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如何让两个垂直元素的高度中的一个依赖于另一个?

responsive-design css html

Danny Lo · 技术社区 · 7 年前

底部元素是一个图像,应该与视口底部对齐。它应按比例调整大小,最大值为视口宽度的90%,最大值为视口高度的70%。上面的元素是一个文本元素,我希望它填充剩余的垂直空间,并将该文本水平和垂直地与中心对齐。

这就是我目前所拥有的。

body { 
    background-image: url('https://i.imgur.com/sWfZ8nq.png');
    background-repeat: repeat;
}

.fg {
    margin: auto;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    max-height: 100%;
}

.fg div {
    display: flex;
    align-items: center;
    position: absolute;
    width: 100%;
    height: 100%;
    max-height: 30%;
}

.fg span {
    width: 100%;
    text-align: center;
    color: white;
    font-size: 10vmin;
    letter-spacing: 3px;
    text-shadow:  2px  2px 2px green,
                  2px -2px 2px green,
                 -2px  2px 2px green,
                 -2px -2px 2px green;
}

.fg img {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    max-height: 70%;
    max-width: 90%;
}

<html>
  <head>
    <title>HNY</title>
    <meta charset="utf-8">
  </head>
  <body>
    <div class="fg">
      <div>
        <span>Happy new year!</span>
      </div>
      <img src="https://i.imgur.com/Ql8A585.png"/>
    </div>
  </body>
</html>

对于底部元素高度=70vh,例如对于分辨率1920 x 1080,这一点很好。但如果我翻转它,即切换到1080 x 1920,上面的框只需要30vh,但我希望它填满空间。有什么建议吗?

2 回复 | 直到 7 年前

user2332995 user2332995 7 年前

我做了 .fg flex-grow: 1;

body { 
    margin: 0;
    background-image: url('https://i.imgur.com/sWfZ8nq.png');
    background-repeat: repeat;
    font-size: 0;
}

* {
    box-sizing: border-box;
}

.fg {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100vw;
    height: 100vh;
}

.fg .text {
    display: flex;
    align-items: center;
    flex-basis: 0;
    flex-grow: 1;
    flex-shrink: 1;
}

.fg span {
    color: white;
    font-size: 10vmin;
    letter-spacing: 3px;
    text-shadow:  2px  2px 2px green,
                  2px -2px 2px green,
                 -2px  2px 2px green,
                 -2px -2px 2px green;
}

.fg .img {
    flex-basis: 0;
    flex-grow: 1;
    flex-shrink: 0;
    max-height: 70%;
    max-width: 90%;
}

@media (orientation: landscape) {
    img {
        height: 100%;
    }
}

@media (orientation: portrait) {
    img {
        width: 100%;
    }
}

<html>
  <head>
    <title>HNY</title>
    <meta charset="utf-8">
  </head>
  <body>
    <div class="fg">
      <div class="text">
        <span>Happy new year!</span>
      </div>
      <div class="img">
          <img src="https://i.imgur.com/Ql8A585.png" />
      </div>
    </div>
  </body>
</html>

Stedman Dennis 7 年前

我使用了网格css。我将.fg设置为100vh,将主体边距设置为0以避免溢出问题。因为您需要将上限重新绑定到img大小,所以我将网格行设置为: grid-template-rows: 1fr auto;

body { 
    background-image: url('https://i.imgur.com/sWfZ8nq.png');
    background-repeat: repeat;
    margin: 0;
}

.fg {
    display: grid;
    grid-template-rows: 1fr auto;
    margin: auto;
    height: 100vh;
}

.fg div {
    display: flex;
    align-items: center;
    width: 100%;
    height: 100%;
}

.fg span {
    width: 100%;
    text-align: center;
    color: white;
    font-size: 10vmin;
    letter-spacing: 3px;
    text-shadow:  2px  2px 2px green,
                  2px -2px 2px green,
                 -2px  2px 2px green,
                 -2px -2px 2px green;
}

.fg img {
	position: relative;
	bottom: 0;
	left: 50%;
	transform: translateX(-50%);
	max-height: 70vh;
	max-width: 90vw;
}

<html>
  <head>
    <title>HNY</title>
    <meta charset="utf-8">
  </head>
  <body>
    <div class="fg">
      <div>
        <span>Happy new year!</span>
      </div>
      <img src="https://i.imgur.com/Ql8A585.png"/>
    </div>
  </body>
</html>