小程序中自定义Element 使用报错

[JasonMiss]

import cax from './index'

export default class poker extends cax.Group {
constructor() {
super()
const bitmap = new cax.Bitmap('../../image/user_avatar_test.png')
bitmap.scaleX = bitmap.scaleY = 0.5
this.add(this.bitmap)
}
}

error:
Cannot set property 'parent' of undefined;at "pages/live/live" page lifeCycleMethod onLoad function
TypeError: Cannot set property 'parent' of undefined
at poker.add (http://127.0.0.1:35894/appservice/components/cax/index.js:298:35)
at new poker (http://127.0.0.1:35894/appservice/components/cax/poker.js:29:11)
at r.onLoad (http://127.0.0.1:35894/appservice/pages/live/live.js:67:17)
at r. (

[dntzhang]

@JasonMiss
你的代码写错了，居然把 undefined的东西add到group里。修改:

this.add(this.bitmap)

改成

 this.add(bitmap)