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图像位于div顶部的中间

css html

Matheno · 技术社区 · 5 年前

在我的应用程序中,我有一个居中的主分区。现在我想把我的徽标放在分区的中间。如图所示:

但是,当我的屏幕尺寸改变时,图片就被放错了位置。

<div class="is-vertical-center">
  <div class="box">
      <div class="text-center">
        <img class="img-on-top" src="assets/logo.png">
      </div>
      <div class="router-outlet">
        <div class="pure-g">
          <div class="pure-u-1-1">
              <h5>Start</h5>
          </div>
        </div>
        <div class="pure-g">
          <div class="pure-u-1-1">
              <p>
                 Welcome Lorem ipsum
              </p>
          </div>
        </div>
      </div>
  </div>
</div>

CSS:

.is-vertical-center {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.box {
  background-color: $color-ts-main-flat;
  border: 1px solid $color-ts-main-border;
  border-radius: 4px;
  max-width: 30%;
  padding: 20px;
}

.text-center {
  text-align: center !important;
}

.img-on-top {
  top:0;
  margin-top:5%;
  position:absolute;
  right: 50%;
}

.router-outlet {
  flex: 1 0 100px;
  background-color:blue;

  /* stretch element immediately following the router-outlet element within the same parent element.
   * This is the element injected by angular (Assumption)
   */
  router-outlet + * {
    height: 100%;
    width: 100%;
  }
}

我做了一把小提琴,有人能指给我正确的方向吗?

https://jsfiddle.net/x78a3oyj/

提前谢谢。

2 回复 | 直到 5 年前

Gildas.Tambo 5 年前

添加 transform3d 子元素

.img-on-top {
    top: 0;
    transform: translate3d(-50%, -50%, 0);
    position: absolute;
    left: 50%;/*change to left*/
    width: 60px; /*set a width*/
    background: hsl(106, 100%, 34%);
}

然后在父元素上,设置 position relative

.box {
  background-color: $color-ts-main-flat;
  border: 1px solid $color-ts-main-border;
  border-radius: 4px;
  max-width: 30%;
  padding: 20px;
  position: relative;/*add this*/
  background: hsl(0, 100%, 50%);
  margin-top: 3rem;
}

最后的密码是:

.is-vertical-center {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.box {
  background-color: $color-ts-main-flat;
  border: 1px solid $color-ts-main-border;
  border-radius: 4px;
  max-width: 30%;
  padding: 20px;
  position: relative;
  background: hsl(0, 100%, 50%);
  margin-top: 3rem;
}

.text-center {
  text-align: center !important;
}

.img-on-top {
    top: 0;
    transform: translate3d(-50%, -50%, 0);
    position: absolute;
    left: 50%;
    width: 60px;
    height: 60px;
    background: hsl(106, 100%, 34%);
}

.router-outlet {
  flex: 1 0 100px;
  background-color:blue;

  /* stretch element immediately following the router-outlet element within the same parent element.
   * This is the element injected by angular (Assumption)
   */
  router-outlet + * {
    height: 100%;
    width: 100%;
  }
}

<div class="is-vertical-center">
  <div class="box">
      <div class="text-center">
        <img class="img-on-top" src="assets/logo.png">
      </div>
      <div class="router-outlet">
        <div class="pure-g">
          <div class="pure-u-1-1">
              <h5>Start</h5>
          </div>
        </div>
        <div class="pure-g">
          <div class="pure-u-1-1">
              <p>
                 Welcome Lorem ipsum
              </p>
          </div>
        </div>
      </div>
  </div>
</div>

Piyush Teraiya 5 年前

你可以使用这个代码顶部的图片

body {
  margin: 0;
}

.is-vertical-center {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.box {
  background-color: $color-ts-main-flat;
  border: 1px solid $color-ts-main-border;
  border-radius: 4px;
  max-width: 30%;
  padding: 20px;
}

.text-center {
  text-align: center !important;
}

.img-on-top {
  top: 10px;
  margin-top: 0;
  position: absolute;
  right: 50%;
}

.router-outlet {
  flex: 1 0 100px;
  background-color: blue;
  /* stretch element immediately following the router-outlet element within the same parent element.
           * This is the element injected by angular (Assumption)
           */
}

.router-outlet+* {
  height: 100%;
  width: 100%;
}

<div class="is-vertical-center">
  <div class="box">
    <div class="text-center">
      <img class="img-on-top" src="assets/logo.png">
    </div>
    <div class="router-outlet">
      <div class="pure-g">
        <div class="pure-u-1-1">
          <h5>Start</h5>
        </div>
      </div>
      <div class="pure-g">
        <div class="pure-u-1-1">
          <p>
            Welcome Lorem ipsum
          </p>
        </div>
      </div>
    </div>
  </div>
</div>