CODEWITHSUNDEEP
iosobjective-cregexswiftnsregularexpression
leizh00701
leizh00701

Reputation: 1963

How can I replace string using NSRegularExpression in iOS?

For example the regular expression is :

A(B)C

A,B,C all represent some string.I want all the string matches A(B)C replacing by B.

If the NSString is AABCAABCBBABC:

The answear will be ABABBBB.How to do that? Thank you.

I give a more specific example:

<script\stype="text/javascript"[\s\S]*?(http://[\s\S]*?)'[\s\S]*?</script>

The answer is some script mathes and http:// url matches . I want to use each http:// url matches to replace each script matches. Did I explain it clearly?

Upvotes: 0

Views: 1155

Answers (1)

Paresh Navadiya
Paresh Navadiya

Reputation: 38259

One solution can be using stringByReplacingMatchesInString:

NSString *strText = @"AABCAABCBBABC";
NSError *error = nil;
NSRegularExpression *regexExpression = [NSRegularExpression regularExpressionWithPattern:@"ABC" options:NSRegularExpressionCaseInsensitive error:&error];
NSString *strModifiedText = [regexExpression stringByReplacingMatchesInString:strText options:0 range:NSMakeRange(0, [strText length]) withTemplate:@"B"];
NSLog(@"%@", strModifiedText);

Another solution can be using stringByReplacingOccurrencesOfString :

strText = [strText stringByReplacingOccurrencesOfString:@"ABC" withString:@"B"];

Upvotes: 2

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