The sample has been tested for memory leaks before I published it. It’s impossible to point out the leaks in your code from what you’ve posted, Core Data Helper returns an autoreleased array so there’s no leak there.

// Björn

I’ve used the guts in my application and its working well apart from memory leaks (with your new version).

There is an initial one, both in my app plus also your code – as can be seen if you run it with Performance Tools/ Leaks. As the sample is fairly simple, it gets away with it.

But on mine, as I reload the XML when requested (for an update check), it crashes after a few times.

The problem seems to be in Core Data Helper where, as far as I can see, mutableFetchResults is allocated but not released. I’ve tried adding it to an Autorelease pool, but it always crashes immediately then!

I’m still coming to terms with memory management (reading all that I can on it), so apologies if this is obvious to others.

Any help would be warmly welcomed.

Chris.

Thanks heaps for the tips, I’m getting on them now to see if I can work it out. I’ve been trying for a while to get the data in where I want it but keep running into walls so I hope I can find a way through. I’m trying to get the extra data info from the detail view into the table view but its proving to be a problem so far. I don’t know if I have to add extra attributes at the second level or if I can just pull the data in from level 3; driving me mad at the moment. I can view the data from object in an array but I just can’t isolate it to use in the TableView. Very frustrating. Anyway, thanks for the links I’ll have a look and see what I can work out from there

Check out the samples from Apple. There’s a great sample showing how to efficiently add thumbnails to table rows: http://developer.apple.com/iphone/library/samplecode/LazyTableImages/Introduction/Intro.html#//apple_ref/doc/uid/DTS40009394

// Björn

try reading this http://petermcintyre.wordpress.com/2010/02/24/full-function-core-data-example-app/

Just want to say thanks for such a great tutorial and example code, its been a great help in getting me started in Core Data and building apps for the iPhone in general. I’ve managed to understand how most everything works in your example but I’m struggling with creating a detailed TableView. I want to add a thumbnail and description to the TableView but I can’t get to the data. I’m not sure how to go about it as the attribute data doesn’t seem to be available until the detail view is displayed, so I’m not sure where I should be looking. Grateful for any help you might be able to give me for this.

After several attempts, i have narrowed the portion of the error to the following code i have.

else if([elementName isEqualToString:@"Staff"])
{

Staff *s = (Staff *)[NSEntityDescription insertNewObjectForEntityForName:@"Staff" inManagedObjectContext:managedObjectContext];
NSLog(@”%@”,@”Before setting values”);
[s setName:[attributeDict objectForKey:@"name"]];
[s setEmail:[attributeDict objectForKey:@"email"]];
[s setPhone:[attributeDict objectForKey:@"phone"]];
[s setPosition:[attributeDict objectForKey:@"position"]];

[currentCourse addCourseToStaffObject:s];
NSLog(@”%@”,@”After setting values”);
NSLog(@”%@”,s.Name);
}

And this are the response i got from the console

2010-07-09 12:01:44.870 StaffDirectory[596:207] Before setting values
2010-07-09 12:01:44.871 StaffDirectory[596:207] After setting values
2010-07-09 12:01:44.872 StaffDirectory[596:207] *** -[Staff Name]: unrecognized selector sent to instance 0×161d610
2010-07-09 12:01:44.872 StaffDirectory[596:207] *** Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘*** -[Staff Name]: unrecognized selector sent to instance 0×161d610′
2010-07-09 12:01:44.873 StaffDirectory[596:207] Stack: (
807902715,
2426455305,
808284155,
807854166,
807706786,
18269,
811133086,
7450485,
7465080,
811130623,
16985,
9320,
814713539,
814750709,
814739251,
814722434,
814748641,
839148405,
807687520,
807683624,
814715661,
814752238,
8964,
8818
)

I greatly appreciate the help, thanks again for the fast response.

Jake.

Thanks for the fast response earlier. I appreciate the help.
Ron W