jucai/public/themes/default/views/mobile/app/lottery/index.blade.php

@extends('mobile.module.layouts.empty')

@push('meta')
@endpush

@push('css')
    <link href="{{ theme_asset('mobile/css/lottery.css') }}" rel="stylesheet">
@endpush

@push('js')
@endpush

@section('content')
    @foreach ($images as $k => $v)
        <img src="{{ $v }}" id="gift-img{{$k}}" style="display:none;"/>
    @endforeach
    <div class="banner">
        <div class="bgbox">
            <div class="tabbox clearfix" id="tabbox">
                <div class="boxlist">
                    <div class="turnplate">
                        <canvas class="item" id="wheelcanvas" width="422px" height="422px"></canvas>
                        <img class="pointer" src="{{ theme_asset('mobile/images/lottery/btn_start.png') }}"/>
                        <div class="panbg"></div>
                    </div>
                </div>
            </div>
        </div>
    </div>
    <div class="HDTitle">新春招聘会大转盘活动</div>
    <div class="HDinfo">
        <dl>
            <dt>活动说明</dt>
            <dd>
                <p>1.每次可以翻两张牌，当两次都翻到同一奖品时即为中奖，每天有三次机会；</p>
                <p>2.将获得发给一位微信好友，就可以增加3次机会，每天限5位好友；</p>
                <p>3.中奖粉丝成功提交个人信息后才能领取奖品；</p>
            </dd>
        </dl>
        <dl>
            <dt>活动奖品</dt>
            <dd>
                <p><em>1</em>IPHONE  5S一部(另送专用充电宝)</p>
                <p><em>2</em>佳能班单反相机 D700 </p>
            </dd>
        </dl>
        <dl>
            <dt>参与次数</dt>
            <dd>
                <p>您还可以抽奖次数：<i class="org"><span id="number">{{$number}}</span>次</i></p>
            </dd>
        </dl>
    </div>
@endsection

@section('script')
    <script type="text/javascript" src="{{ theme_asset('mobile/js/jquery-1.10.2.js') }}"></script>
    <script type="text/javascript" src="{{ theme_asset('mobile/js/awardRotate.js') }}"></script>
    <script type="text/javascript">
        // 欢乐转盘
        var turnplate = {
            number: "{{$number}}",                 //次数
            ids: [],                    //id列表
            restaraunts: [],				//大转盘奖品名称
            colors: [],					//大转盘奖品区块对应背景颜色
            images: [],                 //图片列表
            outsideRadius: 140,			//大转盘外圆的半径
            textRadius: 150,				//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
        };

        $(document).ready(function () {
            //动态添加大转盘的奖品与奖品区域背景颜色
            // 欢乐转盘
            turnplate.ids = {!! json_encode($ids)!!};
            turnplate.restaraunts = {!! json_encode($restaraunts)!!};
            turnplate.colors = {!! json_encode($colors)!!};
            turnplate.images = {!! json_encode($images)!!};


            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！');
                    }
                });
            };

            //欢乐旋转转盘 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);//欢乐转盘弹出框
                        turnplate.bRotate = !turnplate.bRotate;
                    }
                });
            };
            // 欢乐转盘
            $('.pointer').click(function () {
                if (turnplate.number == 0) {
                    alert('您今天已抽过奖，请明天再来！');
                    return;
                }

                turnplate.number--;
                $('#number').html(turnplate.number);

                if (turnplate.bRotate) return;
                turnplate.bRotate = !turnplate.bRotate;
                //获取随机数(奖品个数范围内)
                $.post('{{route("mobile.lottery.lottery_post")}}', {open_id: "{{$open_id}}",type:"{{$type}}",_token:"{{csrf_token()}}"}, function (json) {
                    if (json.status) {
                        var item = 0;
                        for (var i = 0; i < turnplate.ids.length; i++) {
                            if (turnplate.ids[i] == json.id) {
                                item = i + 1;
                                break;
                            }
                        }
                        //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, json.msg);
                    } else {
                        alert(json.msg);
                    }
                }, 'json');

            });

        });

        //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();// 欢乐转盘
        };

        // 欢乐转盘
        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
                    var img = document.getElementById("gift-img" + i);
                    img.onload = function () {
                        ctx.drawImage(img, -18, 25, 40, 40);
                    };
                    ctx.drawImage(img, -18, 25, 40, 40);

                    //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>
@endsection