How to copy a NSMutableArray
There are multiple ways to do so:
NSArray *newArray = [NSMutableArray arrayWithArray:oldArray];NSArray *newArray = [[[NSMutableArray alloc] initWithArray:oldArray] autorelease];NSArray *newArray = [[oldArray mutableCopy] autorelease];These will all create shallow copies, though.
(Edit: If you're working with ARC, just delete the calls to autorelease.)
For deep copies use this instead:
NSMutableArray *newArray = [[[NSMutableArray alloc] initWithArray:oldArray copyItems:YES] autorelease];Worth noting: For obvious reasons the latter will require all your array's element objects to implement NSCopying.