暂停协程执行,直到提供的委托评估为 /false/。
在协程中,WaitWhile 只能与 yield
语句结合使用。
每帧都会执行提供的委托,在脚本 MonoBehaviour.Update 之后 MonoBehaviour.LateUpdate 之前执行。当委托最终评估为 false
时,协程将继续其执行。
using UnityEngine; using System.Collections;
public class WaitWhileExample : MonoBehaviour { public int frame;
void Start() { StartCoroutine(Example()); }
IEnumerator Example() { Debug.Log("Waiting for prince/princess to rescue me..."); yield return new WaitWhile(() => frame < 10); Debug.Log("Finally I have been rescued!"); }
void Update() { if (frame <= 10) { Debug.Log("Frame: " + frame); frame++; } } }
另请参阅:AsyncOperation、WaitForEndOfFrame、WaitForFixedUpdate、WaitForSeconds、WaitForSecondsRealtime、WaitUntil。
WaitWhile | 使用要评估的给定委托实例化一个 yield 指令。 |
keepWaiting | 指示协同程序是否应保持暂停。 |
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