javascript - h5画布写的转盘抽奖插件问题-PHP Chinese Network Q&A

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=no">
<link rel="stylesheet" href="css/base.css">
<link rel="stylesheet" href="css/style.css">
<script src="js/jquery-1.10.2.js"></script>
<script src="js/awardRotate.js"></script>

    restaraunts:[],                //大转盘奖品名称
    colors:[],                    //大转盘奖品区块对应背景颜色
    outsideRadius:192,            //大转盘外圆的半径
    textRadius:155,                //大转盘奖品位置距离圆心的距离
    insideRadius:68,            //大转盘内圆的半径
    startAngle:0,                //开始角度
    
    bRotate:false                //false:停止;ture:旋转

};

$(document).ready(function(){

//动态添加大转盘的奖品与奖品区域背景颜色
 
turnplate.restaraunts = ["魔兽电影票", "20元抵用券", "谢谢参与", "20元抵用券", "魔兽电影票", "20元抵用券", "谢谢参与 ", "20元抵用券"];
turnplate.colors = ["#73c8f1", "#00a9e9", "#f6ab00", "#eeda39","#73c8f1", "#00a9e9", "#f6ab00", "#eeda39"];


var rotateTimeOut = function (){
    $('#wheelcanvas').rotate({
        angle:0,
        animateTo:2160,
        duration:8000,
        callback:function (){
            alert('网络超时，请检查您的网络设置！');
        }
    });
};
//旋转转盘 item:奖品位置; txt：提示语;
var rotateFn = function (item, txt){
    var angles = item * (360 / turnplate.restaraunts.length) - (360 / (turnplate.restaraunts.length*2));
    if(angles<270){
        angles = 270 - angles; 
    }else{
        angles = 360 - angles + 270;
    }
    $('#wheelcanvas').stopRotate();
    $('#wheelcanvas').rotate({
        angle:0,
        animateTo:angles+1800,
        duration:8000,
        callback:function (){
            alert(txt);
            turnplate.bRotate = !turnplate.bRotate;
        }
    });
};

 console.log(123)
$('#pointer').on("click",function(){
   console.log(123)  //这个地方发现打印不出来东西；但没有报错
    if(turnplate.bRotate)return;
    turnplate.bRotate = !turnplate.bRotate;
    //获取随机数(奖品个数范围内)
    var item = rnd(1,turnplate.restaraunts.length);
    //奖品数量等于10,指针落在对应奖品区域的中心角度[252, 216, 180, 144, 108, 72, 36, 360, 324, 288]
    rotateFn(item, turnplate.restaraunts[item-1]);
    /* switch (item) {
        case 1:
            rotateFn(252, turnplate.restaraunts[0]);
            break;
        case 2:
            rotateFn(216, turnplate.restaraunts[1]);
            break;
        case 3:
            rotateFn(180, turnplate.restaraunts[2]);
            break;
        case 4:
            rotateFn(144, turnplate.restaraunts[3]);
            break;
        case 5:
            rotateFn(108, turnplate.restaraunts[4]);
            break;
        case 6:
            rotateFn(72, turnplate.restaraunts[5]);
            break;
        case 7:
            rotateFn(36, turnplate.restaraunts[6]);
            break;
        case 8:
            rotateFn(360, turnplate.restaraunts[7]);
            break;
        case 9:
            rotateFn(324, turnplate.restaraunts[8]);
            break;
        case 10:
            rotateFn(288, turnplate.restaraunts[9]);
            break;
    } */
    console.log(item);
});

});

function rnd(n, m){

var random = Math.floor(Math.random()*(m-n+1)+n);
return random;

}

//页面所有元素加载完毕后执行drawRouletteWheel()方法对转盘进行渲染
window.onload=function(){

drawRouletteWheel();

};

function drawRouletteWheel() {
var canvas = document.getElementById("wheelcanvas");
if (canvas.getContext) {

  //根据奖品个数计算圆周角度
  var arc = Math.PI / (turnplate.restaraunts.length/2);
  var ctx = canvas.getContext("2d");
  //在给定矩形内清空一个矩形
  ctx.clearRect(0,0,422,422);
  //strokeStyle 属性设置或返回用于笔触的颜色、渐变或模式  
  ctx.strokeStyle = "#FFBE04";
  //font 属性设置或返回画布上文本内容的当前字体属性
  ctx.font = '16px Microsoft YaHei';      
  for(var i = 0; i < turnplate.restaraunts.length; i++) {       
      var angle = turnplate.startAngle + i * arc;
      ctx.fillStyle = turnplate.colors[i];
      ctx.beginPath();
      //arc(x,y,r,起始角,结束角,绘制方向) 方法创建弧/曲线（用于创建圆或部分圆）    
      ctx.arc(211, 211, turnplate.outsideRadius, angle, angle + arc, false);    
      ctx.arc(211, 211, turnplate.insideRadius, angle + arc, angle, true);
      ctx.stroke();  
      ctx.fill();
      //锁画布(为了保存之前的画布状态)
      ctx.save();   
      
      //----绘制奖品开始----
      ctx.fillStyle = "#FFFFFF";
      var text = turnplate.restaraunts[i];
      var line_height =20;
      //translate方法重新映射画布上的 (0,0) 位置
      ctx.translate(211 + Math.cos(angle + arc / 2) * turnplate.textRadius, 211 + Math.sin(angle + arc / 2) * turnplate.textRadius);
      
      //rotate方法旋转当前的绘图
      ctx.rotate(angle + arc / 2 + Math.PI / 2);
      
      /** 下面代码根据奖品类型、奖品名称长度渲染不同效果，如字体、颜色、图片效果。(具体根据实际情况改变) **/
      if(text.indexOf("M")>0){//流量包
          var texts = text.split("M");
          for(var j = 0; j<texts.length; j++){
              ctx.font = j == 0?'bold 20px Microsoft YaHei':'16px Microsoft YaHei';
              if(j == 0){
                  ctx.fillText(texts[j]+"M", -ctx.measureText(texts[j]+"M").width / 2, j * line_height);
              }else{
                  ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 2, j * line_height);
              }
          }
      }else if(text.indexOf("M") == -1 && text.length>6){//奖品名称长度超过一定范围 
          text = text.substring(0,6)+"||"+text.substring(6);
          var texts = text.split("||");
          for(var j = 0; j<texts.length; j++){
              ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 2, j * line_height);
          }
      }else{
          //在画布上绘制填色的文本。文本的默认颜色是黑色
          //measureText()方法返回包含一个对象，该对象包含以像素计的指定字体宽度
          ctx.fillText(text, -ctx.measureText(text).width / 2, 0);
      }
      
     
      //把当前画布返回（调整）到上一个save()状态之前 
      ctx.restore();
      //----绘制奖品结束----
  }

}
}

</script>

上面有两个打印的地方；当程序执行到点击按钮的时候发现里面无法执行；不知道什么原因；程序就卡在那里？？？没有报错；单独执行转盘是可以的