微信小程序vant 输入框问题处理方案

// wxml代码
// catchtouchmove="true" 对遮罩的穿透处理
<view class="overlayInput" style='display:{{showInput ? "block" : "none"}}' catchtouchmove="true" bindtap="onCancel"></view>

// wxss代码
// 这边代码是之前百度网上一个哥们的代码，
.overlayInput {
  display: none;
  position: fixed;
  top: 0%;
  left: 0%;
  width: 100%;
  height: 100%;
  background-color: black;
  z-index: 2;
  -moz-opacity: 0.7;
  opacity: 0.70;
  filter: alpha(opacity=70);
}

<view class="comInput" style="bottom: {{isBlur ? blurBottom : bottom}}px" wx:if="{{showInput}}">
  <view class="top hairline">
    <view class="cancel" bindtap="onCancel">取消</view>
    <view class="title">发表观点</view>
    <view class="release" bindtap="onRelease">发布</view>
  </view>
  <view class="comtent">{{title}}</view>
  <view style="padding:0 10px 10px 10px;">
    <van-field
      value="{{ inputValue }}"
      placeholder="内容经过官方合规性审查通过后对所有人可见"
      border="{{ false }}"
      cursor-spacing="95"
      input-class="border"
      bind:change="onChange"
      autosize="{{autoSize}}"
      bind:keyboardheightchange="keyboardheightchange"
      maxlength="200"
      adjust-position="{{false}}"
      arrow-direction="left"
      fixed="{{true}}"
      type="textarea"
      bind:focus="onFoucs"
      bind:blur="onBlur"
      bind:linechange="onLineChange"
      show-word-limit
      auto-focus
      focus
      placeholder-class="place"
      input-class="com-input-class"
      show-confirm-bar="{{ false }}"
    />
  </view>
</view>

// 样式
.overlay {
  display: none;
  position: absolute;
  top: 0%;
  left: 0%;
  width: 100%;
  height: 100%;
  background-color: black;
  z-index: 2;
  -moz-opacity: 0.7;
  opacity: 0.70;
  filter: alpha(opacity=70);
}
.comInput {
  /* height: 200px; */
  position: fixed;
  width: 100%;
  background: #fff;
  z-index: 20;
  /* bottom: 0; */
  border-radius: 26rpx 26rpx 0 0;
}
.top {
  padding: 10px 16px;
  text-align: center;
}
.cancel {
  float: left;
  width: 50px;
  text-align: left;
}
.title {
  display: inline-block;
}
.release {
  float: right;
  width: 100rpx;
  height: 50rpx;
  background:rgba(255,194,64,1);
  border-radius: 25rpx;
  font-size: 30rpx;
}
.hairline {
  border-bottom: 1px solid #efefef;
}
.comtent {
  padding: 10px 16px;
}
.com-input-class {
  background: #efefef;
  border-radius: 3px;
  padding: 5px 5px 5px 5px;
}
.place {
  color:red;
}

// wxml代码
<view class="overlay" style='display:{{showInput ? "block" : "none"}}' catchtouchmove="true" bindtap="onCancel"></view>
<view class="comInput" style="bottom: {{isBlur ? blurBottom : bottom}}px" wx:if="{{showInput}}">
  <view class="top hairline">
    <view class="cancel" bindtap="onCancel">取消</view>
    <view class="title">发表观点</view>
    <view class="release" bindtap="onRelease">发布</view>
  </view>
  <view class="comtent">{{title}}</view>
  <view style="padding:0 10px 10px 10px;">
    <van-field
      value="{{ inputValue }}"
      placeholder="内容经过官方合规性审查通过后对所有人可见"
      border="{{ false }}"
      cursor-spacing="95"
      input-class="border"
      bind:change="onChange"
      autosize="{{autoSize}}"
      bind:keyboardheightchange="keyboardheightchange"
      maxlength="200"
      adjust-position="{{false}}"
      arrow-direction="left"
      fixed="{{true}}"
      type="textarea"
      bind:focus="onFoucs"
      bind:blur="onBlur"
      bind:linechange="onLineChange"
      show-word-limit
      auto-focus
      focus
      placeholder-class="place"
      input-class="com-input-class"
      show-confirm-bar="{{ false }}"
    />
  </view>
</view>

// js代码
Component({
  /**
   * 组件的属性列表
   */
  properties: {
    inputValue: String,
    title: String,
    showInput: {
      value: false,
      type: Boolean
    }
  },
  /**
   * 组件的初始数据
   */
  data: {
    autoSize: {
      maxHeight: 100,
      minHeight: 100
    },
    show: false,
    value: "",
    bottom: 0,
    isBlur: true,
    blurBottom: 0
  },
  /**
   * 组件的方法列表
   */
  methods: {
    keyboardheightchange (e) {
      // this.setData({
      //   bottom: e.detail.height
      // })
    },
    onFoucs (e) {
      this.setData({
        bottom: e.detail.height,
        isBlur: false
      })
    },
    onLineChange (e) {
    },
    onBlur (e) {
      this.setData({
        isBlur: true
      })
    },
    onShowInput () {
      this.setData({
        show: true
      })
    },
    onCancel () {
      console.log("点击了取消")
      this.setData({
        show: false
      })
      this.triggerEvent("close")
    },
    onRelease () {
      if (!this.data.inputValue.trim()) 
      return  wx.showToast({
          title: "请填写评论内容",
          icon: 'none',
          duration: 2000
        })
      this.triggerEvent("onOneComment", this.data.inputValue)
      this.onClose()
    },
    onChange (e) {
      this.data.inputValue = e.detail
      this.triggerEvent("onInput", e.detail)
    },
    onClose () {
      this.setData({
        show: false
      })
      this.triggerEvent("close")
    }
  }
})