在 MFMessageComposeViewController 中点击取消后，没有任何反应

Question

虽然在使用MFMailComposeViewController 之后，转移到MFMessageComposeViewController 是直截了当的，但是有一个问题。

假设这段代码：

MFMessageComposeViewController* mySMS = [[MFMessageComposeViewController alloc] init];
[mySMS setDelegate:self];
[self presentModalViewController:mySMS animated:YES];

邮件的工作方式是这样，但在短信中，你应该将委托设置为不同的内部结构，如下所示：

[SMS setMessageComposeDelegate:self];

希望你不要像我今天早些时候那样陷入困境。

Answer 1

你需要实现委托方法-(void)mailComposeController(MFMailComposeViewController*)controller didFinishWithResult (MFMailComposeResult)result error:(NSError*)error:

在里面你应该自己解散它：

-(void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error 
{
    [self dismissModalViewControllerAnimated:YES]; 
}

Answer 2

您可以在 Apple 文档中查看 MFMailComposeResult

  enum MFMailComposeResult {
    MFMailComposeResultCancelled,
    MFMailComposeResultSaved,
    MFMailComposeResultSent,
    MFMailComposeResultFailed
 };
 typedef enum MFMailComposeResult MFMailComposeResult; 

而且你必须在委托方法中自己解除控制器

 - (void) mailComposeController:(MFMailComposeViewController *)controller          didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
 {
  switch (result){
    case MFMailComposeResultCancelled:
        NSLog(@"Mail cancelled");
        break;
    case MFMailComposeResultSaved:
        NSLog(@"Mail saved");
        break;
    case MFMailComposeResultSent:
        NSLog(@"Mail sent");
        break;
    case MFMailComposeResultFailed:
        NSLog(@"Mail sent failure: %@", [error localizedDescription]);
        break;
    default:
        break;
   }
// Close the Mail Interface
   [self dismissViewControllerAnimated:YES completion:NULL];
}