微信小程序自定义弹出层效果

<view class='popup' wx:if="{{popShow}}">
 <view class='mask' catchtouchmove="preventTouchMove" catchtap='closePop'>
 </view>
 <!-- 弹出层 -->
  <view class='popup_main' id='popup_main' >
 <!-- 关闭按钮 -->
  <view class='close_wrapper'>
   <image class='close_icon' src='/images/select_icons/close.png' mode='widthFix' bindtap='closePop'></image>
  </view>
 <!-- 主要内容 -->
  <view class='pop_list_wrapper'>这里加入你想加入的内容</view>
  </view>
</view>

.popup {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
 }
 .mask {
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.3);
 }
 .popup_main {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 85%;
  transform: translate(-50%, -50%);
  padding: 10px;
  box-sizing: border-box;
  background-color: #fff;
  border: 5px;
  border-radius: 10px;
 }
 .close_wrapper {
  width: 100%;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
 }
 .close_icon {
  width: 16px;
 }

data: {
/** 弹出层 **/
 popShow: false,
}

 /**
 * 弹出层
 */

 // 打开弹窗
 popupTap: function (e) {
 this.setData({
  popShow: true
 })
 },
 // 关闭弹窗
 closePop: function (e) {
 this.setData({
  popShow: false
 })
 },
 // 这个函数内容为空 用于阻止屏幕滚动
 preventTouchMove: function (e) {
 },