IOS GameKit

简介

GameKit是iOS SDK中一个常用的框架。其核心功能有3个:

  • 交互游戏平台Game Center,
  • P2P设备通讯功能
  • In-Game Voice。

实例步骤

1.在链接 iTunes 时请确保拥有一个唯一的 App ID( unique App ID),App ID在我们应用程序更新 bundle ID时及在Xcode代码签名与相应的配置文件需要使用到。

2.创建新的应用程序和更新应用程序信息。在添加新的应用程序文档可以了解更多有关信息。

3.打开你申请的application,点击Manage Game Center选项。进入后点击Enable Game Center使你的Game Center生效。接下来设置自己的Leaderboard和Achievements。

4.下一步涉及处理代码,并为我们的应用程序创建用户界面。

5.创建一个single view application,并输入 bundle identifier 。

6.更新 ViewController.xib,如下所示

gamekitInterface

7.选择项目文件,然后选择目标,然后添加GameKit.framework

8.为已添加的按钮创建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:@"icodebang"];
}
-(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

输出

运行该应用程序,输出结果如下

gamekit_Output1

当我们单击显示排行榜时,屏幕显示如下:

gamekit_Output2

当我们点击更新分数,比分将被更新到我们排行榜上,我们会得到一个信息,如下图所示

gamekit_Output3

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