CODEWITHSUNDEEP
iphoneobjective-ciphone-sdk-3.0
Douglas
Douglas

Reputation: 1258

Passing an NSArray as a parameter?

I am trying to get JSON data loaded from a NSURLConnection delegate to send the array of objects back to the tableview that called it.

The delegate object is initialized with callback to send back to

NSArray *returnArray;
ResultsTableRoot *callback;

JSON handling method 

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {      
    [connection release];

    NSString *responseString = [[NSString alloc] initWithData:responseData 
                                                     encoding:NSUTF8StringEncoding];
    [responseData release];

    NSError *error;
    SBJSON *json = [[[SBJSON alloc] init] autorelease];
    returnArray = [json objectWithString:responseString 
                                   error:&error];
    [responseString release];

    //////////////////////////////////////////////
    // Send data back to table view
    [callback resultsArrayReciever:returnArray];
}

The array can't be accessed from here, the tableview I want to have the information, however the method is called

-(void)resultsArrayReciever:(NSArray *)array {
    // Code executed    
    if(array) {
         // Code never executes, array isnt there
    }
}

If you have a better way to go about this whole thing, it is more than welcome!!

Upvotes: 0

Views: 312

Answers (2)

Adrian Kosmaczewski
Adrian Kosmaczewski

Reputation: 7966

  1. Check the NSError instance to see if there wasn't some problem while deserializing the JSON;

  2. Try retaining the object:

    NSError *error;
SBJSON *json = [[SBJSON new] autorelease];
returnArray = [[json objectWithString:responseString error:&error] retain];
[responseString release];
[callback resultsArrayReciever:returnArray];
[returnArray release];

Upvotes: 0

Niels Castle
Niels Castle

Reputation: 8069

The returnArray is probably autoreleased. Try retain/releasing it in your methods.

If it is autoreleased the contents will be released in your run-loop and therefore disappear by the time you want to access it.

Upvotes: 1

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