IOS GameKit

簡介

GameKit是iOS SDK中一個常用的框架。其核心功能有3個：

  • 交互遊戲平臺Game Center，
  • P2P設備通訊功能
  • In-Game Voice。

實例步驟

1.在鏈接 iTunes 時請確保擁有一個唯一的 App ID（ unique App ID），App ID在我們應用程式更新 bundle ID時及在Xcode代碼簽名與相應的配置檔需要使用到。

2.創建新的應用程式和更新應用程式資訊。在添加新的應用程式文檔可以瞭解更多有關資訊。

3.打開你申請的application,點擊Manage Game Center選項。進入後點擊Enable Game Center使你的Game Center生效。接下來設置自己的Leaderboard和Achievements。

4.下一步涉及處理代碼，並為我們的應用程式創建用戶介面。

5.創建一個single view application，並輸入 bundle identifier 。

6.更新 ViewController.xib，如下所示

gamekitInterface

7.選擇專案檔，然後選擇目標，然後添加GameKit.framework

8.為已添加的按鈕創建IBActions

9.更新ViewController.h檔，如下所示

#import <UIKit/UIKit.h>
#import <GameKit/GameKit.h>

@interface ViewController : UIViewController
<GKLeaderboardViewControllerDelegate>

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

@end

10.更新ViewController.m ，如下所示

#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:@"zaixian"];
}
-(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

輸出

運行該應用程式，輸出結果如下

gamekit_Output1

當我們單擊顯示排行榜時，螢幕顯示如下:

gamekit_Output2

當我們點擊更新分數，比分將被更新到我們排行榜上，我們會得到一個資訊，如下圖所示

gamekit_Output3