物化框架中的水平和垂直对齐

Question

如何将登录框水平和垂直居中？

这是我的结构:

<div class="container">
<div class="row">
<div class="col s12 m6">
    <div class="card">
        <div class="card-content">
            <span class="card-title black-text">Sign In</span>
            <form>
                <div class="row">
                    <div class="input-field col s12">
                        <input placeholder="Placeholder" id="firstname" type="text" class="validate">
                        <label for="firstname" class="active">First Name</label>
                    </div>
                </div>
                <div class="row">
                    <div class="input-field col s12">
                        <input placeholder="Placeholder" id="lastname" type="text" class="validate">
                        <label for="lastname" class="active">Last Name</label>
                    </div>
                </div>
            </form>
        </div>
        <div class="card-action">
            <input type="submit" class="btn" value="Sign In">
        </div>
    </div>
</div>

我尝试使用valign-wrapper和valign类,但它不起作用.

Answer 1

这是正确的(materializecss)方式,没有凌乱的CSS:

<div class="valign-wrapper" style="width:100%;height:100%;position: absolute;">
    <div class="valign" style="width:100%;">
        <div class="container">
           <div class="row">
              <div class="col s12 m6 offset-m3">
                 <div class="card">
                    <div class="card-content">
                       <span class="card-title black-text">Sign In</span>
                       <form>
                          <div class="row">
                             <div class="input-field col s12">
                                <input placeholder="Placeholder" id="firstname" type="text" class="validate">
                                <label for="firstname" class="active">First Name</label>
                             </div>
                          </div>
                          <div class="row">
                             <div class="input-field col s12">
                                <input placeholder="Placeholder" id="lastname" type="text" class="validate">
                                <label for="lastname" class="active">Last Name</label>
                             </div>
                          </div>
                       </form>
                    </div>
                    <div class="card-action">
                       <input type="submit" class="btn" value="Sign In">
                    </div>
                 </div>
              </div>
           </div>
        </div>
    </div>
</div>

Answer 2

只需使用offset对齐.将卡片视图偏移剩下的一半.

<div class="container">
  <div class="row">
    <div class="col s12 m6 offset-m3">
      <div class="card">
        <div class="card-content">
          <span class="card-title black-text">Sign In</span>
          <form>
            <div class="row">
              <div class="input-field col s12">
                <input placeholder="Placeholder" id="firstname" type="text" class="validate">
                <label for="firstname" class="active">First Name</label>
              </div>
            </div>
            <div class="row">
              <div class="input-field col s12">
                <input placeholder="Placeholder" id="lastname" type="text" class="validate">
                <label for="lastname" class="active">Last Name</label>
              </div>
            </div>
          </form>
        </div>
        <div class="card-action">
          <input type="submit" class="btn" value="Sign In">
        </div>
      </div>
    </div>

Answer 3

尝试这个解决方案,我希望它可以帮助你

.card {
     position: absolute;
     left: 50%;
     top: 50%;
     -moz-transform: translate(-50%, -50%)
     -webkit-transform: translate(-50%, -50%)
     -ms-transform: translate(-50%, -50%)
     -o-transform: translate(-50%, -50%)
     transform: translate(-50%, -50%);
}

你也可以试试

body (or container-div) {
    display: flex;
    align-items: center;
    justify-content: center;
}

Answer 4

你有没有尝试过

.col.s12.m6{
    float: none;
    margin: 100px auto;
    width: 300px;
    height: 300px;
}

看看这个小提琴， http://fiddle.jshell.net/8vu47fb2/

使用 margin-top、margin-bottom 将框居中对齐。