求“方法 4：实施 CharacterMovementComponent 能力”怎么写的？

创建你的CharacterMovementComponent的子类YourCharacterMovementComponent
在YourCharacter.cpp中
#include "YourCharacterMovementComponent.h"
AYourCharacter::AYourCharacter(const FObjectInitializer& ObjectInitializer)
        : Super(ObjectInitializer.SetDefaultSubobjectClass<UYourCharacterMovementComponent>(ACharacter::CharacterMovementComponentName))
{

}

使用时：Cast<UYourCharacterMovementComponent>(GetMovementComponent());