问题
In my app I'm using the following code that allows to share an image with a text:
- (IBAction)sharePressed:(id)sender {
UIImage *postingImage = [UIImage imageWithContentsOfFile:self.filepath];
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[@"Lorem ipsum", postingImage] applicationActivities:nil;
[self presentViewController:activityViewController animated:YES completion:nil];
}
And when posting I can see image, but can't see text. Also text doesn't appear in FB.
回答1:
I'm afraid to tell you, you cannot post text to Facebook programatically. It's a new Facebook prohibition that forbids "pre-filled" Facebook sharing. That is why newer versions of iOS do not show your text, even tough it's correctly provided (and works on Twitter and in other sharing options).
For more info please refer to https://developers.facebook.com/docs/apps/review/prefill)
回答2:
I first saw this when Facebook updated their app on April 24th. Plain text sharing to Facebook isn't working as long as the Facebook app is installed. After you delete it, it's available again.
If you try to share a URL or an image together with the plain text, you will see Facebook as an option but the text field will be blank. The image or URL will attach without a problem.
I posted a sample project that reproduces this problem on github:
https://github.com/djr/UIActivityViewController-Facebook
This is not an answer, but it's pretty clear that the problem is caused by the Facebook app.
来源：https://stackoverflow.com/questions/29875123/ios-plugin-com-apple-share-facebook-post-do-not-show-provided-text