ios-UIActivityViewController:未显示SMS选项

我正在使用

UIActivityViewController

允许通过邮件、Facebook、Twitter和短信进行共享。我有以下代码：

-(void) aFunction
{
NSString *textToShare = appRecord.title;
UIImage *imageToShare = [UIImage imageNamed:@"test/png"];
NSURL *url = [NSURL URLWithString:@"http://www.stackoverflow.com"];
NSArray *activityItems = [[NSArray alloc]  initWithObjects:textToShare, imageToShare,url,nil];


UIActivity *activity = [[UIActivity alloc] init];

NSArray *applicationActivities = [[NSArray alloc] initWithObjects:activity, nil];
UIActivityViewController *activityVC =
[[UIActivityViewController alloc] initWithActivityItems:activityItems
                                  applicationActivities:applicationActivities];

activityVC.excludedActivityTypes = @[UIActivityTypePostToWeibo, UIActivityTypeAssignToContact, UIActivityTypePrint ,UIActivityTypeCopyToPasteboard,UIActivityTypeAssignToContact,UIActivityTypeSaveToCameraRoll,UIActivityTypeMessage ];

[self presentViewController:activityVC animated:YES completion:nil];
[activityItems release];
[activity release];
[applicationActivities release];
[activity release];
}

该代码生成以下内容：

---

缺少SMS选项。我做错了什么？

您正在排除UIActivityTypeMessage（排除udedActivityTypes）。这会隐藏消息（SMS/iMessage）选项

另一件事是，设备必须具有SMS功能才能显示该选项。谢谢@Ketan。我想知道为什么模拟器没有显示该选项，但我的QA设备却显示了。