Iphone 应用程序在设备中的电子邮件上崩溃

我在我的iPhone应用程序中添加了一个“Email”功能，它在iPhone上崩溃了，但在模拟器上工作。请告诉我为什么它会在设备上崩溃

这是密码

-(IBAction)sendMail{
    MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init];
    controller.mailComposeDelegate = self;
    [controller setSubject:@"Contact"];

    [controller setToRecipients:[NSArray arrayWithObject:@"Contact@BettorsSidekick.com"]];
    [controller setMessageBody:@"" isHTML:NO];
    [self presentModalViewController:controller animated:YES];
    [controller release];
}

- (void)mailComposeController:(MFMailComposeViewController*)controller  
          didFinishWithResult:(MFMailComposeResult)result 
                        error:(NSError*)error;
{
    if (result == MFMailComposeResultSent) {
        NSLog(@"It's away!");
    }
    [self dismissModalViewControllerAnimated:YES];
}

试试这个

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


    if(controller && [MFMailComposeViewController canSendMail]){

        controller.mailComposeDelegate = self;
        [controller setSubject:@"Contact"];

        [controller setToRecipients:[NSArray arrayWithObject:@"Contact@BettorsSidekick.com"]];
        [controller setMessageBody:@"" isHTML:NO];
        [self presentModalViewController:controller animated:YES];


    }

if (controller) {

    [controller release];        

}

试试这个

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


    if(controller && [MFMailComposeViewController canSendMail]){

        controller.mailComposeDelegate = self;
        [controller setSubject:@"Contact"];

        [controller setToRecipients:[NSArray arrayWithObject:@"Contact@BettorsSidekick.com"]];
        [controller setMessageBody:@"" isHTML:NO];
        [self presentModalViewController:controller animated:YES];


    }

if (controller) {

    [controller release];        

}

---

使用此代码可以很好地工作

-(IBAction)Btn_EmailPressed:(id)sender{
    if (![MFMailComposeViewController canSendMail]) {
        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Alert" message:@"Email cannot be configure." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        [alert release];
        return;
    }else {
        picker = [[MFMailComposeViewController alloc] init];
        picker.mailComposeDelegate=self;
        [picker setToRecipients:nil];
        [picker setSubject:@"Email"];
        [picker setMessageBody:nil isHTML:NO];
        NSArray *toRecipients = [[NSArray alloc] initWithObjects:lblSite.text,nil];
        [picker setToRecipients:toRecipients];
        [self presentModalViewController:picker animated:YES];
    }
}


- (void)mailComposeController:(MFMailComposeViewController*)mailController didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error {
    NSString *msg1;
    switch (result)
    {
        case MFMailComposeResultCancelled:
            msg1 =@"Sending Mail is cancelled";
            break;
        case MFMailComposeResultSaved:
            msg1=@"Sending Mail is Saved";
            break;
        case MFMailComposeResultSent:
            msg1 =@"Your Mail has been sent successfully";
            break;
        case MFMailComposeResultFailed:
            msg1 =@"Message sending failed";
            break;
        default:
            msg1 =@"Your Mail is not Sent";
            break;
    }
    UIAlertView *mailResuletAlert = [[UIAlertView alloc]initWithFrame:CGRectMake(10, 170, 300, 120)];
    mailResuletAlert.message=msg1;
    mailResuletAlert.title=@"Message";
    [mailResuletAlert addButtonWithTitle:@"OK"];
    [mailResuletAlert show];
    [mailResuletAlert release];
    [self dismissModalViewControllerAnimated:YES];  
}

---

使用此代码可以很好地工作

-(IBAction)Btn_EmailPressed:(id)sender{
    if (![MFMailComposeViewController canSendMail]) {
        UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Alert" message:@"Email cannot be configure." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        [alert release];
        return;
    }else {
        picker = [[MFMailComposeViewController alloc] init];
        picker.mailComposeDelegate=self;
        [picker setToRecipients:nil];
        [picker setSubject:@"Email"];
        [picker setMessageBody:nil isHTML:NO];
        NSArray *toRecipients = [[NSArray alloc] initWithObjects:lblSite.text,nil];
        [picker setToRecipients:toRecipients];
        [self presentModalViewController:picker animated:YES];
    }
}


- (void)mailComposeController:(MFMailComposeViewController*)mailController didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error {
    NSString *msg1;
    switch (result)
    {
        case MFMailComposeResultCancelled:
            msg1 =@"Sending Mail is cancelled";
            break;
        case MFMailComposeResultSaved:
            msg1=@"Sending Mail is Saved";
            break;
        case MFMailComposeResultSent:
            msg1 =@"Your Mail has been sent successfully";
            break;
        case MFMailComposeResultFailed:
            msg1 =@"Message sending failed";
            break;
        default:
            msg1 =@"Your Mail is not Sent";
            break;
    }
    UIAlertView *mailResuletAlert = [[UIAlertView alloc]initWithFrame:CGRectMake(10, 170, 300, 120)];
    mailResuletAlert.message=msg1;
    mailResuletAlert.title=@"Message";
    [mailResuletAlert addButtonWithTitle:@"OK"];
    [mailResuletAlert show];
    [mailResuletAlert release];
    [self dismissModalViewControllerAnimated:YES];  
}

---

如果您没有在iphone设备中配置任何电子邮件帐户，这可能是崩溃的原因，因为当您调用mfmailcomposer时，它将在模拟器上工作，但在设备上会失败，结果将是崩溃，因此请配置设备上的邮件，然后尝试上面的代码。

如果您没有在iphone中配置任何电子邮件帐户设备可能已损坏，这可能是崩溃的原因，因为当您调用mfmailcomposer时，它将在模拟器上工作，但在设备上会失败，结果将是崩溃，因此请配置设备上的邮件，然后尝试上面的代码。

是否有任何崩溃消息可以帮助我们？是否要发布错误消息？请在解除之前尝试清除mailComposeDelegateMailControlleran任何可以帮助我们的崩溃消息？是否要发布错误消息？请在解除MailController之前尝试清除mailComposeDelegate