IOS GameKit

簡(jiǎn)介

GameKit是iOS SDK中一個(gè)常用的框架。其核心功能有3個(gè)：

• 交互游戲平臺(tái)Game Center，
• P2P設(shè)備通訊功能
• In-Game Voice。

實(shí)例步驟

1.在鏈接 iTunes 時(shí)請(qǐng)確保擁有一個(gè)唯一的 App ID（ unique App ID），App ID在我們應(yīng)用程序更新 bundle ID時(shí)及在Xcode代碼簽名與相應(yīng)的配置文件需要使用到。

2.創(chuàng)建新的應(yīng)用程序和更新應(yīng)用程序信息。在添加新的應(yīng)用程序文檔可以了解更多有關(guān)信息。

3.打開你申請(qǐng)的application,點(diǎn)擊Manage Game Center選項(xiàng)。進(jìn)入后點(diǎn)擊Enable Game Center使你的Game Center生效。接下來設(shè)置自己的Leaderboard和Achievements。

4.下一步涉及處理代碼，并為我們的應(yīng)用程序創(chuàng)建用戶界面。

5.創(chuàng)建一個(gè)single view application，并輸入 bundle identifier 。

6.更新 ViewController.xib，如下所示

7.選擇項(xiàng)目文件，然后選擇目標(biāo)，然后添加GameKit.framework

8.為已添加的按鈕創(chuàng)建IBActions

9.更新ViewController.h文件，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:@"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

輸出

運(yùn)行該應(yīng)用程序，輸出結(jié)果如下

當(dāng)我們單擊顯示排行榜時(shí)，屏幕顯示如下:

當(dāng)我們點(diǎn)擊更新分?jǐn)?shù)，比分將被更新到我們排行榜上，我們會(huì)得到一個(gè)信息，如下圖所示