NSArray gives NSZombie error - iphone

Question

I am trying to pass a single array object (that is a nsdictionary of several values) back to my main view.
basicly when I set the view up I parse some xml into an array of dictionaries. I then set up my tableview with one of the values inside the NSdictionary, this value is also used to set up the alphabetical scroller and section titles. (this is done in a method I created)
At the end of that method I call [self.tableView reloadData]; every thing loads up perfectly and everything displays fine.
Now what I am trying to do is set it up so that when a cell is selected, I check the value inside the cell.textlabel and use that as a predicate to check against my array of dictionaries once It finds the corresponding entry I want to pass that dictionary up to the main view with a delegate I have made.
however I am getting a error, that I think might be happening due to my reloadData.. but am not sure.
This is what my predicate looks like.
NSPredicate *pred = [NSPredicate predicateWithFormat:#"%K like %#",#"MANUFACTURER",cell.textLabel.text];
NSArray *filter = [myDataArray filteredArrayUsingPredicate:pred]; //error happens here
//check to see if the value is the correct one
NSLog(#"My Filtered array = %#", filter);
//once problem has been found set up the delegate here.
and this is the error message I receive.
2011-10-31 10:43:57.333 code[5812:207] *** -[__NSArrayM filteredArrayUsingPredicate:]: message sent to deallocated instance 0x6874210
myDataArray is created in the NSXMLParser delegates as listed below.
//.h
NSMutableArray *myDataArray;
}
#property (nonatomic, retain) NSMutableArray *myDataArray;
//.m
#pragma mark - Parsing lifecycle
- (void)startTheParsingProcess:(NSData *)parserData
{
//myDataArray = [NSMutableArray arrayWithCapacity:8]; // not even sure if this is needed as its declared later on.
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];
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
if([elementName isEqualToString:#"Row"])
{
manufactureMutableDictionary = [[NSMutableDictionary alloc] initWithDictionary:attributeDict];
}
if([elementName isEqualToString:#"Rows"])
{
myDataArray = [NSMutableArray arrayWithCapacity:8];
}
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
if([elementName isEqualToString:#"Row"])
{
[myDataArray addObject:manufactureMutableDictionary];
}
[manufactureMutableDictionary release];
manufactureMutableDictionary = nil;
}
Any help would be greatly appreciated, also do you think I am going about passing all the values of the dictionary the right way?

Answer 1

You are using an autoreleased array
myDataArray = [NSMutableArray arrayWithCapacity:8];
You have properties set up so use them e.g.
self.myDataArray = [NSMutableArray arrayWithCapacity:8];
or even better
NSMutableArray *tmpMyDataArray = [[NSMutableArray alloc] initWithCapacity:8];
self.myDataArray = tmpMyDataArray;
[tmpMyDataArray release]; tmpMyDataArray = nil;