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1.在MyPawn.h中添加弹簧臂组件声明：

public:

UPROPERTY(VisibleAnywhere,Category="My Pawn Components")

class USpringArmComponent* MySpringArm;

2.在MyPawn.cpp中包含头文件：

#include "GameFramework/SpringArmComponent.h"

3.在MyPawn.cpp中添加：

MySpringArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("MySpringArm"));

MySpringArm ->SetupAttachment(MyStaticMesh);

MySpringArm ->RelativeRotation = FRotator(-45.0f,0.0f,0.0f);

MySpringArm ->TargetArmLength=400.f;

MySpringArm ->bEnableCameraLag=true;

MySpringArm ->CameraLagSpeed=3.0f;

4.注释掉摄像机设置位置和旋转的代码

5.将摄像机附着到弹簧臂组件上：

MyCamera->SetupAttachment(MySpringArm);