Question

您好，堆栈溢出用户！我正在统一2018.2.2f1中创建一个游戏。一切都很顺利，但是我在程序中错放了代码行的顺序->这导致了infite while循环的出现。我不知道它将是无限的，所以我运行了该程序。现在，当我单击图标时，我的统一窗口是不可选择的，当我进入窗口时，所有内容都被冻结。我将通过任务管理器关闭程序，但是我没有保存文件，甚至无法保存项目。在这种状态下，我有什么方法可以保存项目吗？我的团结并没有崩溃，只是僵住了。如果可以的话，这是我的固定C＃代码（我在Visual Studio中）：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Movement : MonoBehaviour {

    public float speed = 10f;
    private Vector3 velocity = new Vector3();
    private string direction = "none";
    private bool canMoveAgain = true;
    private bool go = false;
    // Use this for initialization
    void Start () {
        speed = 10f;
    }

    // Update is called once per frame
    private void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.collider.name == "wall (3)" && direction == "down")
        {
            go = false;
        }
        if (collision.collider.name == "wall (2)" && direction == "up")
        {
            go = false;
        }
        if (collision.collider.name == "wall" && direction == "left")
        {
            go = false;
        }
        if (collision.collider.name == "wall (1)" && direction == "right")
        {
            go = false;
        }
    }
    void Update () {
        if (Input.GetKeyDown(KeyCode.DownArrow) && canMoveAgain)
        {
            direction = "down";
            go = true;
            canMoveAgain = false;
            while (go)
            {
                velocity = new Vector3(0,-1,0);
                transform.position += velocity;
            }
            velocity = new Vector3(0, 0, 0);
            direction = "none";
        } else if (Input.GetKeyDown(KeyCode.UpArrow) && canMoveAgain)
        {
            direction = "up";
            go = true;
            canMoveAgain = false;
            while (go)
            {
                velocity = new Vector3(0, +1, 0);
                transform.position += velocity;
            }
            velocity = new Vector3(0, 0, 0);
            direction = "none";
        } else if (Input.GetKeyDown(KeyCode.LeftArrow) && canMoveAgain)
        {
            direction = "left";
            go = true;
            canMoveAgain = false;
            while (go)
            {
                velocity = new Vector3(-1, 0, 0);
                transform.position += velocity;
            }
            velocity = new Vector3(0, 0, 0);
            direction = "none";
        } else if (Input.GetKeyDown(KeyCode.RightArrow) && canMoveAgain)
        {
            direction = "right";
            go = true;
            canMoveAgain = false;
            while (go)
            {
                velocity = new Vector3(+1, 0, 0);
                transform.position += velocity;
            }
            velocity = new Vector3(0, 0, 0);
            direction = "none";
        }
    }
}

Answer 1

你做

while (go)
{
    velocity = new Vector3(+1, 0, 0);
    transform.position += velocity;
}

但是在循环内，go从未设置为false。

OnCollisionEnter从未执行，因为while仍在执行=>冻结。

由于Update被称为每一帧，因此您应该在检查输入..

之后将该部分移至单独的if(go)块中。

private void OnCollisionEnter2D(Collision2D collision)
{
    if (collision.collider.name == "wall (3)" && direction == "down"
        || collision.collider.name == "wall (2)" && direction == "up"
        || collision.collider.name == "wall" && direction == "left"
        || collision.collider.name == "wall (1)" && direction == "right")
    {
        go = false;
        velocity = Vector3.zero;
        direction = "none"
    }
}

void Update () 
{
    if (Input.GetKeyDown(KeyCode.DownArrow) && canMoveAgain)
    {
        direction = "down";
        go = true;
        canMoveAgain = false;
        velocity = -Vector3.up;
    } 
    else if (Input.GetKeyDown(KeyCode.UpArrow) && canMoveAgain)
    {
        direction = "up";
        go = true;
        canMoveAgain = false;
        velocity = Vector3.up;
    } 
    else if (Input.GetKeyDown(KeyCode.LeftArrow) && canMoveAgain)
    {
        direction = "left";
        go = true;
        canMoveAgain = false;

        velocity = -Vector3.right;
    } 
    else if (Input.GetKeyDown(KeyCode.RightArrow) && canMoveAgain)
    {
        direction = "right";
        go = true;
        canMoveAgain = false;
        velocity = Vector3.right;
    }

    if(go)
    {
        transform.position += velocity;
    }    
}

请注意，当前您的代码还取决于帧频。您可能想使用类似

的方法

public float moveSpeed;

...

transform.position += velocity * moveSpeed * Time.deltaTime;

对于direction，我宁愿推荐enum之类的

private enum MoveDirection
{
    None,
    Up,
    Down,
    Left,
    Right
}

并使用它，例如喜欢

direction = MoveDirection.Up;

和

if(direction == MoveDirection.Up)

比比较字符串更有效。

注意：在智能手机上键入内容，因此没有保修，但我希望这个主意会清楚

Answer 2

首先。不要关闭计算机。

您可以做一些事情。幸运的是，当您按下run时，您的代码已经有了备份。它在Temp文件夹中。如果再次按运行，将替换临时文件夹。将整个项目复制到安全的地方。

尝试查看Temp文件夹是否具有正确的备份。

您还有另一种选择。附加一个调试器，它可以是Visual Studio或MonoDevelop。将它们连接到Unity后，只需按Pause。而且您可以自由保存自己的东西。

希望您早日找到答案。

由于无限的while循环，Unity程序停止响应

2 个答案: