ios - MFMailComposeViewController 不关闭

Question

我有一个应用程序，我在其中使用电子邮件给开发人员按钮。当我按下按钮时，VEMailView-controller 打开。这只是 MFMailComposeViewController 的包装器。

当我按下“发送”按钮时， Controller 必须关闭，但我只看到白色窗口。不再。它必须对主 ViewController 关闭。怎么修？

这是我的代码:

    #import <MessageUI/MessageUI.h>

#import "VEMailView.h"

@interface VEMailView () <
    MFMailComposeViewControllerDelegate,
    UINavigationControllerDelegate
>
// UILabel for displaying the result of the sending the message.

@end


@implementation VEMailView{
    BOOL alreadyOpened;
}



- (void)viewDidLoad
{
    [super viewDidLoad];
    alreadyOpened = NO;

}
- (void) viewDidAppear:(BOOL)animated {
[self showMailPicker];

}

- (void)showMailPicker
{

    if ([MFMailComposeViewController canSendMail])

    {
        [self displayMailComposerSheet];
    }

}

- (void)displayMailComposerSheet 
{
    MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate = self;

    [picker setSubject:@"iOS"];

    NSArray *toRecipients = [NSArray arrayWithObject:@"first@example.com"];

    [picker setToRecipients:toRecipients];

    NSString *emailBody = @" ";
    [picker setMessageBody:emailBody isHTML:NO];

    [self presentViewController:picker animated:YES completion:NULL];
}

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

    switch (result)
    {
        case MFMailComposeResultCancelled:
            NSLog(@"Result: Mail sending canceled");
            break;
        case MFMailComposeResultSaved:
            NSLog(@"Result: Mail saved");
            break;
        case MFMailComposeResultSent:
            NSLog(@"Result: Mail sent");
            break;
        case MFMailComposeResultFailed:
            NSLog(@"Result: Mail sending failed");
            break;
        default:
            NSLog(@"Result: Mail not sent");
            break;
    }
[self dismissViewControllerAnimated:YES completion:nil];
}



@end

Answer 1

那是因为你正在制作一个额外的 View Controller 。在按钮所在的 View Controller 中创建 MFMailComposeViewController。邮件撰写 Controller 本身就是一个 Controller 。出现白屏是因为这是您的 VEMailView 的默认 View 。摆脱它并使用这些方法:

- (void)showMailPicker;
- (void)displayMailComposerSheet;

在带有按钮的 View Controller 中。也让它成为代表。