lachang-wxapp/ThorUI/components/tui-fab/tui-fab.wxml

<view catchtouchmove="stop">
  <view class="tui-fab-box {{!left || (left && right)?'tui-fab-right':''}}" style="left:{{parse.getLeft(left,right)}};right:{{parse.getRight(left,right)}};bottom:{{bottom}}rpx">
    <view class="tui-fab-btn {{isOpen?'tui-visible':''}} {{hidden?'tui-fab-hidden':''}}">
      <view class="tui-fab-item-box {{left && !right && item.imgUrl?'tui-fab-item-left':''}}" wx:for="{{btnList}}" wx:key="{{index}}" catchtap="handleClick" data-index="{{index}}">
        <view class="{{left && !right?'tui-text-left':'tui-text-right'}}" wx:if="{{item.imgUrl}}" style="font-size:{{item.fontSize}}rpx;color:{{item.color}}">{{item.text || ""}}</view>
        <view class="tui-fab-item" style="width:{{width}}rpx;height:{{height}}rpx;background :{{item.bgColor || bgColor}};border-radius:{{radius}}">
          <view class="tui-fab-title" wx:if="{{!item.imgUrl}}" style="font-size:{{item.fontSize}}rpx;color:{{item.color}}">{{item.text || ""}}</view>
          <image src="{{item.imgUrl}}" class="tui-fab-img" wx:else style="width:{{item.imgWidth}}rpx;height:{{item.imgHeight}}rpx"></image>
        </view>
      </view>
    </view>
    <view class="tui-fab-item {{isOpen?'tui-active':''}}" style="width:{{width}}rpx;height:{{height}}rpx;border-radius:{{radius}};background:{{bgColor}};color:{{color}}" catchtap="handleClick" data-index="-1">
				<view class="tui-fab-icon tui-icon-plus"></view>
			</view>
		</view>
		<view class="tui-fab-mask {{isOpen? 'tui-visible': ''}} " bindtap="handleClickCancel"></view>
	</view>

 <wxs module="parse">
  module.exports = {
    getLeft: function(left,right) {
      var val = "auto "
      if (left && !right) {
        val =left + 'rpx'
      }
      return val
    },
    getRight:function(left,right){
      var val = right + 'rpx'
      if (left && !right) {
        val = "auto "
      }
      return val
    }
  }
</wxs>