将GoogleMobileAds导入Unity时出错

Question

我导入了GoogleMobileAds，它报告了2个错误，这使我的项目无法运行。 2个错误是：-资产/ GoogleMobileAds /编辑器/ManifestProcessor.cs（9,19）：错误CS0234：类型或名称空间名称Build 'does not exist in the namespace `UnityEditor'. Are you missing an assembly reference? - Assets / GoogleMobileAds / Editor / ManifestProcessor.cs (20,34): error CS0246: The type or namespace name Build 'does not exist in the namespace `UnityEditor'. Are you missing an assembly reference? - Assets / GoogleMobileAds / Editor / ManifestProcessor.cs (20,34): error CS0246: The type or namespace name Build 'does not exist in the namespace `UnityEditor'. Are you missing an assembly reference? - Assets / GoogleMobileAds / Editor / ManifestProcessor.cs (20,34): error CS0246: The type or namespace name IPreprocessBuild'。 您是否缺少装配参考？ 我尝试安装其他一些统一版本（因为我使用旧版本编写了该项目），但仍然无法解决。

using System.IO;
using System.Linq;
using System.Xml.Linq;

using UnityEditor;
using UnityEditor.Build; -->Error
#if UNITY_2018_1_OR_NEWER
using UnityEditor.Build.Reporting;
#endif
using UnityEngine;

using GoogleMobileAds.Editor;

#if UNITY_2018_1_OR_NEWER
public class ManifestProcessor : IPreprocessBuildWithReport
#else
public class ManifestProcessor : IPreprocessBuild -->Error
#endif

这是我的项目目录