只需更新选择的Swift 3答案：
func matchesForRegexInText(regex: String!,text: String!) -> [String] {
do {
let regex = try NSRegularExpression(pattern: regex,options: [])
let nsString = text as NSString
let results = regex.matches(in: text,options: [],range: NSMakeRange(0,nsString.length))
return results.map { nsString.substring(with: $0.range)}
} catch let error as NSError {
print("invalid regex: \(error.localizedDescription)")
return []
}}
用法保持不变.