小程序中页面布局和绝对定位以及按钮代码

  <view class="dibu">
  <input  value='{{inputval}}' bindinput='inputtyping' class="wz" bindinput='inputtyping' placeholder="请输入私信内容" placeholder-style='color:#bdbdbd;line-height:68rpx;margin-left:30rpx;font-size:30rpx;' />
  <view bindtap="blurfocus" class="fasong">发送</view>
  </view>

.dibu{
position:fixed;
bottom:2px;
float:left;
border:2px solid #f5f5f5;
width:99%;
height:70rpx;
background:white;
}

.wz{
    /* border:1px solid red; */
height:68rpx;
font-size:46rpx;
width:630rpx;
float:left;
border:1px solid #8ee5ee;
border-radius:10rpx;
}
.fasong{
    float:right;
height:70rpx;
margin-right:7rpx;
width:90rpx;
line-height:66rpx;
text-align:center;
border-radius:10rpx;
font-size:28rpx;
background:#8ee5ee;

}

<view class="viewh" wx:if="{{sharpicture==4}}">
    <view class="tp"><image class="tpimg" src="../../static/images/yqxg.png"/></view>
    <view class="imgtxt">你粗糙纹理好过<text style="font-size:60rpx;">{{facedata.defaultdata.wenli}}%</text>的人
    </view>
    <button class="share" style="border:0;" plain="true"  open-type="share">
   <image  src="../../static/images/share.png"/></button>
</view>

 onshareappmessage: function (ops) {
        console.log('分享了');

        if (ops.from === 'button') {
            // 来自页面内转发按钮
            console.log(ops.target)
        }
        return {
            title: '哈哈哈',
            path: '/pages/facialevaluate/facialevaluate?facefourdataid=' + this.data.facefourdataid +'&userid='+this.data.userid,
           //path:'',
            success: function (res) {
                // 转发成功
                console.log("转发成功:" + json.stringify(res));
            },
            fail: function (res) {
                // 转发失败
                console.log("转发失败:" + json.stringify(res));
            }
        }

    },