unity3D中协程IEnumerator使用

旧城等待， 2022-04-05 14:42 356阅读 0赞

练习 ：物体本身是白色，当点击攻击按钮后，物体变红，1秒后变回原来的颜色

public class ChangeColor : MonoBehaviour
    {
        private Color oldColor;
        private MeshRenderer render;
        private void Start(){
            render = this.GetComponent<MeshRenderer>();
            oldColor = render.material.color;
        }
        private void Damage(){
            StartCoroutine("ChangeColorFunc");     //调用
          // StartCoroutine(ChangeColorFunc());  //函数参数调用
          // StopCoroutines();只能停止一字符串启动的协程
        }
        private IEnumerator ChangeColorFunc() {     //定义协程
            render.material.color = Color.red;
            yield return new WaitForSeconds(1);
            render.material.color = oldColor;
        }
        private void OnGUI()
        {
            if (GUILayout.Button("攻击"))
                Damage();
        }
    }

多个路点巡逻:每到一点等待一段时间再继续巡逻

/// <summary>
    /// 路点巡逻
    /// </summary>
    public class PathTest : MonoBehaviour{
        public Transform[] points;//路点
        public float speed = 5;
        private bool loop = true;
        private void OnGUI() {//找到一个路点等待2秒，并且可以循环巡逻
            if (GUILayout.Button("开始"))
                StartCoroutine(MoveToPath());
            else if (GUILayout.Button("停止"))
                StopAllCoroutines();//停止本对象中所有协程
        }
        private IEnumerator MoveToPath(){
            do
            {
                foreach (var point in points)
                {
                    //协程嵌套
                    //找到目标点后再找下一个点，等待MoveToTarget（）方法执行结束后再启用协程
                    yield return StartCoroutine(MoveToTarget(point.position));
                    yield return new WaitForSeconds(2);
                }
            } while (loop);
    
        }
        //找目标点，不是一次，而是分多次，所以此处适宜用协程
        private IEnumerator MoveToTarget(Vector3 target){
            while (transform.position != target){
                transform.position = Vector3.MoveTowards(transform.position, target,
                    speed * Time.deltaTime);
                yield return new WaitForFixedUpdate();
            }
            //yield return new WaitForSeconds(2);
        }
     
    }