css3的flex布局

2021-06-24 19:06

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标签:class   没有   文档   log   using   模型   char   http   总结   

今天看到百度前端学院有关于flex布局方面的内容,就看了下flex布局,顺便做下总结,方便自己以后看。内容大概分几个方面,一、flex布局的好处以及应用场景;二、原理;三、基本内容;四、demo;

一、flex布局的好处以及应用场景:

flex好处就是灵活方便,大多应用在移动端,pc端由于兼容问题应用不太广泛。

二、原理:

说到原理说神马呢?先说下常见的布局吧:一、固定布局:就是宽高都固定的那种,width:500px;height:100px;二、流体式布局:width:100%;height:10%;移动端用rem;

三、弹性布局:就是flex布局;四:position:absolute;float:left;之类的脱离文档流的形式;flex属于弹性布局;弹性布局是 一种更加有效的方式来对一个容器中的条目进行排列、对齐和分配空白空间。即便容器中条目的尺寸未知或是动态变化的,弹性盒布局模型也能正常的工作。在该布局模型中,容器会根据布局的需要,调整其中包含的条目的尺寸和顺序来最好地填充所有可用的空间。当容器的尺寸由于屏幕大小或窗口尺寸发生变化时,其中包含的条目也会被动态地调整。比如当容器尺寸变大时,其中包含的条目会被拉伸以占满多余的空白空间;当容器尺寸变小时,条目会被缩小以防止超出容器的范围。弹性盒布局是与方向无关的。在传统的布局方式中,block 布局是把块在垂直方向从上到下依次排列的;而 inline 布局则是在水平方向来排列。弹性盒布局并没有这样内在的方向限制,可以由开发人员自由操作。

三、基本内容:包括一些基本属性,用法,参考下列网址

https://segmentfault.com/a/1190000002910324

http://www.w3cplus.com/css3/flexbox-basics.html

https://developer.mozilla.org/zh-CN/docs/Web/CSS/CSS_Flexible_Box_Layout/Using_CSS_flexible_boxes

四、demo:包含了flex一些基本用法;

 

技术分享技术分享
  1 DOCTYPE html>
  2 html>
  3     head>
  4         meta charset="UTF-8">
  5         title>title>
  6         style>
  7             body{
  8                 background-color: #CCCCCC;
  9                 padding: 0;
 10                 margin: 0;
 11             }
 12             .box1 {             
 13               background-color: #fff;
 14               display: flex;
 15               flex-flow: row wrap;
 16             }
 17             .box2 {             
 18               background-color: #fff;
 19               display: flex;
 20               justify-content: space-around;
 21             }
 22             .box3 {             
 23               background-color: #fff;
 24               display: flex;
 25               justify-content: flex-end;
 26             }
 27             .box4 {             
 28               background-color: #fff;
 29               display: flex;
 30               justify-content: space-between;
 31             }
 32             .box5 {             
 33               background-color: #fff;
 34               display: flex;
 35               flex-wrap: wrap;
 36               align-items: flex-start;
 37               margin: 10px;
 38             }
 39             .box6 {             
 40               background-color: #fff;
 41               display: flex;
 42               flex-flow: row wrap;
 43             }
 44             .item{
 45             text-align: center;
 46             margin: 5px;            
 47             width: 50px;
 48               height: 50px;
 49               border-radius: 100%;
 50               background-color: #000;
 51               color: #fff;
 52             }
 53             .item2{
 54             text-align: center;
 55             margin: 5px;            
 56             width: 40px;
 57               height: 40px;
 58               border-radius: 100%;
 59               background-color: #000;
 60               color: #fff;
 61             }
 62             .item5{
 63             text-align: center;
 64             margin: 5px;            
 65             width: 40px;
 66               height: 40px;
 67               border-radius: 100%;
 68               background-color: #000;
 69               color: #fff;
 70                order: 3;
 71             }
 72             .item6{
 73             text-align: center;
 74             margin: 5px;            
 75             width: 40px;
 76               height: 40px;
 77               border-radius: 100%;
 78               background-color: #000;
 79               color: #fff;
 80               order: 2;
 81             }
 82             .item7{
 83             text-align: center;
 84             margin: 5px;            
 85             width: 40px;
 86               height: 40px;
 87               border-radius: 100%;
 88               background-color: #000;
 89               color: #fff;
 90               order: 1;
 91             }
 92             .item8{
 93             text-align: center;
 94             margin: 5px;            
 95             width: 40px;
 96               height: 40px;
 97               border-radius: 100%;
 98               background-color: #000;
 99               color: #fff;
100               order: 0;
101             }
102         style>
103     head>
104     body>
105         div class="box1">
106             display: flex;
107               flex-flow: row wrap;
108               span class="item">1span>
109               span class="item">2span>
110               span class="item">3span>
111               span class="item">4span>
112               span class="item">5span>
113               span class="item">6span>
114         div>
115         div class="box2">
116             justify-content: space-around;
117               span class="item">1span>
118               span class="item">2span>
119               span class="item">3span>
120               span class="item">4span>
121               span class="item">5span>
122               span class="item">6span>
123         div>
124         div class="box3">
125             justify-content: flex-end;
126               span class="item">1span>
127               span class="item">2span>
128               span class="item">3span>
129               span class="item">4span>
130               span class="item">5span>
131               span class="item">6span>
132         div>
133         div class="box4">justify-content: space-between;
134               span class="item">1span>
135               span class="item">2span>
136               span class="item">3span>
137               span class="item">4span>
138               span class="item">5span>
139               span class="item">6span>
140         div>
141         div class="box5">align-items: flex-start;
142               span class="item">1span>
143               span class="item2">2span>
144               span class="item">3span>
145               span class="item2">4span>
146               span class="item">5span>
147               span class="item2">6span>
148               span class="item">1span>
149               span class="item">2span>
150               span class="item2">3span>
151               span class="item">4span>
152               span class="item">5span>
153               span class="item2">6span>
154               span class="item">1span>
155               span class="item">2span>
156               span class="item2">3span>
157               span class="item">4span>
158               span class="item2">5span>
159               span class="item">6span>
160               span class="item2">1span>
161               span class="item">2span>
162               span class="item2">3span>
163               span class="item">4span>
164               span class="item2">5span>
165               span class="item">6span>
166               span class="item">1span>
167               span class="item">2span>
168               span class="item2">3span>
169               span class="item2">4span>
170               span class="item">5span>
171               span class="item">6span>
172         div>
173         div class="box6">order
174               span class="item5">1span>
175               span class="item6">2span>
176               span class="item7">3span>
177               span class="item8">4span>
178         div>
179     body>
180 html>
View Code

 

技术分享技术分享
 1 DOCTYPE html>
 2 html lang="en">
 3 head>
 4     meta charset="UTF-8">
 5     title>centertitle>
 6     style>
 7     body{
 8     padding: 0;
 9     margin: 0;
10     }
11     .parent {
12     flex-flow: row wrap;    
13       display: flex;
14       height: 100px;
15     }
16     .a {
17       width: 100px;  
18       border: 1px solid #FF0000;
19       flex-grow: 1;
20       
21     }
22     .b {
23       width: 100px;  
24       border: 1px solid #FF0000;
25       flex-grow: 2;
26        
27     }
28     .c {
29       width: 100px;  
30       border: 1px solid #FF0000;
31       flex-grow: 3;
32       
33     }
34     style>
35 head>
36 body>
37     div class="parent">
38         div class="a">1div>
39         div class="b">2div>
40         div class="c">3div>
41     div>
42 body>
43 html>
View Code

 

 

参考内容:

http://blog.csdn.net/u010297791/article/details/54945290

http://www.ruanyifeng.com/blog/2015/07/flex-examples.html

 

https://segmentfault.com/a/1190000002910324

 

http://www.w3cplus.com/css3/flexbox-basics.html

 

https://developer.mozilla.org/zh-CN/docs/Web/CSS/CSS_Flexible_Box_Layout/Using_CSS_flexible_boxes

http://www.cnblogs.com/imwtr/p/4767664.html

 

css3的flex布局

标签:class   没有   文档   log   using   模型   char   http   总结   

原文地址:http://www.cnblogs.com/gaoxuerong123/p/7157621.html


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