Unity3D 使用游戏对象。您将组件添加到这些游戏对象,其中组件是继承基类的脚本(在 c# 或 js 中)。Unity 本身是用本机代码编写的。组件不能有构造函数,而是使用反射来查找是否有某些命名方法(OnStart、Update 等)。
我认为我可以做以下事情,而不是因为缺乏构造函数和其他真正烦人的事情而让我的眼睛流血:
public class SomeGameBehaviour
{
public SomeGameBehaviour(IGameObject gameObject) { }
}
(单一行为是基类)
public class ComponentWrapper : MonoBehaviour, IGameObject { }
..然后我可以从 SomeGameBehaviour 中获取 gameObject.Transform 或你有什么,同时将它与 Unity 强制延迟解耦。
问题:我不能使用默认的注入行为,因为组件/MonoBehaviours 没有也不能有构造函数——如果你尝试它会向你抛出错误,所以我推出了我自己的 Provider。
public class UnityProvider : IProvider
{
public object Create(IContext context)
{
var go = new GameObject(context.Request.Target.Name, typeof(ComponentWrapper));
var c = go.GetComponent<ComponentWrapper>();
return c;
}
public Type Type { get; private set; }
}
我可以在 Unity 编辑器中看到创建了游戏对象,并且附加了 ComponentWrapper,但是 Ninject 向我抛出了一个我无法弄清楚的空引用错误。它似乎正在对 IGameObject 或 Target 做进一步的事情,这会扰乱这个过程。
NullReferenceException: Object reference not set to an instance of an object
Ninject.Infrastructure.Language.ExtensionsForMemberInfo.GetParentDefinition (System.Reflection.MethodInfo method, BindingFlags flags)
Ninject.Infrastructure.Language.ExtensionsForMemberInfo.GetParentDefinition (System.Reflection.PropertyInfo property)
Ninject.Infrastructure.Language.ExtensionsForMemberInfo.IsDefined (System.Reflection.PropertyInfo element, System.Type attributeType, Boolean inherit)
Ninject.Infrastructure.Language.ExtensionsForMemberInfo.HasAttribute (System.Reflection.MemberInfo member, System.Type type)
Ninject.Selection.Heuristics.StandardInjectionHeuristic.ShouldInject (System.Reflection.MemberInfo member)
Ninject.Selection.Selector+<>c__DisplayClass3.<SelectPropertiesForInjection>b__2 (IInjectionHeuristic h)
System.Linq.Enumerable.Any[IInjectionHeuristic] (IEnumerable`1 source, System.Func`2 predicate)
Ninject.Selection.Selector.<SelectPropertiesForInjection>b__1 (System.Reflection.PropertyInfo p)
System.Linq.Enumerable+<CreateWhereIterator>c__Iterator1D`1[System.Reflection.PropertyInfo].MoveNext ()
System.Collections.Generic.List`1[System.Reflection.PropertyInfo].AddEnumerable (IEnumerable`1 enumerable)
System.Collections.Generic.List`1[System.Reflection.PropertyInfo].AddRange (IEnumerable`1 collection)
Ninject.Selection.Selector.SelectPropertiesForInjection (System.Type type)
Ninject.Planning.Strategies.PropertyReflectionStrategy.Execute (IPlan plan)
Ninject.Planning.Planner+<>c__DisplayClass2.<GetPlan>b__0 (IPlanningStrategy s)
Ninject.Infrastructure.Language.ExtensionsForIEnumerableOfT.Map[IPlanningStrategy] (IEnumerable`1 series, System.Action`1 action)
Ninject.Planning.Planner.GetPlan (System.Type type)
Ninject.Activation.Context.Resolve ()
Ninject.KernelBase.<Resolve>b__4 (IContext context)
System.Linq.Enumerable+<CreateSelectIterator>c__Iterator10`2[Ninject.Activation.IContext,System.Object].MoveNext ()
System.Linq.Enumerable.Single[Object] (IEnumerable`1 source, System.Func`2 predicate, Fallback fallback)
System.Linq.Enumerable.SingleOrDefault[Object] (IEnumerable`1 source)
Ninject.Planning.Targets.Target`1[T].GetValue (System.Type service, IContext parent)
Ninject.Planning.Targets.Target`1[T].ResolveWithin (IContext parent)
Ninject.Activation.Providers.StandardProvider.GetValue (IContext context, ITarget target)
Ninject.Activation.Providers.StandardProvider+<>c__DisplayClass2.<Create>b__1 (ITarget target)
System.Linq.Enumerable+<CreateSelectIterator>c__Iterator10`2[Ninject.Planning.Targets.ITarget,System.Object].MoveNext ()
System.Collections.Generic.List`1[System.Object].AddEnumerable (IEnumerable`1 enumerable)
System.Collections.Generic.List`1[System.Object]..ctor (IEnumerable`1 collection)
System.Linq.Enumerable.ToArray[Object] (IEnumerable`1 source)
Ninject.Activation.Providers.StandardProvider.Create (IContext context)
Ninject.Activation.Context.Resolve ()
Ninject.KernelBase.<Resolve>b__4 (IContext context)
System.Linq.Enumerable+<CreateSelectIterator>c__Iterator10`2[Ninject.Activation.IContext,System.Object].MoveNext ()
System.Linq.Enumerable+<CreateCastIterator>c__Iterator0`1[SomeGameBehaviour].MoveNext ()
System.Linq.Enumerable.Single[SomeGameBehaviour] (IEnumerable`1 source, System.Func`2 predicate, Fallback fallback)
System.Linq.Enumerable.Single[SomeGameBehaviour] (IEnumerable`1 source)
Ninject.ResolutionExtensions.Get[SomeGameBehaviour] (IResolutionRoot root, Ninject.Parameters.IParameter[] parameters)
ObjectFactory.GetInstance[SomeGameBehaviour] () (at Assets/Scripts/Core/ObjectFactory.cs:31)
Grid.Start () (at Assets/Scripts/World/Grid.cs:27)