正则表达式从URL字符串中提取Spotify艺术家ID

Question

我有以下网址字符串：

https://open.spotify.com/artist/7Ln80lUS6He07XvHI8qqHH?si=75tvlB1pQsW7xomeFfpGQA

我需要提取其中的7Ln80lUS6He07XvHI8qqHH部分。如何在Swift中使用正则表达式执行此操作？

Answer 1

您可以这样做：

let str = "https://open.spotify.com/artist/7Ln80lUS6He07XvHI8qqHH?si=75tvlB1pQsW7xomeFfpGQA"

guard let urlComponents = URLComponents(string: str),
    let artistID = urlComponents.path.split(separator: "/").last
    else {
    fatalError("Can't find the artist")
}

let artistIdString = String(artistID)  //"7Ln80lUS6He07XvHI8qqHH"

或更简洁地说：

guard let urlComponents = URLComponents(string: str) else {
    fatalError("Can't find the artist")
}

let artistID = (urlComponents.path as NSString).lastPathComponent  //"7Ln80lUS6He07XvHI8qqHH"

Answer 2

使用lastPathComponent中的URL获得所需的结果，即

let str = "https://open.spotify.com/artist/7Ln80lUS6He07XvHI8qqHH?si=75tvlB1pQsW7xomeFfpGQA"

if let url = URL(string: str) {
    print(url.lastPathComponent)
}

它将给出pathComponents的{​​{1}}数组的最后一个元素。