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February 23, 2016 07:58
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Swift extension to NSMutableAttributedString adding methods for highlighting and replacing substrings
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| extension NSMutableAttributedString { | |
| func highlightStrings(stringToHighlight:String, usingRegex:Bool = false) { | |
| var useRegex:NSRegularExpressionOptions? | |
| if !usingRegex { | |
| useRegex = NSRegularExpressionOptions.IgnoreMetacharacters | |
| } | |
| let exp = NSRegularExpression(pattern: stringToHighlight, options: useRegex ?? nil, error: nil) | |
| let arr = exp.matchesInString(self.string, options: nil, range:NSRange(location: 0, length: self.length)) | |
| for s in arr { | |
| self.addAttribute(NSBackgroundColorAttributeName, value: UIColor.greenColor(), range: s.range) | |
| } | |
| } | |
| func replaceStrings(find:String, replace:String, usingRegex:Bool = false) { | |
| var useRegex:NSRegularExpressionOptions? | |
| if !usingRegex { | |
| useRegex = NSRegularExpressionOptions.IgnoreMetacharacters | |
| } | |
| let exp = NSRegularExpression(pattern: find, options: useRegex ?? nil, error: nil) | |
| let arr = exp.matchesInString(self.string, options: nil, range:NSRange(location: 0, length: self.length)) | |
| self.mutableString.replaceOccurrencesOfString(find, withString:replace, options:NSStringCompareOptions.RegularExpressionSearch, range:NSRange(location: 0, length: self.length)) | |
| } | |
| } |
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Not working with swift 2.0?