swift - 如何搜索一系列字符串

Question

这个问题已经有答案了:

Extracting the RGB value from a string (2 个回答)

已关闭 5 年前。

如何搜索一系列字符串，我要搜索用户ID

但是这次的userID可能是“123”，下一次是“zxvcvb”，所以我不能使用 offsetBy

let userID = "12345"
let URL = "http://test/main/?Username=\(userID)#!/index.php"
let firstIndex = URL.index(of: "=")
let secondIndex = URL.index(of: "#")
let range = firstIndex...secondIndex //error

Answer 1

试试这个代码:

let userID = "jshjdschd"
let url = "http://test/main/?Username=\(userID)#!/index.php"

    guard let firstIndex = url.index(of: "="),
        let secondIndex = url[firstIndex...].index(of: "#") else{
            print("UserId not found")
    }

let range = url.index(after: firstIndex)..<secondIndex
let mySubstring = url[range]
print(mySubstring) //jshjdschd