微信小程序自定义单项选择器样式

<view bindchange="radioChange">
 
 <view class='list_item' wx:for="{{radioValues}}" data-index="{{index}}" bindtap='radioChange' style="{{index == radioValues.length-1?'border-bottom:0':''}}">
  <text style='color:rgb(96,96,96)'>{{item.value}}</text> 
  <view wx:if="{{item.selected}}" class='item'> 
   <view style='width:20rpx;height:20rpx;background-color:rgb(144,144,144);border-radius:100%;'></view> 
  </view>
  <view wx:else class='item'></view>
 </view>
 
</view>

.list_item{
 
 display: flex;
 
 justify-content: space-between;
 align-items: center; 
 margin:0 25rpx; 
 width:700rpx;
 font-size: 30rpx; 
 color: rgb(79,79,79); 
 padding: 28rpx 0;
 border-bottom:1px solid rgb(209,209,209);
 
}
 
.item{
 
 width: 28rpx; 
 height: 28rpx; 
 border: 2px solid rgb(144,144,144); 
 border-radius: 100%; 
 display: flex; 
 align-items: center; 
 justify-content: center;
 
}

Page({
 
 
 data: {
 
  radioValues: [
 
   { 'value': '未付款订单', 'selected': false }, 
   { 'value': '进行中的订单', 'selected': false }, 
   { 'value': '完成了的订单', 'selected': false }, 
   { 'value': '所有订单', 'selected': true },
 
  ]
 
 },
 
 onLoad: function (options) { 
 },
 
 
 radioChange:function(e){ 
  var index = e.currentTarget.dataset.index;
  var arr = this.data.radioValues;
   for (var v in arr){
   if (v == index){
 
    arr[v].selected = true;
 
   }else{
 
    arr[v].selected = false;
 
   }
 
  }
 
  this.setData({ 
   radioValues:arr
 
  })
 
 }
 
 
})