1.创建一个UINavigationController
self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
FirstViewController * first = [[FirstViewController alloc]init];
UINavigationController * nav = [[UINavigationController alloc]initWithRootViewController:first]; UINavigationController第一个显示的界面
self.window.rootViewController = nav;
[self.window makeKeyAndVisible];
2.隐藏导航栏工具栏
self.navigationController.navigationBarHidden = YES;
self.navigationController.toolbarHidden = NO;
3.设置导航栏和工具栏的颜色（设置了之后所有都是这个颜色，因为只有一个navigationController）
self.navigationController.toolbar.barTintColor = [UIColor redColor];
self.navigationController.navigationBar.barTintColor = [UIColor redColor];
4.设置左右显示的按钮
UIBarButtonItem * leftBtn = [[UIBarButtonItem alloc]initWithTitle:@"Cancel" style:UIBarButtonItemStyleDone target:nil action:nil];
self.navigationItem.leftBarButtonItem = leftBtn;
self.navigationItem.leftBarButtonItem.tintColor = [UIColor whiteColor];
UIBarButtonItem * rightBtn = [[UIBarButtonItem alloc]initWithTitle:@"Next" style:UIBarButtonItemStyleDone target:self action:@selector(gotoSecondView)];
self.navigationItem.rightBarButtonItem = rightBtn;
self.navigationItem.rightBarButtonItem.tintColor = [UIColor whiteColor];
5.设置标题
self.navigationItem.title =@"标题";
6.标题位置设置成view
UIView * view = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 100, 44)];
view.backgroundColor = [UIColor yellowColor];
self.navigationItem.titleView = view;
7.Next按钮响应第二个界面
-(void)gotoSecondView{
SecondViewController * svc = [[SecondViewController alloc]init];
//设置默认提供的返回按钮的标题
UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStyleDone target:nil action:nil];
self.navigationItem.backBarButtonItem = backItem;
//present：在现有的界面上盖上一层 dismissViewController来消除
//[self.navigationController presentViewController:svc animated:YES completion:nil];
//push：push入栈 pop出栈来消除
[self.navigationController pushViewController:svc animated:YES];
}