iOS 上的 Firebase 远程配置 ArgumentOutOfRangeException

如何解决iOS 上的 Firebase 远程配置 ArgumentOutOfRangeException

在 iOS 上，Firebase 远程配置抛出 ArgumentOutOfRangeException：

Exception: ArgumentOutOfRangeException: Value to add was out of range.
  Parameter name: value
  System.DateTime.TimeToTicks (System.Int32 hour,System.Int32 minute,System.Int32 second) (at <00000000000000000000000000000000>:0)
  Rebar.GameData.RemoteConfigFetcher+<>c__DisplayClass20_0.<Refresh>b__1 () (at <00000000000000000000000000000000>:0)
  System.Threading.ContextCallback.Invoke (System.Object state) (at <00000000000000000000000000000000>:0)
  System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext,System.Threading.ContextCallback callback,System.Object state,System.Boolean preserveSyncCtx) (at <00000000000000000000000000000000>:0)
  System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner.Run () (at <00000000000000000000000000000000>:0)
  System.Action.Invoke () (at <00000000000000000000000000000000>:0)
  System.Threading.ContextCallback.Invoke (System.Object state) (at <00000000000000000000000000000000>:0)
  System.Threading.Tasks.AwaitTaskContinuation.RunCallback (System.Threading.ContextCallback callback,System.Threading.Tasks.Task& currentTask) (at <00000000000000000000000000000000>:0)
  System.Threading.Tasks.Task.FinishContinuations () (at <00000000000000000000000000000000>:0)
  System.Threading.Tasks.Task`1[TResult].TrySetResult (TResult result) (at <00000000000000000000000000000000>:0)
  System.Threading.Tasks.TaskCompletionSource`1[TResult].TrySetResult (TResult result) (at <00000000000000000000000000000000>:0)
  System.Threading.Tasks.TaskCompletionSource`1[TResult].SetResult (TResult result) (at <00000000000000000000000000000000>:0)
  Firebase.FutureVoid+<GetTask>c__AnonStorey0.<>m__0 () (at <00000000000000000000000000000000>:0)
  Firebase.FutureVoid+Action.Invoke () (at <00000000000000000000000000000000>:0)
  Firebase.FutureVoid.SWIG_CompletionDispatcher (System.Int32 key) (at <00000000000000000000000000000000>:0)
  Firebase.AppUtil.PollCallbacks () (at <00000000000000000000000000000000>:0)
  Firebase.Platform.FirebaseHandler.Update () (at <00000000000000000000000000000000>:0)
  Rebar.GameData.<>c__DisplayClass20_0:<Refresh>b__1()
  System.Threading.Tasks.TaskCompletionSource`1:SetResult(TResult)
  Firebase.<GetTask>c__AnonStorey0:<>m__0()
  Firebase.Action:Invoke()
  Firebase.FutureVoid:SWIG_CompletionDispatcher(Int32)
  Firebase.AppUtil:PollCallbacks()
  Firebase.Platform.FirebaseHandler:Update()

我不确定此错误可能来自何处或可能导致它的原因。前几天还在用。

我们在 Unity 2019.4.17f1 中运行 Firebase 7.2.0。问题似乎是 iOS 特有的。

相关代码段：

private async Task<Dictionary<string,object> FetchAndActivateAsync(){
  _fetchState = FetchState.Fetching;
  await _remoteConfig.FetchAsync(TimeSpan.Zero);
  _fetchState = FetchState.Applying;
  if(_remoteConfig.Info.LastFetchStatus == LastFetchStatus.Failure){
    _fetchState = FetchState.Fail;
    return null;
  }
  await _remoteConfig.ActivateAsync();
  var configs = new Dictionary<string,object>();
  foreach(string key in _remoteConfig.Keys){
    var configValue = _remoteConfig.GetValue(key);
    AddConfig(key,configValue,configs); //just does some sorting and translating
  }
  _fetchState = FetchState.Success;
  return configs;
}

解决方法

似乎是在请求没有受到限制时访问 RemoteConfig.ConfigInfo.ThrottledEndTime 的调试日志造成的。分解日志并首先检查 LastFetchFailureReason，似乎已解决问题。