等待协程完成，然后继续使用C#Unity函数 [英] Wait for a coroutine to finish before moving on with the function C# Unity

问题描述

我正在努力使单元在Unity2d中通过网格移动.我得到了顺利进行工作的动力. 我希望功能MovePlayer在协同程序完成之前等待，然后继续前进，因此程序将等到玩家完成移动之后再发出更多订单.

I was working on making a unit move through a grid in Unity2d. I got the movement to work without problems. I would want the function MovePlayer to wait until the coroutine is finished before moving on, so the program will wait until the player has finished the movement before issuing more orders.

这是我的代码: 公共类玩家:MonoBehaviour {

Here is my code: public class Player : MonoBehaviour {

public Vector3 position;
private Vector3 targetPosition;

private float speed;

void Awake ()
{
    speed = 2.0f;
    position = gameObject.transform.position;
    targetPosition = position;
    GameManager.instance.AddPlayerToList(this);                     //Register this player with our instance of GameManager by adding it to a list of Player objects. 
}

//Function that moves the player, takes a list of nodes as path
public void MovePlayer(List<Node> path)
{
    StartCoroutine(SmoothMovement(path));
    //Next step should wait until SmoothMovement is finished
}

private IEnumerator SmoothMovement(List<Node> path)
{
    float step = speed * Time.deltaTime;

    for (int i = 0; i < path.Count; i++)
    {
        targetPosition = new Vector3(path[i].coordinatesX, path[i].coordinatesY, 0f);

        float sqrRemainingDistance = (transform.position - targetPosition).sqrMagnitude;

        while (sqrRemainingDistance > float.Epsilon)
        {
            transform.position = Vector3.MoveTowards(transform.position, targetPosition, step);
            sqrRemainingDistance = (transform.position - targetPosition).sqrMagnitude;
            yield return null;
        }

        position = transform.position;
    }

}

推荐答案

您不能在主线程中等待函数中的协程，否则游戏将冻结直到函数结束.

You can not wait for a coroutine in a function in the main thread, otherwise your game will freeze until your function ends.

为什么不在协程结束时调用下一步?

Why don't you call your next step at the end of your coroutine?

private IEnumerator SmoothMovement(List<Node> path)
{
    float step = speed * Time.deltaTime;

    for (int i = 0; i < path.Count; i++)
    {
        targetPosition = new Vector3(path[i].coordinatesX, path[i].coordinatesY, 0f);

        float sqrRemainingDistance = (transform.position - targetPosition).sqrMagnitude;

        while (sqrRemainingDistance > float.Epsilon)
        {
            transform.position = Vector3.MoveTowards(transform.position, targetPosition, step);
            sqrRemainingDistance = (transform.position - targetPosition).sqrMagnitude;
            yield return null;
        }

        position = transform.position;
    }
    //Next Step
}

这篇关于等待协程完成，然后继续使用C#Unity函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！