jQuery手机端大转盘抽奖特效代码下载


jQuery手机端大转盘抽奖特效代码下载
jQuery手机端大转盘抽奖特效代码下载以及手机端、大转盘抽奖等js/jquery网页特效代码下载。

1. 引入CSS

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

2. 引入JS

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

3. HTML代码

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<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
		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 = ["白云边", "关公坊", "黄鹤楼", "国宝 ", "陈克明", "金沙河", "雪花", "康师傅", "脉动","奥星","金龙鱼","中昌"];
	turnplate.colors = ["#FFF4D6", "#FFFFFF", "#FFF4D6", "#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 (){
				var arry = ["白云边20年45度", "关公坊红运", "黄鹤楼15年42度", "国宝桥米", "陈克明高筋宽带挂面", "金沙河麦芯龙须挂面", "雪花勇闯天涯听装", "康师傅冰红茶(柠檬味)", "脉动(芒果味)","奥星双低农家小榨","金龙鱼调和油","中昌非转基因食用调和油"];
					for (var i = arry.length - 1; i >= 0; i--) {
						if (arry[i].indexOf(txt) >= 0) {
							alert(arry[i])
						}
					}
				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(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);
	});
});
//控制中奖结果
function rnd(n, m){
	var random = 11;
	//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 = "#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("闪币")>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);  
		  }
		  //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:#e62d2d;overflow-x:hidden;">
<br>
<!-- 代码 开始 -->
<img src="images/1.png" id="shan-img" style="display:none;" />
<img src="images/2.png" id="sorry-img" style="display:none;" />
<div class="banner">
	<div class="turnplate" style="background-image:url(images/turnplate-bg.png);background-size:100% 100%;">
		<canvas class="item" id="wheelcanvas" width="422px" height="422px"></canvas>
		<img class="pointer" src="images/turnplate-pointer.png"/>
	</div>
</div>
<!-- 代码 结束 -->
</body>
</html>

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