好长时间以来，自己就有个想法为自己写一个音乐播放器小程序，以方便自己的使用，找网上的好多API，找不到，想抓接口，好多大厂都用了加密。结果自己仅仅整了点本地的数据。
只介绍一些具体的方法：
// 解码>>中文
reconvert: function (str) {
str = str.replace(/(\\u)(\w{1,4})/gi, function ($0) {
return (String.fromCharCode(parseInt((escape($0).replace(/(%5Cu)(\w{1,4})/g, "$2")), 16)));
});
str = str.replace(/(&#x)(\w{1,4});/gi, function ($0) {
return String.fromCharCode(parseInt(escape($0).replace(/(%26%23x)(\w{1,4})(%3B)/g, "$2"), 16));
});
str = str.replace(/(&#)(\d{1,6});/gi, function ($0) {
return String.fromCharCode(parseInt(escape($0).replace(/(%26%23)(\d{1,6})(%3B)/g, "$2")));
});
return str;
},
// 解析歌词的方法
parseLyric: function (lrc) {
var lyrics = lrc.split("\n");
var lrcObj = {};
for (var i = 0; i < lyrics.length; i++) {
var lyric = decodeURIComponent(lyrics[i]);
var timeReg = /\[\d*:\d*((\.|\:)\d*)*\]/g;
var timeRegExpArr = lyric.match(timeReg);
if (!timeRegExpArr)
continue;
var clause = lyric.replace(timeReg, '');
if (clause.length > 0) {
for (var k = 0, h = timeRegExpArr.length; k < h; k++) {
var t = timeRegExpArr[k];
var min = Number(String(t.match(/\[\d*/i)).slice(1)),
sec = Number(String(t.match(/\:\d*/i)).slice(1));
var time = min * 60 + sec;
lrcObj[time] = clause;
}
}
}
return lrcObj;
},
// 转换时间格式
timeToString: function (duration) {
var str = '';
var minute = parseInt(duration / 60) < 10
? ('0' + parseInt(duration / 60))
: (parseInt(duration / 60));
var second = duration % 60 < 10
? ('0' + duration % 60)
: (duration % 60);
str = minute + ':' + second;
return str;
},
2.播放控制
// 播放状态控制
songPlay: function () {
clearInterval(timer);
var timer = setInterval(function () {
// 获取后台音乐播放状态
wx.getBackgroundAudioPlayerState({
success: function (res) {
// 播放状态 1表示播放中
if (res.status == 1) {
that.setData({
isPlaying: true,
songState: {
progress: res.currentPosition / res.duration * 100,
currentPosition: that.timeToString(res.currentPosition),
duration: that.timeToString(res.duration)
}
});
var i = that.data.currentIndex
if (i < that.data.lyric.length) {
if (res.currentPosition - 4 >= parseInt(that.data.lyric[i][0])) {
that.setData({
currentIndex: i + 1
})
}
}
if (that.data.currentIndex >= 5) {
that.setData({
scrollTop: (that.data.currentIndex - 5) * 20,
})
}
} else {
that.setData({ isPlaying: false });
clearInterval(timer);
}
}
});
}, 1000);
},
具体项目我已经放https://github.com/dt8888/JokeProject，请去下载参考！
专栏作家
honey缘木鱼。小程序社区博主，坚持原创分享技术博文。
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原文地址：音乐播放小程序demo-微信小程序联盟/博主专区-微信小程序开发社区-微信小程序联盟
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