代码中创建：

1、appdelegate 该contoller放置controller下一个

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];        self.window.rootViewController = [[MJOneViewController alloc] init];        [self.window makeKeyAndVisible];    return YES;}

2、oneViewController跳转的action

拿到要跳转的控制器的，然后通过当前的controller 来 调用 presentViewController

- (IBAction)jump {    // 展示MJTwoViewController    MJTwoViewController *two = [[MJTwoViewController alloc] init];        UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:two];        [self presentViewController:nav animated:YES completion:^{        NSLog(@"展示MJTwoViewController完成.......");    }];}

3、twoController 返回之前的controller

调用 dismissViewController方法

- (IBAction)cancel {//    NSLog(@"%@", self.view.window.rootViewController);//    NSLog(@"%@", self.view.window.subviews);    [self dismissViewControllerAnimated:YES completion:^{        NSLog(@"关闭MJTwoViewController....");    }];//    [self.navigationController dismissViewControllerAnimated:YES completion:^{//        NSLog(@"关闭MJTwoViewController....");//    }];}

在storyBoard创建modal控制器也非常方便。直接ctrl  右键点击 选举moadal状态

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