swift - 访问子类时不能在类型错误的实例上使用静态成员

Question

我 100% 确定这个问题已得到解答，但我发现的答案似乎无法融入我的解决方案。我有以下代码作为 Playground 。

import Foundation

public class AuthenticationInfo
{
public class RootObject
{
    var resultParameters: ResultParameters = ResultParameters()

}

public class ResultParameters
{
    var adminInfo: AdminInfo = AdminInfo()
    var ServerBuildNumber: Int = -1
    var ServerIs64Bit: Bool = false
    var ServerOSPlatform: Int = -1
    var ServerStartTime: Int64 = -1
    var ServerVersion: String = ""
    var EnableLiveDataUpdates: Bool = false
    var DelayLiveDataUpdates: String = ""
    var SessionTimeout: Int = 0;
    var ServerName: String = ""
    var ServerPort: Int = -1
    var UserName: String = ""
    var WebAPIVersion: String = ""
    var Locale: String = ""
}

public class AdminInfo
{
    var AdminUUID: String = ""
    var AllowChangeAgentClientInfoSettings: Int = -1
    var AllowChangeAgentCustomFieldSettings: Int = -1
    var AllowChangeAgentGeneralSettings: Int = -1
    var AllowChangeAgentServerSettings: Int = -1
    var AllowChangeComputerTracking: Int = -1
    var AllowChangeComputerTrackingScreenshot: Int = -1
    var AllowChangeCustomFields: Int = -1
    var AllowChangeHistoryOptions: Int = -1
    var AllowChangeMobileDeviceTracking: Int = -1
    var AllowEnterCustomFieldData: Int = -1
    var AllowManageDeviceUsers: Int = -1
    var AllowManageiOSDevices: Int = -1
    var AllowMobileRemoteControl: Int = -1
    var AllowModifyADEPAccount: Int = -1
    var AllowModifyBookstoreBooks: Int = -1
    var AllowModifyMDMDeviceEnrollmentProfiles: Int = -1
    var AllowModifyMobileActions: Int = -1
    var AllowModifyMobileMedia: Int = -1
    var AllowModifySDConfigProfiles: Int = -1
    var AllowModifySDGroups: Int = -1
    var AllowModifySDImages: Int = -1
    var AllowModifySDPackages: Int = -1
    var AllowModifySLPackages: Int = -1
    var AllowModifySamsungLicenses: Int = -1
    var AllowModifyStagingServers: Int = -1
    var AllowModifyVPPAccount: Int = -1
    var AllowModifyiOSApplications: Int = -1
    var AllowModifyiOSConfigurationProfiles: Int = -1
    var AllowModifyiOSPolicies: Int = -1
    var AllowRemoteControl: Int = -1
    var AllowRemoveCommandsFromHistory: Int = -1
    var AllowRemoveComputerRecords: Int = -1
    var AllowRemoveInventoryData: Int = -1
    var AllowRemoveLicenseReports: Int = -1
    var AllowRemoveSDLogEntry: Int = -1
    var AllowRemoveiOSDeviceRecords: Int = -1
    var AllowRemoveiOSHistoryCommands: Int = -1
    var AllowResetSDPackges: Int = -1
    var AllowRetrySDPackges: Int = -1
    var AllowVPPLicenseManagement: Int = -1
    var AllowViewAdminCenter: Int = -1
    var AllowViewCommandsWindow: Int = -1
    var AllowViewComputerTrackingData: Int = -1
    var AllowViewComputerTrackingScreenshot: Int = -1
    var AllowViewCustomFields: Int = -1
    var AllowViewMobileDeviceTrackingData: Int = -1
    var AllowViewSDCenter: Int = -1
    var AllowViewSLCenter: Int = -1
    var AllowViewServerStatus: Int = -1
    var CanChangeServerSettings: Int = -1
    var CanDeployAgents: Int = -1
    var CanLogin: Int = -1
    var CanSeeAllRecords: Int = -1
    var CommandPermissions: Int64 = -1
    var CommandPermissions2: Int = -1
    var IsADUser: Int = -1
    var IsSuperAdmin: Int = -1
    var id: Int = -1
    var CommandPermissionsLow32: Int64 = -1
    var CommandPermissionsHigh32: Int = -1
}

}

var lobj_AuthenticationInfo: AuthenticationInfo
var lobj_AuthenticationInfo_RootObject: AuthenticationInfo.RootObject

lobj_AuthenticationInfo = AuthenticationInfo()
lobj_AuthenticationInfo_RootObject = lobj_AuthenticationInfo.RootObject

在最后一行出现以下错误:

静态成员 RootObject 不能用于 AuthenticationInfo 类型的实例。

更多信息:这些类是由代码生成器基于 JSON 数据创建的，这些数据将从我调用的 Web API 返回。因此，我相信这些对象的结构需要保持完整，所以当我使用 EVRefelction 将数据加载到类中时，结构与数据完全匹配。

有人可以帮助我让它工作吗？

Answer 1

与 Java 不同，在 swift 中，所有内部类都是隐式的 static。例如:

public class Outer {
    public class Inner {

    }
}

当你想创建一个Inner类型的对象时，你不需要先创建一个Outer类型的对象。你可以这样做:

let x = Outer.Inner()

而且因为内部类是静态的，所以不能用外部类的实例访问它们:

let x = Outer()
let y = x.Inner //Wrong!

我认为您在这里要做的是使 RootObject 成为非静态的，以便可以从 AuthenticationInfo 的实例访问它。这不能直接完成。您应该在 AuthenticationInfo 类中创建一个 RootObject 的实例:

public class AuthenticationInfo {
    public class RootObject {
         //blah blah blah
    }
    // Other inner classes goes here
    var rootObj = RootObject()
}

现在您可以创建一个 AuthenticationInfo 的实例并访问存储在 Authentication Info 中的 rootObj:

var x = AuthenticationInfo()
var y = AuthenticationInfo.rootObj

从您的编码风格来看，我猜您是一名 Java 程序员。您显式地编写所有类型的变量。但在 swift 中，很少使用。