JSB加载armature动画资源同步加载问题。

Cocos2d-x
#1 
ctor:function () {
        // 1. super init first
        this._super();
        ccs.armatureDataManager.addArmatureFileInfo("bear/bear.ExportJson");
        var armature = ccs.Armature.create("bear");
        this.addChild(armature);
        return true;
    }


```



代码如上，报错：Uncaught TypeError: Cannot read property 'content_scale' of undefined 


是不能用同步加载吗？
#2

#3 
ctor:function () {
        // 1. super init first
        this._super();
        ccs.armatureDataManager.addArmatureFileInfo("bear/bear.ExportJson");
        var armature = ccs.Armature.create("bear");
        this.addChild(armature);
        return true;
    }

```