H5打造屬於自己的影片播放器（JS篇1）

newsning發表於2016-08-16
H5播放器JS

回顧

1）H5打造屬於自己的影片播放器（HTML篇）
2）H5打造屬於自己的影片播放器（邏輯篇）

前言

在HTML篇當中我們寫好了樣式，今天我們為video新增一個樣式

.bad-video video {
    width: 100%;
    height: 100%;
    display: block;
    object-fit:fill;
}

高,寬,內容，都充父元素

乳此一來，我們的HMTL元素內容為

        <div class="bad-video">
            <video webkit-playsinline>
                <source src='xx.mp4' type="video/mp4"></source>
                <p>裝置不支援</p>
            </video>
            
            <img src="img/play.png" class="vplay" />
            <div class="controls">
                <div>
                    <div class="progressBar">
                        <div class="timeBar"></div>
                    </div>
                </div>
                <div><span class="current">00:00</span>/<span class="duration">00:00</span></div>
                <div><span class="fill">全屏</span></div>
            </div>
        </div>

吹著口哨寫JS

幸好我們在寫JS之前，先整理好了邏輯思緒，並寫好了筆記H5打造屬於自己的影片播放器（邏輯篇）

以下文章將要用到 號稱 最接近原生APP體驗的高效能前端框架 的 MUI

首先，讓我們來新建一個js檔案，比如，bvd.js 並註冊一下全域性的一個入口

(function($){
    var bvd = function(dom) {
        this.dom = document.querySelector(dom || 'video');
    }
    
    var pro = bvd.prototype;
    
    pro.test = function(){
        console.log(this.dom)
    }
    
    
    var nv = null;
    $.bvd = function(dom) {
        return nv || (nv = new bvd(dom));
    }
}(mui))

讓我們在video.html引入bvd.js 並且來測試一下吧！

<scrpit src="js/mui.min.js"></script>
<script src="js/bvd.js"></script>
        <script>
            var v = mui.bvd();
            v.test();
        </script>

clipboard.png

看來是ok的，與此同時，為了html頁的簡潔美觀，我們將播放按鈕和控制條用JS動態生成

(function($){
    var bvd = function(dom) {
        var that = this;
        $.ready(function(){
            //獲取影片元素
            that.video = document.querySelector(dom || 'video');
            //獲取影片父元素
            that.vRoom = that.video.parentNode;
            //元素初始化
            that.initEm();
        })
    }
    
    var pro = bvd.prototype;
    
    pro.initEm = function(){
        //先新增播放按鈕
        this.vimg = document.createElement("img");
        this.vimg.src = 'img/play.png';
        this.vimg.className = 'vplay';
        this.vRoom.appendChild(this.vimg);
        
    }
    
    
    var nv = null;
    $.bvd = function(dom) {
        return nv || (nv = new bvd(dom));
    }
}(mui))

這裡有個小細節，如果img的src設定為本地資源的話，那麼以後使用會出現很多問題，比如，頁面層級發生變化時，你要去修改bvd.js，以免夜長夢多，我們將圖片轉為base64

再新增控制條

pro.initEm = function(){
        //先新增播放按鈕
        this.vimg = document.createElement("img");
        this.vimg.src = 'data:image/png;base64,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';
        this.vimg.className = 'vplay';
        this.vRoom.appendChild(this.vimg);
        
        //新增控制條
        this.vC = document.createElement("div");
        this.vC.classList.add('controls');
        this.vC.innerHTML = '<div><div class="progressBar"><div class="timeBar"></div></div></div><div><span class="current">00:00</span>/<span class="duration">00:00</span></div><div><span class="fill">全屏</span></div>';
        this.vRoom.appendChild(this.vC);
        
        
    }

再把 video.html中的 播放按鈕 和 控制條 註釋，看看我們寫的程式碼效果如何

clipboard.png
大家可以看到，紅色是我們註釋的，綠色的是我們js生成的，奈斯

開始播放

真正開始我們js篇的第一步啦

初始化事件，先寫個播放按鈕播放影片事件測試一下

            //元素初始化
            that.initEm();
            //事件初始化
            that.initEvent();

----------

    pro.initEvent = function(){
        var that = this;
        //給播放按鈕圖片新增事件
        this.vimg.addEventListener('tap',function(){
            that.video.play();
        })
    }

tap事件，是MUI封裝好的一個適合移動端點選的事件哦，移動端click事件延遲300ms，建議大家多用tap，關於tap事件是如何模擬的，請看HTML5觸控事件演化tap事件介紹

喲西，影片開始播放拉！！！

clipboard.png

回顧一下H5打造屬於自己的影片播放器（邏輯篇）
溫習一下移動端HTML5<video>影片播放最佳化實踐

初始化

1）封面 在這裡我沒啥好圖，就不設定了，大家可以試試在video標籤加入屬性 poster="圖片地址"
2）獲取影片長度，ok，我們給影片新增一個"loadedmetadata"獲取到後設資料事件，什麼事後設資料？

舉個例子：一部電影30個G，名字叫《我將帶頭衝鋒》，影片長300小時

大小，名稱，長度，等這些應該就算是後設資料了。

我們給影片新增一個獲取到後設資料事件

    pro.initEvent = function(){
        var that = this;
        //給播放按鈕圖片新增事件
        this.vimg.addEventListener('tap',function(){
            this.style.display = 'none';
            that.video.play();
        })
        
        //獲取到後設資料
        this.video.addEventListener('loadedmetadata',function(){
            that.vC.querySelector('.duration').innerHTML = this.duration;
        });
    }

clipboard.png

果然出現了影片的長度，可是這是按秒計算的啊。。。

這時我們可以寫一個時間轉換的函式

    function stom(t) {
        var m = Math.floor(t / 60);
        m < 10 && (m = '0' + m);
        return m + ":" + (t % 60 / 100).toFixed(2).slice(-2);
    }

轉換一下

clipboard.png

可以，這很清真，今天我們暫時講到這，消化訊息，也讓樓主整頓一下思緒

本章節JS1原始碼放在這裡

H5打造屬於自己的影片播放器（JS篇2）

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