cocos 获取一个骨骼动画多次显示播放

cc.Class({
    extends: cc.Component,

    properties: {
        donghuaNum: 10,         // 构建的个数
        ndDonghuaTemplate: cc.Node      // 所要加载的骨骼
    },

    // 本脚本需要添加到目标骨骼动画的父节点上
    onLoad () {
        var armatureDisplay = this.ndDonghuaTemplate.getComponent(dragonBones.ArmatureDisplay);  // 加载骨骼
        var animNameArr = armatureDisplay.getAnimationNames("armatureName");    // 获取骨骼动画的名称
        cc.log(animNameArr);
        for (var i = 0; i < this.donghuaNum; i++) {
            var ndDonghua = cc.instantiate(this.ndDonghuaTemplate);
            ndDonghua.position = this.getNewPos();
            ndDonghua.parent = this.node;
            var randIdx = parseInt(Math.random()*animNameArr.length);
            var animName = animNameArr[randIdx];
            cc.log(animName);
            ndDonghua.getComponent(dragonBones.ArmatureDisplay).playAnimation(animName, 1);

        }
    },

    getNewPos () { 
        var randY = -375 + Math.random() * 200;
        var randX = (Math.random() - 0.5) * 2 * 667;
        return cc.v2(randX, randY);
    },


});