您好,登錄后才能下訂單哦!
這篇文章將為大家詳細(xì)講解有關(guān)如何利用css實現(xiàn)一個抽獎動畫效果,小編覺得挺實用的,因此分享給大家做個參考,希望大家閱讀完這篇文章后可以有所收獲。
首先我們先來看下最終的運(yùn)行效果:
從效果圖我們可以看到,抽獎會自動進(jìn)行,并顯示中獎信息。
這個效果基本是用CSS實現(xiàn)的,沒有用圖片,加一丟丟JS。完全沒有考慮兼容性。
具體步驟如下:
首先畫一個轉(zhuǎn)盤
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>幸運(yùn)大轉(zhuǎn)盤</title> <style> /* 重置默認(rèn)樣式 */ * { margin: 0; padding: 0; border: none; outline: none; } .wrapper { position: relative; height: 200px; width: 200px; padding: 20px; margin: 20px; background-color: #c0381f; box-shadow: #000000 0px 0px 10px; 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: 1px solid #c0381f; } </style> </head> <body> <div> <div> <div>開始抽獎</div> </div> </div> </body> </html>
效果如下,配色什么的不要在意,可能比較丑。。。
然后寫抽獎指針的小箭頭,用CSS畫三角形是一個比較常見的問題,通過設(shè)置width和height為0,然后用border實現(xiàn)。
如圖,矩形是由四個三角形邊框組成的,只要設(shè)置其它邊顏色為透明,就可以獲得單獨(dú)的三角形。
這里通過偽元素after實現(xiàn)三角形,并通過絕對定位將三角形定位到中間小圓的頂端。
.pointer::after { content: ''; position: absolute; left: 14px; top: -24px; border-width: 12px 6px; border-style: solid; border-color: transparent; border-bottom-color: #c0381f; }
現(xiàn)在才像一個指針了。
接下來是實現(xiàn)轉(zhuǎn)盤背景,不同的扇區(qū)對應(yīng)不同的獎品,這樣就有一個需求:實現(xiàn)任意角度扇形。
可能會想當(dāng)然的認(rèn)為和三角形一樣,不過是加一個border-radius而已,高度是圓半徑,寬度是tan(θ/2),但是實現(xiàn)出來的效果和想象并不一樣……(可能需要做一些其他操作以達(dá)到效果,但是我沒想到。
最后還是求助了搜索引擎。不得不承認(rèn)dalao們實在是太nb了,qaq……通過 linear-gradient 實現(xiàn)想法是真的棒。不過還有好多復(fù)雜的實現(xiàn)看的不是很懂= =
How to draw a circle sector in CSS?
Segments in a circle using CSS3
3種純CSS實現(xiàn)中間鏤空的12色彩虹漸變圓環(huán)方法
實現(xiàn)就是通過兩個正方形取相交區(qū)域。
我覺圖畫的還是挺好的:D
沒有用偽元素實現(xiàn),因為我還要加文字,至于文字的位置,我真的是瞎調(diào)的,反正正經(jīng)寫代碼也不會這么寫= =
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Document</title> <style> .sector { position: absolute; width: 100px; height: 200px; margin: 100px; border-radius: 0px 100px 100px 0; overflow: hidden; transform: rotate(-18deg); } .sector-inner { text-align: center; display: block; width: 40px; padding: 5px 3px 0 57px; height: 195px; background: #ffeab1; transform: translateX(-100px) rotate(36deg); transform-origin: right center; border-radius: 100px 0 0 100px; } .sector-inner span { display: block; transform-origin: center; transform: rotate(-19deg); color: #d46854; } </style> </head> <body> <div> <div> <span>謝謝參與</span> </div> </div> </body> </html>
效果如下,一個帶有文字的小扇形~~
OK,現(xiàn)在寫一堆扇形放到一開始的轉(zhuǎn)盤上。
現(xiàn)在的代碼是醬紫滴~~太長了折起來。
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>幸運(yùn)大轉(zhuǎn)盤</title> <style> /* 重置默認(rèn)樣式 */ * { margin: 0; padding: 0; border: none; outline: none; } .wrapper { position: relative; height: 200px; width: 200px; padding: 20px; margin: 20px; background-color: #c0381f; box-shadow: #000000 0px 0px 10px; 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: 0px 100px 100px 0; overflow: hidden; left: 100px; top: 0px; transform-origin: left center; } .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: 5px 3px 0 57px; height: 195px; transform: translateX(-100px) rotate(36deg); transform-origin: right center; border-radius: 100px 0 0 100px; } .sector-inner span { 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: 1px solid #c0381f; } .pointer::after { content: ''; position: absolute; left: 14px; top: -24px; border-width: 12px 6px; border-style: solid; border-color: transparent; border-bottom-color: #c0381f; } </style> </head> <body> <div> <div> <div> <div> <span>謝謝參與</span> </div> </div> <div> <div> <span> 50 積分</span> </div> </div> <div> <div> <span>謝謝參與</span> </div> </div> <div> <div> <span>100話費(fèi)</span> </div> </div> <div> <div> <span> 50 積分</span> </div> </div> <div> <div> <span>謝謝參與</span> </div> </div> <div> <div> <span>100話費(fèi)</span> </div> </div> <div> <div> <span>謝謝參與</span> </div> </div> <div> <div> <span> 50 積分</span> </div> </div> <div> <div> <span>10元話費(fèi)</span> </div> </div> <div>開始抽獎</div> </div> </div> </body> </html>
嘻嘻,現(xiàn)在是抽獎轉(zhuǎn)盤的樣子了吧~~~
(學(xué)習(xí)視頻分享:css視頻教程)
最后再加點(diǎn)浮夸的燈。
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>幸運(yùn)大轉(zhuǎn)盤</title> <style> /* 重置默認(rèn)樣式 */ * { margin: 0; padding: 0; border: none; outline: none; } .wrapper { position: relative; height: 200px; width: 200px; padding: 20px; margin: 20px; background-color: #c0381f; box-shadow: #000000 0px 0px 10px; border-radius: 50%; } .light { position: absolute; height: 10px; width: 10px; border-radius: 50%; top: 5px; left: 115px; transform-origin: 5px 115px; } .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: 0px 100px 100px 0; overflow: hidden; left: 100px; top: 0px; transform-origin: left center; } .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: 5px 3px 0 57px; height: 195px; transform: translateX(-100px) rotate(36deg); transform-origin: right center; border-radius: 100px 0 0 100px; } .sector-inner span { 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: 1px solid #c0381f; } .pointer::after { content: ''; position: absolute; left: 14px; top: -24px; border-width: 12px 6px; border-style: solid; border-color: transparent; border-bottom-color: #c0381f; } </style> </head> <body> <div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div> <div> <div> <span>謝謝參與</span> </div> </div> <div> <div> <span> 50 積分</span> </div> </div> <div> <div> <span>謝謝參與</span> </div> </div> <div> <div> <span>100話費(fèi)</span> </div> </div> <div> <div> <span> 50 積分</span> </div> </div> <div> <div> <span>謝謝參與</span> </div> </div> <div> <div> <span>100話費(fèi)</span> </div> </div> <div> <div> <span>謝謝參與</span> </div> </div> <div> <div> <span> 50 積分</span> </div> </div> <div> <div> <span>10元話費(fèi)</span> </div> </div> <div>開始抽獎</div> </div> </div> </body> </html>
現(xiàn)在轉(zhuǎn)盤CSS部分基本完成。簡單寫一下JS部分。點(diǎn)擊中間的指針時,指針會轉(zhuǎn),可以拉一條貝塞爾曲線,控制動畫的速度。
貝塞爾曲線可以簡單的看作是時間-距離曲線,斜率就是速度。因為轉(zhuǎn)盤的速度肯定是先快后慢,隨便拉一條。
http://cubic-bezier.com/#.2,.93,.43,1
css中添加屬性
.pointer { // ... transition: transform 3s cubic-bezier(.2,.93,.43,1); }
點(diǎn)擊開始抽獎的時候,為中間的指針加一個旋轉(zhuǎn)的角度。這里有一個問題就是不同的扇區(qū)抽到的概率是相同的,改成不同應(yīng)該…也蠻簡單的,不過主要是想練下CSS,JS就隨便寫了。
JS部分代碼。。
let getEle = document.getElementsByClassName.bind(document); let pointer = getEle('pointer')[0]; let result = getEle('result')[0]; let onRotation = false; // 記錄當(dāng)前是否正在旋轉(zhuǎn),如果正在旋轉(zhuǎn),就不能繼續(xù)點(diǎn)擊了 let reward = ['謝謝參與', '50積分', '謝謝參與', '100元話費(fèi)', '50積分', '謝謝參與', '100元話費(fèi)', '謝謝參與', '50積分', '10元話費(fèi)']; // 根據(jù)隨機(jī)角度獲取獎勵 let getReward = (function() { currentDeg = 0; return function() { // 轉(zhuǎn)三圈到四圈 let rotateDeg = Math.random() * 360 + 1080; currentDeg += rotateDeg; let rewardText = reward[Math.floor((currentDeg + 18) % 360 / 36)] return { deg: currentDeg, text: rewardText === '謝謝參與' ? '很遺憾,您沒有獲得獎品。' : '恭喜獲得: ' + rewardText } } })(); pointer.addEventListener('click', () => { if (onRotation) return; console.log('開始抽獎'); onRotation = true; let nextStatus = getReward(); console.log(nextStatus) result.innerText = nextStatus.text; result.style.display = 'none'; pointer.style.transform = `rotateZ(${nextStatus.deg}deg)`; }) pointer.addEventListener('transitionend', () => { console.log('抽獎結(jié)束'); onRotation = false; result.style.display = 'block'; })
現(xiàn)在一個抽獎轉(zhuǎn)盤基本完成了,最后一個需求,如果旁邊的等能夠亮起來就好了。
至于燈怎么亮,就需要用到CSS3的動畫了,我還不太熟悉,先去學(xué)習(xí)一下>_<
我學(xué)完回來了,參考教程http://www.ruanyifeng.com/blog/2014/02/css_transition_and_animation.html,內(nèi)容不是很多。
animation-name 指定動畫名稱,
animation-duration 指定動畫持續(xù)時間,
animation-timing-function 指定動畫函數(shù),和transition的函數(shù)是一樣的,
animation-delay 指定動畫延遲多久后執(zhí)行,
animation-iteration-count 指定動畫執(zhí)行多少次,默認(rèn)為一次,可以指定為infinite,無限循環(huán)。
animation-direction 指定動畫多次播放時,一次結(jié)束,下一次怎么接上一次,如圖。
animation-fill-mode 指定動畫結(jié)束后停在什么位置,默認(rèn)回到起始狀態(tài),forwards表示讓動畫停留在結(jié)束狀態(tài),backwards讓動畫回到第一幀的狀態(tài),both根據(jù)animation-direction輪流應(yīng)用forwards和backwards規(guī)則。
animation-play-state 動畫執(zhí)行狀態(tài),默認(rèn)為running,可以設(shè)置為pause,動畫將在當(dāng)前狀態(tài)停止,再改為running時,會接著上一次停止的位置繼續(xù)執(zhí)行動畫。
使用關(guān)鍵字 keyframes 來定義一個動畫。通過百分比指定其中任意幾個狀態(tài)。
嘗試著寫一下=。=
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Document</title> <style> div { height: 30px; width: 30px; animation: 1s twinkling 3, 100ms 3s twinkling 3; } @keyframes twinkling { 50% { background: red; } } </style> </head> <body> <div></div> </body> </html>
這是一個方塊,先慢速閃三下,再快速閃三下,最后消失。
animation: 1s twinkling 3;
就相當(dāng)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:
我覺得還可以:P 反正我只能寫成這樣了。
最后把動畫加到轉(zhuǎn)盤的燈上。完成代碼(好像顏色變了,咳,那是因為我animation學(xué)了太久都掉色了):
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>幸運(yùn)大轉(zhuǎn)盤</title> <style> * { /* 重置默認(rèn)樣式 */ 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: #000000 0px 0px 10px; border-radius: 50%; } .light { position: absolute; height: 10px; width: 10px; border-radius: 50%; top: 5px; left: 115px; transform-origin: 5px 115px; } .light-twinkling { animation: 1s twinkling 3, 100ms 3s twinkling 3; } .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: 0px 100px 100px 0; overflow: hidden; transform-origin: left center; } .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: 5px 3px 0 57px; height: 195px; transform: translateX(-100px) rotate(36deg); transform-origin: right center; border-radius: 100px 0 0 100px; } .sector-inner span { 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: 1px solid #ff5350; transition: transform 3s cubic-bezier(.2,.93,.43,1); } .pointer::after { content: ''; position: absolute; left: 14px; top: -24px; border-width: 12px 6px; border-style: solid; border-color: transparent; border-bottom-color: #ff5350; transform-origin: center; } .result { margin: 20px 60px; } @keyframes twinkling { 50% { background: transparent; } } </style> </head> <body> <div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> <div> <div> <div> <span>謝謝參與</span> </div> </div> <div> <div> <span> 5 0 積分</span> </div> </div> <div> <div> <span>謝謝參與</span> </div> </div> <div> <div> <span>100元話費(fèi)</span> </div> </div> <div> <div> <span> 5 0 積分</span> </div> </div> <div> <div> <span>謝謝參與</span> </div> </div> <div> <div> <span>100元話費(fèi)</span> </div> </div> <div> <div> <span>謝謝參與</span> </div> </div> <div> <div> <span> 5 0 積分</span> </div> </div> <div> <div> <span>10元話費(fèi)</span> </div> </div> <div>開始抽獎</div> </div> </div> <div></div> <script> let getEle = document.getElementsByClassName.bind(document); let pointer = getEle('pointer')[0]; let result = getEle('result')[0]; let lights = Array.prototype.slice.call(getEle('light')); let onRotation = false; // 記錄當(dāng)前是否正在旋轉(zhuǎn),如果正在旋轉(zhuǎn),就不能繼續(xù)點(diǎn)擊了 let reward = ['謝謝參與', '50積分', '謝謝參與', '100元話費(fèi)', '50積分', '謝謝參與', '100元話費(fèi)', '謝謝參與', '50積分', '10元話費(fèi)']; // 根據(jù)隨機(jī)角度獲取獎勵 let getReward = (function() { currentDeg = 0; return function() { // 轉(zhuǎn)三圈到四圈 let rotateDeg = Math.random() * 360 + 1080; currentDeg += rotateDeg; let rewardText = reward[Math.floor((currentDeg + 18) % 360 / 36)] return { deg: currentDeg, text: rewardText === '謝謝參與' ? '很遺憾,您沒有獲得獎品。' : '恭喜獲得: ' + rewardText } } })(); pointer.addEventListener('click', () => { if (onRotation) return; console.log('開始抽獎'); onRotation = true; lights.forEach(light => { light.className += ' light-twinkling'; }); let nextStatus = getReward(); console.log(nextStatus) result.innerText = nextStatus.text; result.style.display = 'none'; pointer.style.transform = `rotateZ(${nextStatus.deg}deg)`; }) pointer.addEventListener('transitionend', () => { console.log('抽獎結(jié)束'); setTimeout(() => { // 等閃爍三下結(jié)束 onRotation = false; lights.forEach(light => { light.className = 'light'; }); result.style.display = 'block'; }, 300); }) </script> </body> </html>
關(guān)于“如何利用css實現(xiàn)一個抽獎動畫效果”這篇文章就分享到這里了,希望以上內(nèi)容可以對大家有一定的幫助,使各位可以學(xué)到更多知識,如果覺得文章不錯,請把它分享出去讓更多的人看到。
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場,如果涉及侵權(quán)請聯(lián)系站長郵箱:is@yisu.com進(jìn)行舉報,并提供相關(guān)證據(jù),一經(jīng)查實,將立刻刪除涉嫌侵權(quán)內(nèi)容。