Question

I have a method that sets up NSXMLParser with the correct data that I am pretty sure is causing a memory leak.

This is my first time using instriments to try and solve a memory leak and have got it down to the offending method..

by looking at the response caller value in instruments memory leak testing.

I am hoping you can tell me where the memory leak is here… because I release both myDataArray and parser… im just not sure where I am going wrong.. do I need to assign them nil also?

- (void)startTheParsingProcess:(NSData *)parserData
{
    [myDataArray release]; // clears array for next time it is used.
    myDataArray = [[NSMutableArray alloc] init];

    NSXMLParser *parser = [[NSXMLParser alloc] initWithData:parserData]; //parserData passed to NSXMLParser delegate which starts the parsing process 

    [parser setDelegate:self];
    [parser parse]; // starts the event-driven parsing operation.
    [parser release];
}

any help would be appreciated.

UPDATE:

I have made the changes to my application and when I run it on the simulator I do not get any memory leak errors..

however if I run it on my phone get this in the console…

2011-10-19 11:22:05.673 code[1299:707] -[__NSCFType section]: unrecognized selector sent to instance 0x1b9b80
2011-10-19 11:22:05.683 code[1299:707] CoreAnimation: ignoring exception: -[__NSCFType section]: unrecognized selector sent to instance 0x1b9b80
2011-10-19 11:22:07.949 code[1299:707] -[__NSCFType row]: unrecognized selector sent to instance 0x1b9b80
2011-10-19 11:22:07.951 code[1299:707] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFType row]: unrecognized selector sent to instance 0x1b9b80'
*** First throw call stack:
(0x35e9e8b3 0x366e61e5 0x35ea1acb 0x35ea0939 0x35dfb680 0x334a76cf 0x3353c713 0x30fd5 0x3352cd69 0x335a60ab 0x35cc32ab 0x35e72a57 0x35e726bd 0x35e71293 0x35df44e5 0x35df43ad 0x30fa4fed 0x334a7dc7 0x272f 0x26d8)

Answer 1

Try putting this in the .h

@property (nonatomic, retain) NSMutableArray *myDataArray

.m

@synthesize myDataArray

in the method...

- (void)startTheParsingProcess:(NSData *)parserData
{
    self.myDataArray = [NSMutableArray arrayWithCapacity:8];

    NSXMLParser *parser = [[NSXMLParser alloc] initWithData:parserData]; //parserData passed to NSXMLParser delegate which starts the parsing process 

    [parser setDelegate:self];
    [parser parse]; // starts the event-driven parsing operation.
    [parser release];
}