unrecognized selector sent to instance 0x5d18d60

abramodj · 08-08-2010, 04:52 PM

Hi everybody. I'm going crazy with this my little app... Please help me!!!

this is the source code of the app: smoking.zip

It only saves a .dat file with an NSMutableArray. Now, the first time you will launch the app, try to click the cigarette button sometimes: Everything should working fine. Ok, now close the app, re-open it, and click again on the button. This time the app will crash with the "unrecognized selector sent to instance 0x5d18d60" error. I was sure the problem was in saving the data, because when i commented the line "[theData writeToFile:dataFilePath atomically:YES];" in the "saveData" method the error disappeared. Later i discovered that it appears again if i try to read the data from the NSMutableArray.

Please take a moment to check my project and help me, beacause i'm going crazy about that!!

smasher · 08-08-2010, 07:10 PM

What's the rest of the error message, and where in the code does it crash? The error message should say what the object and selector are.

PS: your app delegate looks strange. Your init method doesn't call "self=[super init]", and it does a lot of work that is usually put in applicationDidFinishLaunching instead.

I believe the other issue is here:

Code:

		tempArray = [decoder decodeObjectForKey:@"smokeArray"];
		[self setSmokeArray:tempArray];

When you encode and then decode a NSMutableArray, you get a NSArray back. You probably fail when you try to send a method like "addObject:" to an array which is not mutable. You probably need this instead:

Code:

		tempArray = [[decoder decodeObjectForKey:@"smokeArray"] mutableCopy];
		[self setSmokeArray:tempArray];