如何在Swift中解析附加的XML并从中获取所有帐户信息

import Foundation

class AccountParser: NSObject, XMLParserDelegate {
    var currentElement = ""
    var accountInfo = ""
    var accountDict: [String: String] = [:]
    var allAccounts: [[String: String]] = []
    
    func parseXML(xmlData: Data) {
        let parser = XMLParser(data: xmlData)
        parser.delegate = self
        parser.parse()
    }
    
    func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String] = [:]) {
        currentElement = elementName
    }
    
    func parser(_ parser: XMLParser, foundCharacters string: String) {
        if currentElement == "account" {
            accountInfo += string
        }
    }
    
    func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
        if elementName == "account" {
            allAccounts.append(accountDict)
            accountDict = [:]
            accountInfo = ""
        } else if elementName == "username" || elementName == "password" {
            accountDict[elementName] = accountInfo
            accountInfo = ""
        }
    }
}

// Usage example:

// Assuming you have the XML data stored in `xmlData`
let accountParser = AccountParser()
accountParser.parseXML(xmlData: xmlData)

let allAccounts = accountParser.allAccounts
for account in allAccounts {
    if let username = account["username"], let password = account["password"] {
        print("Username: \(username)")
        print("Password: \(password)")
        print("---")
    }
}

<accounts>
    <account>
        <username>user1</username>
        <password>pass1</password>
    </account>
    <account>
        <username>user2</username>
        <password>pass2</password>
    </account>
    ...
</accounts>