練習 ：物體本身是白色，當點選攻擊按鈕後，物體變紅，1秒後變回原來的顏色

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");     //呼叫
      // StartCoroutine(ChangeColorFunc());  //函式引數呼叫
      // StopCoroutines();只能停止一字串啟動的協程
    }
    private IEnumerator ChangeColorFunc() {     //定義協程
        render.material.color = Color.red;
        yield return new WaitForSeconds(1);
        render.material.color = oldColor;
    }
    private void OnGUI()
    {
        if (GUILayout.Button("攻擊"))
            Damage();
    }
}
 

多個路點巡邏:每到一點等待一段時間再繼續巡邏

/// <summary>
/// 路點巡邏
/// </summary>
public class PathTest : MonoBehaviour{
    public Transform[] points;//路點
    public float speed = 5;
    private bool loop = true;
    private void OnGUI() {//找到一個路點等待2秒，並且可以迴圈巡邏
        if (GUILayout.Button("開始"))
            StartCoroutine(MoveToPath());
        else if (GUILayout.Button("停止"))
            StopAllCoroutines();//停止本物件中所有協程
    }
    private IEnumerator MoveToPath(){
        do
        {
            foreach (var point in points)
            {
                //協程巢狀
                //找到目標點後再找下一個點，等待MoveToTarget（）方法執行結束後再啟用協程
                yield return StartCoroutine(MoveToTarget(point.position));
                yield return new WaitForSeconds(2);
            }
        } while (loop);

    }
    //找目標點，不是一次，而是分多次，所以此處適宜用協程
    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);
    }
 
}