nsregularexpression

I'm getting a weird warning, and as a result my regex search isn't working. Here's the line: NSRange r = [HTML rangeOfString:@"\|(.*)\|" options:NSRegularExpressionSearch]; Where HTML is a string that I'm sure contains a single match for the above regex. The warning is only on the first occurrence of "\|", not on both. Any help is much appreciated! You're getting the warning because \| is not a valid escape sequence in Objective-C (or C or C++ for that matter). The compiler is ignoring that and just using a raw | character instead, so the string you're actually passing in is @"|(.*)|" . To get

Does NSRegularExpression support named capture groups? It doesn't look like it from the documentation , but I wanted to check before I explore alternative solutions. Named grouping is not supported in iOS, all you can do as I see is to make use of Enum : Enum: typedef enum { kDayGroup = 1, kMonthGroup, kYearGroup } RegexDateGroupsSequence; Sample Code: NSString *string = @"07-12-2014"; NSError *error = NULL; NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"(\\d{2})\\-(\\d{2})\\-(\\d{4}|\\d{2})" options:NSRegularExpressionCaseInsensitive error:&error]; NSArray

I have a C# project I'm intending to port to Objective-C. From what I understand about Obj-C, it looks like there's a confusing variety of Regex options but I can't see anything about a way of doing a replace with callback. I'm looking for something that is the equivalent of the C# MatchEvaluator delegate or PHP's preg_replace_callback. An example of what I want to do in C# is - // change input so each word is followed a number showing how many letters it has string inputString = "Hello, how are you today ?"; Regex theRegex = new Regex(@"\w+"); string outputString = theRegex.Replace

I have to detect whether a string contains any special characters. How can I check it? Does Swift support regular expressions? var characterSet:NSCharacterSet = NSCharacterSet(charactersInString: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLKMNOPQRSTUVWXYZ0123456789") if (searchTerm!.rangeOfCharacterFromSet(characterSet).location == NSNotFound){ println("Could not handle special characters") } I tried the code above, but it matches only if I enter the first character as a special character. Your code check if no character in the string is from the given set. What you want is to check if any

Why is this code only spitting out the entire regex match instead of the capture group? Input @"A long string containing Name:</td><td>A name here</td> amongst other things" Output expected A name here Actual output Name:</td><td>A name here</td> Code NSString *htmlString = @"A long string containing Name:</td><td>A name here</td> amongst other things"; NSRegularExpression *nameExpression = [NSRegularExpression regularExpressionWithPattern:@"Name:</td>.*\">(.*)</td>" options:NSRegularExpressionSearch error:nil]; NSArray *matches = [nameExpression matchesInString:htmlString options:0 range