UINavigationController

UINavigationController (导航控制器)

1. 常用的视图控制器
2. 以栈的形式管理视图控制器 先进后出
3. 创建Navigation 会出现导航栏 (导航栏44 + 状态栏20 = 64)

self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
ViewController *vc = [[ViewController alloc] init];
UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:vc];
self.window.rootViewController = navigation;
return YES;


// 1. 以下两种方法都能设置viewController的标题
self.title = @"sure";
self.navigationItem.title = @"cancel";
// 2. 标题视图 (修改x y对视图本身没有影响)
UISegmentedControl *segment =     [[UISegmentedControl alloc] initWithItems:@[@"难受",   @"难受的要死"]];
segment.frame = CGRectMake(0, 0, 150, 44);
self.navigationItem.titleView = segment;
// 3. 设置导航栏左右侧的按钮
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"难受" style:UIBarButtonItemStylePlain target:self action:@selector(back:)];

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(add:)];
// 4. 同时在导航栏创建多个button
UIBarButtonItem *barButton1 = [[UIBarButtonItem   alloc] initWithTitle:@"难受" style:UIBarButtonItemStylePlain target:self     action:@selector(back:)];
UIBarButtonItem *barButton2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(add:)];
self.navigationItem.leftBarButtonItems =   @[barButton1, barButton2];
// 5. navigationBar的隐藏
self.navigationController.navigationBarHidden = NO;
self.navigationController.navigationBar.hidden =   NO;
// 6. barStyle
self.navigationController.navigationBar.barStyle = 0;
// 7. 背景颜色
// self.navigationController.navigationBar.backgroundColor = [UIColor cyanColor];
self.navigationController.navigationBar.barTintColor = [UIColor cyanColor];
// 8. 导航栏元素的颜色
self.navigationController.navigationBar.tintColor = [UIColor blackColor];
// 9. 设置为半透明
UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
button.backgroundColor = [UIColor blackColor];
button.frame = CGRectMake(0, 0, 200, 200);
[button setTitle:@"难受死我了" forState:UIControlStateNormal];
[button addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
// 10. 当设置非半透明时 button的坐标向下平移64
self.navigationController.navigationBar.translucent = NO;
// self.edgesForExtendedLayout = UIRectEdgeNone; // 与translucent为no时的效果一样

// push和pop来完成页面之间的跳转

SecViewController *sec = [[SecViewController alloc] init];
[self.navigationController pushViewController:sec animated:YES];

[self.navigationController popToRootViewControllerAnimated:YES];