G

game
  collision detection
  initializing
  multiplayer
    connecting peers
    game loop
    header file
    initialization
    interface
    sending and receiving data
    setup
    synchronization
  user interaction
Game Center
  matchmaking
game development, design patterns
Game Kit
  connection
  data, sending and receiving
  Game Center
  header file
  multiplayer example
    connecting peers
    game loop
    header file
    initialization
    interface
    sending and receiving data
    setup
  network packet
  overview
  peer picker
  peer states
  session
    creating
game loop
  implementing
  synchronization
geocoding, reverse.
    See reverse geocoding.
geomagnetic data
GeoNames, 2^nd
  finding altitude
  findNearestIntersection
  gtopo, 2^nd
  srtm, 2^nd
  timezone
  TouchJSON example
  XML-based information
gesture
  accelerometer and
  recognizing
getDistanceFrom
g-force
GKPeer PickerControllerDelegate
GKPeerConnectionTypeNearby
GKPeerConnectionTypeOnline
GKPeerPickerConnectionTypeNearby
GKPeerPickerController, 2^nd
GKPeerPickerControllerDelegate, methods
GKPeerStateConnected
GKPeerStateDisconnected
GKSendDataReliable
GKSendDataUnreliable
GKSession, delegate methods
GKSessionDelegate
  implementing
  methods
GKTanks
GKTennis
  collision detection
  connecting peers
  game loop
  header file
  initialization
  interface
  sending and receiving data
  setup
  user interaction
Gmail, using to set up iTunes test user
goBack
goForward
Google maps, integrating
Google Spell API
Google, and iPhone users
GPS
  built-in
  location awareness
  specifications
gradient
  drawing, in Quartz
  functions
  linear, three-color
graphical context
  in Quartz
  methods
  stack
  transformations and
graphical state
  maintaining in stack
  managing
  methods
  selecting colors in
  setting in Quartz
gravity
  checking
  data, vs. movement data
  measuring relationship to