03.基础框架场景和资源加载模块

​​​https://docs.unity3d.com/ScriptReference/SceneManagement.SceneManager.LoadSceneAsync.html​​

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.SceneManagement;

public class SceneMgr : BaseManager<SceneMgr>
{

    private IEnumerator cEnumerator;
    public void LoadSceneAsync(string sceneName,UnityAction fun)
    {
        MonoMgr.GetInstance.StartCoroutine(LoadScene(sceneName, fun));
    }

    //  AsyncOperation的progress（0-1）属性在isDone为false时，
    // 最大加载到0.9就会暂停，直到isDone为true时才会继续加载0.9-1.0的这10%，
    // 而isDone为true或fasle的标志为是： 当allowSceneActivation = false，isDone为false ，
    // allowSceneActivation = false 的作用是让场景不会在加载完成后自动跳转到下一个场景，
    // 当allowSceneActivation = true，isDone才可以为true，直到progress = 1.0时 isDone = true

   // 1、AsyncOperation 在你不主动设置AllowSceneActivation = false的情况下，
   // isDown会随着progress的增长（从0增长到1）自动变成true，所以会自动跳转场景；

    //2、如果你不想让场景进行自动跳转，你就需要在异步加载时设置allowSceneActivation = false，
    //这会使场景不进行自动跳转，原因是isDown在allowSceneActivation = false 的情况下 永远不会为true，
    //并且此时的aysncOperation.progress也最多可以加载到0.9（90%），
    //当你允许你的场景跳转时（设置allowSceneActivation = true），
    //progress加载最后的10%，直到progress = 1， isDown此时自动变为true，异步加载完成，实现场景跳转。

    //private AsyncOperation operation = null;
    IEnumerator LoadScene(string sceneName, UnityAction fun)
    {
        AsyncOperation operation = SceneManager.LoadSceneAsync(sceneName);
        //阻止当加载完成自动切换
        operation.allowSceneActivation = false;
       while (!operation.isDone)
       {
            //Debug.Log(operation.progress*1.0f);
            if (operation.progress >= 0.9f)
            {
                operation.allowSceneActivation = true;
            }
            yield return operation.progress;
        }
        // Debug.Log(operation.progress); //0.9
        fun?.Invoke();
    }

}

//改进正确的

IEnumerator LoadScene(string sceneName)
    {
        yield return null;
        AsyncOperation operation = SceneManager.LoadSceneAsync(sceneName);
        //阻止当加载完成自动切换
       operation.allowSceneActivation = false;
       while (!operation.isDone)
        {
            Debug.Log(operation.progress*100);
            if (operation.progress >= 0.9f)
            {
                operation.allowSceneActivation = true;
            }
            yield return null;
        }
        Debug.Log(operation.progress+":完成");
    }

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;

public class ResMgr :BaseManager<ResMgr>
{

    public T Load<T>(string path) where T:Object
    {
       T t= Resources.Load<T>(path);
       if (t is GameObject)
       {
           return UnityEngine.Object.Instantiate(t);
       }
       else
       {
           return t;
       }
    }

    public void LoadAsync<T>(string path ,UnityAction<T> callBack ) where T:Object
    {
        MonoMgr.GetInstance.StartCoroutine(LoadRes<T>(path,callBack));
    }

    IEnumerator LoadRes<T>(string path, UnityAction<T> callBack) where T : Object
    {
        ResourceRequest request= Resources.LoadAsync<T>(path);
        yield return request;
        if (request.asset is GameObject)
        {
            callBack?.Invoke(Object.Instantiate(request.asset) as T);
        }
        else
        {
            callBack?.Invoke(request.asset as T);
        }
    }
}