iOS入门（三十二）UINavigationController

UINavigationController
作用：管理视图控制器
导航控制器继承于UIViewController，以栈的方式管理所控制的视图控制器 创建的时候需要用户提供一个视图控制器作为导航控制器的一个根视图控制器

pushViewController:animated //进入下一个视图控制器

popViewControllerAnimated //返回上一个视图控制器

popToViewController:animated //返回到指定的视图控制器

popToRootViewControllerAnimated //返回到根视图控制器

定制UINavigationBar

ois7默认的navigationBar 高度是64

如果将navigationBar的透明度关闭，navigationBar的高度将会变为44

修改UINavigationBar的背景图片，背景颜色 UINavigationItem的使用

传值（第二个视图控制器获得第一个视图控制器的部分信息：

属性传值

单例传值（类只有一个实例，也是一种常用的设计模式）

代理传值

- (void)viewDidLoad

{

[super viewDidLoad];

// Do any additional setup after loading the view.

//设置导航栏不透明

[self.navigationController.navigationBar setTranslucent:NO];

self.title = @"标题";

// //设置导航栏样式

// [self.navigationController.navigationBar setBarStyle:UIBarStyleBlack];

// //设置导航栏颜色

// [self.navigationController.navigationBar setBarTintColor:[UIColor orangeColor]];

// [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"1.bmp"] forBarMetrics:UIBarMetricsDefault];

//设定导航栏上的视图back 只会取其样式 不去我设的功能

// self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"你猜" style: UIBarButtonItemStylePlain target:self action:@selector(buttonClicked:)];

self.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:[[UIBarButtonItem alloc] initWithTitle:@"AAA" style:UIBarButtonItemStylePlain target: self action:@selector(buttonClicked:)],[[UIBarButtonItem alloc] initWithTitle:@"AAA" style:UIBarButtonItemStylePlain target: self action:@selector(buttonClicked:)], nil];

UIButton * label = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 50)];

label.backgroundColor = [UIColor cyanColor];

[label addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];

//titleView本身是一个空指针，必须设置个东西给它，让这个指针去指向它

NSLog(@"%@",self.navigationItem.titleView);

self.navigationItem.titleView = label;

[label release];

UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];

button.frame = CGRectMake(20, 20, 200, 150);

button.backgroundColor = [UIColor greenColor];

[button setTitle:@"嘻嘻，我是按钮" forState:UIControlStateNormal];

[button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:button];

}

- (void)buttonClicked:(UIButton *)button

{

//2.创建一个要入栈的视图控制器

SecondViewController *secondController = [[SecondViewController alloc] init];

//3.获得当前的navigationController，利用它推出新的视图控制器

[self.navigationController pushViewController:secondController animated:YES];

[secondController release];

}

- (void)viewDidLoad

{

[super viewDidLoad];

// Do any additional setup after loading the view.

self.view.backgroundColor = [UIColor colorWithRed:0.3 green:0.1 blue:0.6 alpha:0.6];

[self.navigationController.navigationBar setTranslucent:NO];

self.title = @"四大美女";

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"BBB" style:UIBarButtonItemStylePlain target:self action:@selector(buttonClicked:)];

// UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];

// button.frame = CGRectMake(50, 150, 200, 150);

// button.backgroundColor = [UIColor yellowColor];

// [button setTitle:@"我也是按钮" forState:UIControlStateNormal];

// [button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];

// [button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];

// [self.view addSubview:button];

UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(20, 20, 250, 100)];

label.backgroundColor = [UIColor yellowColor];

[self.view addSubview:label];

[label release];

}

- (void)buttonClicked:(UIButton *)button

{

ThirdViewController * thirdController = [[ThirdViewController alloc] init];

[self.navigationController pushViewController:thirdController animated:YES];

[thirdController release];

}

- (void)viewDidLoad

{

[super viewDidLoad];

// Do any additional setup after loading the view.

[self.navigationController.navigationBar setTranslucent:NO];

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"DDD" style:UIBarButtonItemStylePlain target:self action:@selector(buttonClicked:)];

self.view.backgroundColor = [UIColor grayColor];

UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];

button.frame = CGRectMake(50, 150, 200, 150);

button.backgroundColor = [UIColor blackColor];

[button setTitle:@"按钮。。按钮" forState:UIControlStateNormal];

[button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:button];

}

- (void)buttonClicked:(UIButton *)button

{

//返回到根视图控制器

// [self.navigationController popToRootViewControllerAnimated:YES];

//返回上一个视图控制器

// [self.navigationController popViewControllerAnimated:YES];

//返回到栈内的某一个视图

// UIViewController * vc = [self.navigationController.viewControllers objectAtIndex:1];

// [self.navigationController popToViewController: vc animated:YES];

FiveViewController * fiveController = [[FiveViewController alloc] init];

[self.navigationController pushViewController:fiveController animated:YES];

[fiveController release];

}