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]];