How to split the numbers and characters in to two strings in objective c?

I want to split the string li开发者_JAVA百科ke FG12344 in to FG and 12344 using Objective C. I don't how to do this, please help me in this issue?

For the characters:

NSString *characters = [@"FG12344" stringByTrimmingCharactersInSet:[NSCharacterSet decimalDigitCharacterSet]];

For the numbers:

NSString *numbers = [@"FG12344" stringByTrimmingCharactersInSet:[NSCharacterSet letterCharacterSet]];

you can use NSPredicate for similar cases.