JumpGame/assets/Script/LoadScene.ts

// Learn TypeScript:
//  - https://docs.cocos.com/creator/2.4/manual/en/scripting/typescript.html
// Learn Attribute:
//  - https://docs.cocos.com/creator/2.4/manual/en/scripting/reference/attributes.html
// Learn life-cycle callbacks:
//  - https://docs.cocos.com/creator/2.4/manual/en/scripting/life-cycle-callbacks.html



const { ccclass, property } = cc._decorator;

@ccclass
export default class LoadScene extends cc.Component {


    //开始按钮
    @property(cc.Node)
    StartGameNode: cc.Node = null


    //开始按钮
    @property(cc.ProgressBar)
    progress: cc.ProgressBar = null

    progressNum: number = null

    @property(cc.Label)
    launchDesc: cc.Label = null

    start() {


        this.StartGameNode.active = false

        this.LoadBundle('sub').then((e) => {
            cc.director.preloadScene("Hall", (curcomplete, totalcount) => {
                this.progress.progress = (((curcomplete / totalcount) / 2) + 0.5)
                this.updatelaunchDesc()
            }, () => {
                this.StartGameNode.active = true
            })
        })
    }
    protected update(dt: number): void {
        if (this.progress.progress < 0.5) {
            this.progress.progress += 0.02
            this.updatelaunchDesc()
        }
    }

    updatelaunchDesc() {
        this.launchDesc.string = `${(this.progress.progress * 100).toFixed(0)}%`;
    }


    StartGame() {

        console.error('Hall');
        
        cc.director.loadScene("Hall")
    }


    LoadBundle(path: string): Promise<cc.AssetManager.Bundle> {
        return new Promise((resolve, reject) => {
            cc.assetManager.loadBundle(path, (err, bundle) => {
                if (err) {
                    console.log('加载Bundle失败')
                    reject(err)
                    return;
                }
                resolve(bundle)
            });
        })
    }

}