【iOS开发必备指南合集】申请企业级IDP、真机调试、游戏接入Game(2)

4.2用户登录

- (void) authenticateLocalPlayer { [[GKLocalPlayer localPlayer] authenticateWithCompletionHandler:^(NSError *error){ if (error == nil) { //成功处理 NSLog(@"成功"); NSLog(@"1--alias--.%@",[GKLocalPlayer localPlayer].alias); NSLog(@"2--authenticated--.%d",[GKLocalPlayer localPlayer].authenticated); NSLog(@"3--isFriend--.%d",[GKLocalPlayer localPlayer].isFriend); NSLog(@"4--playerID--.%@",[GKLocalPlayer localPlayer].playerID); NSLog(@"5--underage--.%d",[GKLocalPlayer localPlayer].underage); }else { //错误处理 NSLog(@"失败 %@",error); } }]; }

对于开发者来说,Game Center必须经过测试才能上线,没有上线的程序在测试环境中登录时会出现sandbox提示.如图.

4.3用户变更检测
由于4.0以后系统支持多任务,玩家的机器有可能被不同的玩家接触,导致Game Center上的用户发生变化,当发生变化的时候,程序必须在游戏中通知玩家.

- (void) registerForAuthenticationNotification { NSNotificationCenter *nc = [NSNotificationCenter defaultCenter]; [nc addObserver:self selector:@selector(authenticationChanged) name:GKPlayerAuthenticationDidChangeNotificationName object:nil]; } - (void) authenticationChanged { if ([GKLocalPlayer localPlayer].isAuthenticated) { ;// Insert code here to handle a successful authentication. } else { ;// Insert code here to clean up any outstanding Game Center-related classes. } }

5.对Leaderboard进行操作
5.1上传一个分数

- (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) { // handle the reporting error NSLog(@"上传分数出错."); //If your application receives a network error, you should not discard the score. //Instead, store the score object and attempt to report the player’s process at //a later time. }else { NSLog(@"上传分数成功"); } }]; }

当上传分数出错的时候,要将上传的分数存储起来,比如将SKScore存入一个NSArray中.等可以上传的时候再次尝试.

5.2下载一个分数

//GKScore objects provide the data your application needs to create a custom view. //Your application can use the score object’s playerID to load the player’s alias. //The value property holds the actual value you reported to Game Center. the formattedValue //property provides a string with the score value formatted according to the parameters //you provided in iTunes Connect. - (void) retrieveTopTenScores { GKLeaderboard *leaderboardRequest = [[GKLeaderboard alloc] init]; if (leaderboardRequest != nil) { leaderboardRequest.playerScope = GKLeaderboardPlayerScopeGlobal; leaderboardRequest.timeScope = GKLeaderboardTimeScopeAllTime; leaderboardRequest.range = NSMakeRange(1,10); leaderboardRequest.category = @"TS_LB"; [leaderboardRequest loadScoresWithCompletionHandler: ^(NSArray *scores, NSError *error) { if (error != nil){ // handle the error. NSLog(@"下载失败"); } if (scores != nil){ // process the score information. NSLog(@"下载成功...."); NSArray *tempScore = [NSArray arrayWithArray:leaderboardRequest.scores]; for (GKScore *obj in tempScore) { NSLog(@" playerID : %@",obj.playerID); NSLog(@" category : %@",obj.category); NSLog(@" date : %@",obj.date); NSLog(@" formattedValue : %@",obj.formattedValue); NSLog(@" value : %d",obj.value); NSLog(@" rank : %d",obj.rank); NSLog(@"**************************************"); } } }]; } }

说明:
1) playerScope:表示检索玩家分数范围.
2) timeScope:表示某一段时间内的分数
3) range:表示分数排名的范围
4) category:表示你的Leaderboard的ID.

5.3玩家信息交互
Game Center最重要的一个功能就是玩家交互.所以,必须检索已经登录玩家的好友信息.根据自己的需要做出设置,比如,可以与好友比较分数,或者好友排行榜等.
//检索已登录用户好友列表

- (void) retrieveFriends { GKLocalPlayer *lp = [GKLocalPlayer localPlayer]; if (lp.authenticated) { [lp loadFriendsWithCompletionHandler:^(NSArray *friends, NSError *error) { if (error == nil) { [self loadPlayerData:friends]; } else { ;// report an error to the user. } }]; } }

上面的friends得到的只是一个身份列表,里面存储的是NSString,想要转换成好友ID,必须调用- (void) loadPlayerData: (NSArray *) identifiers方法,该方法得到的array里面存储的才是GKPlayer对象.如下

/* Whether you received player identifiers by loading the identifiers for the local player’s friends, or from another Game Center class, you must retrieve the details about that player from Game Center. */ - (void) loadPlayerData: (NSArray *) identifiers { [GKPlayer loadPlayersForIdentifiers:identifiers withCompletionHandler:^(NSArray *players, NSError *error) { if (error != nil) { // Handle the error. } if (players != nil) { NSLog(@"得到好友的alias成功"); GKPlayer *friend1 = [players objectAtIndex:0]; NSLog(@"friedns---alias---%@",friend1.alias); NSLog(@"friedns---isFriend---%d",friend1.isFriend); NSLog(@"friedns---playerID---%@",friend1.playerID); } }]; }

至此,leaderboard功能介绍完毕

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