Material Design Lite卡片未正确对齐

Question

我正在尝试建立一个MDL网站。我遇到了一些问题......添加了一些卡片后，他们不会水平对齐另一张卡片，而是另一张卡片旁边垂直对齐，在屏幕右侧留下一个大的白色空间将保持没有任何内容。在这里为您提供更多信息代码：

<div class="mdl-layout mdl-js-layout mdl-layout--fixed-header">

            <header class="mdl-layout__header">

                <div class="mdl-layout__header-row">

                    <!-- Title -->

                    <span class="mdl-layout-title">C. Piersigilli &#38 Associati </span>

                    <!-- Add spacer, to align navigation to the right -->

                    <div class="mdl-layout-spacer"></div>

                </div>

            </header>

            <div class="mdl-layout__drawer">

                <span class="mdl-layout-title"> Navigation </span>

                <nav class="mdl-navigation">

                    <a class="mdl-navigation__link" href=""> WebMail </a>
                    <a class="mdl-navigation__link" href=""> Contacts </a>

                </nav>

            </div>

            <main class="mdl-layout__content">

                <div class="page-content">

                    <div class="mdl-grid">

                        <div class="mdl-card mdl-shadow--2dp mdl-cell mdl-cell--3-col mdl-cell--4-col-phone">

                            <figure class="mdl-card__media">

                                <img src="./images/mdlLogo.png" alt="" />

                            </figure>

                            <div class="mdl-card__title">

                                <h1 class="mdl-card__title-text">Learning Web Design</h1>

                            </div>

                            <div class="mdl-card__supporting-text">

                                <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Aliquam accusamus, consectetur.</p>

                            </div>

                            <div class="mdl-card__actions mdl-card--border">

                                <a class="mdl-button mdl-button--colored mdl-js-button mdl-js-ripple-effect">Read More</a>

                                <div class="mdl-layout-spacer"></div>

                                <button class="mdl-button mdl-button--icon mdl-button--colored"><i class="material-icons">favorite</i></button>
                                <button class="mdl-button mdl-button--icon mdl-button--colored"><i class="material-icons">share</i></button>

                            </div>

                        </div>

                    </div>

                </div>

                <div class="mdl-layout-spacer"></div>

                <div class="mdl-grid">

                    <div class="mdl-cell mdl-cell--3-col mdl-cell--4-col-phone card-lesson mdl-card mdl-color--indigo mdl-shadow--2dp">

                        <div class="mdl-card__title">

                            <h2 class="mdl-card__title-text">"Hello, World!"</h2>

                        </div>

                        <div class="mdl-card__supporting-text">

                            The first thing we need to do is define where we want to keep our workspace. Our workspace is simply the folder on our computer where all of our projects are stored. Select                         or...

                        </div>

                        <div class="mdl-card__actions mdl-card--border">

                            <button class="mdl-button mdl-button--colored mdl-js-button mdl-js-ripple-effect">Learn More</button>

                        </div>

                    </div>

                </div>

            </main>

        </div>

代码本身非常简单，我不明白为什么它会以错误的方式对齐。

根据要求，CSS也是如此：

.mdl-card__media {

    margin: 0;

}

.mdl-card__media > img {

    max-width: 100%;

}

.mdl-card__actions {

    display: flex;
    box-sizing: border-box;
    align-items: center;

}

.mdl-card__actions > .mdl-button--icon {+

    margin-right: 3px;
    margin-left: 3px;

}

.mdl-layout-title {

    font-family: "Roboto Mono" ;

}

提前感谢您的帮助！

Answer 1

不要将mdl-card和mdl-cell放在同一个div中，而是将卡片包裹在单元格中，使一个单元格水平对齐。

<div class="mdl-cell mdl-cel--3-col"> <div class="mdl-card"></div> </div>