<view class=‘item’>

  <view>

    <button>按钮1</button>

  </view>

  <view>

    <button>按钮2</button>

  </view>

  <view>

    <button>按钮3</button>

  </view>

</view>

page{

  width: 100%;

  height: 100%;

  box-sizing: border-box;

}

.item{

  display: flex;

  height: 100%;

  align-items: flex-end;

  justify-content: space-between;

}

.item>view{

  width: 160rpx;

}