game_h5/Kungfu_sheep/assets/scripts/game/MapEnvirment.ts

const {ccclass, property} = cc._decorator;

@ccclass
export default class MapEnvirment extends cc.Component {

    // @property(cc.Sprite)
    // private bg: cc.Sprite = null;

    // @property(cc.Sprite)
    // private front: cc.Sprite = null;

    @property([cc.Node])
    private bgs: cc.Node[] = [];
    @property([cc.Node])
    private fronts: cc.Node[] = [];

    start () {
        this.changeMap(1);
    }

    changeMap(forceIdx:number=-1) {
        let me = this;
        let idx = Util.random(0, this.bgs.length - 1, true);
        if (forceIdx>=0) {
            idx = forceIdx;
        }
        // return;
        // me.bg.spriteFrame = this.bgs[idx];
        // me.front.spriteFrame = this.fronts[idx];

        // console.error("changeMap:" + idx);
        for (let i = 0; i < this.bgs.length; i++) {
            this.bgs[i].active = i == idx;
            // this.fronts[i].active = i == idx;
        }

    }
}