Native iOS Twitter post from Unity - ios

Question

I'm trying to implement the native iOS twitter account to unity. I found a code which uses the native social accounts via Xcode, and so I'm trying to make it communicate to unity but I get this error: "Use of undeclared identifier 'self'"
Here's my code:
extern "C"
{
void _PushTwitter(const char * messageTweet)
{
//Check Twitter accessibility and at least one account is setup.
if([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter]) {
SLComposeViewController *tweetSheet =[SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];
//This is setting the initial text for our share card.
[tweetSheet setInitialText:[NSString stringWithUTF8String:messageTweet]];
//Brings up the little share card with the test we have pre defind.
[self presentViewController:tweetSheet animated:YES completion:nil];
} else {
//This alreat tells the user that they can't use built in socal interegration and why they can't.
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"Sorry" message:#"You can't send a tweet right now, make sure you have at least one Twitter account setup and your device is running the latest iOS version" delegate:nil cancelButtonTitle:#"Okay" otherButtonTitles:nil];
[alertView show];
}
}
}
I get the error on the [self presentViewController...] part.
This was the original code:
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
//Each button title we gave to our action sheet is given a tag starting with 0.
if (buttonIndex == 0) {
//Check Twitter accessibility and at least one account is setup.
if([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter]) {
SLComposeViewController *tweetSheet =[SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];
//This is setting the initial text for our share card.
[tweetSheet setInitialText:#"veasoftware.com made it easy to intergate Twitter with iOS 6! :D "];
//Brings up the little share card with the test we have pre defind.
[self presentViewController:tweetSheet animated:YES completion:nil];
} else {
//This alreat tells the user that they can't use built in socal interegration and why they can't.
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"Sorry" message:#"You can't send a tweet right now, make sure you have at least one Twitter account setup and your device is using iOS6." delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alertView show];
}
}
}
Any help will be greatly appreciated.
EDIT/SOLUTION: For anybody interested, I've found a much easier integration on this article (probably the only one out there): http://www.theappguruz.com/unity/share-image-and-text-on-twitter-in-ios-using-native-code/ Works like a charm. I'm running iOS 8, Unity 5, and the latest version of Xcode.

Answer 1

The code that you found is probably part of an objective-c class, where self is defined and it points to the current object.
The code that you wrote doesn't seem to be a method of a class, but a global function, which means it doesn't have an object attached.
You should add the code you found to one of the classes Unity defines for you, maybe inside UnityAppController.mm