forever
/
index.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!-- saved from url=(0063)https://www.17sucai.com/preview/836734/2018-01-04/zp/index.html -->
<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>谢车车生日大抽奖!</title>

<link href="./src/style.css" rel="stylesheet" type="text/css">

<script type="text/javascript" src="./src/jquery-1.10.2.js"></script>
<script type="text/javascript" src="./src/awardRotate.js"></script>

<script type="text/javascript">
var turnplate={
		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
		randomRate:[],              //控制获奖率，百分制(相加需等于100%)，对应restaraunts(顺序需要保持一致)，
		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.randomRate = ['30%', '10%', '20%', '5%', '10%', '20%', "5%"];  //小心设置按100%分配
	turnplate.restaraunts = ["吕旺旺的香吻", "吕旺旺的香吻again", "谢谢参与", "CHANEL包包", "7天免家务", "偷懒券3张", "YSL包包"];
	turnplate.colors = ["#FFFFFF", "#FFF4D6", "#FFFFFF","#FFF4D6", "#FFFFFF", "#FFF4D6", "#FFFFFF","#FFF4D6", "#FFFFFF"];


	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;
			}
		});
	};

	$('.pointer').click(function (){
		if(turnplate.bRotate)return;
		turnplate.bRotate = !turnplate.bRotate;
		//获取随机数(奖品个数范围内)
		var item = rnd(turnplate.randomRate);
		//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]);
	});
});

function rnd(rate){
	var random = Math.floor(Math.random() * 100);
	var myRandom = [];
	var randomList = [];
	var randomParent = [];
	for(var i = 0; i < 100; i++){
		myRandom.push(parseInt([i]) + 1);
	}
	for(var i = 0; i < rate.length; i++){
		var temp = [];
		var start = 0;
		var end = 0;
		randomList.push(parseInt(rate[i].split('%')[0]));
		for(var j = 0; j < randomList.length; j++){
			start += randomList[j-1] || 0
			end += randomList[j]
		}
		temp = myRandom.slice(start, end);
		randomParent.push(temp)
	}
	for(var i = 0; i < randomParent.length; i++){
		if($.inArray(random, randomParent[i]) > 0){
			return(i+1)
		}
	}

}


//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 = "#E5302F";
		  var text = turnplate.restaraunts[i];
		  var line_height = 17;
		  //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);
		  }

		  //添加对应图标
		  if(text.indexOf("猫币")>0){
			  var img= document.getElementById("shan-img");
			  img.onload=function(){
				  ctx.drawImage(img,-15,10);
			  };
			  ctx.drawImage(img,-15,10);
		  }else if(text.indexOf("谢谢参与")>=0){
			  var img= document.getElementById("sorry-img");
			  img.onload=function(){
				  ctx.drawImage(img,-15,10);
			  };
			  ctx.drawImage(img,-15,10);
		  } else if(text.indexOf("CHANEL")>=0){
			  var img= document.getElementById("chanel");
			  img.onload=function(){
				  ctx.drawImage(img,-15,15);
			  };
			  ctx.drawImage(img,-40,15);
		  } else if(text.indexOf("YSL包包")>=0){
			  var img= document.getElementById("ysl");
			  img.onload=function(){
				  ctx.drawImage(img,-15,15);
			  };
			  ctx.drawImage(img,-30,15);
		  }
		  else if(text.indexOf("吕旺旺")>=0){
			  var img= document.getElementById("kiss");
			  img.onload=function(){
				  ctx.drawImage(img,-30,15);
			  };
			  ctx.drawImage(img,-30,25);
		  }
		  //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>
</head>
<body style="background: rgb(255, 0, 0); overflow-x: hidden;">
    <img src="./src/1.png" id="shan-img" style="display:none;">
	<img src="./src/chanel.png" id="chanel" style="display:none;">
	<img src="./src/ysl.png" id="ysl" style="display:none;">
	<img src="./src/2.png" id="sorry-img" style="display:none;">
	<img src="./src/kiss.png" id="kiss" style="display:none;">
	<div align="center" style="margin:0 auto; width: 100%;">
		<img src="./src/title.png" style="margin-top: 30%; width: 50%;">
	</div>
	<div class="banner">
		<div class="turnplate" style="background-image:url(src/turnplate-bg.png);background-size:100% 100%;margin-top:5%;">
			<canvas class="item" id="wheelcanvas" width="422px" height="422px"></canvas>
			<img class="pointer" src="./src/turnplate-pointer.png">
		</div>
	</div>

</body></html>