alloc]initWithRootViewController:viewController];

self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen] bounds]];

self.window.rootViewController = navigationController;

self.window.backgroundColor = [UIColor whiteColor];

[self.window makeKeyWindow];

return YES;

4.返回按钮设置

//返回按钮

UIBarButtonItem *Return = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemReply target:self action:@selector(pop)];

self.navigationItem.leftBarButtonItems = @[Return];