Replacing list of strings in a string (Objective-c 2.0)

Question

For example I'd like to replace all occurrences of @"a" and @"b" in @"abcdabcd" with @"z". I'm currently doing this with repeated called to stringByReplacingOccurencesOfString:withString::

NSString *s1 = @"abcdabcd";
NSString *s2 = [[s1 stringByReplacingOccurencesOfString:@"a" withString:@"z"]
                 stringByReplacingOccurencesOfString:@"b" withString:@"z"];

What's a better way? I didn't find any similar methods that take an array of strings to replace.

Nicolas Bachschmidt · Accepted Answer · 2011-12-19 23:18:22Z

6

You can use regular expressions:

NSString *s2 =
[s1 stringByReplacingOccurrencesOfString:@"[ab]"
                              withString:@"z"
                                 options:NSRegularExpressionSearch
                                   range:NSMakeRange(0, s1.length)];

answered Dec 19, 2011 at 23:18

Nicolas Bachschmidt

6,5052 gold badges28 silver badges36 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Wevah Over a year ago

(If you're targeting OS X 10.7+/iOS 4.0+.)

Michael Dautermann · Accepted Answer · 2011-12-19 23:19:38Z

3

There's also NSMutableString's replaceOccurrencesOfString:withString:options:range: method (so you don't have to create a new NSString object for every replacement call you want to make). Documentation linked for you.

answered Dec 19, 2011 at 23:19

Michael Dautermann

89.7k18 gold badges174 silver badges223 bronze badges

Collectives™ on Stack Overflow

Replacing list of strings in a string (Objective-c 2.0)

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related