微信小程序实现简单弹框效果

<!-- 遮罩层 -->
<view>
    <view class="mask" bindtap="close" wx:if="{{ showModal }}"></view>
    <view class="modal" wx:if="{{ showModal }}">
      <view class="dialog">
        <view class="dialog-head">
          <h3>发送短信</h3>
        </view>
      </view>
      <view class="section section_gap">
          <radio-group class="radio-group" bindchange="radiochange">
              <radio class="radio" wx:for-items="{{items}}" wx:key="name" value="{{item.name}}" checked="{{item.checked}}">
                <text>{{item.value}}</text>
              </radio>
          </radio-group>
      </view>
      <view>
        <textarea class="textarea w100" placeholder="短信内容" maxlength="-1" v-model="params.bz"></textarea>
      </view>
      <view class="btnFlex">
        <view>
          <button class="btn" bindtap="close">取消</button>
        </view>
        <view>
          <button class="btn" bindtap="Go">发送</button>
        </view>
      </view>
    </view>
</view>

 .btn{
  color: #fff;
  font-size: 31rpx;
  background-color: #f95137;
  margin: 11rpx 20rpx 0rpx;
  border-radius: 45rpx;
  width: 215rpx;
  height: 81rpx;
  line-height: 81rpx;
  
  }
.btnFlex{
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 50rpx;
}
.dialog-head{
  font-size: 33rpx;
  color: #172238;
  font-weight: bold;
  display: flex;
  align-items: center;
  padding: 20rpx;  
  border-bottom: 1rpx solid #e1e5e9;
}
 

.textarea {
  width: 92%;
  height: 246rpx;
  margin: 20rpx 30rpx;
  margin-top: 20rpx;
  padding: 20rpx;
  border-radius: 6rpx;
  border: solid 1rpx #e7eaf0;
  background-color: #f4f6f9;
}
.radio {
  width: 33%
}
.section_gap {
  margin: 20rpx 30rpx;
}

Page({
 
  
  data: {
    showModal: false,
    items: [
      { name: 'USA', value: '刘禅' },
      { name: 'CHN', value: '刘备', checked: 'true' },
      { name: 'BRA', value: '诸葛亮' },
      { name: 'JPN', value: '关羽' },
      { name: 'ENG', value: '赵云' },
      { name: 'FRA', value: '张子龙' },
    ]
  },
//给自定义button或者自定义view添加一个点击事件跳转，这里的html就不给出来了
  signinTap: function(e) {
    this.setData({
      showModal: true,
    })
  //具体调用接口省略***
  },
 // 发送
  go() {
    this.setData({
      showModal: false
    })
  //具体调用接口省略***
  },
  //取消
  close() {
    this.setData({
      showModal: false
    })
    // this.showModal = false;
   },