c# - GKLocalPlayer.LocalPlayer null on some simulators -

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i'm having issue integrating game center monogame game.

what have:

void initgamecenter()     {         gamecentermanager = new gamecentermanager();         setauthenticatehandler();     }      void setauthenticatehandler()     {         gklocalplayer.localplayer.authenticatehandler = (ui, error) => {             if (ui != null)             {                 controller.presentviewcontroller(ui, true, null);             }             else if (gklocalplayer.localplayer.authenticated)             {                 currentleaderboard = gamecentermanager.reloadleaderboard(leaderboardid);             }             else {                 var alert = new uialertview("game center account required", "need login game center!", null, "retry", null);                 alert.clicked += (sender, e) => {                     //gklocalplayer.localplayer.authenticated();                 };                 alert.show();             }         };     }

on simulators stops @ first line of code in setauthenticatehandler() method throwing exception because gklocalplayer.localplayer null.

where works:

ipad 2 (9.2) device every simulator of iphone newer 5 (iphone 5s, 6, 6s whatever ios version).

where doesn't work: every iphone simulator older tan 5s (iphone 5, 4s)

the methods showed in appdelegate's finishedlaunching() method, since there no viewcontroller.cs in monogame.

any clues?

could signature issue. take @ class details. signature changes @ ios 6.

from docs:

// // shows how authenticate on both ios 6.0 , older versions // if (uidevice.currentdevice.checksystemversion (6, 0)) {     //     // ios 6.0 , newer     //     gklocalplayer.localplayer.authenticatehandler = (ui, error) => {          // if ui null, means user authenticated,     // example, if user used game center directly log in      if (ui != null)             current.presentmodalviewcontroller (ui, true);     else {         // check if authenticated:         var authenticated = gklocalplayer.localplayer.authenticated;     }     console.writeline ("authentication result: {0}",err);     }; } else {     // versions prior ios 6.0     gklocalplayer.localplayer.authenticate ((err) => {         console.writeline ("authentication result: {0}",err);     }); };

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