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using System;
using System.Collections;
using Mountools.Tools;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.SceneManagement;
namespace Mountools.LoadingScreen
{
[DisallowMultipleComponent]
#if MT_L_CHINESE
[AddComponentMenu("Mountools/加载画面/异步加载画面")]
#endif
#if MT_L_ENGLISH
[AddComponentMenu("Mountools/Loading Screen/Async Loading Screen")]
#endif
public class LoadingScreen : MonoBehaviour
{
public static LoadingScreen GetLoadingScreen()
{
return FindObjectOfType<LoadingScreen>();
}
public float loadingStartWaitSeconds = 2;
public float loadingDoneWaitSeconds = 2;
public float fakeLoadingRate = 0.1f;
private Coroutine _loadSceneCoroutine;
public float progress;
public bool isLoading;
public string loadingSceneName;
public UnityEvent<string> onLoad;
public UnityEvent<float> onLoading;
public UnityEvent onLoaded;
public static void LoadScene(int sceneIndex, LoadSceneMode mode = LoadSceneMode.Single, bool fakeLoad = false)
{
LoadScene(SceneManager.GetSceneAt(sceneIndex).name, mode, fakeLoad);
}
public static void LoadScene(string sceneName, LoadSceneMode mode = LoadSceneMode.Single, bool fakeLoad = false)
{
var loadingScreen = GetLoadingScreen();
if (loadingScreen == null)
{
Debug.LogWarning(
MountoolsLanguage.Lang(
"场景内没有加载画面！",
"There are no Loading Screen in the scene!"
));
SceneManager.LoadScene(sceneName, mode);
}
else
{
loadingScreen.Load(sceneName, mode, fakeLoad);
}
}
private void Load(string sceneName, LoadSceneMode mode = LoadSceneMode.Single, bool fakeLoad = false)
{
loadingSceneName = sceneName;
if (_loadSceneCoroutine == null)
{
_loadSceneCoroutine = StartCoroutine(LoadSceneAsync(sceneName, mode, fakeLoad));
}
else
{
Debug.LogWarning(
MountoolsLanguage.Lang("请勿重复加载场景！", "Do not load the scene repeatedly!")
);
}
}
private IEnumerator LoadSceneAsync(string sceneName, LoadSceneMode mode, bool fakeLoad)
{
// 设置状态，调用事件
isLoading = true;
onLoad.Invoke(sceneName);
// 等待动画播放
yield return new WaitForSecondsRealtime(loadingStartWaitSeconds);
// 开始加载
var loadAsync = SceneManager.LoadSceneAsync(sceneName, mode);
loadAsync.allowSceneActivation = false;
progress = 0;
if (fakeLoad)
{
// 假加载 (测试用)
while (progress < 0.9f)
{
progress += 0.1f;
onLoading.Invoke(progress);
yield return new WaitForSecondsRealtime(fakeLoadingRate);
}
}
else
{
// 真加载
while (progress < 0.86f)
{
progress = (float) Math.Round(Mathf.Lerp(progress, loadAsync.progress, 0.2f), 3);
onLoading.Invoke(progress);
yield return new WaitForEndOfFrame();
}
// 等待完全加载
while (loadAsync.progress < 0.9f)
{
yield return new WaitForEndOfFrame();
}
// 完全加载后，进入新场景
loadAsync.allowSceneActivation = true;
// 继续播放剩余 10% 的动画
while (progress < 0.99f)
{
progress = (float) Math.Round(Mathf.Lerp(progress, 1f, 0.2f), 3);
onLoading.Invoke(progress);
yield return new WaitForEndOfFrame();
}
}
// 进度条设置为 100%
progress = 1;
// 执行加载后事件
onLoaded.Invoke();
// 等待退出动画的播放
yield return new WaitForSecondsRealtime(loadingDoneWaitSeconds);
// 设置加载完成
isLoading = false;
}
private void Start()
{
DontDestroyOnLoad(gameObject);
onLoaded.AddListener(() =>
{
_loadSceneCoroutine = null;
});
}
}
}
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