前言
前段時(shí)間基于vue寫(xiě)了一個(gè)自定義的video播放器組件,踩了一些小坑, 這里做一下復(fù)盤(pán)分享出來(lái),避免日后重復(fù)踩坑...
設(shè)計(jì)階段
這里就直接放幾張完成后的播放狀態(tài)圖吧,界面布局基本就是flex+vw適配一把梭,也比較容易.
需要實(shí)現(xiàn)的幾個(gè)功能基本都標(biāo)注出來(lái)了; 除了還有一個(gè)視頻加載失敗的...下面就這屆上代碼了;剛開(kāi)始構(gòu)思的時(shí)候考慮了一下功能的實(shí)現(xiàn)方式: 一是用原生的DOM操作,獲取video元素后,用addEventListener來(lái)監(jiān)聽(tīng); 二是用vue的方式綁定事件監(jiān)聽(tīng); 最后圖方便采用了兩者結(jié)合的方式,但是總感覺(jué)有點(diǎn)亂, 打算后期再做一下代碼格式優(yōu)化.
video組件實(shí)現(xiàn)過(guò)程
組件模板部分
主要是播放器的幾種播放狀態(tài)的邏輯理清楚就好了, 即: 播放中,緩存中,暫停,加載失敗這幾種情況,下面按功能分別說(shuō)一下
<template>
<div class="video-player">
<!-- 播放器界面; 兼容ios controls-->
<video
ref="video"
v-if="showVideo"
webkit-playsinline="true"
playsinline="true"
x-webkit-airplay="true"
x5-video-player-type="h5"
x5-video-player-fullscreen="true"
x5-video-orientation="portraint"
style="object-fit:fill"
preload="auto"
muted="true"
poster="https://photo.mac69.com/180205/18020526/a9yPQozt0g.jpg"
:src="src"
@waiting="handleWaiting"
@canplaythrough="state.isLoading = false"
@playing="state.isLoading = false, state.controlBtnShow = false, state.playing=true"
@stalled="state.isLoading = true"
@error="handleError"
>您的瀏覽器不支持HTML5</video>
<!-- 兼容Android端層級(jí)問(wèn)題, 彈出層被覆蓋 -->
<img
v-show="!showVideo || state.isEnd"
class="poster"
src="https://photo.mac69.com/180205/18020526/a9yPQozt0g.jpg"
alt
>
<!-- 控制窗口 -->
<div
class="control"
v-show="!state.isError"
ref="control"
@touchstart="touchEnterVideo"
@touchend="touchLeaveVideo"
>
<!-- 播放 || 暫停 || 加載中-->
<div class="play" @touchstart.stop="clickPlayBtn" v-show="state.controlBtnShow">
<img
v-show="!state.playing && !state.isLoading"
src="../../assets/video/content_btn_play.svg"
>
<img
v-show="state.playing && !state.isLoading"
src="../../assets/video/content_btn_pause.svg"
>
<div class="loader" v-show="state.isLoading">
<div class="loader-inner ball-clip-rotate">
<div></div>
</div>
</div>
</div>
<!-- 控制條 -->
<div class="control-bar" :style="{ visibility: state.controlBarShow ? 'visible' : 'hidden'}">
<span class="time">{{video.displayTime}}</span>
<span class="progress" ref="progress">
<img
class="progress-btn ignore"
:style="{transform: `translate3d(${video.progress.current}px, 0, 0)`}"
src="../../assets/video/content_ic_tutu.svg"
>
<span class="progress-loaded" :style="{ width: `${video.loaded}%`}"></span>
<!-- 設(shè)置手動(dòng)移動(dòng)的進(jìn)度條 -->
<span
class="progress-move"
@touchmove.stop.prevent="moveIng($event)"
@touchstart.stop="moveStart($event)"
@touchend.stop="moveEnd($event)"
></span>
</span>
<span class="total-time">{{video.totalTime}}</span>
<span class="full-screen" @click="fullScreen">
<img src="../../assets/video/content_ic_increase.svg" alt>
</span>
</div>
</div>
<!-- 錯(cuò)誤彈窗 -->
<div class="error" v-show="state.isError">
<p class="lose">視頻加載失敗</p>
<p class="retry" @click="retry">點(diǎn)擊重試</p>
</div>
</div>
</template>播放器初始化
這里有個(gè)坑點(diǎn)我就是當(dāng)父元素隱藏即display:none時(shí),getBoundingClientRect()是獲取不到元素的尺寸數(shù)值的,后來(lái)查了MDN文檔,按上面說(shuō)的改了一下border也沒(méi)有用,最后嘗試設(shè)置元素visibility屬性為hidden后發(fā)現(xiàn)就可以獲取了.
getBoundingClientRect() : 返回元素的大小及其相對(duì)于視口的位置, 這個(gè)api在計(jì)算元素相對(duì)位置的時(shí)候挺好用的.
init() {
// 初始化video,獲取video元素
this.$video = this.$el.getElementsByTagName("video")[0];
this.initPlayer();
},
// 初始化播放器容器, 獲取video-player元素
// getBoundingClientRect()以client可視區(qū)的左上角為基點(diǎn)進(jìn)行位置計(jì)算
initPlayer() {
const $player = this.$el;
const $progress = this.$el.getElementsByClassName("progress")[0];
// 播放器位置
this.player.$player = $player;
this.progressBar.$progress = $progress;
this.player.pos = $player.getBoundingClientRect();
this.progressBar.pos = $progress.getBoundingClientRect()
this.video.progress.width = Math.round($progress.getBoundingClientRect().width);
},播放 && 暫停點(diǎn)擊
我這里把事件監(jiān)聽(tīng)都放在只有滿足正在播放視頻才開(kāi)始事件監(jiān)聽(tīng); 感覺(jué)原生監(jiān)聽(tīng)和vue方式的監(jiān)聽(tīng)混合在一起寫(xiě)有點(diǎn)別扭...emem...這里需要對(duì)this.$video.play()做一個(gè)異常處理,防止video剛開(kāi)始加載的時(shí)候失敗,如果視頻鏈接出錯(cuò),play方法調(diào)用不了會(huì)拋錯(cuò),后面我也用了video的error事件去監(jiān)聽(tīng)播放時(shí)的錯(cuò)誤
// 點(diǎn)擊播放 & 暫停按鈕
clickPlayBtn() {
if (this.state.isLoading) return;
this.isFirstTouch = false;
this.state.playing = !this.state.playing;
this.state.isEnd = false;
if (this.$video) {
// 播放狀態(tài)
if (this.state.playing) {
try {
this.$video.play();
this.isPauseTouch = false;
// 監(jiān)聽(tīng)緩存進(jìn)度
this.$video.addEventListener("progress", e => {
this.getLoadTime();
});
// 監(jiān)聽(tīng)播放進(jìn)度
this.$video.addEventListener(
"timeupdate",
throttle(this.getPlayTime, 100, 1)
);
// 監(jiān)聽(tīng)結(jié)束
this.$video.addEventListener("ended", e => {
// 重置狀態(tài)
this.state.playing = false;
this.state.isEnd = true;
this.state.controlBtnShow = true;
this.video.displayTime = "00:00";
this.video.progress.current = 0;
this.$video.currentTime = 0;
});
} catch (e) {
// 捕獲url異常出現(xiàn)的錯(cuò)誤
}
}
// 停止?fàn)顟B(tài)
else {
this.isPauseTouch = true;
this.$video.pause();
}
}
},視頻控制條顯示和隱藏
這里需要加兩個(gè)開(kāi)關(guān); 首次觸屏和暫停觸屏; 做一下顯示處理即可
// 觸碰播放區(qū)
touchEnterVideo() {
if (this.isFirstTouch) return;
if (this.hideTimer) {
clearTimeout(this.hideTimer);
this.hideTimer = null;
}
this.state.controlBtnShow = true;
this.state.controlBarShow = true;
},
// 離開(kāi)播放區(qū)
touchLeaveVideo() {
if (this.isFirstTouch) return;
if (this.hideTimer) {
clearTimeout(this.hideTimer);
}
// 暫停觸摸, 不隱藏
if (this.isPauseTouch) {
this.state.controlBtnShow = true;
this.state.controlBarShow = true;
} else {
this.hideTimer = setTimeout(() => {
this.state.controlBarShow = false;
// 加載中只顯示loading
if (this.state.isLoading) {
this.state.controlBtnShow = true;
} else {
this.state.controlBtnShow = false;
}
this.hideTimer = null;
}, 3000);
}
},視頻錯(cuò)誤處理和等待處理
這里錯(cuò)誤直接用error事件, 加載中用stalled事件來(lái)監(jiān)聽(tīng)視頻阻塞狀態(tài),等待數(shù)據(jù)加載用的waiting事件; 顯示對(duì)應(yīng)的loading動(dòng)畫(huà)即可
// loading動(dòng)畫(huà)
@keyframes rotate {
0% {
transform: rotate(0deg);
}
50% {
transform: rotate(180deg);
}
100% {
transform: rotate(360deg);
}
}
.loader {
width: 58px;
height: 58px;
background: rgba(15, 16, 17, 0.3);
border-radius: 50%;
position: relative;
.ball-clip-rotate {
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
> div {
width: 15px;
height: 15px;
border-radius: 100%;
margin: 2px;
animation-fill-mode: both;
border: 2px solid #fff;
border-bottom-color: transparent;
height: 26px;
width: 26px;
background: transparent;
display: inline-block;
animation: rotate 0.75s 0s linear infinite;
}
}
}播放時(shí)間設(shè)置
基本就是video對(duì)象的currentTime和duration這兩個(gè)屬性; 這里注意下視頻如果沒(méi)有設(shè)置預(yù)加載屬性preload的話,在video元素初始化的時(shí)候是獲取不到duration的...那你只能在播放的時(shí)候去拿了.
// 獲取播放時(shí)間
getPlayTime() {
const percent = this.$video.currentTime / this.$video.duration;
this.video.progress.current = Math.round(
this.video.progress.width * percent
);
// 賦值時(shí)長(zhǎng)
this.video.totalTime = timeParse(this.$video.duration);
this.video.displayTime = timeParse(this.$video.currentTime);
},
// 獲取緩存時(shí)間
getLoadTime() {
// console.log('緩存了...',this.$video.buffered.end(0));
this.video.loaded =
(this.$video.buffered.end(0) / this.$video.duration) * 100;
},手動(dòng)滑動(dòng)進(jìn)度條控制
這里直接用touch事件即可; 注意touchend中使用e.changedTouches;因?yàn)楫?dāng)手指離開(kāi)屏幕，touches和targetTouches中對(duì)應(yīng)的元素會(huì)同時(shí)移除，而changedTouches仍然會(huì)存在元素。
// 手動(dòng)調(diào)節(jié)播放進(jìn)度
moveStart(e) {},
moveIng(e) {
// console.log("觸摸中...");
let currentX = e.targetTouches[0].pageX;
let offsetX = currentX - this.progressBar.pos.left;
// 邊界檢測(cè)
if (offsetX <= 0) {
offsetX = 0
}
if (offsetX >= this.video.progress.width) {
offsetX = this.video.progress.width
}
this.video.progress.current = offsetX;
let percent = this.video.progress.current / this.video.progress.width;
this.$video.duration && this.setPlayTime(percent, this.$video.duration)
},
moveEnd(e) {
// console.log("觸摸結(jié)束...");
let currentX = e.changedTouches[0].pageX;
let offsetX = currentX - this.progressBar.pos.left;
this.video.progress.current = offsetX;
// 這里的offsetX都是正數(shù)
let percent = offsetX / this.video.progress.width;
this.$video.duration && this.setPlayTime(percent, this.$video.duration)
},
// 設(shè)置手動(dòng)播放時(shí)間
setPlayTime(percent, totalTime) {
this.$video.currentTime = Math.floor(percent * totalTime);
},全屏功能
這個(gè)功能在手機(jī)上會(huì)有寫(xiě)兼容性問(wèn)題...有待完善
// 設(shè)置全屏
fullScreen() {
console.log('點(diǎn)擊全屏...');
if (!this.state.fullScreen) {
this.state.fullScreen = true;
this.$video.webkitRequestFullScreen();
} else {
this.state.fullScreen = false;
document.webkitCancelFullScreen();
}坑點(diǎn)匯總
1.視頻預(yù)加載才能獲取時(shí)長(zhǎng)
需要設(shè)置預(yù)加載 preload="auto"
2.Element.getBoundingClientRect()方法返回元素的大小及其相對(duì)于視口的位置
父元素設(shè)置display:none時(shí)獲取不到尺寸數(shù)據(jù)民謠改為visibility:hidden
3.play()方法異常捕獲
try{ xxxxx.play } catch(e) { yyyyyy }
4.安卓手機(jī)video兼容性處理, 視頻播放時(shí)層級(jí)置頂,會(huì)影響全局彈出層樣式
我這里做的處理是當(dāng)彈出層出現(xiàn)時(shí)把視頻給隱藏掉(寬高為0,或者直接去掉),用封面圖來(lái)替代
5.ios下全屏處理
設(shè)置相應(yīng)屬性即可, playsinline
代碼直通車: https://github.com/appleguardu/vue-h5-video
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