參考文章:Flex 佈局教程:例項篇
一、骰子的佈局
- 骰子的一面,最多可以放置
9
個點。
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下面,就來看看Flex
如何實現,從1
個點到9
個點的佈局。
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如果不加說明,本節的HTML
模板一律如下:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- 頁面自動重新整理 -->
<meta http-equiv="refresh" content="1">
<title>Document</title>
<style>
* {
box-sizing: border-box;
}
html,
body {
height: 100%;
}
.box {
margin: 16px;
padding: 4px;
background-color: #e7e7e7;
width: 104px;
height: 104px;
object-fit: contain;
box-shadow:
inset 0 5px white,
inset 0 -5px #bbb,
inset 5px 0 #d7d7d7,
inset -5px 0 #d7d7d7;
border-radius: 10%;
/* flex容器屬性 */
display: flex;
}
.item {
display: block;
width: 24px;
height: 24px;
border-radius: 50%;
margin: 4px;
background-color: #333;
box-shadow: inset 0 3px #111, inset 0 -3px #555;
}
</style>
</head>
<body>
<div class="box">
<span class="item"></span>
<!-- <span class="item"></span> -->
</div>
</body>
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上面程式碼中,div
元素(代表骰子的一個面)是Flex
容器,span
元素(代表一個點)是Flex
專案。如果有多個專案,就要新增多個span
元素,以此類推。
1.1 單專案
- 首先,只有左上角
1
個點的情況。Flex
佈局預設就是首行左對齊,所以一行程式碼就夠了。
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.box {
display: flex;
}
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- 設定專案的對齊方式,就能實現居中對齊和右對齊。
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.box {
display: flex;
justify-content: center;
}
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.box {
display: flex;
justify-content: flex-end;
}
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- 設定交叉軸對齊方式,可以垂直移動主軸。
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.box {
display: flex;
align-items: center;
}
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.box {
display: flex;
justify-content: center;
align-items: center;
}
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.box {
display: flex;
justify-content: center;
align-items: flex-end;
}
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.box {
display: flex;
justify-content: flex-end;
align-items: flex-end;
}
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1.2 雙專案(先看容器佈局,在此基礎上移動專案佈局)
justify-content
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.box {
display: flex;
justify-content: space-between;
}
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flex-direction
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.box {
display: flex;
flex-direction: column;
justify-content: space-between;
}
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align-items
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.box {
display: flex;
flex-direction: column;
justify-content: space-between;
align-items: center;
}
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.box {
display: flex;
flex-direction: column;
justify-content: space-between;
align-items: flex-end;
}
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align-self
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.box {
display: flex;
}
.item:nth-child(2) {
align-self: center;
}
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.box {
display: flex;
justify-content: space-between;
}
.item:nth-child(2) {
align-self: flex-end;
}
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1.3 三專案
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.box {
display: flex;
}
.item:nth-child(2) {
align-self: center;
}
.item:nth-child(3) {
align-self: flex-end;
}
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二、專案flex屬性
- 兩個快捷值:
auto (1 1 auto)
和none (0 0 auto)
(1)
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.box {
display: flex;
}
.item {
flex: auto;
}
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(2)
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.box {
display: flex;
}
.item {
flex: none;
}
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(3)
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.box {
display: flex;
}
.item {
flex: 1; // 1 1 0%
}
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(4)
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.box {
display: flex;
}
.item {
flex: 1;
}
.item:nth-child(1){
flex: 0 0 100%;
}
.item:nth-child(2){
flex: 0 0 50%;
}
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