No.06 Xcode(5.1.x) UINavigationController

1.在iOS7.0以上版本中, 如果UINavigationController作为UIWindow的根控制器, 顶部的导航栏会包含状态栏, 并且UINavigationController包含的子视图默认左上角与状态栏左上角对齐, 需要将translucent设置为NO才正常.

2.加入的子控制器, 都包含在childViewControllers属性中, 可以作为只读属性来查, 但是最好不要去更改它, 请用UINavigationController的接口去更改子视图

3.navigationBar是顶部的导航栏, 但是如果想要通过navigationBar.frame来获取导航栏的区域, 是不可行的, 通常使用硬编码来获取这个值:

• 纵向模式为44像素;
• 横向模式为32像素;
• 提示模式为74像素(横向和纵向);

4.导航栏的左右键定制时, 建议使用[initWithCustomView:]方法, [initWithBarButtonSystemItem: target: action:]等方法难以定制按钮的外形

5.使用[pushViewController: animated:]等方法弹出或加入视图时, 可以将animated参数设置为NO, 然后在navigationController.view.layer上建立自定义动画

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创建导航栏

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    ViewController* controller = [[ViewController alloc] init];        UINavigationController* naviController = [[UINavigationController alloc] initWithRootViewController:controller];    naviController.navigationBar.translucent = YES;    naviController.navigationBar.titleTextAttributes = [NSDictionary dictionaryWithObjectsAndKeys: [UIColor whiteColor], NSForegroundColorAttributeName, [UIFont systemFontOfSize:20.0], NSFontAttributeName, nil]; // 设置字体    [naviController.navigationBar setBackgroundImage:[UIImage imageNamed:@"Ingredients/bg003.png"] forBarMetrics:UIBarMetricsDefault]; // 设置背景    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];    self.window.rootViewController = naviController;    self.window.backgroundColor = [UIColor whiteColor];    [self.window makeKeyAndVisible];    return YES;}

定制导航栏

- (void)viewDidLoad{    [super viewDidLoad];        // 定制右键    UIButton* rtButton = [[UIButton alloc] initWithFrame:CGRectMake(0.0, 0.0, 80.0, 20.0)];    [rtButton setBackgroundColor:[UIColor grayColor]];    [rtButton setTitle:@"普通" forState:UIControlStateNormal];    [rtButton setTitle:@"高亮" forState:UIControlStateHighlighted];    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:rtButton];}

加入或弹出

- (void)popToPrev:(UIButton*)button{    CATransition* transition = [CATransition animation];    transition.duration = 1.0;    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];    transition.type = @"cube";    transition.subtype = kCATransitionFromLeft;    transition.delegate = self;    [self.navigationController.view.layer addAnimation:transition forKey:@"animationxxxx"];        [self.navigationController popViewControllerAnimated:NO];}- (void)popToSome:(UIButton*)button{    UIViewController* controller = [self.navigationController.childViewControllers objectAtIndex:0];    [self.navigationController popToViewController:controller animated:YES];}- (void)popToRoof:(UIButton*)button{    [self.navigationController popToRootViewControllerAnimated:YES];}