Unity Android打包IL2CPP错误：无法解析Input.get_touches()方法

问题描述 #

构建Android版本时持续触发IL2CPP错误，核心提示无法解析UnityEngine.Touch[] UnityEngine.Input::get_touches()方法引用，已尝试重装Unity及部分SDK，问题仍未解决。

解决方案 #

• 检查输入系统配置：如果使用Unity 2020及以上版本，前往Player Settings > Other Settings > Configuration，将Active Input Handling设置为Both或Old Input Manager，确保旧输入模块被启用。
• 替换废弃API：搜索项目中所有调用Input.touches的代码，若项目已迁移到新输入系统（Input System Package），替换为Touchscreen.current.touches；若保留旧系统，确认代码调用无误。
• 清理项目缓存：删除项目根目录下的Library、Temp文件夹，重启Unity后重新导入资源，再尝试构建。
• 排查插件冲突：临时移除第三方插件，逐个重新添加并构建，排查是否有插件错误引用该API或与Unity版本不兼容。
• 验证SDK/NDK配置：在Unity Preferences > External Tools中，确认Android SDK、NDK、JDK路径正确，且版本与当前Unity版本匹配（例如Unity 2022推荐NDK r25c）。

完整错误日志 #

Error: IL2CPP error (no further information about what managed code was being converted is available)
System.AggregateException: One or more errors occurred. (Found a method reference we cannot resolve to a method definition: UnityEngine.Touch[] UnityEngine.Input::get_touches())
 ---> System.InvalidOperationException: Found a method reference we cannot resolve to a method definition: UnityEngine.Touch[] UnityEngine.Input::get_touches()
    at Unity.IL2CPP.DataModel.BuildLogic.MethodReferenceResolver.ResolveMethodReference(TypeContext context, UnderConstructionMethodReferenceRepository repository, CecilSourcedAssemblyData assemblyData, MethodReference methodReference, Dictionary`2 mapping)
   at Unity.IL2CPP.DataModel.BuildLogic.MethodReferenceResolver.ResolveAssemblyMethodReferences(TypeContext context, UnderConstructionMethodReferenceRepository repository, CecilSourcedAssemblyData assemblyDef, ReadOnlyHashSet`1 methodReferences)
   at Unity.IL2CPP.DataModel.BuildLogic.DataModelBuilder.<>c__DisplayClass15_0.<ResolveReferences>b__0(CecilSourcedAssemblyData data)
   at System.Threading.Tasks.Parallel.<>c__DisplayClass33_0`2.<ForEachWorker>b__0(Int32 i)
   at System.Threading.Tasks.Parallel.<>c__DisplayClass19_0`1.<ForWorker>b__1(RangeWorker& currentWorker, Int32 timeout, Boolean& replicationDelegateYieldedBeforeCompletion)
--- End of stack trace from previous location ---
   at System.Threading.Tasks.Parallel.<>c__DisplayClass19_0`1.<ForWorker>b__1(RangeWorker& currentWorker, Int32 timeout, Boolean& replicationDelegateYieldedBeforeCompletion)
   at System.Threading.Tasks.TaskReplicator.Replica`1.ExecuteAction(Boolean& yieldedBeforeCompletion)
   at System.Threading.Tasks.TaskReplicator.Replica.Execute()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.TaskReplicator.Run[TState](ReplicatableUserAction`1 action, ParallelOptions options, Boolean stopOnFirstFailure)
   at System.Threading.Tasks.Parallel.ForWorker[TLocal](Int32 fromInclusive, Int32 toExclusive, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Func`4 bodyWithLocal, Func`1 localInit, Action`1 localFinally)
--- End of stack trace from previous location ---
   at System.Threading.Tasks.Parallel.ThrowSingleCancellationExceptionOrOtherException(ICollection exceptions, CancellationToken cancelToken, Exception otherException)
   at System.Threading.Tasks.Parallel.ForWorker[TLocal](Int32 fromInclusive, Int32 toExclusive, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Func`4 bodyWithLocal, Func`1 localInit, Action`1 localFinally)
   at System.Threading.Tasks.Parallel.ForEachWorker[TSource,TLocal](IList`1 list, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Action`3 bodyWithStateAndIndex, Func`4 bodyWithStateAndLocal, Func`5 bodyWithEverything, Func`1 localInit, Action`1 localFinally)
   at System.Threading.Tasks.Parallel.ForEachWorker[TSource,TLocal](IEnumerable`1 source, ParallelOptions parallelOptions, Action`1 body, Action`2 bodyWithState, Action`3 bodyWithStateAndIndex, Func`4 bodyWithStateAndLocal, Func`5 bodyWithEverything, Func`1 localInit, Action`1 localFinally)
   at System.Threading.Tasks.Parallel.ForEach[TSource](IEnumerable`1 source, Action`1 body)
   at Unity.IL2CPP.DataModel.BuildLogic.Utils.ParallelHelpers.ForEach[TSource](IEnumerable`1 source, Action`1 func, Boolean enableSerial)
   at Unity.IL2CPP.DataModel.BuildLogic.DataModelBuilder.Build()
   at Unity.IL2CPP.Contexts.Components.DataModelComponent.Load(LoadSettings loadSettings, Boolean ownsTypeContext, Boolean ownsBuilder, DataModelBuilder& builder)
   at Unity.IL2CPP.AssemblyConversion.Phases.InitializePhase.Run(AssemblyConversionContext context)
   at Unity.IL2CPP.AssemblyConversion.Classic.ClassicConverter.Run(AssemblyConversionContext context)
   at Unity.IL2CPP.AssemblyConversion.AssemblyConverter.ConvertAssemblies(AssemblyConversionInputData data, AssemblyConversionParameters parameters, AssemblyConversionInputDataForTopLevelAccess dataForTopLevel)

内容的提问来源于stack exchange，提问作者SDKPainIsSDKGain