【iOS基础控件 -15 - 3 】Modal

 1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 2     // Override point for customization after application launch.
 3    
 4     // 设置window
 5     self.window = [[UIWindow alloc] init];
 6     self.window.backgroundColor = [UIColor grayColor];
 7     self.window.frame = [[UIScreen mainScreen] bounds];
 8     [self.window makeKeyAndVisible];
 9    
10     // 创建一个UIView
11     UIViewController *viewController = [[UIViewController alloc] init];
12     viewController.view.backgroundColor = [UIColor redColor];
13     UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(100, 100, 200, 50)];
14     [button setTitle:@"弹出modal" forState:UIControlStateNormal];
15     [button addTarget:self action:@selector(popToModal) forControlEvents:UIControlEventTouchUpInside];
16    
17     [viewController.view addSubview:button];
18     self.window.rootViewController = viewController;
19    
20     return YES;
21 }
22 
23 - (void) popToModal {
24     UIViewController *viewController = self.window.rootViewController;
25    
26     // 再创建一个UIView用来切换
27     UIViewController *modalViewController = [[UIViewController alloc] init];
28     modalViewController.view.backgroundColor = [UIColor blueColor];
29    
30     // 创建一个NavigationController来包装
31     UINavigationController *naviController = [[UINavigationController alloc] initWithRootViewController:modalViewController];
32     modalViewController.navigationItem.title = @"蓝色";
33    
34     // 切换到navigationController
35     [viewController presentViewController:naviController animated:YES completion:^{
36         NSLog(@"完成modal切换");
37     }];
38 }

1 - (IBAction)goback:(UIBarButtonItem *)sender {
2     // 关闭modal
3     // 1.可以使用自己
4 //    [self dismissViewControllerAnimated:YES completion:nil];
5    
6     // 2.也可以使用上一层的navigation controller
7     [self.navigationController dismissViewControllerAnimated:YES completion:nil];
8 }

 1 /*
 2 * 在这里传输数据给modal控制器
 3 * 顺传，使用控制器
 4 */
 5 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
 6     // 1.取得modal转向的controller，这里是中间的navigation controller
 7     UINavigationController *nvController =  (UINavigationController *)segue.destinationViewController;
 8    
 9     // 2.取得modal最终显示的controller, 就是最后的UIViewController
10     GreenViewController *greenController = (GreenViewController *)nvController.topViewController;
11    
12     // 3.传输数据
13     greenController.name = @"我就是一个modal窗口";
14 }