Objective-C NSString Reference Types

Question

I have a simple question. If I am declaring NSString (ref type) as shown below:

 NSString *johnsMoney = @\"200\";
    NSString *marysMoney = johnsMoney;

           


        

Answer 1

In your example the local variable marysMoney maintains a strong reference to the initial johnsMoney object. When the johnsMoney property is changed, the property no longer keeps a strong reference to the original value, but that value is still kept alive by the marysMoney strong variable.