ios - 在dismissViewControllerAnimated 之后的presentViewController

Question

我试图在关闭 View Controller 后呈现 View Controller ( SLServiceTypeFacebook )。像这样

[self.presentingViewController dismissViewControllerAnimated:YES completion:nil];

    ////////////////////////////////////
    //Some Stuff Other Calculations//
    ////////////////////////////////////
    //Then

    if([SLComposeViewController isAvailableForServiceType: SLServiceTypeFacebook])
    {
        // Facebook Service Type is Available

        SLComposeViewController *slVC   =   [SLComposeViewController composeViewControllerForServiceType: SLServiceTypeFacebook];
        SLComposeViewControllerCompletionHandler handler    =   ^(SLComposeViewControllerResult result)
        {
            if (result == SLComposeViewControllerResultCancelled)
            {
                NSLog(@"Cancelled");

            }
            else
            {
                NSLog(@"Done");
            }

            [slVC dismissViewControllerAnimated:NO completion:Nil];
        };
        slVC.completionHandler = handler;
        [slVC setInitialText:post[@"user_fullname"]];
        [slVC addURL:[NSURL URLWithString:post[@"url"]]];

        [self presentViewController:slVC animated:NO completion:Nil];
    }

但这似乎不起作用。 Facebook 模态会自动取消。

我在概念上做错了吗？

Answer 1

像这样使用完成 block :

[self dismissViewControllerAnimated:NO completion:^{

   //SHOW YOUR NEW VIEW CONTROLLER HERE!
}];

您缺少上面的完成处理程序。