car/assets/script/game/buff_time_count.ts

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

@ccclass('buff_time_count')
export class buff_time_count extends Component {
    @property(Node) buff_time_bar:Node =null
    private mCallBack = null
    private time_count:number = 0
    private total:number = 0
    public startBuffTimeCount(call_back,time:number){
        this.total = time
        this.time_count = 0
        this.mCallBack = call_back
        this.buff_time_bar.getComponent(Sprite).fillRange  = 1
    }

    protected update(dt: number): void {
        if(this.mCallBack!=null){
            this.time_count+=dt
            this.buff_time_bar.getComponent(Sprite).fillRange = 1-this.time_count/this.total
            if(this.time_count>=this.total){
                this.mCallBack()
                this.mCallBack = null
            }
        }
    }

    public cancelTimeCount(){
        this.mCallBack = 0
        this.time_count = 0
        this.buff_time_bar.getComponent(Sprite).fillRange  = 1
    }
}