老师，请问图片布局问题谢谢，

来源：3-2 作业题

qq_慕移动3101913

2020-03-31 11:46:28

<!-- 图片展示区 -->
    <div class="img">
        <div class="img-container">
            <h3 class="img-container-title">主打课程</h3>
            
            <div class="img-container-item d-none d-md-block ">
                <div class="img-container-item-list col-md-4">
                    <img src="img/1.jpg" alt="cellphone" class="img-container-item-list-1">
                </div>
                <div class="img-container-item-list col-md-4">
                    <img src="img/2.jpg" alt="cellphone" class="img-container-item-list-1">
                </div>
                <div class="img-container-item-list col-md-4">
                    <img src="img/3.jpg" alt="cellphone" class="img-container-item-list-1">
                </div>
                <div class="img-container-item-list col-md-4">
                    <img src="img/4.jpg" alt="cellphone" class="img-container-item-list-1">
                </div>
                <div class="img-container-item-list col-md-4">
                    <img src="img/5.jpg" alt="cellphone" class="img-container-item-list-1">
                </div>
                <div class="img-container-item-list col-md-4">
                    <img src="img/6.jpg" alt="cellphone" class="img-container-item-list-1">
                </div>
            </div>

            <div class="img-container-item d-md-none ">
                <div class="img-container-item-list col-sm-6">
                    <img src="img/1.jpg" alt="cellphone" class="img-container-item-list-1">
                </div>
                <div class="img-container-item-list col-sm-6">
                    <img src="img/2.jpg" alt="cellphone" class="img-container-item-list-1">
                </div>
                <div class="img-container-item-list col-sm-6">
                    <img src="img/3.jpg" alt="cellphone" class="img-container-item-list-1">
                </div>
                <div class="img-container-item-list col-sm-6">
                    <img src="img/4.jpg" alt="cellphone" class="img-container-item-list-1">
                </div>
                <div class="img-container-item-list col-sm-6">
                    <img src="img/5.jpg" alt="cellphone" class="img-container-item-list-1">
                </div>
                <div class="img-container-item-list col-sm-6">
                    <img src="img/6.jpg" alt="cellphone" class="img-container-item-list-1">
                </div>
            </div>
        </div>
    </div>

在ipad下布局失效怎么处理这个问题。