jquery自動走動的圓形鐘錶效果程式碼例項

antzone發表於2017-04-04
jQuery

本章節分享一段程式碼例項，它實現了圓形鐘錶走動效果，程式碼如下:

[HTML] 純文字檢視 複製程式碼
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="http://www.softwhy.com/" />
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
<script type="text/javascript">
(function($){
  $.fn.drawClock = function(options){
    var mainId = $(this);
       
    //設定預設引數
    var defaultOptions = {
      'width': '300px',
      'height': '300px',
      'margin': '200px auto',
      'border': '1px solid #888',
      'border-radius': '50%',
      'box-shadow': '2px 2px 4px #111'
    };
    var options = $.extend(defaultOptions, options);
       
    mainId.css({
      'width': options.width, 
      'height': options.height, 
      'margin': options.margin,
      'border': options.border,
      'border-radius': options['border-radius'],
      'box-shadow': options['box-shadow'], 
      'position': 'relative'
    }).css({
      'background': '-webkit-gradient(radial, ' + mainId.width()/2 + ' ' + mainId.height()/2 + ', 0, ' + mainId.width()/2 + ' ' + mainId.height()/2 + ', ' + mainId.width()/2 + ', from(#ffe), to(#eee))', 
      'background': '-moz-radial-gradient(circle closest-side, #ffe 0%, #eee 100%)'
    });
       
    //鐘表盤中心圓
    $("<div id='circle'></div>").appendTo(mainId).css({
      'width': '20px',
      'height': '20px',
      'border-radius': '50%',
      'box-shadow': '0 0 5px rgba(0,0,0,0.8)',
      'position': 'absolute',
      'z-index': 999,
      'background': '-webkit-gradient(radial, ' + mainId.width()/2 + ' ' + mainId.height()/2 + ', 0, ' + mainId.width()/2 + ' ' + mainId.height()/2 + ', ' + mainId.width()/2 + ', from(#ffe), to(#eee))',
      'background': '-moz-radial-gradient(circle, #eee 30%, #ffe 100%)'
    }).css({
      'left': mainId.width()/2 - $('#circle').width()/2,
      'top': mainId.height()/2 - $('#circle').height()/2
    });
       
    var dateTime = new Date();
    var oHours = dateTime.getHours();
    var oMinutes = dateTime.getMinutes();
    var oSeconds = dateTime.getSeconds();
       
    //初始化時分秒
    var hPointer = drawPointer(mainId.width()/2, mainId.height()/2, mainId.width()/2*(3/6), 5, "#333", -90+oHours*30+oMinutes*6/12);
    var mPointer = drawPointer(mainId.width()/2, mainId.height()/2, mainId.width()/2*(4/6), 4, "#666", -90+oMinutes*6);
    var sPointer = drawPointer(mainId.width()/2, mainId.height()/2, mainId.width()/2*(5/6), 3, "#f00", -90+oSeconds*6);
       
    //運動時分秒
    var timer = setInterval(function(){
      dateTime = new Date();
      oHours = dateTime.getHours();
      oMinutes = dateTime.getMinutes();
      oSeconds = dateTime.getSeconds();    
      hPointer.css({'transform': 'rotate(' + (-90+oHours*30+oMinutes*6/12) + 'deg)'});
      mPointer.css({'transform': 'rotate(' + (-90+oMinutes*6) + 'deg)'});
      sPointer.css({'transform': 'rotate(' + (-90+oSeconds*6) + 'deg)'});
    }, 1000);
       
       
    //繪製鐘錶刻度
    for(var i=0; i<60; i++){
      var width = 3, height = 6, oBcolor = '#111';
      if(i%5 == 0){
        width = 5;
        height = 10;
      }
      if(i%15 == 0){
        oBcolor = 'red';
      }
      $("<div class='clockMark'></div>").appendTo(mainId).css({
        'width': width,
        'height': height,
        'position': 'absolute',
        'top': 0,
        'left': mainId.width()/2,
        'background': oBcolor,
        'transform': 'rotate(' + i*6 + 'deg)',
        "transform-origin": "0 " + mainId.width()/2+'px'
      });
    }
       
    //繪製鐘錶指標
    function drawPointer (startx, starty, width, height, bcolor, angle) {
      var oPointer = $("<div></div>");
      oPointer.appendTo(mainId).css({
        'width': width,
        'height': height,
        'position': 'absolute',
        'top': starty,
        'left': startx,
        'background': bcolor,
        'transform': 'rotate(' + angle + 'deg)',
        'transform-origin': '0 0'
      });
      return oPointer;
    }
       
    return this;
  }
})(jQuery);
$(function(){
  $('#clock').drawClock();
});
</script>
</head>
   
<body>
  <div id="clock"></div>
</body>
</html>

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