MFMailComposeViewController點擊後很慢就解散發送按鈕

Question

我有點奇怪的問題。我正在嘗試發送應用內電子郵件。所以，我使用了MFMailComposeViewController。並且我已經實現了MFMailComposeViewControllerDelegate。 當我點擊發送按鈕，它應該馬上被解僱。在調試模式下，它運行良好，但是，在發佈模式下，它是非常緩慢，使用戶可以點擊發送按鈕不止一次，郵件將被髮送更多比一次。 我一直困惑了五天。 任何人都可以幫助我？ 我的代碼：

-(void)sendEMail 
{ 
    Class mailClass = (NSClassFromString(@"MFMailComposeViewController")); 

    if (mailClass != nil) 
    { 
     if ([mailClass canSendMail]) 
     { 
      [self displayComposerSheet]; 
      //[self launchMailAppOnDevice]; 
     } else{ 
      [self launchMailAppOnDevice]; 
     } 
    } else { 
     [self launchMailAppOnDevice]; 
    } 
} 
//可以發送郵件的話 
-(void)displayComposerSheet 
{ 
    //mailPicker = [[MFMailComposeViewController alloc] init]; 

    mailPicker.mailComposeDelegate = self; 

    //設置主題 
    [mailPicker setSubject: kEmailSubject]; 

    // 添加發送者 
    NSArray *toRecipients = [NSArray arrayWithObject: kToRecipient]; 
    //NSArray *ccRecipients = [NSArray arrayWithObjects:@"second@example.com", @"third@example.com", nil]; 
    //NSArray *bccRecipients = [NSArray arrayWithObject:@"fourth@example.com", nil]; 
    [mailPicker setToRecipients: toRecipients]; 
    //[picker setCcRecipients:ccRecipients]; 
    //[picker setBccRecipients:bccRecipients]; 

    // 添加圖片 
    // UIImage *addPic = [UIImage imageNamed: @"123.jpg"]; 
    // NSData *imageData = UIImagePNGRepresentation(addPic);   // png 
    // NSData *imageData = UIImageJPEGRepresentation(addPic, 1); // jpeg 
    // [mailPicker addAttachmentData: imageData mimeType: @"" fileName: @"123.jpg"]; 
    NSString *emailBody = kEmailBody; 
    [mailPicker setMessageBody:emailBody isHTML:YES]; 
    [self presentViewController:mailPicker animated:YES completion:nil]; 
} 
-(void)sendMailBtnCLicked{ 
    [mailPicker dismissViewControllerAnimated:YES completion:nil]; 
} 
-(void)launchMailAppOnDevice 
{ 
    NSString *recipients = kToRecipient; 
    NSString *subject = kEmailSubject; 
    //@"mailto:first@example.com?cc=second@example.com,third@example.com&subject=my email!"; 
    NSString *body = kEmailBody; 

    NSString *email = [NSString stringWithFormat:@"mailto:%@?subject=%@&body=%@", recipients, subject,body]; 
    email = [email stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]; 

    [[UIApplication sharedApplication] openURL: [NSURL URLWithString:email]]; 
} 
- (void)mailComposeController:(MFMailComposeViewController *)controller 
      didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error 
{ 
    if (result == MFMailComposeResultSent) { 
     [AccountManager sharedManager].isSentMail = YES; 
    } 
    [controller dismissViewControllerAnimated:YES completion:nil]; 
    //[self dismissModalViewControllerAnimated:YES]; 
} 

Answer 1

停止運行後臺的其他線程。 發送郵件後，重新啓動它們。