car/assets/script/game/hp_bar.ts

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

@ccclass('hp_bar')
export class hp_bar extends Component {
    @property(Node) point:Node = null
    @property(Node) hp_bar:Node = null
    private total:number = 100
    public init(){

    }

    public updateHp(hp:number){
        let range = (hp/this.total)
        this.hp_bar.getComponent(Sprite).fillRange = range
        let heigth = this.hp_bar.getComponent(UITransform).contentSize.height
        this.point.position = new Vec3(this.point.position.x,heigth*(range>1?1:range))
    }
}