将 unity3d 移动更改为拖动时出错（c#）答案

【问题标题】：Errors while changing unity3d movement to drag (c#)将 unity3d 移动更改为拖动时出错（c#）
【发布时间】：2015-04-08 21:30:10
【问题描述】：

我的错误是

“UnityEngine.Collider2D”是一个“类型”，但用作“变量”
'UnityEngine.Vector3.Vector3(float, float, float)' 的最佳重载方法匹配有一些无效参数

参数 '1'：不能从 'double' 转换为 'float'

using UnityEngine;
using System.Collections; 

public class MoveRacket : MonoBehaviour {
    public float speed = 30;
    public string axis = "Vertical";
    public object racket = "Racket";
    public bool touchInput = true;
    public Vector2 touchPos;





    void FixedUpdate () {

        //used to not have anything in parentheses
        //float v = Input.GetAxisRaw (axis);
        float v = Input.GetAxisRaw (axis);
        GetComponent<Rigidbody2D> ().velocity = new Vector2 (0, v) * speed;
        if (Input.touchCount == 1)
        {
            Vector3 wp = Camera.main.ScreenToWorldPoint(Input.GetTouch(0).position);
            Vector2 touchPos = new Vector2(wp.x, wp.y);
            if (Touch = Physics2D.OverlapPoint(touchPos))
            {
                this.transform.position =  new Vector3 (3.94,wp.y,0);

        }
        }
    }
}

【问题讨论】：

标签： c# unity3d touch 2d drag

【解决方案1】：

这里有 2 个问题。第一个是您尝试将 Physics2D.OverlapPoint(touchPos) 的 Collider2D 结果分配给 Touch 的统一结构类型。不太确定你的意图是什么。如果你只是想测试touchPos是否重叠，那么使用这个代码：

public class MoveRacket : MonoBehaviour {
public float speed = 30;
public string axis = "Vertical";
public object racket = "Racket";
public bool touchInput = true;
public Vector2 touchPos;





void FixedUpdate () {

    //used to not have anything in parentheses
    //float v = Input.GetAxisRaw (axis);
    float v = Input.GetAxisRaw (axis);
    GetComponent<Rigidbody2D> ().velocity = new Vector2 (0, v) * speed;
    if (Input.touchCount == 1)
    {
        Vector3 wp = Camera.main.ScreenToWorldPoint(Input.GetTouch(0).position);
        Vector2 touchPos = new Vector2(wp.x, wp.y);
        if (Physics2D.OverlapPoint(touchPos) != null)
        {
            this.transform.position =  new Vector3 (3.94f,wp.y,0);

    }
    }
}
}

您的另一个问题是 3.94 的值被视为双精度数据类型，而 vector3 构造函数需要一个浮点数。要将其解释为浮点数，请在数字末尾添加“f”。

【讨论】：

抱歉，我之前忘记了。