Javascript 使用for循环连续播放音频文件
我有以下HTML代码:Javascript 使用for循环连续播放音频文件,javascript,jquery,html,Javascript,Jquery,Html,我有以下HTML代码: <div id="1">Paragraph 1</div> <div id="2">Paragraph 2</div> <div id="3">Paragraph 3</div> <div id="4">Paragraph 4</div> <div id="5">Paragraph 5</div> <span id="play">play&
<div id="1">Paragraph 1</div>
<div id="2">Paragraph 2</div>
<div id="3">Paragraph 3</div>
<div id="4">Paragraph 4</div>
<div id="5">Paragraph 5</div>
<span id="play">play</span>
我想做的是,当我点击播放时,第1段的音频播放,播放时,突出显示这个div,然后在后台加载下一段音频,这样音频就不会停止加载,而是无缝地过渡到下一段。现在,当播放完第一段的音频后,取消高亮显示该div,然后播放下一段的音频并高亮显示,然后重复该过程,直到循环完成
我认为通过获取音频文件的持续时间并在for循环中播放所有音频,这将很容易做到。但这不起作用:
$('#play').on("click",function(){
var total_paragraphs = 7;
function playAudio() {
for (var i = 1; i <= total_paragraphs; i++) {
var audio = new Audio("paragraphs/"+i+".mp3");
var sec, ms;
audio.addEventListener("loadedmetadata", function(_event) {
seconds = audio.duration.toFixed(2),
milliseconds = audio.duration.toFixed(2)*1000;
});
$("#"+i).css("background-color", "red");
audio.play();
audio.onended = function() {
$("#"+i).css("background-color", "white");
};
}
}
playAudio();
});
当我点击播放时,所有音频都同时播放。似乎所有的循环都是同时执行的。我想用音频文件的持续时间来延迟循环,但这也不行
我相信有很多更简单的方法来做我想做的事。任何帮助都将不胜感激 那么:
html
jquery
_play = (totalParagraphs, currentParagraph) =>
{
const paragraph = $(`.paragraph:nth-child(${currentParagraph})`)
if (currentParagraph <= totalParagraphs)
{
paragraph.css('background', 'coral');
const audio = new Audio(`paragraphs/${currentParagraph}.mp3`)
audio.play()
audio.onended = () => {
paragraph.css('background', 'white')
_play(totalParagraphs, currentParagraph + 1)
}
}
}
$('#play').on('click', () => {
let totalParagraphs = $('.paragraph').length,
currentParagraph = 1
_play(totalParagraphs, currentParagraph)
})
audio.oned回调中的i始终为8。类似地,loadedmetadata回调中的音频将始终是new AudioParagents/7。mp3@PatrickRoberts那么,有什么解决方案吗?这实际上几乎是完美的,除了像我说的,过渡不是无缝的,因为它必须在前一个音频完成后才加载新的音频。我想要的是过渡应该是无缝的,也就是说,它们不应该看起来像是不同的音频。我认为如果在后台加载下一个音频,这是可以实现的。有什么想法吗?事实上,我现在很满意。不过,你能帮我设置一个暂停功能吗?因为这只是一个游戏功能。
_play = (totalParagraphs, currentParagraph) =>
{
const paragraph = $(`.paragraph:nth-child(${currentParagraph})`)
if (currentParagraph <= totalParagraphs)
{
paragraph.css('background', 'coral');
const audio = new Audio(`paragraphs/${currentParagraph}.mp3`)
audio.play()
audio.onended = () => {
paragraph.css('background', 'white')
_play(totalParagraphs, currentParagraph + 1)
}
}
}
$('#play').on('click', () => {
let totalParagraphs = $('.paragraph').length,
currentParagraph = 1
_play(totalParagraphs, currentParagraph)
})