先看示例程序：

完整代码如下：

AppDelegate.m

#import "AppDelegate.h"
#import "ViewController.h"
#import "SecondViewController.h"
@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    
    ViewController * vc = [[ViewController alloc]init];
    UINavigationController * nav = [[UINavigationController alloc]initWithRootViewController:vc];
    UITabBarController * tabBar = [[UITabBarController alloc]init];
    tabBar.viewControllers = @[nav];
    self.window.rootViewController = tabBar;
    //更改导航栏背景颜色（所有的导航栏都颜色变了，当然，这句话写在viewController的viewdidload中也可以）
    vc.navigationController.navigationBar.barTintColor = [UIColor yellowColor];
    
    return YES;
}

ViewController.m

#import "ViewController.h"
#import "SecondViewController.h"
@interface ViewController ()
@end

@implementation ViewController

-(id)init
{
    if (self = [super init]) {
        self.title = @"首页";
    }
    return self;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIButton * btn = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 200,40)];
    btn.center = self.view.center;
    btn.layer.cornerRadius = 10;
    btn.layer.masksToBounds = YES;
    btn.backgroundColor = [UIColor orangeColor];
    [btn setTitle:@"跳转到第二个页面" forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(clickJump) forControlEvents:UIControlEventTouchUpInside];
     [self.view addSubview:btn];
    
//    更改navigation字体颜色,(所有的都变成红色了,第一个是过时的写法，第二个是新写法)
//    [self.navigationController.navigationBar  setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor redColor] ,UITextAttributeTextColor, nil]];
    [self.navigationController.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor redColor]}];
    
//    系统自带的rightbarbuttonitem(带图片)[1]
    UIBarButtonItem* right = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"finish"] style:UIBarButtonItemStylePlain target:self action:@selector(right)];
    
//rightBarButtonItem也可以换成leftBarButtonItem
    self.navigationItem.rightBarButtonItem = right;
    
    
//    更改返回按钮颜色
    self.navigationController.navigationBar.tintColor = [UIColor purpleColor];
    
    
//    更改返回按钮标题
    UIBarButtonItem * backItem = [[UIBarButtonItem  alloc]init];
    backItem.title = @"返回";
    self.navigationItem.backBarButtonItem = backItem;
    
//    更改导航栏背景颜色（写在APPdelegate.m中也可以，但是下面两种写法的效果区别）[2]
//    self.navigationController.navigationBar.backgroundColor = [UIColor yellowColor];
//    self.navigationController.navigationBar.barTintColor = [UIColor yellowColor];
    
}

-(void)right
{
    NSLog(@"点击了右上角按钮");
}
-(void)clickJump
{
    [self.navigationController pushViewController:[[SecondViewController alloc]init] animated:YES];
}

@end

[1]注意：此处可以换成系统自带的，如：

 UIBarButtonItem * right = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(right)];
 

效果图：

也可以直接设置成文字的形式，如：

UIBarButtonItem * finish = [[UIBarButtonItem alloc]initWithTitle:@"完成" style:UIBarButtonItemStylePlain target:self action:@selector(finish)];

效果图：

[2]注意：

AppDelegate.m中没有XX.navigationController.navigationBar.backgroundColor = [UIColor yellowColor];这种写法，若把更改导航栏的颜色代码写在viewdidload中，则二者的直观区别和图层区别分别为：

 self.navigationController.navigationBar.backgroundColor = [UIColor yellowColor];

self.navigationController.navigationBar.barTintColor = [UIColor yellowColor];

显而易见，二者的颜色为何不一样，就是因为两种方法中，颜色层的位置不一致。

SecondViewController.m

#import "SecondViewController.h"
#import "ThirdViewController.h"
@interface SecondViewController ()

@end

@implementation SecondViewController

//页面跳转过后，底部的bottombar消失，返回上级页面，它会再次出现[3]
-(BOOL)hidesBottomBarWhenPushed
{
    return YES;
}
-(id)init
{
    if (self = [super init]) {
        self.title = @"第二个页面";
//        self.navigationItem.title = @"第二个页面";
    }
    return self;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColor whiteColor];
    
//    [self.navigationController.navigationBar  setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor greenColor] ,UITextAttributeTextColor, nil]];
    
//    更改右上角按钮
    UIBarButtonItem * finish = [[UIBarButtonItem alloc]initWithTitle:@"完成" style:UIBarButtonItemStylePlain target:self action:@selector(finish)];
    self.navigationItem.rightBarButtonItem = finish;
    
    UIButton * btn = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 200,40)];
    btn.center = self.view.center;
    btn.layer.cornerRadius = 10;
    btn.layer.masksToBounds = YES;
    btn.backgroundColor = [UIColor orangeColor];
    [btn setTitle:@"返回到第一个页面" forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(clickJump) forControlEvents:UIControlEventTouchUpInside];
     [self.view addSubview:btn];
       
}

-(void)clickJump
{
    NSLog(@"返回到第一页面");
    [self.navigationController popViewControllerAnimated:YES];
}
-(void)finish{
    NSLog(@"点击了完成按钮");
}


@end

[3]注意：若把

-(BOOL)hidesBottomBarWhenPushed
{
    return YES;
}

改成：

self.navigationController.hidesBottomBarWhenPushed = YES;

则，底部bottombar无论如何也不会消失
若改成：

self.tabBarController.tabBar.hidden = YES;

则，底部bottombar将在页面跳转后永远消失，即使返回上级页面也不会出现

多级页面跳转到指定页面的方法

for (UIViewController *controller in self.navigationController.viewControllers) {
            if ([controller isKindOfClass:[SecondViewController class]]) {
                [self.navigationController popToViewController:controller animated:YES];
            }
        }