GKPlayer object, 59 NSMutableArray, 60 playernameforid, 62 posting a score, 64 presentation Apple s GUI, 49 custom GUI, 53 in social app or game, 36

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1 Index A, B Achievements adding hooks GameCenterManager, 82 populateachievementcache, 82 adding hooks in UFOs achievementwithidentifieriscomplete, 84 Apple-provided interface, 85 didauthenticate, 85 finishabducting method, resetachievement method, 85 UFOGameViewController, 83 Apple s benefit custom GUI, 70 graphical user interface (GUI), 69 custom GUI achievementarray, 91 GameCenterManager, 91 NSArray object, 91 UFOAchievementViewController, 90 UFOViewController, 92 UIViewController, 90 feedback achievementcompletionlabel, 88 achievementcompletionview, 89 achievementearned method, 88 customized banner, 89 GameCenterManager, 87 GKAchievement, 87 IBOutlets, 88 percentagecomplete, 87 submitachievement, percentcomplete, 87 UIAlertView, Foursquare, Game Center, 68 GKAchievement, 86 GKAchievementDescription, 69 GKScore object, 69 object, 69 leaderboards, 67 programmatic challenges, 100 reasons for using, 68 resetting, 81 reterive data achieveddescription, 95 achievementarray, achievementwithidentifieriscomplete, 96 cellforrowatindexpath method, 95, 97 custom GUI, 97 GameCenterManager class, 93, 97, 99 Game Center server, 94 GKAchievementDescription, 96 GKAchievement object, 97 loadimagewithcompletionhandler, 96 numberofrowsinsection method, 94 percentagecomplete, 97 percentagecompleteofachievement WithIdentifier, 96 retrieveachievementmetadata method, 94 submitachievement, PercentComplete, 98 textlabel, 95 UFOAchievementViewController, 93 unachieveddescription, 95 userdefaults, 98 viewwillappear, 94 showscompletionbanner, 90 time-based hook tickthreeseconds, 86 UFOGameViewController, 86 viewdidappear, 86 viewwilldisappear,

2 278 Index Achievements (cont.) UITableViewCellSytleDefault, 96 AddMultipartData: method, 255 AirPlay built-in players AVPlayer object, 259 metadata, 260 MPMoviePlayerController class, 259 MPNowPlayingInfoCenter class, 260 remotecontrolreceivedwithevent, 261 UIWebview class, 259 mirroring, 262 MPVolumeView class, notifications, 266 second screen, 263 hidden property, 264 playbuttonpressed method, 264 tractor beam events, 264 UFOGameViewController class, widescreen, Apple TV, 265 Application Programming Interfaces (APIs), 1 Auto-matching, 114, 116 C Clan Lord game, 141 Composer account set up, 248 addurl: method, 249 completionhandler property, 249 Game Center, 248 SLRequest approach, 247 SLServiceTypeFacebook creation, 248 Custom Tweets ACAccountype, 240 account property, 242 endpoint, 241 granted variable, 241 metadata, 242 NSData, 242 postrequest method, 242 SLRequest method, using array, 241 D Delegate callback, 125 E Exchanging data determinehost method, 164 disconnections, 177 game engine for multiplayer mode matchmakerviewcontroller, 154 peeridstring and peermatch, 155 generateandsendhostnumber method, 156, 164 network abduction code abductcowfromnetworkatindex, 176 begintractorfromnetwork, 174 endtractorfromnetwork, 174 finishabductingfromnetwork, 176 hittest method modification, 175 touchedbegan and touchesend methods, 173 updatecowpaths method, 177 picking a host, 156 receiving data, 160 GameCenterManager class, 161 receiveddata protocol method, 162 sending data, 157 sendstring method, 159 sendstringtoallpeers method, 159 sharing scores, 172 single-player game, modifications, 153 spawn cow process determinehost method, 168 receiveddata method, 169 spawncow method modification, 169 syncing up the cow movements, 171 updatecowpaths method, 170 UFO drawenemyshipwithdata, 167 in viewdidload method, 165 moveplayer method, 166 updated receiveddata method, 167 using stringwithformat, 166 exitaction: method, 245 F Facebook composer account set up, 248 addurl: method, 249

3 Index 279 completionhandler property, 249 Game Center, 248 SLRequest approach, 247 SLServiceTypeFacebook creation, 248 custom posts, 254 ios, 246 JSON object, 257 new ios creation, permissions ACAccountStore, 252 property, 252 high-level permissions, 251 lower-level permissions, 251 publish-to-stream permission, UFOs request, 253 UFOs alert view delegate, 246 exitaction: method, 245 wrapper class, 257 G Game Center, 19 authentication, 21 calldelegateonmaththread method, 23 delegate property, 23 from UFOViewController, 26 GameCenterManager class, 22 ios 6, 24 prior to ios 6, 25 Friend List avatars, 32 Game Center.app, 32 GameKit.framework, 21 GKLocalPlayer object, 29 GKPlayers, 32 retrievefriendslist calldelegateonmainthread method, 30 loadfriendswithcompletionhandler method, 30 Sandbox, 28 state changes, 28 testing, 19 gcclass, 20 NSClassFromString, 20 Game Controllers data callbacks, 273 indicator lights, 274 issues, 267 logitech, 268 pause button, 274 reading data, polling accelerometer data, 271 extendedgamepad controls, NSTimer, 271 touchesbegan: method, 271 tractor beam action, 271 snapshotting, 275 types extended controllers, 268 standard controllers, 268 Wireless Controller controller array, 270 GCControllerDidConnectNotification, 270 setup Controllers: method, 270 startwirelesscontrollerdiscovery WithCompletionHandler, 269 UFO main screen, 269 viewdidload: method, 270 Game Kit, 1 2 Game Center, 2 networking, 2 voice chat, 3 Game Kit networking, 128 Bistromath, 129 Handshake, 129 sessions, Bluetooth, 130 GSessionDelegate protocol, 132 limitations, 132 peer to peer networking, 131 Ranges and Data Rates, 131 GKVoiceChatService class, 124 Graphical User Interface(GUI), 237 add ang remove players, 110 cancellations and failures, 110 GKMatch object, 110 inviting friend, game, 109 itunes connect, 108 MatchmakerViewController creation, 108 push notification, 111 UFOViewController.xib, 107 H HTTP response, 256

4 280 Index I, J, K In-app purchase App IDs, 216 best selling game, 211 developer approval, 227 Submit Now option, 228 Submit with Binary option, 228 freemium, 209, 211 GUI screenshot, 226 in UFOs code snippet, 232 viewdidload method, 232 ios receipt validation, 7 GUID, 232 NSApplicationMain function, 230 NSBundle, 230 itunes Connect configuration auto-renewable subscriptions, consumable, 213 initial configuration, 216 localized description, 215 manage button, 212 non-consumable, non-renewing subscriptions, 214 screenshot, 216 set up, 213 subscription duration, 215 products presentation productarray class, 219 products list, 220 productsrequest method, 219 UITableViewCellStyleSubtitle, 220 purchasing code sandbox, 222 SKPaymentTransactionObserver protocol, 221 UFOStoreViewController class, 221 UIAlert, 221 purchasing multiple items, 222 receipts sandbox, 228 server address, 229 verifyreceipt method, 230 restorecompletedtransactions, 225 retrive product list, viewdidload method, 217 viewdidunload method, 217 sandbox, 225 set up SKProductsRequestDelegate, 217 StoreKit framework, 217 UFOStoreViewController, 217 test account, sign in, 226 Top Grossing apps download, 210 transaction process finishtransaction method, 225 NSUserDefaults, 224 recordtransactiondata method, 224 SKPaymentTransaction Observer, 222 unlockcontent method, 224 We Rule by ngmoco, 211 We Rule s built-in store, 210 Invitations, 103 acceptinvite parameter, 111 GameCenterManager class, 112 GKMatchmakerViewController, 113 match:player:didchangestate, 116 playerstoinvite parameter, sandbox, 114 UFOViewController, 113 itunes Connect achievement progress, 76 achievement protocol, 81 configuring achievement Achievement ID attribute, 72 Achievement Reference Name attribute, 72 Game Center portal, 70 Hidden attribute, 72 Points attribute, 72 configuring Achievement, 70 creating achievement Abduct 25, 72 Earned Description attribute, 73 Image attribute, 73 Language attribute, 73 Pre-earned Description attribute, 73 Title attribute, 73 Game Center configuration, 17 GameCenterManager, landing page, 15 loading achievement earnedachievementcache, 79 GkAchievement, 80

5 Index 281 loadachievementswith CompletionHandler, 79 percentcomplete, 80 reportachievement WithCompletionHandler, 80 submitachievement percentcomplete method, 79 modified progress achievement, 77 presenting achievement, 74 Apple s default GUI, 76 Apple s unearned image, 76 GKAchievementViewController, 75 GKGameCenterViewController, 75 IBaction, 75 trigger, 75 UFOViewController, 75 UIbutton, 75 L Leaderboards, 35 challenges, 64 customization, 53 GameCenterManager class, 55 gcmanager, 57 retrievescore method, 57 segmented control, 56 default setting, 42 in Game Center Apple s leaderboard GUI, 37 custom GUI, 37 GKScore objects, 37 GameCenterManager class, 42 GKLeaderboardSet, 65 high-score method score-based system, 43 score submittal failure, 46 timer-based system, 43 UFOGameViewController, 44 in itunes Connect adding new leaderboard, 38 combined leaderboard, 41 Score Format Types, 39 local player s score, 63 Player IDs, 58 cellforrow method, 61 GameCenterManagerDelegate, 59 GKPlayer object, 59 NSMutableArray, 60 playernameforid, 62 posting a score, 64 presentation Apple s GUI, 49 custom GUI, 53 in social app or game, 36 M Matchmaking, 103 Auto-matching, 114, 116 findmatchesforrequest, 115 GKMatchmakerViewController, 106 GKMatchRequest, 115 GKMatchRequest object, 106 GUI add ang remove players, 110 cancellations and failures, 110 GKMatch object, 110 inviting friend, game, 109 itunes connect, 108 MatchmakerViewController creation, 108 push notification, 111 UFOViewController.xib, 107 invitations (see Invitations) player attributes, 117, 119 Game Center, 121 GameCenterManager class, 122 groups, 116 hosting matches, 123 limitations, 118 playergroup property, 117 protocols, 122 rules, 119 scenarios, 105 top-selling PC games, 104 Metadata, 260 Mirroring, 262 N, O Network design, 141 cheating prevention, 150 Clan Lord, 141

6 282 Index Network design (cont.) client-to-host network benefits of, 145 visual representation, 144 dedicated server, 146 headless client, 146 hybrid network, 146 keep alive message, 150 mesh/partial mesh network, 146 packet reliability attributes, 147 ordering attribute, priority attribute, retry attribute, peer-to-peer network, 142 disadvantages, 143 visual representation, 143 weaknesses and drawbacks, 143 prediction and extrapolation, 149 ring network, 145 sending datas, 148 state and server messages, 150 Sunk Cost Fallacy, 151 timeout-related disconnections, 150 tree network, 146 P, Q Peer Picker benefits of, 127 Bluetooth peers incoming invitation, 136 peer finding, 134 UIAlert, 133 waiting for connection, 135 enable bluetooth, prompt to, 135 Game Center networking, 128 Bistromath, 129 Handshake, 129 GKPeerPickerConnectionTypeNearby, 133 GKPeerPickerConnectionTypeOnline, 133 GKPeerPickerControllerDelegate, 137 peerpickercontroller, GKSession object, 136 localmultiplayergamebuttonpressed, 132 Permissions ACAccountStore, 252 property, 252 high-level permissions, 251 lower-level permissions, 251 publish-to-stream permission, UFOs request, 253 PlayerIndex property, 274 R Reading data, polling accelerometer data, 271 extendedgamepad controls, NSTimer, 271 touchesbegan: method, 271 tractor beam action, 271 S Sea Wolf game, 35 Second screen hidden property, 264 playbuttonpressed method, 264 tractor beam events, 264 UFOGameViewController class, widescreen, Apple TV, 265 SLComposeViewController, 247 Snapshotting, 275 Social gaming, 1 Sunk Cost Fallacy, 151 T Turned-based gaming, 179 GKTurnedBasedEventHandler handleinvitefromgamecenter, 195 handlematchended, 195 handleturneventformatch, 195 GKTurnedBasedMatchmakerViewController delegate methods, 184 GKLocalPlayer, 184 GKMatchRequest, 183 turned-based match, 183 match-based game code snippet, 187 completed form, 187 NSData, 188 NSPropertyListSerialization, 188 participants array, 188 match end checkwinner, 191 GKTurnBasedMatchOutcomeLost, 192

7 Index 283 GKTurnBasedMatchOutcomeWon, 192 makemove method, 192 navigation controller-based project, 180 authentication method, 182 delegate method, GameCenterManager class, 181 game view, 181 GKTurnedBasedMatchmaker ViewController, 181 IBAction method, 182 tic-tac-toe game, viewdidload method, 182 NSTimeInterval, 192 player exchanges, 192 initiator, 193 recipients, 193 player reminders, 194 player timeouts, 192 programmatic matches, 194 progress game data dictionary, 189 gamedictionary, 189 match data, 190 quit or forfeit, 192 tic-tac-toe sample app IBAction method, 186 interface builder, 186 makemove method, 186 tictactoegameviewcontroller class, 185 Words with Friends, 179 Tweet Composer addimage, 239 addurl, 239 completionhandler property, 239 drawback, 238 setinitialtext, 239 SLComposeViewController, 239 SLServiceTypeTwitter, 239 website, 239 Twitter Custom Tweets ACAccountype, 240 account property, 242 endpoint, 241 granted variable, 241 metadata, 242 NSData, 242 postrequest method, 242 SLRequest method, using array, 241 ios 7, 237 Tweet Composer, addimage, 239 addurl, 239 completionhandler property, 239 drawback, 238 setinitialtext, 239 SLComposeViewController, 239 SLServiceTypeTwitter, 239 website, 239 UFOs, 235 alertview set up, 236 exitaction function, 236 Types extended controllers, 268 standard controllers, 268 U UFOs, 1, 3 abductcow method, 10, 14 accelerometer delegate, setting up, 5 viewdidload method, 6 alert view delegate, 246 exitaction: method, 245 file structure, 4 gameplay view, 4 group tree structure, UFOAppDelegate.h and UFOAppDelegate.m files, 5 group view structure, UFOGameViewController.m file, 5 hittest method, 10, 13 insertsubview method, 10 itunes Connect configuration, 15 moveplayer method, 8 myplayerimageview, 7 objectives, 4 score label, 7 shouldautorotatetointerfaceorientation, 8 spawing and moving cows, 11 touchesbegan event, 9 UIAlert, 256 URL, 254

8 284 Index V Voice Chat audio session, 198 channels, 199 for Game Kit adding a microphone, 206 AVAudioSession, 201 AVFoundation.framework, 203 GKVoiceChatClient, 202 modifications to GameCenterManager class, 206 sending and receiving voice data, 202 setupvoicechat, 204 UFOVoiceChatClient, 205 GKMatch, 197 monitoring player state changes, 200 start and stop methods, 199 volume and mute, 200 Voice over Internet Protocol (VOIP), 197 W, X, Y, Z Wireless controller controller array, 270 GCControllerDidConnectNotification, 270 setup Controllers: method, 270 startwirelesscontrollerdiscovery WithCompletionHandler, 269 UFO main screen, 269 viewdidload: method, 270 World Wide Developers Conference (WWDC), 179, 267 World Wide Web Consortium (W3C), 242