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Swift extension for Native String class to support Regex match and Regex replace. Credit - http://www.swift-studies.com/blog/2014/6/12/regex-matching-and-template-replacement-operators-in-swift
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| import Foundation | |
| struct Regex { | |
| var pattern: String { | |
| didSet { | |
| updateRegex() | |
| } | |
| } | |
| var expressionOptions: NSRegularExpressionOptions { | |
| didSet { | |
| updateRegex() | |
| } | |
| } | |
| var matchingOptions: NSMatchingOptions | |
| var regex: NSRegularExpression? | |
| init(pattern: String, expressionOptions: NSRegularExpressionOptions, matchingOptions: NSMatchingOptions) { | |
| self.pattern = pattern | |
| self.expressionOptions = expressionOptions | |
| self.matchingOptions = matchingOptions | |
| updateRegex() | |
| } | |
| init(pattern: String) { | |
| self.pattern = pattern | |
| expressionOptions = NSRegularExpressionOptions(0) | |
| matchingOptions = NSMatchingOptions(0) | |
| updateRegex() | |
| } | |
| mutating func updateRegex() { | |
| regex = NSRegularExpression(pattern: pattern, options: expressionOptions, error: nil) | |
| } | |
| } | |
| extension String { | |
| func matchRegex(pattern: Regex) -> Bool { | |
| let range: NSRange = NSMakeRange(0, countElements(self)) | |
| if pattern.regex != nil { | |
| let matches: [AnyObject] = pattern.regex!.matchesInString(self, options: pattern.matchingOptions, range: range) | |
| return matches.count > 0 | |
| } | |
| return false | |
| } | |
| func match(patternString: String) -> Bool { | |
| return self.matchRegex(Regex(pattern: patternString)) | |
| } | |
| func replaceRegex(pattern: Regex, template: String) -> String { | |
| if self.matchRegex(pattern) { | |
| let range: NSRange = NSMakeRange(0, countElements(self)) | |
| if pattern.regex != nil { | |
| return pattern.regex!.stringByReplacingMatchesInString(self, options: pattern.matchingOptions, range: range, withTemplate: template) | |
| } | |
| } | |
| return self | |
| } | |
| func replace(pattern: String, template: String) -> String { | |
| return self.replaceRegex(Regex(pattern: pattern), template: template) | |
| } | |
| } | |
| /* | |
| //e.g. replaces symbols +, -, space, ( & ) from phone numbers | |
| "+91-999-929-5395".replace("[-\\s\\(\\)]", template: "") | |
| */ |
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