Flexbox中心

时间：2017-07-07 08:57:53

标签： html css css3 flexbox

我正在尝试将徽标放在页面的中央，但我希望文本位于徽标的中间（中间）和页面的底部。因此它位于中心徽标和页面底部的中心。因此，实际上，徽标位于页面的中心，但文本位于徽标和页面底部之间的中心。以下是我制作的JSFiddle以及下面的代码。我可以将所有内容集中在一起但不是我想要的方式，徽标位于中心，文本位于徽标和页面底部之间的中心。

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/* FRONT PAGE LOADER */

.loader {
  position: fixed;
  left: 0px;
  top: 0px;
  width: 100%;
  height: 100%;
  z-index: 9999;
  background: white;
  text-align: center;
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  flex-direction: column;
}

.centered {
  align-self: center;
}

.center-center {
  align-self: center;
}

.loading-img {
  width: 80px;
  height: 80px;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}


/*SPIN THE LOGO */

@-moz-keyframes spin {
  0% {
    -moz-transform: rotate(0deg);
  }
  100% {
    -moz-transform: rotate(360deg);
  }
}

@-o-keyframes spin {
  0% {
    -o-transform: rotate(0deg);
  }
  100% {
    -o-transform: rotate(360deg);
  }
}

@-webkit-keyframes spin {
  0% {
    -webkit-transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
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<div class="loader">
  <div class="centered" id="blank2"><img class="img-responsive loading-img" src="https://upload.wikimedia.org/wikipedia/commons/d/d0/Newscycle-Circle.png" />
    <p id="blank3">LOADING</p>
  </div>
  <div class="center-center">
    <h3 id="blank1">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras et ultricies risus. Sed pulvinar leo non ligula luctus aliquet.</h3>
  </div>
</div>
＆＃13;
＆＃13;
＆＃13;

2 个答案:

答案 0 :(得分：2)

为此，您需要将这2行添加到.loader规则中 （你还需要添加他们的前缀版本，我没有） 

justify-content: center;
align-items: center;

然后你需要添加一个 ghost 元素（我使用伪::before）来平衡底部文本并给它们flex-grow: 1; flex-basis: 0;这样它们共享剩余空间相等

.loader::before,
.center-center {
  content: '\00a0';
  flex-grow: 1;
  flex-basis: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

最后摆脱一些保证金，否则他们会让它看起来不起作用

.center-center h3 {
  margin: 0;
}
.centered p {
  margin-bottom: 0;
}


<!-- $(window).load(function () {
"use strict";

function loadingScreen() {
  $(".loader").fadeOut(2000);
}
(function() {
var counter = 3,
  h2 = document.getElementById("blank1"),
  spinningLogo = document.getElementById("blank2"),
  loadingText = document.getElementById("blank3");
setInterval(function() {
  counter -= 1;
  if (counter === 0) {
    clearInterval(counter);
    h2.innerHTML = "";
    spinningLogo.innerHTML = "";
    loadingText.innerHTML = "";
    loadingScreen();
  }
}, 1000);
}());
}); -->
/* FRONT PAGE LOADER */

.loader {
  position: fixed;
  left: 0px;
  top: 0px;
  width: 100%;
  height: 100%;
  z-index: 9999;
  background: white;
  text-align: center;
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.loader::before,
.center-center {
  content: '';
  flex-grow: 1;
  flex-basis: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.center-center h3 {
  margin: 0;
}
.centered p {
  margin-bottom: 0;
}

.loading-img {
  width: 80px;
  height: 80px;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}

/*SPIN THE LOGO */
@-moz-keyframes spin {
  0% {
    -moz-transform: rotate(0deg);
  }
  100% {
    -moz-transform: rotate(360deg);
  }
}

@-o-keyframes spin {
  0% {
    -o-transform: rotate(0deg);
  }
  100% {
    -o-transform: rotate(360deg);
  }
}
@-webkit-keyframes spin {
  0% {
    -webkit-transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="loader">
  <div class="centered" id="blank2"><img class="img-responsive loading-img" src="https://upload.wikimedia.org/wikipedia/commons/d/d0/Newscycle-Circle.png" />
    <p id="blank3">LOADING</p>
  </div>
  <div class="center-center">
    <h3 id="blank1">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras et ultricies risus. Sed pulvinar leo non ligula luctus aliquet.</h3>
  </div>
</div>

也可以使用transform: translate而不是伪，与Flexbox结合使用

请注意，它可以使文字和图像在较小（低）的屏幕上重叠 

<!-- $(window).load(function () {
"use strict";

function loadingScreen() {
  $(".loader").fadeOut(2000);
}
(function() {
var counter = 3,
  h2 = document.getElementById("blank1"),
  spinningLogo = document.getElementById("blank2"),
  loadingText = document.getElementById("blank3");
setInterval(function() {
  counter -= 1;
  if (counter === 0) {
    clearInterval(counter);
    h2.innerHTML = "";
    spinningLogo.innerHTML = "";
    loadingText.innerHTML = "";
    loadingScreen();
  }
}, 1000);
}());
}); -->
/* FRONT PAGE LOADER */

.loader {
  position: fixed;
  left: 0px;
  top: 0px;
  width: 100%;
  height: 100%;
  z-index: 9999;
  background: white;
  text-align: center;
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.center-center {
  position: absolute;
  top: 75%;
  width: 100%;
  left: 0;
  transform: translateY(-50%);
  text-align: center;
}

.center-center h3 {
  margin: 0;
}
.centered p {
  margin-bottom: 0;
}

.loading-img {
  width: 80px;
  height: 80px;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}

/*SPIN THE LOGO */
@-moz-keyframes spin {
  0% {
    -moz-transform: rotate(0deg);
  }
  100% {
    -moz-transform: rotate(360deg);
  }
}

@-o-keyframes spin {
  0% {
    -o-transform: rotate(0deg);
  }
  100% {
    -o-transform: rotate(360deg);
  }
}
@-webkit-keyframes spin {
  0% {
    -webkit-transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="loader">
  <div class="centered" id="blank2"><img class="img-responsive loading-img" src="https://upload.wikimedia.org/wikipedia/commons/d/d0/Newscycle-Circle.png" />
    <p id="blank3">LOADING</p>
  </div>
  <div class="center-center">
    <h3 id="blank1">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</h3>
  </div>
</div>

还可以单独使用transform: translate（它的浏览器支持比Flexbox略好）

请注意，它可以使文字和图像在较小（低）的屏幕上重叠 

<!-- $(window).load(function () {
"use strict";

function loadingScreen() {
  $(".loader").fadeOut(2000);
}
(function() {
var counter = 3,
  h2 = document.getElementById("blank1"),
  spinningLogo = document.getElementById("blank2"),
  loadingText = document.getElementById("blank3");
setInterval(function() {
  counter -= 1;
  if (counter === 0) {
    clearInterval(counter);
    h2.innerHTML = "";
    spinningLogo.innerHTML = "";
    loadingText.innerHTML = "";
    loadingScreen();
  }
}, 1000);
}());
}); -->
/* FRONT PAGE LOADER */

.loader {
  position: fixed;
  left: 0px;
  top: 0px;
  width: 100%;
  height: 100%;
  z-index: 9999;
  background: white;
  text-align: center;
}

.centered {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.center-center {
  position: absolute;
  top: 75%;
  width: 100%;
  left: 0;
  transform: translateY(-50%);
  text-align: center;
}

.center-center h3 {
  margin: 0;
}
.centered p {
  margin-bottom: 0;
}

.loading-img {
  width: 80px;
  height: 80px;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}

/*SPIN THE LOGO */
@-moz-keyframes spin {
  0% {
    -moz-transform: rotate(0deg);
  }
  100% {
    -moz-transform: rotate(360deg);
  }
}

@-o-keyframes spin {
  0% {
    -o-transform: rotate(0deg);
  }
  100% {
    -o-transform: rotate(360deg);
  }
}
@-webkit-keyframes spin {
  0% {
    -webkit-transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="loader">
  <div class="centered" id="blank2"><img class="img-responsive loading-img" src="https://upload.wikimedia.org/wikipedia/commons/d/d0/Newscycle-Circle.png" />
    <p id="blank3">LOADING</p>
  </div>
  <div class="center-center">
    <h3 id="blank1">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</h3>
  </div>
</div>

答案 1 :(得分：0)

将display: flex添加到center-center并使用flex属性将文本置于剩余空间的中心位置：

＆＃13;
＆＃13; 
/* FRONT PAGE LOADER */

.loader {
  position: fixed;
  left: 0px;
  top: 0px;
  width: 100%;
  height: 100%;
  z-index: 9999;
  background: white;
  text-align: center;
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  flex-direction: column;
}

.center-center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.loading-img {
  width: 80px;
  height: 80px;
  -webkit-animation: spin 2s linear infinite;
  animation: spin 2s linear infinite;
}


/*SPIN THE LOGO */

@-moz-keyframes spin {
  0% {
    -moz-transform: rotate(0deg);
  }
  100% {
    -moz-transform: rotate(360deg);
  }
}

@-o-keyframes spin {
  0% {
    -o-transform: rotate(0deg);
  }
  100% {
    -o-transform: rotate(360deg);
  }
}

@-webkit-keyframes spin {
  0% {
    -webkit-transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(360deg);
  }
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
＆＃13; 
<div class="loader">
  <div class="centered" id="blank2"><img class="img-responsive loading-img" src="https://upload.wikimedia.org/wikipedia/commons/d/d0/Newscycle-Circle.png" />
    <p id="blank3">LOADING</p>
  </div>
  <div class="center-center">
    <h3 id="blank1">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras et ultricies risus. Sed pulvinar leo non ligula luctus aliquet.</h3>
  </div>
</div>
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