この記事の例では、JavaScript で実装されたマルチブロック画像の切り取り効果について説明します。皆さんの参考に共有してください。具体的な実装方法は以下の通りです。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="ru"> <head> <title></title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <style type="text/css"> .line{ display:none; z-index:1; left:0; top:0; position:absolute; } #line1{ display:block; } .container{ position:relative; width:564px; height:294px; overflow:hidden; } .border{ border:5px solid #000; } .corner{ position:absolute; width:282px; height:147px; background:#ccc; overflow:hidden; } .leftTop,.inLeftTop{ position:absolute; left:0; top:0; right:auto; bottom:auto; } .rightTop,.inRightTop{ position:absolute; right:0; top:0; left:auto; bottom:auto; } .rightBottom,.inRightBottom{ position:absolute; right:0; bottom:0; top:auto; left:auto; } .leftBottom,.inLeftBottom{ position:absolute; left:0; bottom:0; top:auto; right:auto; } </style> </head> <body> <script src="jquery-1.6.2.min.js" type="text/javascript"></script> <script type="text/javascript"> function crossLine(container,option,callback){ var lineX=$("<div style='width:2000px;height:4px;overflow:hidden;position:absolute;background:#FACC41;left:0;top:0;z-index:1'></div>"); var lineY=$("<div style='width:4px;height:2000px;overflow:hidden;position:absolute;background:#FACC41;left:0;top:0;z-index:1'></div>"); var _option={ "display":"none", "targetPosX":container.width()/2-2, "targetPosY":container.height()/2-2, "time":500, "freq":10 }; $.extend(_option,option); option=_option; var targetPosX=option.targetPosX; var targetPosY=option.targetPosY; var time=option.time; var freq=option.freq; times=time/freq; container.append(lineX).append(lineY); //开始运动 var lxt=lineX.position().top; var lyl=lineY.position().left; xPerTime=targetPosX/times; yPerTime=targetPosY/times; var count=0; var si=setInterval(function(){ count++; if(count>=times){ clearInterval(si); if(typeof(callback)=="function"){ callback(); } if(option.display=="none"){ lineX.remove(); lineY.remove(); } } if(lxt+yPerTime<=targetPosY){ lxt += yPerTime; lineX.css("top",lxt); }else{ lxt=targetPosY; lineX.css("top",targetPosY); } if(lyl+xPerTime<=targetPosX){ lyl += xPerTime; lineY.css("left",lyl); }else{ lyl=targetPosX; lineY.css("left",targetPosX); } },freq); } function picSplit(line1,line2,container,option){ //begin line1.css("z-index",2); /* var targetX=282; var targetY=147; */ var _option={ "targetX":container.width()/2, "targetY":container.height()/2, "time":500, "freq":10 }; $.extend(_option,option); option=_option; var targetX=option.targetX; var targetY=option.targetY; var containerWidth=container.width(); var containerHeight=container.height(); /* *复制四个,放入四个容器,置于四角,然后移动 */ //div0-4 容器,放置于四角 var div0=$("<div></div>").css({"position":"absolute","left":0,"top":0,"right":"auto","bottom":"auto","width":targetX,"height":targetY,"z-index":"2","overflow":"hidden"}).appendTo(container); var div1=$("<div></div>").css({"position":"absolute","left":targetX,"top":0,"right":"auto","bottom":"auto","width":containerWidth-targetX,"height":targetY,"z-index":"2","overflow":"hidden"}).appendTo(container); var div2=$("<div></div>").css({"position":"absolute","left":targetX,"top":targetY,"right":"auto","bottom":"auto","width":targetX,"height":containerHeight-targetY,"z-index":"2","overflow":"hidden"}).appendTo(container); var div3=$("<div></div>").css({"position":"absolute","left":0,"top":targetY,"right":"auto","bottom":"auto","width":targetX,"height":containerHeight-targetY,"z-index":"2","overflow":"hidden"}).appendTo(container); //tempL0-4复制出来的层 var tempL0=line1.clone().css({"position":"absolute","left":0,"top":0,"right":"auto","bottom":"auto","z-index":"2"}).appendTo(div0); var tempL1=line1.clone().css({"position":"absolute","left":-targetX,"top":0,"right":"auto","bottom":"auto","z-index":"2"}).appendTo(div1); var tempL2=line1.clone().css({"position":"absolute","left":-targetX,"top":-targetY,"right":"auto","bottom":"auto","z-index":"2"}).appendTo(div2); var tempL3=line1.clone().css({"position":"absolute","left":0,"top":-targetY,"right":"auto","bottom":"auto","z-index":"2"}).appendTo(div3); line1.css("display","none"); line2.css("display","block"); //开始运动 var time=option.time; var freq=option.freq; var times=time/freq; var count=0; var xLeftPerTime=3; var xRightPerTime=3; var yTopPerTime=3; var yBottomPerTime=3; var l0=div0.position().left; var t0=div0.position().top; var l1=div1.position().left; var t1=div1.position().top; var l2=div2.position().left; var t2=div2.position().top; var l3=div3.position().left; var t3=div3.position().top; var si=setInterval(function(){ count++; if(count>=times){ clearInterval(si); div0.remove(); div1.remove(); div2.remove(); div3.remove(); } l0=l0-xLeftPerTime; t0=t0-yTopPerTime; l1=l1+xRightPerTime; t1=t1-yTopPerTime; l2=l2+xRightPerTime; t2=t2+yBottomPerTime; l3=l3-xLeftPerTime; t3=t3+yBottomPerTime; div0.css("left",(l0-xLeftPerTime)+"px"); div0.css("top",(t0-yTopPerTime)+"px"); div1.css("left",(l1+xRightPerTime)+"px"); div1.css("top",(t1-yTopPerTime)+"px"); div2.css("left",(l2+xRightPerTime)+"px"); div2.css("top",(t2+yBottomPerTime)+"px"); div3.css("left",(l3-xLeftPerTime)+"px"); div3.css("top",(t3+yBottomPerTime)+"px"); },freq); } </script> <div class="container" id="container"> <div class="line" id="line1"><img src="http://static.house.sina.com.cn/apileju/cms/110819/1820432103.jpg" alt="" /></div> <div class="line" id="line2"><img src="http://static.house.sina.com.cn/apileju/cms/110819/1110183294.jpg" alt="" /></div> </div> <input type="button" value="GO" onclick="javascript:go()" /> <script type="text/javascript"> var line1=$("#line1"); var line2=$("#line2"); line1.css("display","block"); var container=$("#container"); function go(){ var option={"display":"none"}; crossLine(container,option,gopicSplit); } var container=$("#container"); function gopicSplit(){ picSplit(line1,line2,container); } </script> </body> </html>
この記事が皆様の JavaScript プログラミング設計に役立つことを願っています。