unity实现场景切换进度条显示

/// <summary>/// 场景切换/// 在unity 获取当前加载进度progress中，其中最多到0.9.只有等到加载到第二个场景才会到1/// 所有在加载进度条时如果progress的值近似0.9，则直接将进度参数设置为1，实现进度到100%/// 并且progress的值是在一帧加载一些资源，所以其值不会是连续的，因此设置两个参数来记录当前/// 进度和页面显示的进度，进行++。/// </summary>public class loadScene : MonoBehaviour{ AsyncOperation async; public Slider slider; public Text text;//百分制显示进度加载情况 void Start() { //开启协程 StartCoroutine("loginMy"); }  void Update() {  } IEnumerator loginMy() { int displayProgress = 0; int toProgress = 0; AsyncOperation op = SceneManager.LoadSceneAsync(1); op.allowSceneActivation = false; while (op.progress < 0.9f) //此处如果是 <= 0.9f 则会出现死循环所以必须小0.9 {  toProgress = (int)op.progress * 100;  while (displayProgress < toProgress)  {  ++displayProgress;  SetLoadingPercentage(displayProgress);  yield return new WaitForEndOfFrame();//ui渲染完成之后  } } toProgress = 100; while (displayProgress < toProgress) {  ++displayProgress;  SetLoadingPercentage(displayProgress);  yield return new WaitForEndOfFrame(); } op.allowSceneActivation = true; } private void SetLoadingPercentage(int displayProgress) { slider.value = displayProgress; text.text = displayProgress.ToString() + "%"; }}