无法关闭 iPhone 中的电子邮件编辑器视图？

Question

我是 iPhone 开发新手。我创建了一个基于选项卡栏的应用程序。首先，我希望显示电子邮件编辑器。我可以显示它，但取消和发送按钮不起作用，我不知道哪里出了问题。请帮助我。这是我的代码。

- (void)viewDidLoad 
{
    [super viewDidLoad];
    [self displayComposerSheet];    
}

-(void)displayComposerSheet 
{
    picker = [[MFMailComposeViewController alloc] init];

   [[picker navigationBar] setTintColor:[UIColor blackColor]];

   picker.mailComposeDelegate = self;

   if ([MFMailComposeViewController canSendMail]) 
   {

            [picker setToRecipients:[NSArray arrayWithObjects:@"[email protected]",nil]];

            [picker setSubject:@"Sample"];

   }
   [self.view addSubview:picker.view];
   [self presentModalViewController:picker animated:YES];

}

 - (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error 
{

    [self dismissModalViewControllerAnimated:YES];

 }

Answer 1

您正在向邮件编辑器展示两次。

删除行：

[self.view addSubview:picker.view];

并将下一行替换为：

[self.navigationController presentModalViewController:picker animated:YES];

Answer 2

如果您仅添加 mailcomposser 的子视图，则必须将其从 self.view 中删除，
在您的代码中，您要添加子视图并也显示，

如果您仅使用 [self.view addSubview:picker.view]; 则
尝试将其删除。

 - (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error 
{
    [controller.view removeFromSuperview];

 }

我仍然建议对

Present MFMailComposeViewController 使用 [self.navigationControllerpresentModalViewController:pickeranimated:YES]; ，

并使用 [selfdismissModalViewControllerAnimated:YES]; 关闭它。

Answer 3

使用此代码：

MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init];
controller.mailComposeDelegate = self;
NSArray *toRecipients = [NSArray arrayWithObjects:@"[email protected]", @"[email protected]", nil]; 
[controller setToRecipients:toRecipients];
[controller setTitle:@"Contact Us"];
controller.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentModalViewController:controller animated:YES];


- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error 
{
     [self becomeFirstResponder];
     NSString *strMailResult;
     switch (result)
     {
        case MFMailComposeResultCancelled:
        strMailResult = NSLocalizedString(@"E-Mail Cancelled",@"");
        break;
        case MFMailComposeResultSaved:
        strMailResult = NSLocalizedString(@"E-Mail Saved",@"");
        break;
        case MFMailComposeResultSent:
        strMailResult = NSLocalizedString(@"E-Mail Sent",@"");
        break;
        case MFMailComposeResultFailed:
        strMailResult = NSLocalizedString(@"E-Mail Failed",@"");
        break;
        default:
        strMailResult = NSLocalizedString(@"E-Mail Not Sent",@"");
        break;
     }

     UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"ISO Audit",@"") message:strMailResult delegate:self  cancelButtonTitle:NSLocalizedString(@"OK",@"") otherButtonTitles:nil];
     [alertView show];
    [self dismissModalViewControllerAnimated:YES];
}

Answer 4

设置 MFMailComposeViewController 的委托

MFMailComposeViewController *mailcomposer = [[MFMailComposeViewController alloc]init];

mailcomposer.mailComposeDelegate = self; 

并使用此委托方法

-(void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
}