Ipad presentModalViewController over an ViewController

Question

我有ViewController(Passwordviewcontroller)，我想用"presentModalviewController"来显示

我有一个AppDeleage:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;
}

这里是我的ViewController，我想从PasswordviewController显示:

-ViewDidLoad
{
    self.passwordView = [[PasswordView alloc]initWithNibName:@"PasswordView" bundle:nil];
    [passwordView setModalPresentationStyle:UIModalPresentationFullScreen];
    [self presentModalViewController:passwordView animated:YES];
}

我什么都试过了，但还是不行，有人有主意吗?

Answer 1

把这个放在viewDidAppear而不是viewDidLoad。在viewDidLoad中，视图可能会加载到内存中，但不必在屏幕上显示。另一方面，在viewDidAppear中，您的视图已准备好显示并以这样一种方式正确插入窗口，您可以显示模态视图。

编辑:根据注释将viewWillAppear更改为viewDidAppear