Accessing a variable in drawRect

[kgodard]

I'm trying to access an array that is passed into my view class when it is initialized.

In the initWithFrame it is passed in as follows

- (id)initWithFram:(CGRect)frame eventsArray:(NSMutableArray *)array {
if (self = [super initWithFrame:frame]) {
eventsArray = array;
}
return self;
}

The events array is defined and synthesized and I've tested it and at that point it has been passed in correctly and exists.

If I try to reference it from drawRect it is just an empty array. Can you not reference things from drawRect? I originally tried to build the array from the drawRect, but it also threw an error trying to access the managed object context.

[smasher]

I see you're not retaining the array you get - is it possible that the original array is autoreleased, or gets released or otherwise emptied by code in the original caller?

If you NSLog(@"%@:", eventsArray) in that init method, is the eventsArray ok there?

[kgodard]

Originally Posted by smasher

I see you're not retaining the array you get - is it possible that the original array is autoreleased, or gets released or otherwise emptied by code in the original caller?

If you NSLog(@"%@:", eventsArray) in that init method, is the eventsArray ok there?

I tried adding retain to the eventsArray and the eventsArray in the caller and it didn't change.

I am using NSLog to check and yes it is the correct information in the init method.

[smasher]

If it's not a retain issue, you could try logging the *address* of the array in the init and again in the drawRect.

NSLog(@"%d", eventsArray)

If the address changes, then someone is changing the value of eventsArray somewhere. If the address does not change but the contents do, then someone else has a pointer to the array you're passing in is removing the contents.

[kgodard]

Originally Posted by smasher

If it's not a retain issue, you could try logging the *address* of the array in the init and again in the drawRect.

NSLog(@"%d", eventsArray)

If the address changes, then someone is changing the value of eventsArray somewhere. If the address does not change but the contents do, then someone else has a pointer to the array you're passing in is removing the contents.

The address is normal in init and is 0 in drawRect. I think I'm going to do it differently and create the array in init rather than passing it in.

[smasher]

Originally Posted by kgodard

The address is normal in init and is 0 in drawRect. I think I'm going to do it differently and create the array in init rather than passing it in.

Strange - if the address changes to 0, then either someone is doing eventsArray=nil or you're dealing with a different object. You could try logging the address of "self" to see if it's the same object.

Could also be a buffer overrun somewhere, but that's much less likely.