UIActivityViewController Messenger在iOS模拟器上不工作

当我尝试初始化

UIActivityViewController

的

Messenger

组件时，得到以下结果：

 NSString *textToShare = @"Text that will be shared";
        NSArray *itemsToShare = [[NSArray alloc] initWithObjects:textToShare, nil];
        UIActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:itemsToShare applicationActivities:nil];
        activityVC.excludedActivityTypes = [[NSArray alloc] initWithObjects: UIActivityTypePrint, UIActivityTypeCopyToPasteboard, UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll, UIActivityTypePostToWeibo,UIActivityTypePostToFacebook,UIActivityTypePostToTwitter, nil];
        [activityVC setValue:@"My Subject Text" forKey:@"subject"];
        [self presentViewController:activityVC animated:YES completion:nil];

我正在使用此代码实例化我的

UIActivityViewController

：

 NSString *textToShare = @"Text that will be shared";
        NSArray *itemsToShare = [[NSArray alloc] initWithObjects:textToShare, nil];
        UIActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:itemsToShare applicationActivities:nil];
        activityVC.excludedActivityTypes = [[NSArray alloc] initWithObjects: UIActivityTypePrint, UIActivityTypeCopyToPasteboard, UIActivityTypeAssignToContact, UIActivityTypeSaveToCameraRoll, UIActivityTypePostToWeibo,UIActivityTypePostToFacebook,UIActivityTypePostToTwitter, nil];
        [activityVC setValue:@"My Subject Text" forKey:@"subject"];
        [self presentViewController:activityVC animated:YES completion:nil];

然后，当我尝试使用

消息发送时，我的日志中出现以下错误

Launch Services: Unable to find app identifier com.apple.MobileSMS
2013-07-31 01:27:15.180 Coolist[54111:c07] Application tried to push a nil view controller on target <MFMessageComposeViewController: 0xa38db30>.

启动服务：找不到应用标识符com.apple.MobileSMS
2013-07-31 01:27:15.180 Coolist[54111:c07]应用程序试图将无视图控制器推送到目标上。

这只是一个模拟器问题吗？
检查：-在设备中测试应用程序而不是模拟器。iMessage在模拟器上不工作。自我测试iOS模拟器没有邮件应用程序，无法模拟邮件发送（请参阅）。@如果您注意到，模拟器也没有邮件应用程序，但它可以模拟邮件创建。我觉得这很奇怪。但是，是的，谢谢你们的建议。