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HTML5video播放器全屏(fullScreen)实现的方法

来源：宝玛科技网

这篇文章主要介绍了HTML5 video播放器全屏(fullScreen)方法实例,本文直接给出一个完整代码实例,需要的朋友可以参考下

首先来说，这个标题具有误导性，但这样设置改标题也是主要因为video使用的比较多

在html5中，全屏方法可以适用于很多html 元素，不仅仅是video

<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<title>全屏问题</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<meta http-equiv="imagetoolbar" content="no"/>
<meta name="apple-mobile-web-app-capable" content="yes"/>
<meta http-equiv="X-UA-Compatible" content="IE=Edge">
<style type="text/css">
*{
 padding: 0px;
 margin: 0px;
}

body p.videobox{
 width: 400px;
 height: 320px;
 margin: 100px auto;
 background-color:#000;
}

body p.videobox video.video
{
width: 100%;
 height: 100%;
}

:-webkit-full-screen {

}

:-moz-full-screen {

}

:-ms-fullscreen {

}

:-o-fullscreen {

}

:full-screen { 

}

:fullscreen {

}

:-webkit-full-screen video {
 width: 100%;
 height: 100%;
}
:-moz-full-screen video{
 width: 100%;
 height: 100%;
}
 </style>
</head>
<body>


<p id="videobox">

 <video controls="controls" preload="preload" id="video" poster="poster.jpg">
 <source src="./movie.ogg" type="video/ogg" />
 <source src="./movie.mp4" type="video/mp4" />
 <source src="./movie.webm" type="video/webm" />
 <object data="./movie.mp4" width="100%" height="100%">
 <embed width="100%" height="100%" src="./movie.swf" />
 </object>

 </video>
 <button id="fullScreenBtn">全屏</button>
</p>


<script type="text/javascript">

//反射調用
var invokeFieldOrMethod = function(element, method) 
{
 var usablePrefixMethod;
 ["webkit", "moz", "ms", "o", ""].forEach(function(prefix) {
 if (usablePrefixMethod) return;
 if (prefix === "") {
 // 无前缀，方法首字母小写
 method = method.slice(0,1).toLowerCase() + method.slice(1); 
 }
 var typePrefixMethod = typeof element[prefix + method];
 if (typePrefixMethod + "" !== "undefined") {
 if (typePrefixMethod === "function") {
 usablePrefixMethod = element[prefix + method]();
 } else {
 usablePrefixMethod = element[prefix + method];
 }
 }
 });

 return usablePrefixMethod;
};

//進入全屏
function launchFullscreen(element) 
 {
 //此方法不可以在異步任務中執行，否則火狐無法全屏
 if(element.requestFullscreen) {
 element.requestFullscreen();
 } else if(element.mozRequestFullScreen) {
 element.mozRequestFullScreen();
 } else if(element.msRequestFullscreen){ 
 element.msRequestFullscreen(); 
 } else if(element.oRequestFullscreen){
 element.oRequestFullscreen();
 }
 else if(element.webkitRequestFullscreen)
 {
 element.webkitRequestFullScreen();
 }else{

 var docHtml = document.documentElement;
 var docBody = document.body;
 var videobox = document.getElementById('videobox');
 var cssText = 'width:100%;height:100%;overflow:hidden;';
 docHtml.style.cssText = cssText;
 docBody.style.cssText = cssText;
 videobox.style.cssText = cssText+';'+'margin:0px;padding:0px;';
 document.IsFullScreen = true;

 }
 }
//退出全屏
 function exitFullscreen()
 {
 if (document.exitFullscreen) {
 document.exitFullscreen();
 } else if (document.msExitFullscreen) {
 document.msExitFullscreen();
 } else if (document.mozCancelFullScreen) {
 document.mozCancelFullScreen();
 } else if(document.oRequestFullscreen){
 document.oCancelFullScreen();
 }else if (document.webkitExitFullscreen){
 document.webkitExitFullscreen();
 }else{
 var docHtml = document.documentElement;
 var docBody = document.body;
 var videobox = document.getElementById('videobox');
 docHtml.style.cssText = "";
 docBody.style.cssText = "";
 videobox.style.cssText = "";
 document.IsFullScreen = false;
 }
 }
document.getElementById('fullScreenBtn').addEventListener('click',function(){
 launchFullscreen(document.getElementById('video')); 
 window.setTimeout(function exit(){
//檢查瀏覽器是否處於全屏
if(invokeFieldOrMethod(document,'FullScreen') || invokeFieldOrMethod(document,'IsFullScreen') || document.IsFullScreen)
{
exitFullscreen();
}
 },5*1000);
},false);

</script>
</body>

</html>