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  • jquery插件jTimer(jquery定時器)使用方法

    時間:2020-11-10 09:38:16 jQuery 我要投稿

    關(guān)于jquery插件jTimer(jquery定時器)使用方法

      復制代碼 代碼如下:

      (function ($) {

      $.extend({

      timer: function (action,context,time) {

      var _timer;

      if ($.isFunction(action)) {

      (function () {

      _timer = setInterval(function () {

      if (!action(context)) {

      clearInterval(_timer);

      }

      }, time);

      })();

      }

      }

      });

      })(jQuery);

      復制代碼 代碼如下:

      #wrap

      {

      display: table;

      margin: 0 auto;

      }

      #cvs

      {

      display: table-cell;

      vertical-align: middle;

      }

      function drawRound(context) {

      if (context.counterclockwise) {

      draw(context.x, context.y, context.r, context.start, context.start - Math.PI / 50, context.counterclockwise);

      context.start -= Math.PI / 50;

      return context.start > 0.5 * Math.PI;

      }

      else {

      draw(context.x, context.y, context.r, context.start, context.start + Math.PI / 50, context.counterclockwise);

      context.start += Math.PI / 50;

      return context.start < Math.PI;

      }

      }

      function draw(x, y, r, sAngle, eAngle, counterclockwise) {

      var cvs = document.getElementById("cvs");

      ctx = cvs.getContext("2d");

      ctx.strokeStyle = "#f00";

      ctx.beginPath();

      ctx.arc(x, y, r, sAngle, eAngle, counterclockwise);

      ctx.stroke();

      }

      $(function () {

      $.timer(drawRound, { x: 100, y: 100, r: 50, start: 1.5 * Math.PI, counterclockwise: true }, 200);

      $.timer(drawRound, { x: 100, y: 100, r: 60, start: 0, counterclockwise: false }, 200);

      });