Split an NSString

Question

Quick question. I need to split an NSString, if it contains a certain substring. Can someone show me an example of how to do this?

// good string
string = RESULT: 123.23

// bad string (has no result prefix)
string = asldkfjasdlkfj

if( string has "RESULT: " in it )
{
   string2 = (something that returns the 123.23 part)
} 

Thanks very much!

Answer 1

The best way to split a NSString is:

- (NSArray *)componentsSeparatedByString:(NSString *)separator;

I hope you found it usefull

Answer 2

- (NSString *)splitString {
    NSRange range = [myString rangeOfString:@"RESULT: "];
    if (range.location != NSNotFound) {
        return [myString substringFromIndex:NSMaxRange(range)];
    }
    return nil;
}

Edited to return suffix, not prefix

Answer 3

Alright then, two quick methods:

-[NSString hasPrefix:]
-[NSString substringFromIndex:]

However don't forget to handle invalid cases.

Answer 4

For even greater flexibility, you could try NSScanners.