UINavigationController

1。操作：push view controllers onto a stack（进栈） , pop them from stack（出栈）

2。初始化：

myNavigationController = [ [ UINavigationController  alloc ] initWithRootViewController : myViewController ] ;

self.window = [ [ UIWindow alloc ] initWithFrame : [ [ UIScreen mainScreen ] bounds ] ] ;

self.window.rootViewController = myNavigationController ;

3。跳转：

[ self.navigationController  pushViewController : theOtherViewController  animated : YES ] ;  // 去

[ self.navigationController  popViewControllerAnimated :  YES ] ;  //回

4。属性：

NSArray  *controllers = self.navigationController.viewControllers ; // 获取关联的所有viewControllers

NSMutableArray *newControllers = [ NSMutableArray  arrayWithArray :  controllers ] ;

[ newControllers  removeLastObject ] ;  //对可变数组进行操作，如添，删，等 

[ self.navigationController  setViewControllers : newControllers  animated : YES ] ; //设置新的viewControllers

p.s. 添加事件：

[ myButton  addTarget : self  action : @selector ( methodName )

forControlEvents : eventName ] ; //UIControlEventTouchUpInside, 。。。

延时执行：

[ self  performSelector : @selector (methodName ) withObject : nil  afterDelay : second ] ;