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

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    <p>What am I doing wrong? Am I encoding/decoding the enum type properly?</p> <p>GameSettings interface:</p> <pre><code>typedef enum { CatWhite = 0, CatBlack = 1, CatOrange = 2 } CatColor; ... CatColor catColor; ... @property CatColor catColor; </code></pre> <p>GameSettings implementation:</p> <pre><code>@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 the 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; } ... } </code></pre> <p>Save settings:</p> <pre><code>GameSettings* settings = [GameSettings GetInstance]; NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; NSData *data = [NSKeyedArchiver archivedDataWithRootObject:settings]; [defaults setObject:data forKey:@"GameSettings"]; [defaults synchronize]; </code></pre> <p>The crash (Program received signal: “EXC_BAD_ACCESS”) comes when I re-launch the app and try to access the game settings:</p> <pre><code>GameSettings* settings = [GameSettings GetInstance]; NSLog(@"settings: %d", settings); //EXC_BAD_ACCESS NSLog(@"catColor: %d", settings.catColor); //EXC_BAD_ACCESS </code></pre> <p>Why can't I access the GameSettings singleton after a re-launch? </p>
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    1. COI'm assuming that GameSettings inherits from NSObject, but is that the case? Figure I ought to ask. Doesn't really help that your trimming out bits of the interface makes most of it out of context, either. Also, what does `GetInstance` look like?
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    2. COCan you post the stack trace from the debugger console?
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    3. CO@nil, yes, it inherits from NSObject. I have added the Get Instance method above.
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