多控制器管理

UINavigationController *nav = [[UINavigationController alloc] init];

CTOneViewController *one = [[CTOneViewController alloc] init];

//方法一

[nav pushViewController:one animated:YES]; 

//方法二

[nav addChildViewController:one];

//方法三

nav.viewControllers = @[one];

//方法四

[nav showViewController:one sender:nil];

//方法一：撤销当前栈顶控制器，返回上一个控制器

[self.navigationController popViewControllerAnimated:YES];

//方法二：popToViewController撤销到指定控制器，只能传递栈中控制器

CTTwoViewController *vc = self.navigationController.viewControllers[1];

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

//方法三：直接返回到栈底控制器

UIBarButtonItem *buttonItem1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemPlay target:selfaction:@selector(Back:)];

UIBarButtonItem *buttonItem2 = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"zhongguo"] style:UIBarButtonItemStyleDone target:self action:@selector(Back:)];

UIBarButtonItem *buttonItem3 = [[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStyleDone target:selfaction:@selector(Back:)];

self.navigationItem.leftBarButtonItem = buttonItem1;

self.navigationItem.leftBarButtonItems = @[buttonItem1, buttonItem2, buttonItem3];

传递参数

@property (nonatomic, readonly) NSString *identifier;//唯一标识

@property (nonatomic, readonly) id sourceViewController;//来源控制器

@property (nonatomic, readonly) id destinationViewController;//目标控制器

[self performSegueWithIdentifier:@"login2contacts" sender:nil];

//直接赋值

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

{

   CTContactsTableViewController *contact = segue.destinationViewController;

   contact.navigationItem.title = [NSString stringWithFormat:@"%@的通讯录", self.textAccount.text];

}

//在执行跳转前，当前控制器在调用prepareForSegue方法后成为目标控制器的代理

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

{

   CTAddViewController * addViewController = (CTAddViewController *)segue.destinationViewController;

   addViewController.delegage = self;

}

//实现目标控制器代理中的方法，可获取数据并触发相应的操作

- (void)addViewControllerBtnSave:(CTAddViewController *)addViewController

{

   CTContact *contact = addViewController.contact;

   [self.contacts addObject:contact];