Swift:如何将数据添加到对象列表中对象的变量中

Question

我从需要存储的 xml 中获取了 3 层数据

1:开始时间和结束时间

2:主机的IP和MAC地址

3:各主机IP的端口号和服务

我用来解决这个问题的方法是创建 3 个类，并让每个类都有数据变量，如下所示:

class Ports {
var scanPortNumber: [String] = [""]
var scanProtocol: [String] = [""]
}

class Hosts {
    var hostPorts = [Ports]()
    var scanHostIP: [String] = [""]
    var scanHostMacAddr: [String] = [""]
}

class Scan {
    var scanHosts = [Hosts]()
    var scanStartTime: [String] = [""]
    var scanEndTime: [String] = [""]
}

然后我声明了一个全局对象，我在其中解析 xml，如下所示:

var scanDetails = Scan()

这样我就可以像这样存储从 xml 获得的 IP:

scanDetails.scanHosts[i].scanHostIP[i] = "the IP I get from parsing the xml"

这是我尝试存储数据的方式:

var scanDetails = Scan()

class XMLRead: NSObject, XMLParserDelegate {
    var hostIP = ""
    var hostMacAddr = ""
    
    func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String] = [:]) {
        
        var i = 0
        
        if !elementName.isEmpty {
            
            switch elementName {
                
                case "address":
                    print("i in address = \(i)")
                    let addrType = attributeDict["addrtype"]
                    if addrType == "ipv4" {
                        let hostIPtmp = attributeDict["addr"]
                        if hostIPtmp != hostIP || hostIP == "" {
                            hostIP = hostIPtmp!
                            scanDetails.scanHosts[i].scanHostIP[i] = hostIP
                        }
                    }
                    else if addrType == "mac" {
                        let hostMacAddrtmp = attributeDict["addr"]
                        if hostMacAddrtmp != hostMacAddr || hostMacAddr == "" {
                            hostMacAddr = hostMacAddrtmp!
                            scanDetails.scanHosts[i].scanHostMacAddr[i] = hostMacAddr
                        }
                    }
                    print("hostIP = \(scanDetails.scanHosts[i].scanHostIP[i])")
                    print("hostMacAddr = \(scanDetails.scanHosts[i].scanHostMacAddr[i])")
                
                default:    break
            }
            
            i += 1
            print("i = \(i)")
        }
    }

    func parser(_ parser: XMLParser, parseErrorOccurred parseError: Error) {
        print("failure error: \(parseError)")
    }
} 

但是这个方法似乎不起作用，因为当我这样做时它给了我**索引超出范围错误**。所以我尝试使用 append() 方法，但它说我必须附加一个 Hosts 类型，并且不允许我附加从 xml 获取的值，因为它是一个字符串。

我对 swift 还很陌生，所以如果有人能告诉我我做错了什么以及如何解决它，我将不胜感激。

Answer 1

只需运行您提供的代码: 我将进行以下更改:

.
.
var i = 0
var host: Hosts?
.
.
if hostIPtmp != hostIP || hostIP == "" {

   hostIP = hostIPtmp!
   host = Hosts()
   host!.scanHostIP.append(hostIP)
                        
   scanDetails.scanHosts.append(host!)
}
.
.
.
if hostMacAddrtmp != hostMacAddr || hostMacAddr == "" {
   hostMacAddr = hostMacAddrtmp!

   if host == nil {
      host = Hosts()
   }
   host!.scanHostMacAddr.append(hostMacAddr)
   scanDetails.scanHosts.append(host!)
}
.
.

但我不明白，如果您只想在每个类中放入一个值，为什么要使用“i”和类的变量作为数组。