Difference between NSString literals

Question

What is the difference between these two lines?

NSString * string = @\"My String\";
NSString * string = [[[NSString alloc] initWithString:@\"MyString\"] auto         


        

Answer 1

One is a literal string, which persists for the life of the executing app. The other may be a dynamic object that only persists until autoreleased. (It may also be a literal string, if the system decides to optimize it that way -- there are no guarantees it won't.)