多控制器navigationController代码

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
//    self.window = [[UIWindow alloc]init];
//
//    self.window.frame =[[UIScreen mainScreen]bounds];
   
    self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen]bounds]];
    self.window.backgroundColor = [UIColor greenColor];
   
    //UIViewController *vc = [[UIViewController alloc]init];
   
    //[self.window setRootViewController:vc];
    //创建一个导航控制器，并把一个ViewController设置成它的根控制器
    UINavigationController *navigation = [[UINavigationController alloc]initWithRootViewController:[[ViewController alloc]init]];
    //把导航控制器设置成window的根控制器
    self.window.rootViewController = navigation;
    //让window显示出来
    [self.window makeKeyAndVisible];
   
    return YES;

}

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.view.backgroundColor =[UIColor grayColor];
   
    self.navigationItem.title = @"第一个控制器";
   
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"查找" style:UIBarButtonItemStyleBordered target:self action:@selector(leftButtonClicked)];
   
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"添加" style:UIBarButtonItemStyleDone target:self action:@selector(rightButtonClicked)];
   
    //设置导航栏的返回按钮，这个按钮是给下一个导航进行控制器使用的，用来返回当前的控制器。这个按钮无法进行事件的响应
    self.navigationItem.backBarButtonItem =[[UIBarButtonItem alloc]initWithTitle:@"返回1" style:UIBarButtonItemStyleDone target:self action:@selector(backButtonClicked)];
}
-(void)backButtonClicked
{
    NSLog(@"返回按钮1点击了");
   
}
-(void)leftButtonClicked
{
    NSLog(@"查找点击了");

}
-(void)rightButtonClicked
{
    NSLog(@"添加点击了");
    SecondViewController *second = [[SecondViewController alloc]init];
   
    [self.navigationController pushViewController:second animated:YES];

}

- (void)viewDidLoad
{
    [super viewDidLoad];
   
    self.view.backgroundColor = [UIColor blackColor];
   
    self.navigationItem.title = @"第二个控制器";
   
    //self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"返回" style:UIBarButtonItemStyleBordered target:self action:@selector(leftButtonClicked)];
   
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"编辑" style:UIBarButtonItemStyleDone target:self action:@selector(rightButtonClicked)];
}
-(void)leftButtonClicked
{
    NSLog(@"返回点击了");
    [self.navigationController popViewControllerAnimated:YES];
   
}
-(void)rightButtonClicked
{
    NSLog(@"编辑点击了");
    ThirdViewController *thrid =[[ThirdViewController alloc]init];
   
    [self.navigationController pushViewController:thrid animated:YES];

}