NSMutableArray changes to the copy causing changes in the parent NSMutableArray as well

Question

I have a NSMutableArray is my delegate that I am using in one of my view controllers as well.

So in viewDidLoad I make a mutable copy of my NSMutableArray like this

Answer 1

I assume you did not implemented the mutableCopyWithZone: correctly.

You need to implement the NSMutableCopying protocol for the objects you put in the array, this way you could pass a new instance of that object for that case.

- (id)mutableCopyWithZone:(NSZone *)zone
{
   YourCustomModel *aCopy = [[[self class] allocWithZone:zone] init];
   if (aCopy) {
     // set properties
}
   return aCopy
}