unity3d怎么实现异步加载场景
using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using UnityEngine.SceneManagement;
/// <summary>
/// 挂载到camera上 异步加载
/// </summary>
public class ARLoadingScr : MonoBehaviour
{
/// <summary>
/// 滑动条提交回答
/// </summary>
public Slider processBar;
private AsyncOperation async;
private int nowProcess;
void Start()
{
StartCoroutine(loadScene());
}
/// <summary>
/// 加载完场景后就会跳转
/// </summary>
/// <returns></returns>
IEnumerator loadScene()
{
async = SceneManager.LoadSceneAsync("AR");
async.allowSceneActivation = false;
yield return async;
}
void Update()
{
if (async == null)
{
return;
}
int toProcess;
// async.progress 你正在读取的场景的进度值 0---0.9
// 如果当前的进度小于0.9，说明它还没有加载完成，就说明进度条还需要移动
// 如果，场景的数据加载完毕，async.progress 的值就会等于0.9
if (async.progress < 0.9f)
{
toProcess = (int)async.progress * 100;
}
else
{
toProcess = 100;
}
// 如果滑动条的当前进度，小于，当前加载场景的方法返回的进度
if (nowProcess < toProcess)
{
nowProcess++;
}
processBar.value = nowProcess / 100f;
// 设置为true的时候，如果场景数据加载完毕，就可以自动跳转场景
if (nowProcess == 100)
{
async.allowSceneActivation = true;
}
}
}
