How do I use NSRange with this NSString?

Question

I have the following NSString:

productID = @\"com.sortitapps.themes.pink.book\";

At the end, \"book\" can be anything.... \"music\

Answer 1

You can try a backward search for the dot and use the result to get the desired range:

NSString *str = @"com.sortitapps.themes.pink.book";
NSUInteger dot = [str rangeOfString:@"." options:NSBackwardsSearch].location;

NSString *newStr =
   [str stringByReplacingCharactersInRange:NSMakeRange(dot+1, [str length]-dot-1)
                                withString:@"something_else"];