Unity—Loading界面-異步加載場景

Loading界面-異步加載場景

Demo展示

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加載新場景時，需要加載大量模型外部文件等，比較耗時，又不能讓畫面卡住不動；

很多時候會做一個加載界面顯示讀條；

這個加載條是個UI物體，可以自行添加替換UI素材；

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代碼

非常簡直，就不贅述了；

一個slider條，progress為異步百分比；

限制讀條3s結束，小於3s等待；

注意異步讀條progress到不了1，所以0.9判斷加載完成；

public class Loading : MonoBehaviour
{
    public string scenceName;
    
    AsyncOperation async;

    public Slider m_pProgress;

    private int progress = 0;

    private float time = 3f;
    private float startTime = 0;
    private void Start()
    {
        StartCoroutine(LoadScenes());
        startTime = Time.time;
    }

    IEnumerator LoadScenes()
    {
        int nDisPlayProgress = 0;
        async = SceneManager.LoadSceneAsync(scenceName);
        async.allowSceneActivation = false;
        while (async.progress < 0.9f)
        {
            progress = (int)async.progress * 100;
            while (nDisPlayProgress < progress)
            {
                ++nDisPlayProgress;
                m_pProgress.value = (float)nDisPlayProgress / 100;
                yield return new WaitForEndOfFrame();
            }
            
            yield return null;
        }

        progress = 100;
        while (nDisPlayProgress < progress)
        {
            ++nDisPlayProgress;
            m_pProgress.value = (float)nDisPlayProgress / 100;
            yield return new WaitForEndOfFrame();
        }
        
        float temp = Time.time - startTime;
        if (temp < time)
            yield return new WaitForSeconds(time - temp);
        
        async.allowSceneActivation = true;
    }
}

測試代碼：

加載場景時，記在loading界面，設置需要加載的場景名稱；

public class MainScence : MonoBehaviour
{
    public Button btnLoad;
    void Start()
    {
        btnLoad.onClick.AddListener(OnLoadFight);
    }

    private void OnLoadFight()
    {
        GameObject go = Instantiate(Resources.Load<GameObject>("Loading"), transform);
        go.GetComponent<Loading>().scenceName = "FightScence";
    }
}