英文:
error CS1736: Default parameter value for 'bulletSpeed' must be a compile-time constant
问题
以下是翻译好的内容：
我正在尝试使用Unity 2D创建一个游戏。以下代码抛出了一个错误：“error CS1736: 'bulletSpeed'的默认参数值必须是编译时常量”，而说实话，我无法弄清楚如何修复它。以下是有问题的代码：
private Rigidbody2D rb;
private MovementController checkForSlowMotion;
private float bulletSpeednew;
//private float bulletSpeed;
// Start is called before the first frame update
void Awake()
{
checkForSlowMotion = GameObject.Find("Player").GetComponent<MovementController>();
rb = GetComponent<Rigidbody2D>();
}
public void MoveBullet(float bulletSpeed = bulletSpeednew)
{
if (checkForSlowMotion.slowDown == true)
{
this.bulletSpeed = 1.0f;
}
else if (checkForSlowMotion.slowDown == false)
{
bulletSpeed = 10.0f;
}
rb.MovePosition(transform.position + transform.right * bulletSpeed * Time.deltaTime);
}
提前致谢。
我尝试将非静态变量“bulletspeednew”作为“bulletSpeed”传递，但未成功。
英文:
I am trying to create a game with Unity 2D. The following code throws an error "error CS1736: Default parameter value for 'bulletSpeed' must be a compile-time constant" which, quite frankly, I can't figure out how to fix.
Here's the guilty code:
private Rigidbody2D rb;
private MovementController checkForSlowMotion;
private float bulletSpeednew;
//private float bulletSpeed;
// Start is called before the first frame update
void Awake()
{
checkForSlowMotion = GameObject.Find("Player").GetComponent<MovementController>();
rb = GetComponent<Rigidbody2D>();
}
public void MoveBullet(float bulletSpeed = bulletSpeednew)
{
if (checkForSlowMotion.slowDown == true)
{
this.bulletSpeed = 1.0f;
}
else if (checkForSlowMotion.slowDown == false)
{
bulletSpeed = 10.0f;
}
rb.MovePosition(transform.position + transform.right * bulletSpeed * Time.deltaTime);
}
Thank you in advance.
I have tried passing a non-static variable "bulletspeednew" as "bulletSpeed", unsuccessfully.
答案1
得分: 1
如Ron在他的评论中提到的，C#不允许将非常量变量（即在运行时可以更改其值的变量，如Unity中的序列化字段）用作函数签名中的默认值，我认为在这里最好的选择是使用重载来设置“默认”值。
public void MoveBullet()
{
MoveBullet(bulletSpeednew);
}
public void MoveBullet(float bulletSpeed)
{
//...
}
英文:
As Ron mentioned in his comment, C# doesn't allow none-const variables (IE variables whose value can change during runtime, like serialized fields in Unity) to be used as default values in function signatures, I think your best bet here would be to set the "default" value with an overload.
public void MoveBullet()
{
MoveBullet (bulletSpeednew);
}
public void MoveBullet(float bulletSpeed)
{
//...
}
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