通知用户分数已提交给Game Center

Question

Is there any method to tell the user that his score submitted successfully or just use an alert view.

I mean something like the Game Center welcome message: "Welcome Back, user"

Answer 1

Game Center score submission implements a block callback which you can use to handle errors or successful submission. This is a function copied directly from the developer documentation:

- (void) reportScore: (int64_t) score forCategory: (NSString*) category{
  GKScore *scoreReporter = [[[GKScore alloc] initWithCategory:category] autorelease];
  scoreReporter.value = score;

  [scoreReporter reportScoreWithCompletionHandler:^(NSError *error) {
    if (error != nil){
      //There was an error submitting the score.
    }else {
      //The score was successfully submitted.
    }
  }];
}

In terms of the user interface, like the sliding "welcome back" view, you'll have to make your own user interface for that. (I just use UIAlertview , but that's totally up to you.)

Answer 2

I mean something like the Game Center welcome message: "Welcome Back, user"

You can use GKNotificationBanner on iOS 5.

Have a look at the reference