How can I make a simple gamecenter achievement?

Unity Engine
1

so how would I go about doing this:

if (time.timesincelevelload == 300) {
gamcenterachievement = "you have been playing this game too much..."
}

just how would I make a simple banner pop up? I’ve added support in itunes connect already.

2
3

thats great, thanks. But it doesn’t actually say how to create one. Just to load them.

Would this work?

IAchievement achievement = Social.CreateAchievement();
achievement.id = "Started Playing";
if (time.timesincelevelload == .1) {
achievement.progressCompleted = 100.0;
}
achievement.ReportProgress( result => {
    if (result)
        Debug.Log ("Successfully reported progress");
    else
        Debug.Log ("Failed to report progress");
});