1     // 1.创建window对象并设置为屏幕大小
 2     self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
 3     
 4     // 2.设置window的背景颜色
 5     self.window.backgroundColor = [UIColor whiteColor];
 6     // 3.显示window
 7     [self.window makeKeyAndVisible];
 8     
 9     // 4.设置根视图控制器
10     
11     // 设置导航控制器(第一个入栈的控制器,也就是第一个显示的控制器)
12     UINavigationController *rootNav = [[UINavigationController alloc] initWithRootViewController:[[RootViewController alloc] init]];
13     
14     self.window.rootViewController = rootNav;

 1    // 导航控制器的显隐属性 YES是隐藏, NO为显示
 2     self.navigationController.navigationBarHidden = NO;
 3     
 4     // NavigationBar (导航条)
 5     // 设置导航条是否开启半透明效果(iOS7.0之后,默认是开启的)
 6     // 当半透明效果开启时,self.view以屏幕左上角为坐标原点; 关闭时,以导航条左下角为坐标原点
 7     self.navigationController.navigationBar.translucent = NO;
 8     
 9 //    UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(0, 20, kWidth, 44)];
10 //    
11 //    myView.backgroundColor = [UIColor redColor];
12 //    
13 //    [self.view addSubview:myView];
14     
15     // 修改导航条的颜色
16     self.navigationController.navigationBar.barTintColor = [UIColor blackColor];
17     
18     // 设置导航元素的颜色
19     self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
20     
21     // 导航栏的样式
22     self.navigationController.navigationBar.barStyle = UIBarStyleBlack;
23     
24     // 设置导航条标题
25     self.title = @"根视图";

 1     // navigationItem 属性 用于设置子控件
 2     self.navigationItem.title = @"根视图";
 3     
 4     // 左按钮
 5 //    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:self action:@selector(leftButtonAction:)];
 6     
 7     self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(leftButtonAction:)];
 8     
 9     // 右按钮
10     self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"前进" style:UIBarButtonItemStylePlain target:self action:@selector(rightButtonAction:)];
11     
12 //    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(rightButtonAction:)];
13     
14 //    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"next"] style:UIBarButtonItemStylePlain target:self action:@selector(rightButtonAction:)];

1 　　 UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(rightButtonAction:)];
2     
3     UIBarButtonItem *item2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:self action:@selector(rightButtonAction:)];
4     
5     // 右按钮数组
6     self.navigationItem.rightBarButtonItems = @[item1, item2];

1     // 标题视图
2     UISegmentedControl *segment = [[UISegmentedControl alloc] initWithItems:@[@"nan", @"nv", @"-1"]];
3     
4     segment.frame = CGRectMake(0, 0, 180, 30);
5     
6     segment.selectedSegmentIndex = 0;
7     // 将分组添加到标题视图上
8     self.navigationItem.titleView = segment;

 1     // 跳到第一页,使用压栈的方法
 2     [self.navigationController pushViewController:firstVC animated:YES];
 3     
 4     // pop 掉最上面的 ViewController
 5     [self.navigationController popViewControllerAnimated:YES];
 6 
 7     // pop 掉 viewControllers 数组中对应的 viewController上的视图, 可以跳到任意一个 viewController
 8     // viewControllers 所有处于栈中的控制器,使用数组保存
 9     [self.navigationController popToViewController:self.navigationController.viewControllers[0] animated:YES];
10 
11     // 将除了RootViewController之外的所有Controller从栈区pop
12     [self.navigationController popToRootViewControllerAnimated:YES];

 1 // 按钮的点击事件
 2 [pushBtn addTarget:self action:@selector(pushBtnClick:) forControlEvents:UIControlEventTouchUpInside];
 3 (viewDidLoad方法中)
 4 
 5 
 6 // 点击事件实现
 7 - (void)pushBtnClick:(UIBarButtonItem *)sender
 8 {
 9     // 创建要跳转到的界面的对象
10     SecondViewController *secondVC = [[SecondViewController alloc] init];
11     
12     // 使用push跳转到下一页
13     [self.navigationController pushViewController:secondVC animated:YES];
14 }

1 // 按钮点击事件
2 [popBtn addTarget:self action:@selector(popBtnClick:) forControlEvents:UIControlEventTouchUpInside];
3 (viewDidLoad方法中)
4 
5 - (void)popBtnClick:(UIBarButtonItem *)sender
6 {
7     // pop到上一页
8     [self.navigationController popViewControllerAnimated:YES];
9 }

 1 // 点击事件的实现
 2 - (void)showBtnClick:(UIButton *)sender
 3 {
 4     // 创建要跳转的页面
 5     ShowViewController *showVC = [[ShowViewController alloc] init];
 6     
 7     // 以要跳转的页面为根视图控制器创建导航控制器
 8     UINavigationController *showNAV = [[UINavigationController alloc] initWithRootViewController:showVC];
 9     
10     // UIModalTransitionStylePartialCurl 翻页方式 推出
11     // UIModalTransitionStyleFlipHorizontal 水平旋转方式 推出
12     // UIModalTransitionStyleCrossDissolve 交叉叠化溶解方式 推出
13     // UIModalTransitionStyleCoverVertical 垂直覆盖方式 推出
14     
15     // 设置模态的样式(只有上述的4种,如果有需要可以自己编写)
16     showVC.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
17     // 模态跳转到下一页
18     [self presentViewController:showNAV animated:YES completion:nil];
19 }

1 // 按钮点击事件
2 - (void)goBackBtnClick:(UIButton *)sender
3 {
4     // 模态返回到上一页
5     [self dismissViewControllerAnimated:YES completion:nil];
6 }