在 iOS Swift 中解析来自 url 的 xml

问：

    <?xml version="1.0" encoding="utf-8"?>
    <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
        <soap:Body>
            <CreditCheckMSResponse xmlns="https://ebs.gsm.co.za/">
                <CreditCheckMSResult>
                    <result message="Success" ref="505790" network="CellC" xmlns="" />
                </CreditCheckMSResult>
            </CreditCheckMSResponse>
        </soap:Body>
    </soap:Envelope>

这是我的尝试：

let parser = XMLParser(data: data)
 parser.delegate = self
 if parser.parse() {
     print(self.results ?? "No results")
 }

 let recordKey = "result"
    let dictionaryKeys = Set<String>(["message", "ref", "network", "xmlns"])

    // a few variables to hold the results as we parse the XML

    var results: [[String: String]]?         // the whole array of dictionaries
    var currentDictionary: [String: String]? // the current dictionary
    var currentValue: String?                // the current value for one of the keys in the dictionary
    


    extension ViewController: XMLParserDelegate {
    
        // initialize results structure
    
        func parserDidStartDocument(_ parser: XMLParser) {
            results = []
        }
    
        // start element
        //
        // - If we're starting a "record" create the dictionary that will hold the results
        // - If we're starting one of our dictionary keys, initialize `currentValue` (otherwise leave `nil`)
    
        func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
            if elementName == recordKey {
                currentDictionary = [String : String]()
            } else if dictionaryKeys.contains(elementName) {
                currentValue = String()
            }
        }
    
        // found characters
        //
        // - If this is an element we care about, append those characters.
        // - If `currentValue` still `nil`, then do nothing.
    
        func parser(_ parser: XMLParser, foundCharacters string: String) {
            currentValue? += string
        }
    
        // end element
        //
        // - If we're at the end of the whole dictionary, then save that dictionary in our array
        // - If we're at the end of an element that belongs in the dictionary, then save that value in the dictionary
    
        func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
    
            if elementName == recordKey {
                results!.append(currentDictionary!)
                currentDictionary = nil
            } else if dictionaryKeys.contains(elementName) {
                currentDictionary![elementName] = currentValue
                currentValue = nil
            }
        }
    
        // Just in case, if there's an error, report it. (We don't want to fly blind here.)
    
        func parser(_ parser: XMLParser, parseErrorOccurred parseError: Error) {
            print(parseError)
    
            currentValue = nil
            currentDictionary = nil
            results = nil
        }
    
    }

任何帮助将不胜感激！

提前谢谢你！