html5——多媒体（三）

自定义进度条
1、video标签是内联块，可以设置宽高，但是需要用大盒子将其包裹起来进行定位
2、小盒子设计成进度条样式，并进行定位
3、进度条样式中的特殊按钮可以用web字体
4、通过点击实现视频的暂停/播放改变按钮的样式
5、获取视频的总时长，放到totalTime中
6、当视频播放的时候，动态谁知crrTime的值，并且改变进度条的样式
7、实现全屏效果
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="css/font-awesome.css">
    <style>
        * {
            padding: 0;
            margin: 0;
        }

        figcaption {
            text-align: center;
            font-size: 40px;
            margin: 50px auto;
        }

        .player {
            width: 720px;
            height: 360px;
            margin: 100px auto;
            background-color: #000;
            position: relative;
        }

        video {
            display: block;
            margin: 0 auto;
            height: 100%;
        }

        .control {
            width: 700px;
            height: 40px;
            position: absolute;
            background-color: rgba(63, 141, 56, 0.5);
            bottom: 10px;
            left: 10px;
            border-radius: 10px;
        }

        .switch {
            position: absolute;
            width: 40px;
            height: 40px;
            left: 10px;
            top: 0;
            font-size: 20px;
            line-height: 40px;
            text-align: center;
        }

        .progress {
            position: absolute;
            width: 460px;
            height: 10px;
            left: 60px;
            top: 15px;
            background-color: rgba(255, 255, 255, 0.4);
            border-radius: 5px;
        }

        .curr-progress {
            width: 0px;
            height: 100%;
            background-color: rgba(255, 255, 255, 1);
            border-radius: 10px;
        }

        .time {
            position: absolute;
            height: 40px;
            right: 60px;
            top: 0px;
            font: 400 12px/40px "simsun";
            text-align: center;
            color: white;
        }

        .extend {
            position: absolute;
            top: 0;
            right: 5px;
            width: 40px;
            height: 40px;
            text-align: center;
            line-height: 40px;
        }
    </style>
</head>
<body>
<figure>
    <figcaption>视频</figcaption>
    <div class="player">
        <video src="video/movie.mp4"></video>
        <div class="control">
            <span class="switch icon-play"></span>
            <div class="progress">
                <div class="curr-progress"></div>
            </div>
            <div class="time">
                <span class="curr-time">00:00:00</span>/<span class="total-time">00:00:00</span>
            </div>
            <!-- 全屏-->
            <span class="extend icon-resize-full"></span>
        </div>
    </div>
</figure>
<script>
    var player = document.querySelector(".player");
    var video = document.querySelector("video");
    var swt = document.querySelector(".switch");
    var extend = document.querySelector(".extend");
    //通过点击 实现 视频的暂停/播放 改变按钮的样式
    swt.onclick = function () {
        if (video.paused) {
            video.play();
            player.style.backgroundImage = "url()";
            swt.classList.remove("icon-play");
            swt.classList.add("icon-pause");
        }
        else {
            video.pause();
            swt.classList.remove("icon-pause");
            swt.classList.add("icon-play");
        }
    }
    var totalTime = 0;
    var currTime = 0;
    //获取视频的总时长，放到totalTime中
    video.oncanplay = function (ev) {
        totalTime = video.duration;
        var h = Math.floor(totalTime / 3600);
        var m = Math.floor(totalTime % 3600 / 60);
        var s = Math.floor(totalTime % 3600 % 60);
        h = h >= 10 ? h : "0" + h;
        m = m >= 10 ? h : "0" + m;
        s = s >= 10 ? s : "0" + s;
        document.querySelector(".total-time").innerHTML = h + ":" + m + ":" + s;
    }
    video.ontimeupdate = function (ev) {
        currTime = video.currentTime;
        var h = Math.floor(currTime / 3600);
        var m = Math.floor(currTime % 3600 / 60);
        var s = Math.floor(currTime % 3600 % 60);
        h = h >= 10 ? h : "0" + h;
        m = m >= 10 ? h : "0" + m;
        s = s >= 10 ? s : "0" + s;
        document.querySelector(".curr-time").innerHTML = h + ":" + m + ":" + s;
        var xishu = totalTime / currTime;
        document.querySelector(".curr-progress").style.width = (460 / xishu) + "px";
    }
    extend.onclick = function () {
        video.webkitRequestFullScreen();
    }
</script>
</body>
</html>