最近一個小遊戲項目用到了CSS3的動畫屬性,例如transition、transform、animation。通過三個星期,終於作完了,利用週末好好梳理總結一下。javascript
Internet Explorer 十、Firefox 以及 Opera 支持 @keyframes 規則和 animation 屬性。css
Chrome 和 Safari 須要前綴 -webkit-。html
animation: name duration timing-function delay iteration-count direction;
1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>delay</title> 6 <meta name="viewport" content="width=device-width, initial-scale=1" /> 7 8 <style type="text/css"> 9 @-webkit-keyframes delay{ 10 11 99%{ 12 -webkit-transform:translate(100px,0); 13 } 14 15 } 16 .delay{ 17 18 width:100px;height:100px; 19 background-color: #000; 20 -webkit-animation:delay 1s linear 2s infinite; 21 animation:delay 1s linear 2s infinite; 22 } 23 </style> 24 </head> 25 <body> 26 <div class="delay"></div> 27 </body> 28 </html>
1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>delay</title> 6 <meta name="viewport" content="width=device-width, initial-scale=1" /> 7 8 <style type="text/css"> 9 @-webkit-keyframes delay{ 10 11 100%{ 12 -webkit-transform:translate(100px,0); 13 } 14 15 } 16 .delay{ 17 18 width:100px;height:100px; 19 background-color: #000; 20 -webkit-animation:delay 1s linear 2 forwards alternate; 21 } 22 </style> 23 </head> 24 <body> 25 <div class="delay"></div> 26 </body> 27 </html>
1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>delay</title> 6 <meta name="viewport" content="width=device-width, initial-scale=1" /> 7 8 <style type="text/css"> 9 @-webkit-keyframes delay{ 10 11 100%{ 12 -webkit-transform:translate(100px,0); 13 } 14 15 } 16 .delay{ 17 18 width:100px;height:100px; 19 background-color: #000; 20 -webkit-animation:delay 1s linear 2 both alternate; 21 } 22 </style> 23 </head> 24 <body> 25 <div class="delay"></div> 26 </body> 27 </html>
兩段代碼主要說明在forwards和both的狀況下動畫在設置了反向運行偶次數時,效果仍然同樣。由於以前看到網上說的是forwards在偶次數反向是會停在關鍵幀的100%處,而不是0%處。java
1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>delay</title> 6 <meta name="viewport" content="width=device-width, initial-scale=1" /> 7 8 <style type="text/css"> 9 @-webkit-keyframes delay{ 10 11 100%{ 12 -webkit-transform:translate(100px,0); 13 } 14 15 } 16 .delay{ 17 18 width:100px;height:100px; 19 background-color: #000; 20 -webkit-animation:delay 1s linear 2 both alternate; 21 } 22 </style> 23 </head> 24 <body> 25 <div class="delay"></div> 26 <script type="text/javascript"> 27 window.onload = function(){ 28 var delay = document.getElementsByClassName('delay')[0], 29 time1, 30 time2; 31 delay.addEventListener('webkitAnimationStart',function(){ 32 time1 = new Date().getTime(); 33 time2 = time1; 34 console.log(time2-time1+'ms') 35 36 }) 37 delay.addEventListener('webkitAnimationIteration',function(){ 38 time2 = new Date().getTime(); 39 console.log(time2-time1+'ms') 40 }) 41 delay.addEventListener('webkitAnimationEnd',function(){ 42 time2 = new Date().getTime(); 43 console.log(time2-time1+'ms') 44 }) 45 } 46 </script> 47 </body> 48 </html>
從代碼能夠看出,iteration是在動畫重複執行的時候觸發的。web