一、在app.js利用官方方法获取设备信息，将获取到的screenHeight、windowHeight度量单位统一由rpx换算为px
注：官方文档给出 【rpx换算px (屏幕宽度/750) 】【 px换算rpx (750/屏幕宽度)】
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月份：2018年7月
H5背景音乐自动播放(兼容微信IOS，进程后台切换自动停止播放，本文例子为Vue写法)
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<template> <audio src="./static/music.mp3" id="bgMusic" preload="auto" loop></audio> <div class="bgMusicBtn" @click="bgMusicPlayOrPause('bgMusic')"> <img :src="playFlag ? playImg : pauseImg" :class="{rotate: playFlag}"> </div> </template> export default { data() { return { playFlag: true, playImg: require('../../static/play.png'), pauseImg: require('../../static/pause.png'), clickMusicBtn: false } }, mounted() { this.audioAutoPlay('bgMusic'); document.addEventListener("visibilitychange", (e) => { // 兼容ios微信手Q if (this.clickMusicBtn) { // 点击了关闭音乐按钮 if (this.playFlag) { this.audioAutoPlay('bgMusic'); this.playFlag = true; } else { this.audioPause('bgMusic'); this.playFlag = false; } text.innerHTML = e.hidden; if (e.hidden) { // 网页被挂起 this.audioAutoPlay('bgMusic'); this.playFlag = true; } else { // 网页被呼起 this.audioPause('bgMusic'); this.playFlag = false; } } else { // 未点击关闭音乐按钮 if (this.playFlag) { this.audioPause('bgMusic'); this.playFlag = false; } else { this.audioAutoPlay('bgMusic'); this.playFlag = true; } text.innerHTML = e.hidden; if (e.hidden) { // 网页被挂起 this.audioPause('bgMusic'); this.playFlag = false; } else { // 网页被呼起 this.audioAutoPlay('bgMusic'); this.playFlag = true; } } }); }, methods: { bgMusicPlayOrPause(id) { this.clickMusicBtn = !this.clickMusicBtn; if (this.playFlag) { this.audioPause(id); this.playFlag = false; } else { this.audioAutoPlay(id); this.playFlag = true; } }, audioPause(id) { var audio = document.getElementById(id); audio.pause(); document.addEventListener("WeixinJSBridgeReady", function () { audio.pause(); }, false); document.addEventListener('YixinJSBridgeReady', function () { audio.pause(); }, false); }, audioAutoPlay(id) { var audio = document.getElementById(id); audio.play(); document.addEventListener("WeixinJSBridgeReady", function () { audio.play(); }, false); document.addEventListener('YixinJSBridgeReady', function () { audio.play(); }, false); } } } |