本文共 1735 字，大约阅读时间需要 5 分钟。

OnCollision 为自定义的碰撞函数，名称可以任意，但参数形式必须满足以下条件

UFUNCTION()void OnCollision(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);

GetCapsuleComponent()->OnComponentBeginOverlap.AddDynamic(this, &PacManCharacter::OnCollision);

void PacManCharacter::OnCollision(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult){　　GEngine->AddOnScreenDebugMessage(0, 1.0f, FColor::Red, TEXT("PacMan ! "));}

但是以上是老版本的 UE4 支持的格式，编译会报参数类型不匹配的错误

error C2664: 'void TBaseDynamicMulticastDelegate::__Internal_AddDynamic(UserClass *,void (__cdecl AItem::* )(UPrimitiveComponent *,AActor *,UPrimitiveComponent *,int32,bool,const FHitResult &),FName)': cannot convert argument 2 from 'void (__cdecl AItem::* )(AActor *,UPrimitiveComponent *,int32,bool,const FHitResult &)' to 'void (__cdecl AItem::* )(UPrimitiveComponent *,AActor *,UPrimitiveComponent *,int32,bool,const FHitResult &)'

新版本的 UE4 应该对碰撞函数进行如下声明和定义：

UFUNCTION()void OnCollision(class UPrimitiveComponent* HitComp, class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult & SweepResult);

void PacManCharacter::OnCollision(class UPrimitiveComponent* HitComp, class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult){　　GEngine->AddOnScreenDebugMessage(0, 1.0f, FColor::Red, TEXT("PacMan ! "));}

即增加了第一个参数  class UPrimitiveComponent* HitComp

转载地址：https://panda1234lee.blog.csdn.net/article/details/60584606 如侵犯您的版权，请留言回复原文章的地址，我们会给您删除此文章，给您带来不便请您谅解！