UINavigationController使用

1,UINavigationController简介

          导航控制器，ios常用

          使用堆栈存储。根视图控制器在堆栈最底层。

 

[self.navigationController pushViewController:viewController animated:YES];   //入栈 进入viewController视图控制器
[self.navigationController popViewControllerAnimated:YES];  //出栈,返回上一个视图控制器
[self.navigationController popToViewController:UIViewController animated:YES];  //返回到指定的试图控制器
[self.navigationController popToRootViewControllerAnimated:YES];   //返回根控制器    

 

2,UINavigationController的结构组成

 

          UINavigationController由Navigation bar  ,Navigation View ,Navigation toobar等组成；     

 

3,UINavigationController的创建

             UINavigationController

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame: [UIScreen mainScreen].bounds];
    self.window.backgroundColor = [UIColor groupTableViewBackgroundColor];  
    ViewController *rootVC = [[ViewController alloc] init];
    UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController: rootVC];
    [self.window setRootViewController: navigation];
    [self.window makeKeyAndVisible];
    return YES;
}

 

4,UINavigationBar

               (1)默认NavigationBar

                  navigationBar--导航条，iOS7以后默认是透明的，iOS7以前默认是不透明的。

                  navigationBar在透明情况下，与contentView会重合一部分区域

                  navigationBar在不透明情况，ContentView跟在navigationBar下面

                  navigationBar竖屏下默认高度44，横屏下默认高度32

               (2)自定义NavigationBar

[self.navigationController.navigationBar setTranslucent: NO];    //显示出NavigationBar
self.navigationController.navigationBar.backgroundColor = [UIColor redColor]; // 设置导航条的颜色
[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"tupianName"] forBarMetrics:UIBarMetricsCompact];   //导航条加背景图片

               (3)自定义左侧按钮

- (void)viewDidLoad {
    [super viewDidLoad];
    // 自定义导航栏左侧按钮
    UIButton * leftBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    leftBtn.frame = CGRectMake(0, 10, 93, 30);
    leftBtn.backgroundColor = [UIColor orangeColor];
    [leftBtn addTarget:self action:@selector(onTap) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem * leftItem = [[UIBarButtonItem alloc] initWithCustomView:leftBtn];
    self.navigationItem.leftBarButtonItem = leftItem;
}

                (4)自定义右侧按钮    

                         与左侧按钮类似，区别在于：

self.navigationItem.rightBarButtonItem = rightItem;

                (5)自定义中间视图

UIView * centerView = [[UIView alloc] initWithFrame:CGRectMake(0, 10, 120, 30)];
centerView.backgroundColor = [UIColor greenColor];
self.navigationItem.titleView = centerView;

      

5,UINavigationToolbar

               (1)显示Toolbar

[self.navigationController setToolbarHidden:NO animated:YES] ;

               (2)在ToolBar上添加UIBarButtonItem

   UIBarButtonItem *camera=[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(ClickToolBarButton)];  
   [camera setWidth:80];  
   UIBarButtonItem *refresh=[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:@selector(ClickToolBarButton)];  
   [refresh setWidth:80];  
   UIBarButtonItem *reply=[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemReply target:self action:@selector(ClickToolBarButton)];  
   [reply setWidth:80];  
   UIBarButtonItem *compose=[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCompose target:self action:@selector(ClickToolBarButton)];  
   [compose setWidth:80];  
     
   UIBarButtonItem *splitspace=[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];  
     
   [self setToolbarItems:[NSArray arrayWithObjects:splitspace,camera,splitspace,refresh,splitspace,reply,splitspace,compose,splitspace, nil nil]];