微信小程序Page中data数据操作和函数调用方法

//index.js
Page({
 data: {
  text: "This is page data.",
  sliderOffset: 0,
  sliderLeft: 0,
  state:{
     genre:[],
     genre_index: 0,
     model:[],
     model_index: 0,
     terminalStatus:'',
  }
 },
 onLoad: function(options) {
  // Do some initialize when page load.
 },
 onReady: function() {
  // Do something when page ready.
 },
 onShow: function() {
  // Do something when page show.
 },
 onHide: function() {
  // Do something when page hide.
 },
 onUnload: function() {
  // Do something when page close.
 },
 onPullDownRefresh: function() {
  // Do something when pull down.
 },
 onReachBottom: function() {
  // Do something when page reach bottom.
 },
 // Event handler.
 viewTap: function () {
  var p = this.position
  ball(p, 150)
  function ball(x, y) {
   console.log(x,y)
  }
 },
 customData: {
  hi: 'MINA'
 }
})

this.setData({
   'state.genre_index':1,
   text:'data value'
})

var gener_index=this.data.state.genre_index
var text=this.data.text

onReady: function () {
  this.drawBall()
 },