copying a custom object

Question

I have an object called Layer that has some attributes and some methodes.

i need to pass Layer to a second view controller:

SecondVC *view = [self.storyb         


        

Answer 1

You will need to implement copy function to your object

In your Layer.m

- (id)copy
{
    Layer *layerCopy = [[Layer alloc] init];

    //YOu may need to copy these values too, this is a shallow copy
    //If YourValues and someOtherValue are only primitives then this would be ok
    //If they are objects you will need to implement copy to these objects too
    layerCopy.YourValues = self.YourValues;
    layerCopy.someOtherValue = self.someOtherValue;

    return layerCopy;
}

Now in your calling function

//instead of passing self.Layer pass [self.Layer copy]
view.Layer = [[Layer alloc] initWithMapLayer:[self.Layer copy]];