Split Objective-C String

I have a string like this

NSString *string = @"开发者_StackOverflowfeng2zhong3"

and I want to split this string to feng2 and zhong3, how to do that?

Try:

NSString* feng = [string substringToIndex:4]
NSString* zhong = [string substringFromIndex:5]

EDIT:

Now that you have made it clear what your input data is like, one option is to use regexes to do the matches like this:

NSString* string = @"feng4shui5";
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"\D+\d+" options:NSRegularExpressionCaseInsensitive error:&error];
NSArray *matches = [regex matchesInString:string options:0 range:NSMakeRange(0, [string length])];
for (NSTextCheckingResult *match in matches) {
     NSRange matchRange = [match range];
     NSRange firstHalfRange = [match rangeAtIndex:1];
     NSRange secondHalfRange = [match rangeAtIndex:2];
     NSLog([userinput substringWithRange:matchRange]);
}

where string is the string that contains your input.

You could use +[NSString rangeOfCharacterFromSet:options:range:] with a +[NSCharacterSet decimalDigitCharacterSet] and get the substrings via the resulting ranges.

Or you could use NSScanner by using:

NSCharacterSet *digitSet = [NSCharacterSet decimalDigitCharacterSet];
NSScanner *scanner = [NSScanner scannerWithString:inputString];

... and successive calls of:

success = [scanner scanUpToCharactersFromSet:digitSet intoString:&namePart];
// ...
success = [scanner scanCharactersFromSet:digitSet intoString:&digitPart];
// ...

use substringFromIndex and substringToIndex methods

the below code is use full for you.it is working fine for your requirements

    NSMutableString *s = @"fig2sine3";
    NSCharacterSet *removeCharSet = [NSCharacterSet characterSetWithCharactersInString:@"0123456789"];
    array=[s componentsSeparatedByCharactersInSet:removeCharSet];

nslog(@"the devided strings %@",array);

This is absolutely useful for your requirement.