微信小程序开发之picker

data: {  
        Data: [‘A‘,‘B‘], 
        Index: 0,
    }
    
<picker class="picker" bindchange="bindChange" value="{{Index}}"  range="{{Data}}">
    <view >
      当前选择：{{Data[Index]}}
    </view>
</picker>

data: {  
        Data: [{id:0,value:‘a‘,name:‘A‘ },{id:1,value:‘b‘,name:‘B‘ }], 
        Index: 0,
　　　　  currentId
    }
    
<picker class="picker" bindchange="bindChange" value="{{Index}}"  range="{{Data}}" range-key="name">
    <view >
      当前选择：{{Data[Index].name}}
    </view>
</picker>

bindChange: function (event) { 
    this.setData({
      Index:event.detail.value;

    }); 
}