<view > <picker bindchange="bindPickerChange0" value="{{brandindex}}" range="{{brands}}">  <view class="picker">   品牌：{{brands[brandindex]}}  </view> </picker></view> <view > <picker bindchange="bindPickerChange1" value="{{index1}}" range="{{object}}">  <view class="picker">   配件類別：{{object[index1]}}  </view> </picker></view>

data: {  brands: [],  objectArray: [   {    brand:"博世",    id: 0,    array: ["博世噴油器配件", "博世傳感器", "杰克賽爾配件", "博世油泵配件", "博世共軌管配件","博世泵噴嘴"]   },   {    brand: "德爾福",    id: 1,    array: ["德爾福噴油器配件", "德爾福傳感器", "德爾福油泵", "德爾福共軌管配件", "德爾福濾清器", "德爾福電腦版ECU", "德爾福機油", "德爾福維修部件"]   },   {    brand: "卡特",    id: 2,    array: ["卡特傳感器", "卡特C7C9泵噴嘴","卡特共軌配件"]   },   {    brand: "康明斯",    id: 3,    array: ["西康配件", "東風康明斯","福田康明斯"]   }  ],  object:[],  brandindex:0,  index1:0 }, onLoad:function(){  var objectArray = this.data.objectArray  var brands=[]  for (var i = 0; i < objectArray.length;i++){   brands.push(objectArray[i].brand,)   }  this.setData({ brands: brands ,object: objectArray[this.data.brandindex].array}) }, bindPickerChange0: function (e) {  this.setData({ brandindex: e.detail.value, index1:0 })  var objectArray = this.data.objectArray  this.setData({ object: objectArray[this.data.brandindex].array}) }, bindPickerChange1: function (e) {  this.setData({   index1: e.detail.value  }) },