SLComposeViewController中的setInitialText方法iOS 8.3不会在Facebook工作表中显示文本

Question

The code snippet below is the callback for an on screen button. The Facebook sheet appears but contains no text. However, if you replace SLServiceTypeFacebook with SLServiceTypeTwitter it does show the initial text. I am using XCode 6.3.1 and iOS 8.3 on an iPhone 6. Thank you in advance.

-(IBAction)facebookButton:(id)sender
{
    if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook])
    {
        NSString* facebookText = @"Awesome App";
        SLComposeViewController *fbPostSheet = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
        [fbPostSheet setInitialText:facebookText];
        [self presentViewController:fbPostSheet animated:YES completion:nil];
    }
    else{
         UIAlertView *alertView = [[UIAlertView alloc]
                              initWithTitle:@"Unable to Connect to Facebook"
                              message:@"Make sure your device has an internet connection and you have your Facebook account setup in the Settings App"
                              delegate:self
                              cancelButtonTitle:@"OK"
                              otherButtonTitles:nil];
        [alertView show];
    }
}        

Answer 1

如果您删除设备上的Facebook应用程序，将显示初始文本。

Answer 2

It actually works if you set the text inside the completion handler:

NSString* facebookText = @"Awesome App";
SLComposeViewController *fbPostSheet = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
//[fbPostSheet setInitialText:facebookText];
[self presentViewController:fbPostSheet animated:YES completion:^
{
    [fbPostSheet setInitialText:facebookText];
}];