How do you use NSRegularExpression's replacementStringForResult:inString:offset:template:

Question

I have a series of characters that I want to match with a regular expression, and replace them with specific strings depending on what they are.

Example:

In

Answer 1

You should use

- (NSString *)stringByReplacingMatchesInString:(NSString *)string options:(NSMatchingOptions)options range:(NSRange)range withTemplate:(NSString *)template

or

- (NSUInteger)replaceMatchesInString:(NSMutableString *)string options:(NSMatchingOptions)options range:(NSRange)range withTemplate:(NSString *)template

with string being "This is the input string where i want to replace 1 2 & 3" and template being either "ONE", "TWO" or "THREE".