carrot/assets/Script/Start.ts

import { _decorator, Component, Node, Vec3, tween } from 'cc';
const { ccclass, property } = _decorator;

@ccclass('Start')
export class Start extends Component {
    @property(Node)
    bar:Node=null;
    @property(Node)
    logoPic:Node=null;
    start() {
        //this.bar.setScale(2,1);
        this.Loading();
        this.Logo();
    }
    Logo(){
        
    }
    Loading(){
        tween(this.bar)
            .call(()=>{this.bar.setScale(0,1)})
            .to(2,{scale:new Vec3(2,1)})
            .call(()=>{this.bar.setScale(1.5,1)})
            .start();
    }
    update(deltaTime: number) {
    }
}