修正悬空（Unity2D）

Question

我正在做我的第一场比赛，现在我遇到一个问题：当我按下它时，我有一个跳跃按钮，我在跳跃，但是当我在空中时，我可以再次按下它并再次在空中跳跃。如何解决该问题，所以我只能跳到地面上。这是我的代码：

using UnityEngine;
using System.Collections;
using UnityStandardAssets.CrossPlatformInput;
public class Move2D : MonoBehaviour
{

    public float speed = 5f;
    public float jumpSpeed = 8f;
    private float movement = 0f;
    private Rigidbody2D rigidBody;

    // Use this for initialization
    void Start()
    {
        rigidBody = GetComponent<Rigidbody2D>();


    }

    public void Jump()
    {

        rigidBody.AddForce(transform.up * jumpSpeed, ForceMode2D.Impulse);
    }

    // Update is called once per frame

}

Answer 1

这里是代码

public class Move2D : MonoBehaviour
{
    public bool isGrounded = false;
    public float speed = 5f;
    public float jumpSpeed = 8f;
    private float movement = 0f;
    private Rigidbody2D rigidBody;

    // Use this for initialization
    void Start()
    {
        rigidBody = GetComponent<Rigidbody2D>();


    }

    private void OnCollisionEnter2D(Collision2D other)
    {
        if (other.gameObject.tag == "Ground") //you need to add a tag to your Ground, like "Ground"
        {
            isGrounded = true;
        }
    }
    public void Jump()
    {

        rigidBody.AddForce(transform.up * jumpSpeed, ForceMode2D.Impulse);
        isGrounded = false;
    }
     void Update()
    {
        if (Input.GetButtonDown("Jump") && isGrounded == true)
        {
            isGrounded = false;
            Jump();
        }
    }
}

Answer 2

首先，您需要一个布尔值（isGrounded）。然后，您必须使用

检查播放器与地面之间的碰撞

private void OnCollisionEnter2D(Collision2D other)
{
    if(other.gameObject.tag == "Ground") //you need to add a tag to your Ground, like "Ground"
    {
       isGrounded = true;
    }
}

然后在Update方法中添加以下代码：

if (Input.GetKeyDown(KeyCode.Space) && isGrounded == true)
    {
        isGrounded = false;
        Jump();
    }