如何在嵌套列中将行与底部对齐？

Question

Expected

使用Bootstrap 4在将两个较小的图像放置在一个较大的图像旁边时遇到麻烦。但是，我似乎无法将其中一个较小的图像与底部对齐以使其与较大的图像对齐。

网格和图像文本都应该响应。

感谢您的帮助。

<div class="container">
                        <div class="row">
                            <div class="col-md-6">
                                <img src="../assets/img/Iot.png" class="img-fluid">
                                <div class="carousel-caption text-justify" style="bottom: 0px;left: 10%;">
                                        <h1 style="color:white !important">IoT</h1>
                                        <p style="color:white !important">In the forefront of emerging technologies,
                                            Internet of Things (IoT) applications are some of the most challenging and
                                            innovative solutions to work with today... READ MORE</p>
                                    </div>
                            </div>
                            <div class="col-md-6">
                                <div class="row">
                                    <div class="col">
                                        <img src="../assets/img/fintech.png" class="img-fluid">
                                        <div class="carousel-caption text-justify" style="bottom: 0px;left: 10%;">
                                                <h1 style="color:white !important">FinTech</h1>
                                                <p style="color:white !important">The growth in digital banking is showing no
                                                    signs of slowing down. Convenience, speed and security aren’t just extra
                                                    benefits in consumers minds anymore... READ MORE</p>
                                            </div>
                                    </div>
                                </div>
                                <div class="row">
                                    <div class="col">
                                        <img src="../assets/img/smartapps.png" class="img-fluid">
                                        <div class="carousel-caption text-justify" style="bottom: 0px;left: 10%;">
                                                <h1 style="color:white !important">SmartApps</h1>
                                                <p style="color:white !important">With people using their smartphones more and
                                                    more, they are now
                                                    demanding solutions that can help them complete their task event on the go…
                                                    READ MORE</p>
                                            </div>
                                    </div>
                                </div>
                            </div>

                        </div>
                    </div>

Answer 1

为每个图像添加了height和width

.big img{
height: calc(500px + 1.5em);
}

.small img{
  height:250px;
  width:100%
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.6/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.2.1/js/bootstrap.min.js"></script>

<div class="container">
                        <div class="row">
                            <div class="col-md-6 big">
                                <img src="https://www.w3schools.com/w3css/img_lights.jpg" class="img-fluid">
                                <div class="carousel-caption text-justify" style="bottom: 0px;left: 10%;">
                                        <h1 style="color:white !important">IoT</h1>
                                        <p style="color:white !important">In the forefront of emerging technologies,
                                            Internet of Things (IoT) applications are some of the most challenging and
                                            innovative solutions to work with today... READ MORE</p>
                                    </div>
                            </div>
                            <div class="col-md-6">
                                <div class="row small">
                                    <div class="col">
                                        <img src="https://www.w3schools.com/w3css/img_lights.jpg" class="img-fluid">
                                        <div class="carousel-caption text-justify" style="bottom: 0px;left: 10%;">
                                                <h1 style="color:white !important">FinTech</h1>
                                                <p style="color:white !important">The growth in digital banking is showing no
                                                    signs of slowing down. Convenience, speed and security aren’t just extra
                                                    benefits in consumers minds anymore... READ MORE</p>
                                            </div>
                                    </div>
                                </div>
                                <div class="row mt-4 small">
                                    <div class="col">
                                        <img src="https://www.w3schools.com/w3css/img_lights.jpg" class="img-fluid">
                                        <div class="carousel-caption text-justify" style="bottom: 0px;left: 10%;">
                                                <h1 style="color:white !important">SmartApps</h1>
                                                <p style="color:white !important">With people using their smartphones more and
                                                    more, they are now
                                                    demanding solutions that can help them complete their task event on the go…
                                                    READ MORE</p>
                                            </div>
                                    </div>
                                </div>
                            </div>

                        </div>
                    </div>