picker组件 android机型 默认值中为空字符串 会显示0
item.DataNow = [" ", “1”, “2”];
<picker bindchange=“bindPickerChange” value="{{item.DataArray}}" data-index=’{{index}}’ range=’{{item.DataNow}}’>
</picker>
item.DataNow = [" ", “1”, “2”];
<picker bindchange=“bindPickerChange” value="{{item.DataArray}}" data-index=’{{index}}’ range=’{{item.DataNow}}’>
</picker>