Leaderboard in Game Center

Getting Started Newbie Questions
#1

Hello all,

I searched on web about implementing very basic usage of the Apple Game Center in my game, but could not find a clear example as a video or code.

Here is the specs:

-When game ends, update the score at Leaderboard in GameCenter, if the score greater than best score.

-When leaderboard button is clicked, browse to the leaderboard at GameCenter.

example parameters:

about leaderboard

Type: Single, Reference Name: bestofX, Leaderboard ID: bestofX

about game

local best;

local score;

I think this is a very basic concept for all games, If anyone replies this question with example code, the answer will be useful for all newbies like me.

#2

you dont need to check if the high score is greater than a previous high score

just send the score to GameCenter and it will check for you

I use the following to send my score

local function postingScore( event ) -- The shown Game Center popup was closed. end local function sendHighScore () gameNetwork.request( "setHighScore", { localPlayerScore = { category="highScoreTable", value=hScore }, listener = postingScore }) end

then for a button so you can browse the leaderboards add the following to a button

local function onGameNetworkPopupDismissed( event ) -- The shown Game Center popup was closed. end local leaderboardButton= function( event ) if event.phase == "release" then -- Display the leaderboard. gameNetwork.show( "leaderboards", { leaderboard = {timeScope="AllTime"}, listener=onGameNetworkPopupDismissed } ) end end
#3

hello again,

I tried to implement it. first I made 

local gameNetwork = require “gameNetwork”

loggedIntoGC = false

local function initCallback( event )

    if event.data then

        loggedIntoGC = true

        native.showAlert( “Success!”, “User has logged into Game Center”, { “OK” } )

    else

        loggedIntoGC = false

        native.showAlert( “Fail”, “User is not logged into Game Center”, { “OK” } )

    end

end

local function onSystemEvent( event ) 

    if event.type == “applicationStart” then

        gameNetwork.init( “gamecenter”, initCallback )

        return true

    end

end

Runtime:addEventListener( “system”, onSystemEvent )

to check my connection to game center and after i implemented your sample code in my project

local function postingScore( event )

    – The shown Game Center popup was closed.

end

local function sendHighScore ()

    gameNetwork.request( “setHighScore”,

    {

        localPlayerScore = { category=“bestofX”, value=score },

        listener = postingScore

    })

end

and i called this function at my endcondition as 

if loggedIntoGC then sendHighScore() end

in my other lua file i implemented game center leaderboard button

-----local function onGameNetworkPopupDismissed( event )

    – The shown Game Center popup was closed.

end

local function GoToLeaderboard(  )

  if loggedIntoGC then

        gameNetwork.show( “bestoffragile”, { leaderboard = {timeScope=“AllTime”},

        listener=onGameNetworkPopupDismissed } )

  end

end

and call this method as onRelease of a button

why my game center implementation does not work?

#4

you dont need to check if the high score is greater than a previous high score

just send the score to GameCenter and it will check for you

I use the following to send my score

local function postingScore( event ) -- The shown Game Center popup was closed. end local function sendHighScore () gameNetwork.request( "setHighScore", { localPlayerScore = { category="highScoreTable", value=hScore }, listener = postingScore }) end

then for a button so you can browse the leaderboards add the following to a button

local function onGameNetworkPopupDismissed( event ) -- The shown Game Center popup was closed. end local leaderboardButton= function( event ) if event.phase == "release" then -- Display the leaderboard. gameNetwork.show( "leaderboards", { leaderboard = {timeScope="AllTime"}, listener=onGameNetworkPopupDismissed } ) end end
#5

hello again,

I tried to implement it. first I made 

local gameNetwork = require “gameNetwork”

loggedIntoGC = false

local function initCallback( event )

    if event.data then

        loggedIntoGC = true

        native.showAlert( “Success!”, “User has logged into Game Center”, { “OK” } )

    else

        loggedIntoGC = false

        native.showAlert( “Fail”, “User is not logged into Game Center”, { “OK” } )

    end

end

local function onSystemEvent( event ) 

    if event.type == “applicationStart” then

        gameNetwork.init( “gamecenter”, initCallback )

        return true

    end

end

Runtime:addEventListener( “system”, onSystemEvent )

to check my connection to game center and after i implemented your sample code in my project

local function postingScore( event )

    – The shown Game Center popup was closed.

end

local function sendHighScore ()

    gameNetwork.request( “setHighScore”,

    {

        localPlayerScore = { category=“bestofX”, value=score },

        listener = postingScore

    })

end

and i called this function at my endcondition as 

if loggedIntoGC then sendHighScore() end

in my other lua file i implemented game center leaderboard button

-----local function onGameNetworkPopupDismissed( event )

    – The shown Game Center popup was closed.

end

local function GoToLeaderboard(  )

  if loggedIntoGC then

        gameNetwork.show( “bestoffragile”, { leaderboard = {timeScope=“AllTime”},

        listener=onGameNetworkPopupDismissed } )

  end

end

and call this method as onRelease of a button

why my game center implementation does not work?