如何使用 IEnumerator(Unity, C#) 解决错误？

Question

我需要让我的角色墙运行，但IEnumerator 有代码问题

这是Unity 4.5.x，用 C# 编写的代码

using UnityEngine;
using System.Collections;

public class Moving : MonoBehaviour {

public float speed = 6.0F;
public float jumpSpeed = 8.0F; 
public float gravity = 20.0F;
public float runTime = 1.0f;
private Vector3 moveDirection = Vector3.zero;
private bool isWallL = false;
private bool isWallR = false;
private RaycastHit hitL;
private RaycastHit hitR;
private int jumpCount = 1;

IEnumerator afterRun() {
    yield return new WaitForSeconds (runTime);
    isWallL = false;
    isWallR = false;
    gravity = 20;
}
void Update() {
    CharacterController controller = GetComponent<CharacterController>();

    if (controller.isGrounded) {
        jumpCount = 0;
        moveDirection = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
        moveDirection = transform.TransformDirection(moveDirection);
        moveDirection *= speed;

        if (Input.GetButton("Jump"))
            moveDirection.y = jumpSpeed;
    }

    if (Input.GetKeyDown (KeyCode.Space) && !controller.isGrounded && jumpCount <= 1) {
        if (Physics.Raycast (transform.position, -transform.right, out hitL, 1)){
            if (hitL.transform.tag == "Wall"){
                isWallL = true;
                isWallR = false;
                jumpCount = 1;
                gravity = 0;
                StartCoroutine (afterRun);
            }
        }
        if (Physics.Raycast (transform.position, transform.right, out hitR, 1)){
            if (hitR.transform.tag == "Wall"){
                isWallL = false;
                isWallR = true;
                jumpCount = 1;
                gravity = 0;
                StartCoroutine (afterRun);
            }
        }
    }
    moveDirection.y -= gravity * Time.deltaTime;
    controller.Move(moveDirection * Time.deltaTime);
    }
}

预计没有错误，但我有两个：

错误 CS1502：UnityEngine.MonoBehaviour.StartCoroutine(System.Collections.IEnumerator)' 的最佳重载方法匹配有一些无效参数”和“错误 CS1503：参数 #1' 无法将方法组的表达式转换为 System.Collections 类型.IEnumerator'。

Answer 1

为什么不这样：

private IEnumerator coroutine;

然后设置它并调用它：

coroutine = afterRun();
StartCoroutine(coroutine);

Answer 2

afterRun 在您的代码中是一个函数，但您调用它时不带括号。所以：

StartCoroutine (afterRun());

例如：

namespace someNamespace
{ 
    public class SomeClass
    {
        IEnumerator afterRun()
        {
            yield return new WaitForSeconds(3);            
        }

        public void Test(IEnumerator enumerator)
        {
            while(enumerator.MoveNext())
            {
                //do some work
            }
        }

        public void YoureCode()
        {
            Test(afterRun());
        }
    }

    public class WaitForSeconds
    {
        public WaitForSeconds(int a)
        {            
        }
    }
}

有关详细信息，请参阅 enter link description here

Answer 3

按照 Unity coroutines 的文档，看来协程函数必须调用为 StartCoroutine ("afterRun");