Bootstrap 4 将网格布局重新排序为2列

我有以下用于移动设备的div布局：

当我达到中等断点时，我希望实现以下布局：

---

如何实现这一点？

唯一的方法是使用

d-md-block

和float实用程序在md上禁用flex

<div class="container">
    <div class="row d-md-block">
        <div class="col-md-4 float-right">
            <img src="https://dummyimage.com/400x100/000/fff&text=1" alt="1" class="w-100" />
        </div>
        <div class="col-md-8 float-left">
            <img src="https://dummyimage.com/400x800/111/fff&text=2" alt="2" class="w-100" />
        </div>
        <div class="col-md-4 float-right">
            <img src="https://dummyimage.com/400x100/222/fff&text=3" alt="3" class="w-100" />
        </div>
        <div class="col-md-4 float-right">
            <img src="https://dummyimage.com/400x100/333/fff&text=4" alt="4" class="w-100" />
        </div>
        <div class="col-md-4 float-right">
            <img src="https://dummyimage.com/400x300/444/fff&text=5" alt="5" class="w-100" />
        </div>
        <div class="col-md-4 float-right">
            <img src="https://dummyimage.com/400x100/555/fff&text=6" alt="6" class="w-100" />
        </div>
        <div class="col-md-4 float-right">
            <img src="https://dummyimage.com/400x200/666/fff&text=7" alt="7" class="w-100" />
        </div>
        <div class="col-md-8 float-left">
            <img src="https://dummyimage.com/400x800/777/fff&text=8" alt="8" class="w-100" />
        </div>
    </div>
</div>

---

谢谢@Zim，我就快到了，我稍微改变了布局，但现在我得到了8和7的顶部对齐。我想有8个直下2-看-所有部分将有动态生成的内容，他们将在高度不同耶，这是行不通的。浮动非常特定于高度/宽度。不必担心，我将按照动态内容的原样进行设置，看看如何最好地安排浮动

<div class="container">
    <div class="row d-md-block">
        <div class="col-md-4 float-right">
            <img src="https://dummyimage.com/400x100/000/fff&text=1" alt="1" class="w-100" />
        </div>
        <div class="col-md-8 float-left">
            <img src="https://dummyimage.com/400x800/111/fff&text=2" alt="2" class="w-100" />
        </div>
        <div class="col-md-4 float-right">
            <img src="https://dummyimage.com/400x100/222/fff&text=3" alt="3" class="w-100" />
        </div>
        <div class="col-md-4 float-right">
            <img src="https://dummyimage.com/400x100/333/fff&text=4" alt="4" class="w-100" />
        </div>
        <div class="col-md-4 float-right">
            <img src="https://dummyimage.com/400x300/444/fff&text=5" alt="5" class="w-100" />
        </div>
        <div class="col-md-4 float-right">
            <img src="https://dummyimage.com/400x100/555/fff&text=6" alt="6" class="w-100" />
        </div>
        <div class="col-md-4 float-right">
            <img src="https://dummyimage.com/400x200/666/fff&text=7" alt="7" class="w-100" />
        </div>
        <div class="col-md-8 float-left">
            <img src="https://dummyimage.com/400x800/777/fff&text=8" alt="8" class="w-100" />
        </div>
    </div>
</div>