以一个UINavigationController作为根视图控制器，然后通过pushViewController函数实现多级跳转，以及通过popViewControllerAnimated函数跳到上一个视图界面，popToViewController函数跳到指定视图界面，popToRootViewControllerAnimated函数跳到根视图界面。

这种情况下一般用UINavigationController作为window的跟视图控制器，并以一个ViewController作为UINavigationController的根视图控制器，这样ViewController就可以自由添加导航条并进行各种设置了，这里ViewController是一个UITableViewController：

一.导航视图UINavigationController

-(BOOL)application:(UIApplication *)applicationdidFinishLaunchingWithOptions:(NSDictionary *)launchOptions{//初始化windowself.window = [[UIWindow alloc]init];// window跟屏幕一样大self.window.frame = [UIScreenmainScreen].bounds;// window背景色self.window.backgroundColor = [UIColorwhiteColor];//表格菜单MainTableViewController *mainVC =[[MainTableViewController alloc] init];//根导航UINavigationController *rootNavVC =[[UINavigationController alloc]initWithRootViewController:mainVC];//跟导航作为window的跟控制器self.window.rootViewController =rootNavVC;return YES;
}

之后在ViewController中的viewDidLoad函数中就可以添加导航栏的各种设置了，标题，按钮等：

- (void)viewDidLoad{[super viewDidLoad];//标题self.title = @"蒋信厚的Demo";//导航条按钮组件self.navigationItem.rightBarButtonItem =[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:selfaction:@selector(selector)];//导航栏背景色self.navigationController.navigationBar.backgroundColor = [UIColororangeColor];//导航栏按钮组件的颜色self.navigationController.navigationBar.tintColor = [UIColorredColor];//标题颜色[self.navigationController.navigationBarsetTitleTextAttributes:@{NSFontAttributeName:[UIFontsystemFontOfSize:15],NSForegroundColorAttributeName:[UIColorwhiteColor]}];}

导航视图下的页面跳转

[self.navigationControllerpushViewController:newViewController animated:YES];// 获取当前视图控制器的index
NSInteger index= [self.navigationController.viewControllersindexOfObject:self];//根据index获取历史视图SLPatientDataController*diseaseVC= [self.navigationController.viewControllersobjectAtIndex:index-1];
[self.navigationControllerpopToViewController:diseaseVCanimated:YES];[self.navigationControllerpopToRootViewControllerAnimated:YES];

2.底部导航条UITabBarController：

典型的底部导航结构如下，UITabBarController内放置多个自定义的UINavigationController,同时将每个子页面的根视图UIViewController作为导航视图UINavigationController的rootViewController,从而实现底部导航视图的分栏导航和每一栏里面的多级跳转：

三级类的示例如下：

UITabBarController

//
//  MainTabBarController.h
//  JXHDemo
//
//  Created by Xinhou Jiang on 16/7/21.
//  Copyright © 2016年 Jiangxh. All rights reserved.
//#import <UIKit/UIKit.h>@interface MainTabBarController : UITabBarController@end

//
//  MainTabBarController.m
//  JXHDemo
//
//  Created by Xinhou Jiang on 16/7/21.
//  Copyright © 2016年 Jiangxh. All rights reserved.
//#import "MainTabBarController.h"
#import "TabNavController.h"
#import "MainTableViewController.h"
#import "FoundationViewController.h"
#import "MyDemoViewController.h"@interface MainTabBarController ()@end@implementation MainTabBarController- (void)viewDidLoad {[super viewDidLoad];// 1.UIKitMainTableViewController *uikitVC = [[MainTableViewController alloc]init];[self addTabBarChildVC:uikitVC title:@"UIKit" icon:@"tabbar_home"];// 2.FoundationFoundationViewController *foundationVC = [[FoundationViewController alloc]init];[self addTabBarChildVC:foundationVC title:@"Foundation" icon:@"tabbar_home"];// 3.DemoMyDemoViewController *demoVC = [[MyDemoViewController alloc]init];[self addTabBarChildVC:demoVC title:@"Demo" icon:@"tabbar_home"];// 底部导航栏选中后的文字颜色self.tabBar.tintColor = RGBColor(28, 190, 164);
}/***  添加tabbar子控制器*/
- (void) addTabBarChildVC:(UIViewController*)childVC title:(NSString *)title icon:(NSString *)icon {// 导航跟控制器TabNavController *navController = [[TabNavController alloc]initWithRootViewController:childVC];// 底部导航标题navController.tabBarItem.title = title;// 底部导航图标navController.tabBarItem.image = [UIImage imageNamed:icon];// 将当前子控制器添加到底部导航控制器[self addChildViewController:navController];
}@end

UINavigationController

//
//  TabNavController.h
//  JXHDemo
//
//  Created by Xinhou Jiang on 16/7/21.
//  Copyright © 2016年 Jiangxh. All rights reserved.
//#import <UIKit/UIKit.h>@interface TabNavController : UINavigationController@end

//
//  TabNavController.m
//  JXHDemo
//
//  Created by Xinhou Jiang on 16/7/21.
//  Copyright © 2016年 Jiangxh. All rights reserved.
//#import "TabNavController.h"@interface TabNavController ()@end@implementation TabNavController- (void)viewDidLoad {[super viewDidLoad];// 顶部导航栏的背景色self.navigationBar.barTintColor = RGBColor(28, 190, 164);// 导航栏标题文字颜色和大小[self.navigationBar setTitleTextAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:20.0],NSForegroundColorAttributeName:[UIColor whiteColor]}];
}@end

UIViewController

自定义。

效果如下：