#import 
#import 

@interface ViewController : UIViewController


-(IBAction)updateScore:(id)sender;
-(IBAction)showLeaderBoard:(id)sender;

@end

#import "ViewController.h"

@interface ViewController ()
@end

@implementation ViewController

- (void)viewDidLoad {
   [super viewDidLoad];
   if([GKLocalPlayer localPlayer].authenticated == NO) {
      [[GKLocalPlayer localPlayer] 
      authenticateWithCompletionHandler:^(NSError *error) {
         NSLog(@"Error%@",error);
      }];
   }    
}

- (void)didReceiveMemoryWarning {
   [super didReceiveMemoryWarning];
   // Dispose of any resources that can be recreated.
}

- (void) updateScore: (int64_t) score 
   forLeaderboardID: (NSString*) category {
   GKScore *scoreObj = [[GKScore alloc]
   initWithCategory:category];
   scoreObj.value = score;
   scoreObj.context = 0;
   
   [scoreObj reportScoreWithCompletionHandler:^(NSError *error) {
      // Completion code can be added here
      UIAlertView *alert = [[UIAlertView alloc]
      initWithTitle:nil message:@"Score Updated Succesfully" 
      delegate:self cancelButtonTitle:@"Ok" otherButtonTitles: nil];
      [alert show];
   }];
}

-(IBAction)updateScore:(id)sender {
   [self updateScore:200 forLeaderboardID:@"tutorialsPoint"];
}

-(IBAction)showLeaderBoard:(id)sender {
   GKLeaderboardViewController *leaderboardViewController =
   [[GKLeaderboardViewController alloc] init];
   leaderboardViewController.leaderboardDelegate = self;
   [self presentModalViewController:
   leaderboardViewController animated:YES];
}

#pragma mark - Gamekit delegates
- (void)leaderboardViewControllerDidFinish:
(GKLeaderboardViewController *)viewController {
   [self dismissModalViewControllerAnimated:YES];
}
@end