iOS 在单一操作中触发电子邮件和短信

Question

首先感谢您对以下查询的帮助。

我正在开发一个 iPhone 应用程序，其中要求用户单击按钮，应用程序应调出带有默认测试的电子邮件面板，一旦用户决定“发送”或“取消”，应用程序应调出短信面板供用户执行操作“ “发送”或“取消”

应用程序确实会以默认文本滑入电子邮件窗口，并且一旦用户按下“发送”或“取消”程序就会返回到方法“didFinishWithResult”，但稍后不会显示 SMS 窗口。当我评论发送邮件并直接跳转到短信应用程序时，确实会显示短信窗口。

我相信这是因为当应用程序请求电子邮件时，它会启动不同的线程，然后当线程返回到 didFinishWithResult 方法时，发送短信不起作用。我不知道如何解决这个问题。

请帮助，

- (void) mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error 
{
// Notifies users about errors associated with the interface
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 showSMSPicker]; <<<<<====== call for SMS
[self dismissModalViewControllerAnimated:YES]; 

之后代码正确地流向方法 [self showSMSPicker]。在showSMSPicker方法中

-(void)showSMSPicker {
Class messageClass = (NSClassFromString(@"MFMessageComposeViewController"));

if (messageClass != nil) {          
    // Check whether the current device is configured for sending SMS messages
    if ([messageClass canSendText]) {
                 MFMessageComposeViewController *smsComposer = [[MFMessageComposeViewController alloc] init];
                 smsComposer.messageComposeDelegate = self;
                if([MFMessageComposeViewController canSendText])  {           
                   smsComposer.body = @"Sending SMS";
                   smsComposer.recipients = [NSArray arrayWithObjects:@"12345678", @"87654321", nil];
                   smsComposer.messageComposeDelegate = self;
                   [self presentModalViewController:smsComposer animated:YES];
              }
               [smsComposer release];
    }
    else {  
            NSLog( @"Device not configured to send SMS.");

    }
}
else {
    NSLog(@"Device not configured to send SMS.");
}
}

Answer 1

我认为动画导致短信模式的显示发生冲突。另外，dismissModalViewController 已被弃用，因此请使用：

[self dismissViewControllerAnimated:YES completion:^ {
        [self sendSMS];
}]; 

Answer 2

在显示 SMS 消息模式之前尝试关闭邮件模式。

- (void) mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error 
{
// Notifies users about errors associated with the interface
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 dismissModalViewControllerAnimated:YES]; 
[self showSMSPicker];

Answer 3

我使用了一种调整方法来完成此任务，创建了一个布尔值（如果设置为 true），然后在 ViewDIDAppear 方法中调用 showSMS 方法

  - (void) viewDidAppear:(BOOL)animated
{
   if (self.isSMSRequired) {
      [self showSMSPicker];
       self.isSMSRequired = FALSE;
    }
}

，并在

- (void) mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error 
 {
 // Notifies users about errors associated with the interface
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.isSMSRequired = TRUE;
[self dismissModalViewControllerAnimated:YES]; 

此工作...