Question

In my app I want to copy a custom class from one array to another array. So I implemented copyWithZone for this class. Xcode analyze warning me that every line with [alloc] or [copy] are leaking memory. How can I tell if it’s really leaking or it’s the copied instance that I need?

@implementation MyClass

- (id)copyWithZone:(NSZone *)zone {

    MyClass *copy = [[MyClass allocWithZone:zone] init];
    if (copy){
        copy.uniqueId = [uniqueId copy];
    }

    return copy; 
}

Answer 1

Is your uniqueId property declared as a retain property? If so, this line is leaking:

copy.uniqueId = [uniqueId copy];

Change it to:

copy.uniqueId = [[uniqueId copy] autorelease];