String识别是否包含中文

var str = "6736这是中文1234"
func isIncludeChineseIn(string: String) -> Bool {
    for (_, value) in string.enumerated() {
        print(value)
        if ("\u{4E00}" <= value  && value <= "\u{9FA5}") {
            return true
        }
    }
    return false
}