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作者:我不吃饼干呀
/wenruo/p/9732704.html
效果
基本是用CSS实现的,没有用图片,加一丢丢JS。完全没有考虑兼容性。
首先画一个转盘,
<!DOCTYPEhtml><htmllang="en"><head><metacharset="UTF-8"><title>幸运大转盘</title><style>/*重置默认样式*/*{margin:0;padding:0;border:none;outline:none;}.wrapper{position:relative;height:200px;width:200px;padding:20px;margin:20px;background-color:#c0381f;box-shadow:#0000000px0px10px;border-radius:50%;}.panel{position:relative;height:200px;width:200px;background-color:#b7b7b7;border-radius:100px;}.pointer{position:absolute;left:79px;top:79px;z-index:10;height:30px;width:30px;padding:6px;color:#fff899;line-height:15px;font-size:12px;text-align:center;background-color:#dc5b5b;border-radius:50%;border:1pxsolid#c0381f;}</style></head><body><divclass="wrapper"><divclass="panel"><divclass="pointer">开始抽奖</div></div></div></body></html>
效果如下,配色什么的不要在意,可能比较丑。。。
然后写抽奖指针的小箭头,用CSS画三角形是一个比较常见的问题,通过设置width和height为0,然后用border实现。
如图,矩形是由四个三角形边框组成的,只要设置其它边颜色为透明,就可以获得单独的三角形。
这里通过伪元素after实现三角形,并通过绝对定位将三角形定位到中间小圆的顶端。
.pointer::after{content:'';position:absolute;left:14px;top:-24px;border-width:12px6px;border-style:solid;border-color:transparent;border-bottom-color:#c0381f;}
现在才像一个指针了。
哦 接下来是实现转盘背景,不同的扇区对应不同的奖品,这样就有一个需求:实现任意角度扇形。
可能会想当然的认为和三角形一样,不过是加一个border-radius而已,高度是圆半径,宽度是tan(θ/2),但是实现出来的效果和想象并不一样……(可能需要做一些其他操作以达到效果,但是我没想到。
最后还是求助了搜索引擎。不得不承认dalao们实在是太nb了,qaq……通过linear-gradient 实现想法是真的棒。不过还有好多复杂的实现看的不是很懂= =
How to draw a circle sector in CSS?
Segments in a circle using CSS3
3种纯CSS实现中间镂空的12色彩虹渐变圆环方法
实现就是通过两个正方形取相交区域。
我觉图画的还是挺好的:D
没有用伪元素实现,因为我还要加文字,至于文字的位置,我真的是瞎调的,反正正经写代码也不会这么写= =
<!DOCTYPEhtml><htmllang="en"><head><metacharset="UTF-8"><title>Document</title><style>.sector{position:absolute;width:100px;height:200px;margin:100px;border-radius:0px100px100px0;overflow:hidden;transform:rotate(-18deg);}.sector-inner{text-align:center;display:block;width:40px;padding:5px3px057px;height:195px;background:#ffeab1;transform:translateX(-100px)rotate(36deg);transform-origin:rightcenter;border-radius:100px00100px;}.sector-innerspan {display:block;transform-origin:center;transform:rotate(-19deg);color:#d46854;}</style></head><body><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div></body></html>
效果如下,一个带有文字的小扇形~~
OK,现在写一堆扇形放到一开始的转盘上。
现在的代码是酱紫滴~~太长了折起来。
<!DOCTYPEhtml><htmllang="en"><head><metacharset="UTF-8"><title>幸运大转盘</title><style>/*重置默认样式*/*{margin:0;padding:0;border:none;outline:none;}.wrapper{position:relative;height:200px;width:200px;padding:20px;margin:20px;background-color:#c0381f;box-shadow:#0000000px0px10px;border-radius:50%;}.panel{position:relative;height:200px;width:200px;background-color:#b7b7b7;border-radius:100px;}.sector{position:absolute;width:100px;height:200px;border-radius:0px100px100px0;overflow:hidden;left:100px;top:0px;transform-origin:leftcenter;}.sector:nth-child(1){transform:rotate(-18deg);}.sector:nth-child(2){transform:rotate(18deg);}.sector:nth-child(3){transform:rotate(54deg);}.sector:nth-child(4){transform:rotate(90deg);}.sector:nth-child(5){transform:rotate(126deg);}.sector:nth-child(6){transform:rotate(162deg);}.sector:nth-child(7){transform:rotate(198deg);}.sector:nth-child(8){transform:rotate(234deg);}.sector:nth-child(9){transform:rotate(270deg);}.sector:nth-child(10){transform:rotate(306deg);}.sector:nth-child(2n+1).sector-inner{background:#fef6e0;}.sector:nth-child(2n).sector-inner{background:#ffffff;}.sector-inner{text-align:center;display:block;width:40px;padding:5px3px057px;height:195px;transform:translateX(-100px)rotate(36deg);transform-origin:rightcenter;border-radius:100px00100px;}.sector-innerspan {display:block;transform-origin:center;transform:rotate(-19deg);color:#d46854;}.pointer{position:absolute;left:79px;top:79px;z-index:10;height:30px;width:30px;padding:6px;color:#fff899;line-height:15px;font-size:12px;text-align:center;background-color:#dc5b5b;border-radius:50%;border:1pxsolid#c0381f;}.pointer::after{content:'';position:absolute;left:14px;top:-24px;border-width:12px6px;border-style:solid;border-color:transparent;border-bottom-color:#c0381f;}</style></head><body><divclass="wrapper"><divclass="panel"><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div><divclass="sector"><divclass="sector-inner"><span>50积分</span></div></div><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div><divclass="sector"><divclass="sector-inner"><span>100话费</span></div></div><divclass="sector"><divclass="sector-inner"><span>50积分</span></div></div><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div><divclass="sector"><divclass="sector-inner"><span>100话费</span></div></div><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div><divclass="sector"><divclass="sector-inner"><span>50积分</span></div></div><divclass="sector"><divclass="sector-inner"><span>10元话费</span></div></div><divclass="pointer">开始抽奖</div></div></div></body></html>
嘻嘻,现在是抽奖转盘的样子了吧~~~
最后再加点浮夸的灯。
<!DOCTYPEhtml><htmllang="en"><head><metacharset="UTF-8"><title>幸运大转盘</title><style>/*重置默认样式*/*{margin:0;padding:0;border:none;outline:none;}.wrapper{position:relative;height:200px;width:200px;padding:20px;margin:20px;background-color:#c0381f;box-shadow:#0000000px0px10px;border-radius:50%;}.light{position:absolute;height:10px;width:10px;border-radius:50%;top:5px;left:115px;transform-origin:5px115px;}.light:nth-child(2n){background-color:#fafce7;}.light:nth-child(2n+1){background-color:#ffe58b;}.light:nth-child(2){transform:rotate(36deg);}.light:nth-child(3){transform:rotate(72deg);}.light:nth-child(4){transform:rotate(108deg);}.light:nth-child(5){transform:rotate(144deg);}.light:nth-child(6){transform:rotate(180deg);}.light:nth-child(7){transform:rotate(216deg);}.light:nth-child(8){transform:rotate(252deg);}.light:nth-child(9){transform:rotate(288deg);}.light:nth-child(10){transform:rotate(324deg);}.panel{position:relative;height:200px;width:200px;background-color:#b7b7b7;border-radius:100px;}.sector{position:absolute;width:100px;height:200px;border-radius:0px100px100px0;overflow:hidden;left:100px;top:0px;transform-origin:leftcenter;}.sector:nth-child(1){transform:rotate(-18deg);}.sector:nth-child(2){transform:rotate(18deg);}.sector:nth-child(3){transform:rotate(54deg);}.sector:nth-child(4){transform:rotate(90deg);}.sector:nth-child(5){transform:rotate(126deg);}.sector:nth-child(6){transform:rotate(162deg);}.sector:nth-child(7){transform:rotate(198deg);}.sector:nth-child(8){transform:rotate(234deg);}.sector:nth-child(9){transform:rotate(270deg);}.sector:nth-child(10){transform:rotate(306deg);}.sector:nth-child(2n+1).sector-inner{background:#fef6e0;}.sector:nth-child(2n).sector-inner{background:#ffffff;}.sector-inner{text-align:center;display:block;width:40px;padding:5px3px057px;height:195px;transform:translateX(-100px)rotate(36deg);transform-origin:rightcenter;border-radius:100px00100px;}.sector-innerspan {display:block;transform-origin:center;transform:rotate(-19deg);color:#d46854;}.pointer{position:absolute;left:79px;top:79px;z-index:10;height:30px;width:30px;padding:6px;color:#fff899;line-height:15px;font-size:12px;text-align:center;background-color:#dc5b5b;border-radius:50%;border:1pxsolid#c0381f;}.pointer::after{content:'';position:absolute;left:14px;top:-24px;border-width:12px6px;border-style:solid;border-color:transparent;border-bottom-color:#c0381f;}</style></head><body><divclass="wrapper"><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="panel"><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div><divclass="sector"><divclass="sector-inner"><span>50积分</span></div></div><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div><divclass="sector"><divclass="sector-inner"><span>100话费</span></div></div><divclass="sector"><divclass="sector-inner"><span>50积分</span></div></div><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div><divclass="sector"><divclass="sector-inner"><span>100话费</span></div></div><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div><divclass="sector"><divclass="sector-inner"><span>50积分</span></div></div><divclass="sector"><divclass="sector-inner"><span>10元话费</span></div></div><divclass="pointer">开始抽奖</div></div></div></body></html>
现在转盘CSS部分基本完成。简单写一下JS部分。点击中间的指针时,指针会转,可以拉一条贝塞尔曲线,控制动画的速度。
贝塞尔曲线可以简单的看作是时间-距离曲线,斜率就是速度。因为转盘的速度肯定是先快后慢,随便拉一条。
http://cubic-/#.2,.93,.43,1
CSS中添加属性
.pointer { // ... transition: transform 3s cubic-bezier(.2,.93,.43,1); }
点击开始抽奖的时候,为中间的指针加一个旋转的角度。这里有一个问题就是不同的扇区抽到的概率是相同的,改成不同应该…也蛮简单的,不过主要是想练下CSS,JS就随便写了。
JS部分代码。。
letgetEle=document.getElementsByClassName.bind(document);letpointer=getEle('pointer')[0];letresult=getEle('result')[0];letonRotation=false;//记录当前是否正在旋转,如果正在旋转,就不能继续点击了letreward=['谢谢参与','50积分','谢谢参与','100元话费','50积分','谢谢参与','100元话费','谢谢参与','50积分','10元话费'];//根据随机角度获取奖励letgetReward=(function(){currentDeg=0;returnfunction(){//转三圈到四圈letrotateDeg=Math.random()*360+1080;currentDeg+=rotateDeg;letrewardText=reward[Math.floor((currentDeg+18)%360/36)]return{deg:currentDeg,text:rewardText==='谢谢参与'?'很遗憾,您没有获得奖品。':'恭喜获得:'+rewardText}}})();pointer.addEventListener('click',()=>{if(onRotation)return;console.log('开始抽奖');onRotation=true;letnextStatus=getReward();console.log(nextStatus)result.innerText=nextStatus.text;result.style.display='none';pointer.style.transform=`rotateZ(${nextStatus.deg}deg)`;})pointer.addEventListener('transitionend',()=>{console.log('抽奖结束');onRotation=false;result.style.display='block';})
现在一个抽奖转盘基本完成了,最后一个需求,如果旁边的等能够亮起来就好了。
至于灯怎么亮,就需要用到CSS3的动画了,我还不太熟悉,先去学习一下>_<
我学完回来了,参考教程/blog//02/css_transition_and_animation.html,内容不是很多。
animation-name指定动画名称,animation-duration指定动画持续时间,animation-timing-function指定动画函数,和transition的函数是一样的,animation-delay指定动画延迟多久后执行,animation-iteration-count 指定动画执行多少次,默认为一次,可以指定为infinite,无限循环。animation-direction 指定动画多次播放时,一次结束,下一次怎么接上一次,如图。
animation-fill-mode指定动画结束后停在什么位置,默认回到起始状态,forwards表示让动画停留在结束状态,backwards让动画回到第一帧的状态,both根据animation-direction轮流应用forwards和backwards规则。animation-play-state 动画执行状态,默认为running,可以设置为pause,动画将在当前状态停止,再改为running时,会接着上一次停止的位置继续执行动画。
使用关键字 keyframes 来定义一个动画。通过百分比指定其中任意几个状态。
尝试着写一下=。=
<!DOCTYPEhtml><htmllang="en"><head><metacharset="UTF-8"><title>Document</title><style>div{height:30px;width:30px;animation:1stwinkling3,100ms3stwinkling3;}@keyframestwinkling{50%{background:red;}}</style></head><body><div></div></body></html>
这是一个方块,先慢速闪三下,再快速闪三下,最后消失。
animation:1s twinkling 3;
就相当于
animation-name:twinkling;animation-duration:1s;animation-timing-function:ease;animation-delay:0s;animation-iteration-count:3;animation-direction:normal;animation-fill-mode:none;animation-play-state:running;
效果
我觉得还可以:P 反正我只能写成这样了。
最后把动画加到转盘的灯上。完成代码(好像颜色变了,咳,那是因为我animation学了太久都掉色了):
<!DOCTYPEhtml><htmllang="en"><head><metacharset="UTF-8"><title>幸运大转盘</title><style>*{/*重置默认样式*/margin:0;padding:0;border:none;outline:none;user-select:none;}.wrapper{position:relative;height:200px;width:200px;padding:20px;margin:20px;background-color:#ff5555;box-shadow:#0000000px0px10px;border-radius:50%;}.light{position:absolute;height:10px;width:10px;border-radius:50%;top:5px;left:115px;transform-origin:5px115px;}.light-twinkling{animation:1stwinkling3,100ms3stwinkling3;}.light:nth-child(2n){background-color:#fafce7;}.light:nth-child(2n+1){background-color:#ffe58b;}.light:nth-child(2){transform:rotate(36deg);}.light:nth-child(3){transform:rotate(72deg);}.light:nth-child(4){transform:rotate(108deg);}.light:nth-child(5){transform:rotate(144deg);}.light:nth-child(6){transform:rotate(180deg);}.light:nth-child(7){transform:rotate(216deg);}.light:nth-child(8){transform:rotate(252deg);}.light:nth-child(9){transform:rotate(288deg);}.light:nth-child(10){transform:rotate(324deg);}.panel{position:relative;height:200px;width:200px;background-color:#b7b7b7;border-radius:100px;}.sector{position:absolute;left:100px;top:0px;width:100px;height:200px;font-size:14px;border-radius:0px100px100px0;overflow:hidden;transform-origin:leftcenter;}.sector:nth-child(1){transform:rotate(-18deg);}.sector:nth-child(2){transform:rotate(18deg);}.sector:nth-child(3){transform:rotate(54deg);}.sector:nth-child(4){transform:rotate(90deg);}.sector:nth-child(5){transform:rotate(126deg);}.sector:nth-child(6){transform:rotate(162deg);}.sector:nth-child(7){transform:rotate(198deg);}.sector:nth-child(8){transform:rotate(234deg);}.sector:nth-child(9){transform:rotate(270deg);}.sector:nth-child(10){transform:rotate(306deg);}.sector:nth-child(2n+1).sector-inner{background:#fef6e0;}.sector:nth-child(2n).sector-inner{background:#ffffff;}.sector-inner{text-align:center;display:block;width:40px;padding:5px3px057px;height:195px;transform:translateX(-100px)rotate(36deg);transform-origin:rightcenter;border-radius:100px00100px;}.sector-innerspan {display:block;transform-origin:center;transform:rotate(-19deg);color:#d46854;}.pointer{position:absolute;left:79px;top:79px;z-index:10;height:30px;width:30px;padding:6px;color:#fff899;line-height:15px;font-size:12px;text-align:center;background-color:#ff5350;border-radius:50%;border:1pxsolid#ff5350;transition:transform3scubic-bezier(.2,.93,.43,1);}.pointer::after{content:'';position:absolute;left:14px;top:-24px;border-width:12px6px;border-style:solid;border-color:transparent;border-bottom-color:#ff5350;transform-origin:center;}.result{margin:20px60px;}@keyframestwinkling{50%{background:transparent;}}</style></head><body><divclass="wrapper"><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="light"></div><divclass="panel"><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div><divclass="sector"><divclass="sector-inner"><span>50积分</span></div></div><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div><divclass="sector"><divclass="sector-inner"><span>100元话费</span></div></div><divclass="sector"><divclass="sector-inner"><span>50积分</span></div></div><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div><divclass="sector"><divclass="sector-inner"><span>100元话费</span></div></div><divclass="sector"><divclass="sector-inner"><span>谢谢参与</span></div></div><divclass="sector"><divclass="sector-inner"><span>50积分</span></div></div><divclass="sector"><divclass="sector-inner"><span>10元话费</span></div></div><divclass="pointer">开始抽奖</div></div></div><divclass="result"></div><script>letgetEle=document.getElementsByClassName.bind(document);letpointer=getEle('pointer')[0];letresult=getEle('result')[0];letlights=Array.prototype.slice.call(getEle('light'));letonRotation=false;//记录当前是否正在旋转,如果正在旋转,就不能继续点击了letreward=['谢谢参与','50积分','谢谢参与','100元话费','50积分','谢谢参与','100元话费','谢谢参与','50积分','10元话费'];//根据随机角度获取奖励letgetReward=(function(){currentDeg=0;returnfunction(){//转三圈到四圈letrotateDeg=Math.random()*360+1080;currentDeg+=rotateDeg;letrewardText=reward[Math.floor((currentDeg+18)%360/36)]return{deg:currentDeg,text:rewardText==='谢谢参与'?'很遗憾,您没有获得奖品。':'恭喜获得:'+rewardText}}})();pointer.addEventListener('click',()=>{if(onRotation)return;console.log('开始抽奖');onRotation=true;lights.forEach(light=>{light.className+='light-twinkling';});letnextStatus=getReward();console.log(nextStatus)result.innerText=nextStatus.text;result.style.display='none';pointer.style.transform=`rotateZ(${nextStatus.deg}deg)`;})pointer.addEventListener('transitionend',()=>{console.log('抽奖结束');setTimeout(()=>{//等闪烁三下结束onRotation=false;lights.forEach(light=>{light.className='light';});result.style.display='block';},300);})</script></body></html>
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