css3学习笔记（一）
1. IE下的渐变： filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff',endColorstr='#ff0000',GradientType='0');
2.多背景：background:url(Images/c.png) no-repeat 0 0,url(Images/s-1.png) no-repeat 0 0;
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <style> .box { width:170px; height:170px; margin:0 auto; border:1px solid #000; background:url(Images/c.png) no-repeat 0 0,url(Images/s-1.png) no-repeat 0 0; -webkit-transition:1s all ease; /*后一个背景又叠加在前一个的下边*/ } .box:hover { background-position:-170px -170px,0 0; } </style> </head> <body> <div class="box"></div> </body> </html>
–background: -webkit-linear-gradient (top, rgba(255,255,255,1) 30%, rgba(255,255,255,0)), url(a.gif)
仿苹果开机效果：
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <style> body { background:#000; } .box { width:738px; text-align:center; font-weight:bold; margin:0 auto; font-size:100px; font-family:'Microsoft YaHei'; color:rgba(255,255,255,0.2); background:-webkit-linear-gradient(-30deg,rgba(255,255,255,0.1) 10%,rgba(255,255,255,1) 20%,rgba(255,255,255,0) 30%); -webkit-background-clip:text; -webkit-transition:1s linear all; } .box:hover { background-position:500px 0; } </style> </head> <body> <div class="box">人气不过肥皂泡</div> </body> </html>
3.rgba：
l含义
•r Red 红 0-255
•g Green 绿 0-255
•b Blue 蓝 0-255
•a Alpha 透明 0-1
background:rgba(0,0,0,0.4);
4.背景图裁切 background-clip
•border： 从border区域向外裁剪背景。
•padding： 从padding区域向外裁剪背景。
•content： 从content区域向外裁剪背景。
•no-clip： 从border区域向外裁剪背景。
•text :文本
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <style> .box { width:500px; height:200px; background:url(Images/a4.jpg); border:20px solid rgba(0,0,0,0.3); padding:20px;margin:0 auto; font-size:80px; font-family:"Microsoft YaHei";font-weight:bold; color:rgba(0,0,0,0.1); -webkit-background-clip:text; -webkit-transition:1s background-position linear; } .box:hover { background-position:0 1000px; } </style> </head> <body> <div class="box"> 我们都没错，只是不适合! </div> </body> </html>
5.背景图大小设置 background-size:20px 20px;
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <style> .box { width:800px;height:300px; margin:0 auto; background:url(Images/new_bg.png) no-repeat center; border:1px solid #000; background-size:20px 20px; -webkit-transition:1s all linear; } .box:hover {background-size:200px 200px; } </style> </head> <body> <div class="box"></div> </body> </html>
例：背景全屏固定显示： body{margin:0;height:1000px;background:url(miaov.png) no-repeat fixed; background-size:100% 100%;}
6.背景图原点设置
lbackground-origin ： border | padding | content
•border-box： 从border区域开始显示背景。
•padding-box： 从padding区域开始显示背景。
•content-box： 从content区域开始显示背景。
background-origin:content-box;
7.盒模型阴影 box-shadow:10px 10px 10px 4px rgba(0,0,0,0.8);
l用法
•box-shadow:[inset] x y blur [spread] color
•参数
–inset：投影方式
»inset：内投影
»不给：外投影
–x、y：阴影偏移
–blur：模糊半径
–spread：扩展阴影半径
»先扩展原有形状，再开始画阴影
–color
8.渐变 background:-webkit-linear-gradient(45deg,red 0%,yellow 50%,blue 100%); /*角度是逆时针的*/
background:-webkit-radial-gradient()/-webkit-linear-gradient()/-webkit-repeating-linear-gradient()/-webkit-repeating-radial-gradient() 反复径向渐变
例1：-webkit-linear-gradient()
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <style> .box { width:200px; height:200px; border:1px solid #000; background:-webkit-linear-gradient(45deg,red 0%,yellow 50%,blue 100%);/*角度是逆时针的*/ } </style> </head> <body> <div class="box"></div> </body> </html>
例2：-webkit-repeating-linear-gradient()
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <style> .box { width:200px; height:200px; border:1px solid #000; background:-webkit-repeating-linear-gradient(left,#f00,#fffc00,#01b439,#00eaff,#000390,#ff00c6), } </style> </head> <body> <div class="box"></div> </body> </html>
9.渐变配合背景 background:-webkit-linear-gradient(left top,#fff 0%,rgba(255,255,255,0) 40%,rgba(255,255,255,0) 50%,rgba(255,255,255,1) 50%,rgba(255,255,255,1) 60%,rgba(255,255,255,0) 60%,rgba(255,255,255,0) 70%,rgba(255,255,255,1) 70%),url(Images/new_bg.png) no-repeat;
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <style> .box { width:440px; height:300px; background:-webkit-linear-gradient(left top,#fff 0%,rgba(255,255,255,0) 40%,rgba(255,255,255,0) 50%,rgba(255,255,255,1) 50%,rgba(255,255,255,1) 60%,rgba(255,255,255,0) 60%,rgba(255,255,255,0) 70%,rgba(255,255,255,1) 70%),url(Images/new_bg.png) no-repeat; } </style> </head> <body> <div class="box"></div> </body> </html>
10.渐变旋转 background:-webkit-linear-gradient(0deg,#ff6e02 0%,#fffc00 50%,#ff6e02 100%);
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <style> body{background:#5e3612;} #box { width:200px; height:200px;margin:30px auto; border:20px solid rgba(0,0,0,0.2); background:-webkit-linear-gradient(0deg,#ff6e02 0%,#fffc00 50%,#ff6e02 100%); } </style> <script> window.onload = function () { var oBox = document.getElementById("box"); oBox.iDeg = 0; oBox.onmouseover = function () { move(oBox, 360); } oBox.onmouseout = function () { move(oBox, 0); } } function move(obj, iTarget) { if (obj.timer) { clearInterval(obj.timer); } if (iTarget > obj.iDeg) { var iSpeed = 5; } else { var iSpeed = -5; } obj.timer = setInterval(function () { if (obj.iDeg == iTarget) { clearInterval(obj.timer); } else { obj.iDeg += iSpeed; obj.style.background = "-webkit-linear-gradient(" + obj.iDeg + "deg,#ff6e02 0%,#fffc00 50%,#ff6e02 100%)"; } }, 14); } </script> </head> <body> <div id="box"></div> </body> </html>
11.径向渐变 background:-webkit-radial-gradient(center,100px 200px,red 0%,blue 100%);
•参数
–起点：同线性渐变 默认：中心
–形状： ellipse、circle 默认： circle
–大小：要给出起点，否则会和“起点”冲突
»50px 50px
12.文字阴影
•最简单用法
–text-shadow:2px 2px 4px black
•阴影叠加
–text-shadow:2px 2px 0px red, 2px 2px 4px green;
–先渲染后面的，再渲染前面的
•text-shadow：x y blur color, …
•参数
–x 横向偏移
–y 纵向偏移
–blur 模糊距离
–color 阴影颜色
•文本阴影如果加很多层，会很卡很卡很卡
例1：text-shadow:10px 10px 20px #000,1px 1px 10px red,5px 5px 15px yellow;
文字描边
l-webkit-text-stroke:宽度 颜色
例2：text-shadow:6px 7px 0px #fdc9c9;-webkit-text-stroke:3px #fff;
