carrot/assets/Script/LoginScene.ts

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

@ccclass('NewComponent')
export class NewComponent extends Component {
    @property(Node)
    bird:Node=null;
    start() {
        let btnLogin = this.node.getChildByName("Button")
        btnLogin.on(Button.EventType.CLICK,this.onBtnLogin,this)
        this.birdAnimation();
    }

    birdAnimation(){
        let x = this.bird.getPosition().x;
        let y = this.bird.getPosition().y;

        tween(this.bird)
            .repeatForever(
                tween()
                    .to(1,{position : new Vec3(x,y - 10)},{easing : 'sineInOut'})
                    .to(1,{position : new Vec3(x,y + 10)},{easing : 'sineInOut'})
            )
            .start();
    }

    onBtnLogin(){
        director.loadScene("SelectScene");
    }
    
    update(deltaTime: number) {
        let x = this.bird.getPosition().x;
        let y = this.bird.getPosition().y;
        this.bird.setPosition(x,y)
    }
}