由于buildsetting里面添加的场景会默认打进包里面，而我准备将场景打包成assetbundle，所以我将除了初始场景外的所有场景从里面删除。
然后打完包之后，加载方式是先加载assetbundle，然后SceneManager.LoadScene加载场景，这时候会报错，信息如下：
Scene 'start' couldn't be loaded because it has not been added to the build settings or the AssetBundle has not been loaded.
我要怎么弄才能在不把场景提前添加到build setting里面，之后还能用SceneManager.LoadScene加载场景？
然后打完包之后，加载方式是先加载assetbundle，然后SceneManager.LoadScene加载场景，这时候会报错，信息如下：
Scene 'start' couldn't be loaded because it has not been added to the build settings or the AssetBundle has not been loaded.
我要怎么弄才能在不把场景提前添加到build setting里面，之后还能用SceneManager.LoadScene加载场景？
