UE4 OnHit()函数 AddDynamic报错解决
绑定语句：OnHit会出现问题
OnComponentHit.AddDynamic(this, &AFPSProjectile::OnHit);
然后onHit函数定义应该这样去写：
void OnHit( UPrimitiveComponent* HitComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, FVector NormalImpulse, const FHitResult& Hit);
下面是查找过程：
报错no instance of function template "FComponentHitSignature::__Internal_AddDynamic" matches the argument list，AddDynamic宏没有匹配上
这种情况一般需要查看对应宏的定义（如OnComponentHit），检查参数
查看发现OnComponentHit对应的宏定义为：
/**
* Delegate for notification of blocking collision against a specific component.
* NormalImpulse will be filled in for physics-simulating bodies, but will be zero for swept-component blocking collisions.
*/
DECLARE_DYNAMIC_MULTICAST_DELEGATE_FiveParams( FComponentHitSignature, UPrimitiveComponent*, HitComponent, AActor*, OtherActor, UPrimitiveComponent*, OtherComp, FVector, NormalImpulse, const FHitResult&, Hit );
发现这里缺失了第一个UPrimitiveComponent* HitComponent参数，修改对应OnHit函数为
void OnHit(UPrimitiveComponent* HitComponent, class AActor* OtherActor, class UPrimitiveComponent* OtherComp, FVector NormalImpulse, const FHitResult& Hit);
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