Swift，如何检查字符串中是否存在列表中的字符？

Question

I have a string string and I need to determine if one of the characters from the Correct List string is in it? How do I do this?

Maybe you need to change the Correct List type from String to List?

import SwiftUI

struct test: View {
    var string: String = ""
    var correctList: String = ""
    var body: some View {
        Text(string)
    }
}

---

struct test_Previews: PreviewProvider {
    static var previews: some View {
        test(string: "Qwerty1", correctList: "1234567890")
    }
}

Answer 1

You can check against an arbitrary set of characters

let characterSet = CharacterSet(charactersIn: "1234567890")
let isValid = string.rangeOfCharacter(from: characterSet) != nil

or with Regular Expression, the set of characters must be wrapped in square brackets.

let string = "Qwerty1"
let containsNumber = string.range(of: "[1234567890]", options: .regularExpression) != nil