Ios 如何使用NSXMLParser从SWIFT中的XML中获取特定属性

我需要从一个特定的

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在NRS下，然后将其解析为一个变量，稍后我将打印该变量，但我找不到任何方法在Swift中执行此操作。我有什么办法可以做到这一点吗？谢谢

我自己想出来的。下面是我为检索值所做的工作，以防有人遇到与我相同的问题

func parser(parser: NSXMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
    if elementName == "reading"{
        if attributeDict["type"] == "NPSI_PM25_3HR"{
            let PSIValue = attributeDict["value"]! as String
            print(i)
            switch i {
                case 0:
                    area = "NRS"
                    nationalPSI = PSIValue
                case 1:
                    area = "North"
                case 2:
                    area = "South"
                case 3:
                    area = "Central"
                case 4:
                    area = "West"
                case 5:
                    area = "East"
                default:
                    area = ""
            }
            i += 1
            print(area, ":", PSIValue)
        }

    }
}

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我自己想出来的。下面是我为检索值所做的工作，以防有人遇到与我相同的问题

func parser(parser: NSXMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
    if elementName == "reading"{
        if attributeDict["type"] == "NPSI_PM25_3HR"{
            let PSIValue = attributeDict["value"]! as String
            print(i)
            switch i {
                case 0:
                    area = "NRS"
                    nationalPSI = PSIValue
                case 1:
                    area = "North"
                case 2:
                    area = "South"
                case 3:
                    area = "Central"
                case 4:
                    area = "West"
                case 5:
                    area = "East"
                default:
                    area = ""
            }
            i += 1
            print(area, ":", PSIValue)
        }

    }
}