Swift 3字符串包含确切的句子/单词

解决方案是能够检查单词边界的正则表达式。

这是一个简单的String扩展，该模式搜索包装在单词边界（

b

extension String {    func contains(word : String) -> Bool    {        do { let regex = try NSRegularexpression(pattern: "\b(word)\b") return regex.numberOfMatches(in: self, range: NSRange(word.startIndex..., in: word)) > 0        } catch { return false        }    }}

或者–感谢Sulthan –更简单

extension String {    func contains(word : String) -> Bool    {        return self.range(of: "\b(word)\b", options: .regularexpression) != nil    }}

用法：

let string = "I know your name"string.contains(word:"your") // truestring.contains(word:"you") // false