UI 常用方法总结之---UINavigationController

UINavigationController : UIViewController

1.创建UINavigationController对象

UINavigationController *navCV = [[UINavigationController alloc]initWithRootViewController:mainVC]; 

通常和

self.window.rootViewController = navCV;

连用

2.- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated; 

推出第二个页面

eg:[self.navigationController pushViewController:secondVC animated:YES];

3.- (UIViewController *)popViewControllerAnimated:(BOOL)animated; 

返回上一视图

eg:[self.navigationController popViewControllerAnimated:YES];

4.- (NSArray *)popToViewController:(UIViewController *)viewController animated:(BOOL)animated; 

返回指定视图

eg:获得viewController的栈

    UIViewController *viewC = [self.navigationController.viewControllers objectAtIndex:0];

    [self.navigationController popToViewController:viewC animated:YES];

5.- (NSArray *)popToRootViewControllerAnimated:(BOOL)animated; 

返回根视图

eg:[self.navigationController popToRootViewControllerAnimated:YES];

UINavigationItem : NSObject <NSCoding>

每个页面要显示在导航栏上的内容(标题,两边按钮信息)

1.rightBarButtonItem

创建导航栏右边按钮

参数1 选择一个系统提供的图标信息

eg:self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:@selector(button:)]autorelease];

2.leftBarButtonItem

创建导航栏左边按钮

eg:self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"iconfont-yinle.png"] style:UIBarButtonItemStylePlain target:self action:@selector(button:)]autorelease];

3.hidesBackButton

隐藏返回按钮

eg:self.navigationItem.hidesBackButton = YES;

4.titleView

标题相关设置

eg:self.navigationItem.titleView = [[[UISegmentedControl alloc]initWithItems:@[@"111",@"222"]]autorelease];

UINavigationbar

1.translucent

是否透明

eg:self.navigationController.navigationBar.translucent = YES;

2.barTintColor

bar的颜色eg:self.navigationController.navigationBar.barTintColor = [UIColor grayColor];

3.setNavigationBarHidden

隐藏bar

e.g.:[self.navigationController setNavigationBarHidden:NO];

4.automaticallyAdjustsScrollViewInsets

取消掉scrollView的系统设置的UIEdgeInsets

e.g.:elf.automaticallyAdjustsScrollViewInsets = YES;

(当页面出现不可预知问题时可以尝试使用这个开关)

5.setBackgroundImage

设置bar背景图片

eg：[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"2.png"] forBarMetrics:UIBarMetricsDefault];