我在使用jPlayer 时遇到了一个问题,我在搜索了几个地方后认为它在这里会很常用,而且肯定有人会遇到类似的问题。
我正在使用 jPlayer 播放音频文件,我的用户希望能够通过特定的热键快进和快退。我注意到 jPlayer 不提供开箱即用的此功能(它仅通过单击当前进度条来处理快进和快退)
理想情况下 - 只需一次按键即可切换快进(或倒带)。当再次按下相同的键时,音频文件将根据当前位置开始播放。
我决定实施我自己的解决方案,目前似乎工作得很好。我想我会分享它以防其他人遇到这样的问题。
原谅粗暴的执行。这只是一个概念证明:
必要的Javascript:
//Handles the key down event (so the user can hold a key down to continue)
$(document).keydown(function (e) {
//Rewind
if (e.keyCode == 37 && (!rewinding)) {
rewinding = true;
//Pause the player
$("#player").jPlayer("pause");
RewindTrack();
rwaction = window.setInterval(function () { RewindTrack() }, 500);
}
else if (e.keyCode == 39 && (!fastforward)) {
fastforward = true;
//Pause the player
$("#player").jPlayer("pause");
FastforwardTrack();
ffaction = window.setInterval(function () { FastforwardTrack() }, 500);
}
});
//Ends the action
$(document).keyup(function (e) {
//Rewind
if (e.keyCode == 37) {
rewinding = false;
window.clearInterval(rwaction);
$("#player").jPlayer("pause");
}
else if (e.keyCode == 39) {
fastforward = false;
window.clearInterval(ffaction);
$("#player").jPlayer("pause");
}
});
//Related function
function GetPlayerProgress() {
return ($('.jp-play-bar').width() / $('.jp-seek-bar').width() * 100);
}
//Handles rewinding
function RewindTrack() {
//Get current progress and decrement
var currentProgress = GetPlayerProgress();
//Rewinds 10% of track length
var futureProgress = currentProgress - 10;
//If it goes past the starting point - stop rewinding and pause
if (futureProgress <= 0) {
rewinding = false;
window.clearInterval(rwaction);
$("#player").jPlayer("pause", 0);
}
//Continue rewinding
else {
$("#player").jPlayer("playHead", parseInt(futureProgress, 10));
}
}
//Fast forwards the track
function FastforwardTrack() {
//Get current progress and increment
var currentProgress = GetPlayerProgress();
//Fast forwards 10%
var futureProgress = currentProgress + 10;
//If the percentage exceeds the max - stop fast forwarding at the end.
if (futureProgress >= 100) {
fastforward = false;
window.clearInterval(ffaction);
$("#player").jPlayer("playHead", parseInt($('.jp-duration').text().replace(':', '')));
}
else {
$("#player").jPlayer("playHead", parseInt(futureProgress, 10));
}
}
工作演示(使用左箭头快退,右箭头快进)