两个ModalViewController [英] Two ModalViewController

问题描述

我有一个navigationController从我启动ModalViewController的地方。
在这个ModalViewController中，我将显示另一个ModalViewController的MailComposer。

现在如果用户点击发送按钮，MailComposerView应该被解除，另外ModalViewController 。为此，我在mailComposerController中调用了一个委托方法。

现在只有MailComposerView将被关闭，但没有其他的ModalViewController和我收到以下错误消息

 尝试关闭视图当前未显示的模态视图控制器。 self =< UINavigationController：0x724d500> modalViewController =< UINavigationController：0x72701f0> 
  

你有什么想法我会做错吗？

第一个ModalView

   - （void）addList {
 NSLog（@addList）; 
 
 // AddListViewController * addListViewController = [[AddListViewController alloc] init]; 
 AddListViewController * addListViewController = [[AddListViewController alloc] initWithStyle：UITableViewStyleGrouped]; 
 addListViewController.delegate = self; 
 
 UINavigationController * navigationController = [[UINavigationController alloc] initWithRootViewController：addListViewController]; 
 navigationController.navigationBar.barStyle = UIBarStyleBlack; 
 navigationController.navigationBar.translucent = YES; 
 [self presentModalViewController：navigationController animated：YES]; 
 
 [navigationController release]; 
 [addListViewController release]; 
  

在AddListViewController中调用MailView

  MFMailComposeViewController * mailComposer = [[MFMailComposeViewController alloc] init]; 
 mailComposer.mailComposeDelegate = self; 
 
 NSString * subject = [NSString stringWithFormat：@groupname for groupname：％@，@mhm]; 
 [mailComposer setSubject：subject]; 
 
 //填写电子邮件正文文本
 NSString * emailBody = @这是一个组邀请bla bla; 
 [mailComposer setMessageBody：emailBody isHTML：NO]; 
 
 [self presentModalViewController：mailComposer animated：YES]; 
 [mailComposer release]; 
  

在mailComposerController方法中

  [self.navigationController dismissModalViewControllerAnimated：YES]; 
 [self.delegate finishAddList：checkmark andListName：listName.text]; 
  

在finihAddList委托中

  [self dismissModalViewControllerAnimated：YES]; 
  

解决方案

您必须稍后再次打电话，因为调用时，第一个关闭还没有完成。

  [self performSelector：@selector（finish :) withObject：obj afterDelay ：0.0f]; 
  

0.0f的延迟是有意的，这意味着它将在下一个事件循环中完成。 / p>

I have a navigationController from where I launch a ModalViewController. In this ModalViewController I will display the MailComposer which itself another ModalViewController.

Now if the user hits the send button the MailComposerView should be dismissed as well the other ModalViewController. For that I call a delegate method in the mailComposerController.

Now only the MailComposerView will be dismissed but no the the other ModalViewController and I get following error message

attempt to dismiss modal view controller whose view does not currently appear. self = <UINavigationController: 0x724d500> modalViewController = <UINavigationController: 0x72701f0>

Do you have any Idea would I'm doing wrong?

First ModalView

- (void)addList {
NSLog(@"addList");

//AddListViewController *addListViewController = [[AddListViewController alloc] init];
AddListViewController *addListViewController = [[AddListViewController alloc] initWithStyle:UITableViewStyleGrouped];
addListViewController.delegate = self;

UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:addListViewController];
navigationController.navigationBar.barStyle = UIBarStyleBlack;
navigationController.navigationBar.translucent = YES;
[self presentModalViewController:navigationController animated:YES];

[navigationController release];
[addListViewController release];    }

In the AddListViewController calling the MailView

MFMailComposeViewController *mailComposer = [[MFMailComposeViewController alloc] init];
    mailComposer.mailComposeDelegate = self;

    NSString *subject = [NSString stringWithFormat:@"Group invite for groupname: %@", @"mhm"];
    [mailComposer setSubject:subject];

    // Fill out the email body text
    NSString *emailBody = @"This is an group invite bla bla";
    [mailComposer setMessageBody:emailBody isHTML:NO];

    [self presentModalViewController:mailComposer animated:YES];
    [mailComposer release]; 

In the mailComposerController method

[self.navigationController dismissModalViewControllerAnimated:YES];
[self.delegate finishAddList:checkmark andListName:listName.text];

In the finsihAddList delegate

[self dismissModalViewControllerAnimated:YES];

解决方案

You must call the second dismiss with a delay, because the first dismiss hasn't been done yet when called.

[self performSelector: @selector(finish:) withObject: obj afterDelay: 0.0f];

A delay of 0.0f is intentional, it means it will be done in the next event loop.

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