NSString 처리 관련

// search

NSString *szToken = @"+";
NSString *szSearch = @"a+b+c+...";
NSRange subStr;
NSInteger iCurPos;

subStr = [szTmp rangeOfString:szSearch];

if ( subStr.location != NSNotFound )
{
	iCurPos = subStr.location;
}

- substringToIndex
- substringFromIndex
- substringWithRange

[ 참고 ]
http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/Reference/NSString.html