jq跑马灯效果
Posted 胡琦
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这几天公司产品有个无缝循环滚动的广告跑马灯要做,最开始想到的是<marquee>标签,但在PC端正常,在安卓广告屏上却怎么都跑不动,后来用的css3的animation,结果也是PC端及其他一些手机正常,但一到安卓广告屏上就跑不动了;后来领导找了个jQuery插件,经测试,完美运行。
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>滚动文字jquery插件</title> /** * author ormin * http://www.cnblogs.com/kangaoxiaoshi/p/5431870.html * http://www.cnblogs.com/yexiaochai/p/3759959.html * http://www.cnblogs.com/axl234/p/5780432.html */ <script src="http://libs.baidu.com/jquery/1.6.4/jquery.min.js"></script> <script type="text/javascript"> (function($) { $.fn.extend({ roll: function(options) { var defaults = { speed:1 }; var options = $.extend(defaults, options); var speed=(document.all) ? options.speed : Math.max(1,options.speed-1); if ($(this) == null) return ; var $container = $(this); var $content = $("#content"); var init_left = $container.width(); $content.css({left:parseInt(init_left) + "px"}); var This = this; var time = setInterval(function(){This.move($container,$content,speed);},20); //setInterval会改变this指向,即使加了This=this,也要用匿名函数封装,这里调试了n久 $container.bind("mouseover",function() { clearInterval(time); }); $container.bind("mouseout",function() { time = setInterval(function(){This.move($container,$content,speed);},20); }); return this; }, move:function($container,$content,speed){ var container_width = $container.width(); var content_width = $content.width(); if (parseInt($content.css("left")) + content_width > 0) { $content.css({left:parseInt($content.css("left")) - speed + "px"}); } else { $content.css({left:parseInt(container_width) + "px"}); } } }); })(jQuery); //插件的调用$("#yourId").roll({speed:#yourSpeed}); $(document).ready( function(){ $("#container").roll({speed:8}); } ); </script> <style type="text/css"> #container{ background:#CCCCCC; position:relative; overflow:hidden; /*这个东西折腾了很久才弄出来*/ width:550px; height:80px; line-height:80px; margin:100px; } #content{ position:absolute; left:0; top:0; white-space:nowrap; /*重要,不然文字显示效果不好*/ } </style> </head> <body> <div id="container"> <div id="content" style="color:red;font-size:80px;">This is a roll word test,created by Baidu FE.</div> </div> </body> </html>
jQuery部分(使用时先引用jQuery插件)
(function($) { $.fn.extend({ roll: function(options) { var defaults = { speed:1 }; var options = $.extend(defaults, options); var speed=(document.all) ? options.speed : Math.max(1,options.speed-1); if ($(this) == null) return ; var $container = $(this); var $content = $("#content"); var init_left = $container.width(); $content.css({left:parseInt(init_left) + "px"}); var This = this; var time = setInterval(function(){This.move($container,$content,speed);},20); //setInterval会改变this指向,即使加了This=this,也要用匿名函数封装,这里调试了n久 $container.bind("mouseover",function() { clearInterval(time); }); $container.bind("mouseout",function() { time = setInterval(function(){This.move($container,$content,speed);},20); }); return this; }, move:function($container,$content,speed){ var container_width = $container.width(); var content_width = $content.width(); if (parseInt($content.css("left")) + content_width > 0) { $content.css({left:parseInt($content.css("left")) - speed + "px"}); } else { $content.css({left:parseInt(container_width) + "px"}); } } }); })(jQuery);
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