H5打造属于自己的视频播放器（JS篇1）

摘要：我们给视频添加一个获取到元数据事件给播放按钮图片添加事件获取到元数据果然出现了视频的长度，可是这是按秒计算的啊。。。

1）H5打造属于自己的视频播放器（HTML篇）
2）H5打造属于自己的视频播放器（逻辑篇）

在HTML篇当中我们写好了样式，今天我们为video新增一个样式

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

高,宽,内容，都充父元素

乳此一来，我们的HMTL元素内容为

        

            
            
            
            

                

                    

                        

                    
                
                
00:00/00:00
                
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幸好我们在写JS之前，先整理好了逻辑思绪，并写好了笔记H5打造属于自己的视频播放器（逻辑篇）

以下文章将要用到 号称 最接近原生APP体验的高性能前端框架 的 MUI

首先，让我们来新建一个js文件，比如，bvd.js 并注册一下全局的一个入口

(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))

让我们在video.html引入bvd.js 并且来测试一下吧！

看来是ok的，与此同时，为了html页的简洁美观，我们将播放按钮和控制条用JS动态生成

(function($){
    var bvd = function(dom) {
        var that = this;
        $.ready(function(){
            //获取视频元素
            that.video = document.querySelector(dom || "video");
            //获取视频父元素
            that.vRoom = that.video.parentNode;
            //元素初始化
            that.initEm();
        })
    }
    
    var pro = bvd.prototype;
    
    pro.initEm = function(){
        //先添加播放按钮
        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))

这里有个小细节，如果img的src设置为本地资源的话，那么以后使用会出现很多问题，比如，页面层级发生变化时，你要去修改bvd.js，以免夜长梦多，我们将图片转为base64

再添加控制条

pro.initEm = function(){
        //先添加播放按钮
        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);
        
        //添加控制条
        this.vC = document.createElement("div");
        this.vC.classList.add("controls");
        this.vC.innerHTML = "
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";
        this.vRoom.appendChild(this.vC);
        
        
    }

再把 video.html中的 播放按钮 和 控制条 注释，看看我们写的代码效果如何

大家可以看到，红色是我们注释的，绿色的是我们js生成的，奈斯

真正开始我们js篇的第一步啦

初始化事件，先写个播放按钮播放视频事件测试一下

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

----------

    pro.initEvent = function(){
        var that = this;
        //给播放按钮图片添加事件
        this.vimg.addEventListener("tap",function(){
            that.video.play();
        })
    }

tap事件，是MUI封装好的一个适合移动端点击的事件哦，移动端click事件延迟300ms，建议大家多用tap，关于tap事件是如何模拟的，请看HTML5触摸事件演化tap事件介绍

哟西，视频开始播放拉！！！

回顾一下H5打造属于自己的视频播放器（逻辑篇）
温习一下移动端HTML5

1）封面 在这里我没啥好图，就不设置了，大家可以试试在video标签加入属性 poster="图片地址"
2）获取视频长度，ok，我们给视频添加一个"loadedmetadata"获取到元数据事件，什么事元数据？

举个栗子：一部电影30个G，名字叫《我将带头冲锋》，视频长300小时

大小，名称，长度，等这些应该就算是元数据了。

我们给视频添加一个获取到元数据事件

    pro.initEvent = function(){
        var that = this;
        //给播放按钮图片添加事件
        this.vimg.addEventListener("tap",function(){
            this.style.display = "none";
            that.video.play();
        })
        
        //获取到元数据
        this.video.addEventListener("loadedmetadata",function(){
            that.vC.querySelector(".duration").innerHTML = this.duration;
        });
    }

果然出现了视频的长度，可是这是按秒计算的啊。。。

这时我们可以写一个时间转换的函数

    function stom(t) {
        var m = Math.floor(t / 60);
        m < 10 && (m = "0" + m);
        return m + ":" + (t % 60 / 100).toFixed(2).slice(-2);
    }

转换一下

可以，这很清真，今天我们暂时讲到这，消化消息，也让楼主整顿一下思绪

本章节JS1源码放在这里

H5打造属于自己的视频播放器（JS篇2）