我使用 jPlayer 遇到了一个问题,我在搜索了几个地方之后想到它会在这里得到足够的使用,而且有人肯定会遇到类似问题问题。
我正在使用jPlayer播放音频文件,我的用户希望通过特定的热键快进和快退功能。我注意到jPlayer不提供开箱即用的功能(它只通过点击当前的进度条来处理快进和快退)
理想情况下 - 所有必要的都是单个按键来切换快进(或倒带)。再次按下相同的键时,音频文件将根据当前位置开始播放。
答案 0 :(得分:4)
我决定实现我自己的解决方案,目前似乎工作正常。我想如果其他人遇到这样的问题我会分享它。
原谅原油的实施。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));
}
}
Working Demo (使用向左箭头表示快退,向右表示快进)