iOS - encoding/decoding enums - crash on accessing after relaunch -

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what doing wrong? encoding/decoding enum type properly?

gamesettings interface:

typedef enum {     catwhite = 0,     catblack = 1,     catorange = 2 } catcolor;  ... catcolor catcolor; ... @property catcolor catcolor;

gamesettings implementation:

@synthesize catcolor;  ...  + (gamesettings*)getinstance {     if (sharedsingleton == nil) {         sharedsingleton = [[super allocwithzone:null] init];         sharedsingleton.catcolor = catwhite;     }     return sharedsingleton; }     -(void)encodewithcoder:(nscoder *)coder {         [coder encodeint:self.catcolor forkey:@"catcolor"];     }      -(id)initwithcoder:(nscoder *)coder {         if((self = [super init])) {             self.catcolor = [coder decodeintforkey:@"catcolor"];         } nslog(@"initwithcoder: %d", self.catcolor); //this logs correct int         return self;     }  appdidfinishlaunching:      - (void)applicationdidfinishlaunching:(uiapplication *)application {              nsuserdefaults *defaults = [nsuserdefaults standarduserdefaults];         nsdata *data = [defaults objectforkey:@"gamesettings"];         gamesettings *ggamedata = [nskeyedunarchiver unarchiveobjectwithdata:data];         if(ggamedata != null) {             gamesettings *settings = [gamesettings getinstance];             settings.catcolor = ggamedata.catcolor;          }else {             gamesettings *settings = [gamesettings getinstance];             settings.catcolor = catwhite;         }         ...     }

save settings:

gamesettings* settings = [gamesettings getinstance];  nsuserdefaults *defaults = [nsuserdefaults standarduserdefaults]; nsdata *data = [nskeyedarchiver archiveddatawithrootobject:settings]; [defaults setobject:data forkey:@"gamesettings"]; [defaults synchronize];

the crash (program received signal: “exc_bad_access”) comes when re-launch app , try access game settings:

gamesettings* settings = [gamesettings getinstance]; nslog(@"settings: %d", settings); //exc_bad_access nslog(@"catcolor: %d", settings.catcolor); //exc_bad_access

why can't access gamesettings singleton after re-launch?

are sure want use applicationdidfinishlaunching there? when resurrect program, may invoking awakefromnib instead of applicationdidfinishlaunching (source: http://www.cimgf.com/2008/03/26/cocoa-tutorial-awakefromnib-vs-applicationdidfinishlaunching/ ).


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