NSRegularExpression无法正确评估

Question

我有以下密码的正则表达式，可以在Password.123的在线正则表达式测试中正确评估：

/(?!^[0-9]*$)(?!^[a-z]*$)(?!^[A-Z]*$)(?!^[\\W]*$)(^[a-zA-Z0-9\\W]).{7,}/

当我在swift中创建NSRegularExpression时，它的计算结果不正确，无法找到Password.123的匹配项：

let password = "Password.123"

let regex = try! NSRegularExpression(pattern: "/(?!^[0-9]*$)(?!^[a-z]*$)(?!^[A-Z]*$)(?!^[\\W]*$)(^[a-zA-Z0-9\\W]).{7,}/", options: [])

let range = NSRange(location: 0, length: password.count)
print("Valid: \(regex.firstMatch(in: password, options: [], range: range) != nil)")

这打印错误但应该是真的。我哪里错了？

Answer 1

从字符串中删除/。即。

let regex = try! NSRegularExpression(pattern: "(?!^[0-9]*$)(?!^[a-z]*$)(?!^[A-Z]*$)(?!^[\\W]*$)(^[a-zA-Z0-‌​9\\W]).{7,}", options: [])