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Hello everyone Faced with such a problem after upgrading to Unity3D 202310.b18:
error CS0121: The call is ambiguous between the following methods or properties: 'Cysharp.Threading.Tasks.UnityAsyncExtensions.GetAwaiter(UnityEngine.AsyncOperation)' and 'UnityEngine.AsyncOperationAwaitableExtensions.GetAwaiter(UnityEngine.AsyncOperation)'
My code:
await UnityEngine.SceneManagement.SceneManager.LoadSceneAsync(ID);
``
I solved this problem in this way if anyone needs:
AsyncOperation loadSceneHandler = UnityEngine.SceneManagement.SceneManager.LoadSceneAsync(ID);
await loadSceneHandler.ToUniTask();
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Replies: 2 comments 5 replies
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Warning
From the UniTask Readme:
In UniTask, await directly uses native timing, while WithCancellation and ToUniTask use specified timing. This is usually not a particular problem, but with LoadSceneAsync, it causes a different order of Start and continuation after await. So it is recommended not to use LoadSceneAsync.ToUniTask.
At first I used this and it seemed to work fine in editor and standalone windows builds. But when I tested in a UWP build (IL2CPP), the await loadSceneHandler.ToUniTask(); hold the whole app and all I got was a black screen.
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UnityAsyncExtensions.GetAwaiter is disabled in UNITY_2023_1_OR_NEWER.
UniTask/src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.cs
Lines 18 to 25 in 0c8057c
Why is it enabled?
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I don't know...
I'm using Unity 2023年1月16日f1 and have the name conflict.
It seems UNITY_2023_1_OR_NEWER is false in my project (so the code is included), this is very strange.
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My issue is with Visual Studio.
The define are not properly set, so Visual Studio underline await SceneManager.UnloadSceneAsync("my_scene_name"); in red with error CS0121, but it's ok in Unity.
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How about regenerating csproj?
Delete the sln and csproj and have Unity regenerate them.
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Already done, and it doesn't fix preprocessor directives in Visual Studio.
I think it's because of some incompatibility of my Visual Studio version and the Unity Visual Studio package version, but I can't change easily them becuse my company computer doesn't have an access to the internet.
It's not a big issue for me, now I understood it's broken only in Visual Studio.
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I know I'm late to the conversation but in case it happens to someone else:
You need to set using UnityEngine; in the class you are setting your await or else it will try to get the AsyncOperation from LoadSceneAsync instead of the Awaitable version from Unity
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