您好,登錄后才能下訂單哦!
這篇文章主要介紹“javascript如何實現簡單鐘表效果”,在日常操作中,相信很多人在javascript如何實現簡單鐘表效果問題上存在疑惑,小編查閱了各式資料,整理出簡單好用的操作方法,希望對大家解答”javascript如何實現簡單鐘表效果”的疑惑有所幫助!接下來,請跟著小編一起來學習吧!
JavaScript主要用來向HTML頁面添加交互行為。
2.JavaScript可以直接嵌入到HTML頁面,但寫成單獨的js文件有利于結構和行為的分離。 3.JavaScript具有跨平臺特性,在絕大多數瀏覽器的支持下,可以在多種平臺下運行。
復制可直接使用
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <style> h2 { text-align: center; } div { width: 400px; height: 400px; margin: 10px auto; padding: 0; } </style> </head> <body> <h2>手繪時鐘</h2> <hr /> <div> <canvas id="c1" width="400px" height="400px"> </canvas> </div> <script type="text/javascript"> var clock = document.getElementById("c1").getContext("2d"); // var clock = $("#huabu").get(0).getContext("2d"); //$中使用畫布 function play() { clock.clearRect(0, 0, 400, 400); clock.save(); clock.translate(200, 200); //把畫布中心轉移到canvas中間 biaopan(); run(); clock.restore(); } setInterval(function() { play(); }, 1000); function biaopan() { //繪制表盤 clock.strokeStyle = " #9932CC"; clock.lineWidth = 5; clock.beginPath(); clock.arc(0, 0, 195, 0, 2 * Math.PI); clock.stroke(); //刻度(小時) clock.strokeStyle = "#9932CC"; clock.lineWidth = 5; for(var i = 0; i < 12; i++) { clock.beginPath(); clock.moveTo(0, -190); clock.lineTo(0, -170); clock.stroke(); clock.rotate(2 * Math.PI / 12); } //刻度(分鐘) clock.strokeStyle = "#9932CC"; clock.lineWidth = 3; for(var i = 0; i < 60; i++) { clock.beginPath(); clock.moveTo(0, -190); clock.lineTo(0, -180); clock.stroke(); clock.rotate(2 * Math.PI / 60); } //繪制文字 clock.textAlign = "center"; clock.textBaseline = "middle"; clock.fillStyle = "#6495ED"; clock.font = "20px 微軟雅黑" for(var i = 1; i < 13; i++) { clock.fillText(i,Math.sin(2*Math.PI /12*i)*150,Math.cos(2*Math.PI/12*i)*-150); } } function run() { var date = new Date(); var h = date.getHours(); var m = date.getMinutes(); var s = date.getSeconds(); // if(h > 12) { // h = h - 12; // } //日期 var week = date.getDay(); var month = date.getMonth() + 1; var day = date.getDate(); switch (week){ case 1: week = "星期一"; break; case 2: week = "星期二"; break; case 3: week = "星期三"; break; case 4: week = "星期四"; break; case 5: week = "星期五"; break; case 6: week = "星期六"; break; default: week = "星期天"; break; } clock.save(); clock.textAlign = "center"; clock.textBaseline = "middle"; clock.fillStyle = "black"; clock.font = "16px" clock.fillText(week,-2,-118); clock.fillText(month+" 月",-90,2); clock.fillText(day+" 號",90,0); clock.stroke(); clock.restore(); //時針 //分針60格 分針5格 clock.save(); clock.rotate(2 * Math.PI / 12 * h + (2 * Math.PI / 60 * m + 2 * Math.PI / 60 * s / 60) / 12); clock.strokeStyle = "black"; clock.lineWidth = 7; clock.beginPath(); clock.moveTo(0, 0); clock.lineTo(0, -80); clock.lineCap = "round"; clock.stroke(); clock.restore(); //分針 //秒針60格 分針一格 clock.save(); clock.beginPath(); clock.strokeStyle = "#D2691E"; clock.lineWidth = 5; clock.rotate(2 * Math.PI / 60 * m + 2 * Math.PI / 60 * s / 60); clock.moveTo(0, 0); clock.lineTo(0, -110); clock.lineCap = "round"; clock.stroke(); clock.restore(); //秒針 clock.strokeStyle = "red"; clock.rotate(2 * Math.PI / 60 * s); clock.lineWidth = 4; clock.beginPath(); clock.moveTo(0, 0); clock.lineTo(0, -120); clock.lineCap = "round"; clock.stroke(); //中心 clock.fillStyle = " #CCFFFF"; clock.lineWidth = 5; clock.beginPath(); clock.arc(0, 0, 10, 0, 2 * Math.PI); clock.fill(); clock.strokeStyle = "cadetblue"; clock.stroke(); } </script> </body> </html>
到此,關于“javascript如何實現簡單鐘表效果”的學習就結束了,希望能夠解決大家的疑惑。理論與實踐的搭配能更好的幫助大家學習,快去試試吧!若想繼續學習更多相關知識,請繼續關注億速云網站,小編會繼續努力為大家帶來更多實用的文章!
免責聲明:本站發布的內容(圖片、視頻和文字)以原創、轉載和分享為主,文章觀點不代表本網站立場,如果涉及侵權請聯系站長郵箱:is@yisu.com進行舉報,并提供相關證據,一經查實,將立刻刪除涉嫌侵權內容。