微信小程序加入購(gòu)物車(chē)動(dòng)畫(huà)的實(shí)現(xiàn)(向上、向下)
場(chǎng)景描述:一般情況下,加入購(gòu)物車(chē)的動(dòng)畫(huà)效果都會(huì)是上圖的3的路線(xiàn),在這篇文章里,我們來(lái)實(shí)現(xiàn)1和2路線(xiàn)的加入購(gòu)物車(chē)的動(dòng)效(3路線(xiàn)的動(dòng)畫(huà)效果網(wǎng)上有很多,具體可以參考這篇文章來(lái)實(shí)現(xiàn): www.cnblogs.com/greengage/p… )。 實(shí)現(xiàn)方式:不管是上圖中的哪一種效果,我們都是用CSS3里的cubic-bezier(三次貝塞爾曲線(xiàn))來(lái)實(shí)現(xiàn)的。具體什么是三次貝塞爾曲線(xiàn),可以參考這篇文章: www.bbsmax.com/A/RnJWwpbRJ… #實(shí)現(xiàn)流程: 1、獲取屏幕的高度大小wx.getSystemInfo({// 獲取頁(yè)面的有關(guān)信息 success: function (res) { wx.setStorageSync('systemInfo', res) var ww = res.windowWidth; var hh = res.windowHeight; that.globalData.ww = ww; that.globalData.hh = hh; } }); 2、獲取點(diǎn)擊的位置(購(gòu)物車(chē)的位置我們定為最上方或者最下方),定義移動(dòng)距離/*加入購(gòu)物車(chē)動(dòng)效*/ _flyToCartEffect: function (events) { //獲得當(dāng)前點(diǎn)擊的位置,距離可視區(qū)域左上角 var touches = events.touches[0]; var diff = { x: '25px', y: app.globalData.hh -touches.clientY-40 + 'px'//向下 // y: 25- touches.clientY + 'px'//向上 }, style = 'display: block;-webkit-transform:translate(' + diff.x + ',' + diff.y + ') rotate(350deg) scale(0)'; //移動(dòng)距離 this.setData({ isFly: true, translateStyle: style }); var that = this; setTimeout(() => { that.setData({ isFly: false, translateStyle: '-webkit-transform: none;', //恢復(fù)到最初狀態(tài) isShake: true, }); setTimeout(() => { var counts = that.data.cartTotalCounts + that.data.productCounts; that.setData({ isShake: false, cartTotalCounts: counts }); }, 200); }, 1000); }, 3、在css里調(diào)用beizer函數(shù).fiexd-cart.animate{ animation: aCartScale 200ms cubic-bezier(.17,.67,.83,.67); animation-fill-mode: backwards; } aCartScale是,在曲線(xiàn)的最后,實(shí)現(xiàn)了個(gè)購(gòu)物車(chē)抖動(dòng)的動(dòng)畫(huà)@-webkit-keyframes aCartScale{ 0%{ -webkit-transform: scale(1.1); } 100% { -webkit-transform: scale(1); } } 至此,流程全部介紹完畢,下面是全部的代碼(里面可能有一些沒(méi)用的css樣式代碼,讀者可以自行根據(jù)需要?jiǎng)h除): js代碼:var app = getApp(); Page({ /** * 頁(yè)面的初始數(shù)據(jù) */ data: { isFly:false }, /*添加到購(gòu)物車(chē)*/ onAddingToCartTap: function (events) { //防止快速點(diǎn)擊 if (this.data.isFly) { return; } this._flyToCartEffect(events); }, /*加入購(gòu)物車(chē)動(dòng)效*/ _flyToCartEffect: function (events) { //獲得當(dāng)前點(diǎn)擊的位置,距離可視區(qū)域左上角 var touches = events.touches[0]; var diff = { x: '25px', y: app.globalData.hh -touches.clientY-40 + 'px'//向下 // y: 25- touches.clientY + 'px'//向上 }, style = 'display: block;-webkit-transform:translate(' + diff.x + ',' + diff.y + ') rotate(350deg) scale(0)'; //移動(dòng)距離 this.setData({ isFly: true, translateStyle: style }); var that = this; setTimeout(() => { that.setData({ isFly: false, translateStyle: '-webkit-transform: none;', //恢復(fù)到最初狀態(tài) isShake: true, }); setTimeout(() => { var counts = that.data.cartTotalCounts + that.data.productCounts; that.setData({ isShake: false, cartTotalCounts: counts }); }, 200); }, 1000); }, }) wxml代碼:<view class="container detail-container"> <view class="fixed-btns-box" bindtap="onCartTap"> <view class="fiexd-cart {{isShake?'animate':''}}"> <image src="../../imgs/icon/cart@top.png"></image> <view wx:if="{{cartTotalCounts>0}}">{{cartTotalCounts}}</view> </view> </view> <view style="position: fixed;right: 50rpx;bottom:100rpx;width: 100rpx;" class="add-cart-btn {{product.stock==0?'disabled':''}}" bindtap="onAddingToCartTap"> <text style="width: 360rpx">加入分享</text> <image class="cart-icon" src="../../imgs/icon/cart.png"></image> <image id="small-top-img" class="small-top-img {{isFly?'animate':''}}" src="https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1575871576&di=dda9d07660c88bea6553c3279b0a8cf0&imgtype=jpg&er=1&src=http%3A%2F%2Fpic.pc6.com%2Fup%2F2011-9%2F2011926155953.jpg" mode="aspectFill" style="{{translateStyle}}"></image> </view> <view class="fixed-btns-box2" bindtap="onCartTap"> <view class="fiexd-cart {{isShake?'animate':''}}"> <image src="../../imgs/icon/cart@top.png"></image> <view wx:if="{{cartTotalCounts>0}}">{{cartTotalCounts}}</view> </view> </view></view> wxss代碼:.detail-container { background-color:#F9F9F9}.detail-header-box,.detail-bottom-box{ background-color: #fff; }.detail-topic-img{ display: flex; justify-content: center; }.detail-topic-img image{ width: 100%; }.fixed-btns-box{ position: fixed; top:50rpx; right:12px; width: 80rpx; }.fixed-btns-box2{ position: fixed; right:12px; width: 80rpx; bottom: 50rpx; }.fiexd-cart image{ height: 64rpx; width: 64rpx; }.fiexd-cart view{ font-size: 24rpx; background-color: #AB956D; color: white; position: absolute; right: 64rpx; top: 0rpx; height: 36rpx; width: 36rpx; line-height: 36rpx; border-radius: 36rpx; text-align: center; }.fiexd-cart.animate{ animation: aCartScale 200ms cubic-bezier(.17,.67,.83,.67); animation-fill-mode: backwards; } @-webkit-keyframes aCartScale{ 0%{ -webkit-transform: scale(1.1); } 100% { -webkit-transform: scale(1); } }.product-counts,.add-cart-btn{ height: 100%; display: flex; font-size: 24rpx; align-items: center; justify-content: center; }.product-counts{ width: 50%; }.add-cart-btn{ position: relative; flex: 1; }.add-cart-btn:active{ color: #fff; }.add-cart-btn.disabled{ color: #D5D5DB; }.small-top-img{ height: 160rpx; width: 160rpx; right:6rpx; position: absolute; opacity: 0; }.small-top-img.animate{ opacity: 1; -webkit-transition:all 1000ms cubic-bezier(0.175, 0.885, 0.32, 1.275); }.add-cart-btn .cart-icon{ margin-left: 40rpx; height: 32rpx; width: 32rpx; }.disabled{ pointer-events: none; } |