需要三个场景,场景A,场景B,场景C;
场景A:一个按钮,点击加载场景B;
场景B:从A切换到C过度场景,加载进度条;
场景C:目标场景;
创建OnProgress.cs脚本:
using System.Collections;using System.Collections.Generic;using UnityEngine;using UnityEngine.SceneManagement;public class OnProgress : MonoBehaviour {public void OnBtnClick(){Debug.Log("clicked");Globe.nextSceneName = "MainScene";//目标场景名称SceneManager.LoadScene("Loading");//加载进度条场景}}
创建一个panel,在panel下创建一个button,将OnProgress脚本挂载到canvas,点击button,设置button属性,绑定脚本方法,点击加号,选择canvas中刚才绑定脚本中的方法OnBtnClick。至此,A场景完成。
创建B场景Loading:
Loading场景由两部分组成,加载进度百分比和进度条:
文本就不说了,说明下进度条的实现,进度条实际是一个Image,设置Image Type为filled,fill Method为horizonal,这里一定要添加source Image,否则下面的Image Type不会出来。
另外说下添加图片,普通的图片添加到assets中不能直接添加到Source Image中,需要对图片进行设置,如下图:
OK,再看进度条加载过程的实现:
创建AsyncLoadScene脚本:
using UnityEngine;using System.Collections;using UnityEngine.UI;using UnityEngine.SceneManagement;public class Globe{public static string nextSceneName;}public class AsyncLoadScene : MonoBehaviour{public Text loadingText;public Image progressBar;private int curProgressValue = 0;private AsyncOperation operation;// Use this for initializationvoid Start(){if (SceneManager.GetActiveScene().name == "Loading"){//启动协程 StartCoroutine(AsyncLoading());}}IEnumerator AsyncLoading(){operation = SceneManager.LoadSceneAsync(Globe.nextSceneName);//阻止当加载完成自动切换operation.allowSceneActivation = false;yield return operation;}// Update is called once per framevoid Update(){int progressValue = 100;if (curProgressValue < progressValue){curProgressValue++;}loadingText.text = curProgressValue + "%";//实时更新进度百分比的文本显示progressBar.fillAmount = curProgressValue / 100f;//实时更新滑动进度图片的fillAmount值if (curProgressValue == 100){operation.allowSceneActivation = true;//启用自动加载场景loadingText.text = "OK";//文本显示完成OK}}}
将脚本挂在到Loading场景的camera上面。设置对象:
这样进度条加载场景就完成了,C场景就不介绍了,就是你要跳转的目标场景。