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我有一个登录视图控制器，它向服务器发出请求以进行身份​​验证。一旦成功，我希望当前视图控制器成为我的应用程序的主页选项卡视图控制器。我确实尝试使用 pushViewController:viewController 或 presentModalViewController 或dismissModalViewControllerAnimated。没有任何效果。您可以查看提供的屏幕截图以了解我的应用程序流程。

这是一些示例代码：

- (IBAction)facebookLoginButtonClick:(id)sender {

// get the app delegate so that we can access the session property
AppDelegate *appDelegate = [[UIApplication sharedApplication]delegate];

// this button's job is to flip-flop the session from open to closed
if (appDelegate.session.isOpen) {
    // if a user logs out explicitly, we delete any cached token information, and next
    // time they run the applicaiton they will be presented with log in UX again; most
    // users will simply close the app or switch away, without logging out; this will
    // cause the implicit cached-token login to occur on next launch of the application
    [appDelegate.session closeAndClearTokenInformation];

} else {
    if (appDelegate.session.state != FBSessionStateCreated) {
        // Create a new, logged out session.
        appDelegate.session = [[FBSession alloc] init];
    }

    // if the session isn't open, let's open it now and present the login UX to the user
    [appDelegate.session openWithCompletionHandler:^(FBSession *session,
                                                     FBSessionState status,
                                                     NSError *error) {
        // and here we make sure to update our UX according to the new session state
        [self dismissModalViewControllerAnimated:YES];
        UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle: nil];
        MainViewTabBarController *viewController = (MainViewTabBarController*)[mainStoryboard instantiateViewControllerWithIdentifier: @"mainPageTabBarId"];
        [[self navigationController] presentModalViewController:viewController animated:YES];
    }];
}

}

在此处输入图像描述

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1 回答 1

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找出解决方案。我应该更改应用程序委托中的 rootViewController，而不是推送模型视图控制器。它运作良好。感谢大家的帮助。

于 2012-09-27T17:40:01.933 回答