<!-- 使用wxs 手机号码中间四位显示为*号 -->
<wxs module="phone">
var toHide = function(array) {
  var mphone = array.substring(0, 3) + '****' + array.substring(7);
  return mphone;
}
module.exports.toHide = toHide;
</wxs>

<view>{{phone.toHide(item.phone)}}</view>