基于jQuery实现弹幕APP
今天闲着无聊,写了个弹幕APP,主要实现以下几个功能:
1.点击“弹幕发射”或回车可以输出弹幕到弹幕墙上。
2.弹幕的运行轨迹是从弹幕墙的最右边到最左边,Y轴的数值在弹幕墙的高度内随机,颜色HEX随机,速度随机。
3.右侧的表格可以储存弹幕内容以及弹幕的发射时间,越靠近现在的越靠前。
4.点击“清除弹幕”可以把弹幕墙内的所有弹幕清除掉,但不会影响到表格中的数据。
5.如果弹幕长度过长(我设置的是6个字符),则超过规定长度之外的弹幕内容都会由“...”代替,并放入表格中。但弹幕墙中的内容依然是完整的。
HTML代码:
<div class="frame"> <div class="row"> <div class="col-xs-8 col-sm-8 col-md-8 col-lg-8 danmu-box-frame"> <div class="danmu-box"> </div> </div> <div class="col-xs-4 col-sm-4 col-md-4 col-lg-4 danmu-table-frame"> <table class="table .table-condensed danmu-table"> <thead> <tr> <th> 弹幕内容 </th> <th> 弹幕时间 </th> </tr> </thead> <tbody> </tbody> </table> </div> </div> <div class="danmu-form"> <form class="form-inline"> <input type="text" class="form-control" placeholder="开始吐槽!"> <button type="button" class="btn btn-primary shoot"> 发射弹幕! </button> <button type="button" class="btn btn-danger clear"> 清空弹幕 </button> </form> </div> </div> <hr> <footer> Designed By <a href="http://blog.csdn.net/alenhhy" target="_blank"> Alen Hu </a> </footer>
*使用了Bootstrap3框架。
JQuery部分:
$(document).ready(function() { $(".shoot").on("click", startDanmu); $("form").keypress(function(event) { if (event.keyCode === 13) { event.preventDefault(); startDanmu(); } }); $(".clear").on("click", clearDanmu); }); //get random number in certain range function RandomNum(Min, Max) { var Range = Max - Min; var Rand = Math.random(); var num = Min + Math.round(Rand * Range); return num; } //time number add 0 before if <10 function plusZero(x) { if (x < 10) { x = "0" + x; } else { x = x; } return x; } //start danmu function startDanmu() { var message = $("input"); var messageVal = message.val(); var danmuMessage = "<span class='danmu-message'>" + messageVal + "</span>"; //get random color HEX //u can also save the colors u want by array var color = RandomNum(100000, 999999); //get random danmu speed var speed = RandomNum(10000, 20000); //get random position Y //danmu box height is 450, we set the danmu position Y max 400 in case it blocks the subtitle var positionY = RandomNum(50, 400); if (messageVal.length > 0) { //insert danmu message into danmu box $(".danmu-box").prepend(danmuMessage); //have to use first() cuz we prepend the message, u can try what's gonna happen if no first() //set it's style $(".danmu-message").first().css({ "right": "0", "top": positionY, "color": "#" + color }); //set it's animation //from right 0 to left 0 //hide it after move $(".danmu-message").first().animate({ left: '0px', }, speed, function() { $(this).fadeOut(); }); //get danmu time var time = new Date(); var month = time.getMonth() + 1; var day = time.getDay(); var hour = time.getHours(); var minute = time.getMinutes(); var danmuTime = plusZero(month) + "-" + plusZero(day) + " " + plusZero(hour) + ":" + plusZero(minute); //insert danmu message to table if (messageVal.length > 6) { messageVal = messageVal.substring(0, 6) + "..."; } var messageToTable = "<tr><td>" + messageVal + "</td><td>" + danmuTime + "</td></tr>"; $(".danmu-table > tbody").prepend(messageToTable); } else {} //empty the input message.val(""); } //clear danmu box function clearDanmu() { $(".danmu-box").html(""); }
DEMO在这儿,欢迎来FORK:Danmu APP。
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