How to split string into substrings on iOS?

Question

I received an NSString from the server. Now I want to split it into the substring which I need. How to split the string?

For example:

substrin

Answer 1

NSString has a few methods for this:

[myString substringToIndex:index];
[myString substringFromIndex:index];
[myString substringWithRange:range];

Check the documentation for NSString for more information.