Maison > Article > Applet WeChat > Développement d'un mini programme WeChat pour mettre en œuvre la fonction d'ajout de produits au panier (code)
Développement d'un mini programme WeChat pour mettre en œuvre la fonction d'ajout de produits au panier (code)
- 不言original
- 2018-08-16 17:01:5654530parcourir
Le contenu de cet article concerne le développement du mini centre commercial WeChat pour implémenter la fonction (code) d'ajout de produits au panier. J'espère qu'il aura une certaine valeur de référence. être utile pour vous aider.
Voir l'effet
Shopping cart.gif
Plan de développement
Mettez les informations sur le produit sur le. page de détails du produit Mettre en cache
2. La page du panier lit le cache pour obtenir des informations sur le produit
3. Calculez les articles du panier et supprimez les articles en cache
1. cache sur la page de détails du produit
detail.wxml
<button data-goodid="{{goods.goodsId}}" class="button-addCar" bindtap="addCar" formType="submit">确定</button>Liez l'événement bindtap pour ajouter le produit au panier.
detail.js
/**
* 加入购物车
*/
addCar: function (e) {
var goods = this.data.goods;
goods.isSelect=false;
var count = this.data.goods.count;
var title = this.data.goods.title;
if (title.length > 13) {
goods.title = title.substring(0, 13) + '...';
}
// 获取购物车的缓存数组（没有数据，则赋予一个空数组）
var arr = wx.getStorageSync('cart') || [];
console.log("arr,{}", arr);
if (arr.length > 0) {
// 遍历购物车数组
for (var j in arr) {
// 判断购物车内的item的id，和事件传递过来的id，是否相等
if (arr[j].goodsId == goodsId) {
// 相等的话，给count+1（即再次添加入购物车，数量+1）
arr[j].count = arr[j].count + 1;
// 最后，把购物车数据，存放入缓存（此处不用再给购物车数组push元素进去，因为这个是购物车有的，直接更新当前数组即可）
try {
wx.setStorageSync('cart', arr)
} catch (e) {
console.log(e)
}
//关闭窗口
wx.showToast({
title: '加入购物车成功！',
icon: 'success',
duration: 2000
});
this.closeDialog();
// 返回（在if内使用return，跳出循环节约运算，节约性能）
return;
}
}
// 遍历完购物车后，没有对应的item项，把goodslist的当前项放入购物车数组
arr.push(goods);
} else {
arr.push(goods);
}
// 最后，把购物车数据，存放入缓存
try {
wx.setStorageSync('cart', arr)
// 返回（在if内使用return，跳出循环节约运算，节约性能）
//关闭窗口
wx.showToast({
title: '加入购物车成功！',
icon: 'success',
duration: 2000
});
this.closeDialog();
return;
} catch (e) {
console.log(e)
}
}2. La page du panier lit le cache pour obtenir des informations sur le produit
cart.wxml
<view class="J-shopping-cart-empty" hidden="{{iscart}}"><view class="shopping-cart-empty">
<view class="bg"></view>
<view class="cart"></view>
<text class='empty-text'>购物车空空如也</text>
<p></p>
<navigator url="/pages/goods/goods">
<a href="//m.vip.com" class="button button-primary" >
去抢购 </a>
</navigator>
</view></view> <view class="scroll" hidden="{{hidden}}"><scroll-view class="scroll" scroll-y="true">
<view class="separate"></view>
<view wx:for="{{carts}}">
<view class="cart_container">
<view wx:if="{{!item.isSelect}}">
<icon class="item-select" bindtap="switchSelect" data-index="{{index}}" data-id="{{index}}" type="circle" size="20"></icon>
</view>
<view wx:elif="{{item.isSelect}}">
<icon class="item-select" bindtap="switchSelect" data-index="{{index}}" data-id="{{index}}" type="success" color="#f0145a" size="20"></icon>
</view>
<image class="item-image" src="{{item.imgUrl}}"></image>
<import src="../template/template.wxml" />
<view class="column">
<text class="title">{{item.title}}</text>
<image bindtap="delGoods" id="img{{index}}" data-index="{{index}}" src="../../images/del.png"></image>
<view class="row">
<text class="sku-price">￥{{item.price * item.count}}</text>
<view class="sku">
<template is="quantity" data="{{ ...item,index:index}}" />
</view>
</view>
</view>
</view>
<view class="separate"></view>
</view></scroll-view></view>
<view class="bottom_total" hidden="{{hidden}}">
<view class="bottom_line"></view>
<view class="row">
<view wx:if="{{!isAllSelect}}">
<icon class="item-allselect" bindtap="allSelect" type="circle" size="20"></icon>
</view>
<view wx:elif="{{isAllSelect}}">
<icon class="item-allselect" bindtap="allSelect" type="success" color="#f0145a" size="20"></icon>
</view>
<text class="small_text">全选</text>
<text>合计:￥ </text>
<text class="price">{{totalMoney}}</text>
<button class="button-red" bindtap="toBuy" formType="submit">去结算 </button>
</view></view>cart .wxss
@import "../template/template.wxss";
page{
background: #f3f4f5;
/* font-size: 37.5px; */
}
.column image {
width:33rpx;
height:35rpx;
display:inline-block;
overflow:hidden;
float:right;
margin-top: -40rpx;
margin-left:400rpx;
}
.J-shopping-cart-empty{
margin: 0;
padding: 0;
border: 0;
font: inherit;
font-size: 100%;
vertical-align: baseline;
}
.shopping-cart-empty {
height: 250px;
padding-top: 3.2rem;
padding-bottom: 1.6rem;
background-color: #fff;
text-align: center;
position: relative;
}
.shopping-cart-empty .bg{
position: absolute;
width: 16.29333rem;
height: 6.73333rem;
background: transparent url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAm0AAAEXAQMAAADFlOHHAAAABlBMVEUAAAAAAAClZ7nPAAAAAnRSTlMAFRtOKdMAAArmSURBVHja5ZxNiBzHFcf/b2pcvUSt6UkOoYWG7RUE5+LgXtvIIzTsrGXIIST3HAxuWSbxYSEjCI4CiqY2MrIPSywiQhRyiHwLIQdBgiNwcMpswDYoiQkEBDa4iME5ug0JjM1oKofdmf6q7Z7proAgfezp+fXrV69evffqA/jfX5es0tjEKs57xSrusmv1W5VVXIDLNnET9rFFmiMDbhG3hUnLIi52JLP4rWILFnHrFNvEXXJuw7Fnw3Lgo2Ovv1LsomevvzrCRWiLRmoLHJE9M5miBWmtS7C7YGQNF6+7IBK2VCcvuaCr1hr2LeUC16zh3hZt4K49s0Mb+KY13Ajc5jAb2cWF4MDIIq6F2l12VrjTBauN83Thlp/BUXHQBJyjuuD4X4XeFMwI2Fg4hNzr3zvA0dToPTQTRYE/FQmuk//D/XcA/qE2RljjmBn6+o9E4u76ud+O6U+0nunPzcLhogHnyUS6osV8ovXMrLth7F6UJqeykI5U4dcdwDG6L6bFugmH0UI6gy4uA951o3ATdIxut7/AeQbTUqSnZuHgOsrwS2+B6wEQy+GCCYArJhxftEC/gDt+I6IbOyYrkQBTJpyzaAEF5Aa1429E9MaO0U8CQ+OAyuZNR0XckR+rABYbXRG9Oef2C7jObxT94xkzbmj2bBTP/9sr4FxEJFwjjuIjHOVc+z13FVwgKjxbny+Pi2iS9PGWNnWcEQOwvRxu5IkEp7XJYiImlsdNEw80/tyoREkCOVM6EjeW8BR8AHBmSWumW1hALo0bAOPJQdQ6FghuN8T1QXqGHgCagGaGJiYgWgHH4kD0ADgCQ2XAsVVwPpxX35YdAD08OkNTXA/e4DPVARBoLdE14jYwXhq3HrmHuLg4Zh3gQkfHy+J6ko84gLUjSh0EhEHOII/EuTgj2MgB4AJg94yGEl7KKdVlisTAgOvgLOjOHLfVM46QocrjHEViasQ9BsxxjgqmJqdzRuRwvhvR7l0j7kXgJjvAzXDf4FNGCPIurO9HjPaM49WLwAdMAJ1vaOnsGUb8AXgeN/KjDmubxit8/xDn6Fu47BpGIY9kHqe6kcvco3DPMAFwwFN9Q79gOs7hSIZRnx+J+4AkwOFMMDGNkbNBDsdEqMKWCcfEi4e4QN+Hp6CMxpnFOQil4v5RuJskgSu/FtAwRj88FdgemMMJIVnfiHsMuAMJ+hgIYnPUxnMexcVJEsw4OIuzoDtQcK7iUQ2sG2PAHM5Hh4nEpFrpRjoDFkKhx7RWwMTQx8BEdpwNhMviRC08/XRP8BEU+qTfAwyRXgxAZnFnpc8mSUyawa1HrkJ0+DXD4pdOAYyyeXyoQuY6qZZJ8hjpDX6oMDrAmWqxYwBb2USlG0aMJ8mGl8Ip59WPJEYHXzM0mMnjEnDezDqUULJW4suOpWpfiilPHErnmVxYXwF0J4s7IVjK7E6mcaQ1EGIAMG2y4V7R4bsnQVcTszshnFRePZ4CfQT3x+Ycyy2aYicAPkpsoCuPp52jOggG9MwY3vFiR3GmBzH6vKFHZ5DNt0aFWD/pEkWPSnHGpMLg01Sano6Djb26qsQQsl1kkktPlRSQRFBZOKAsTpfVwiRTVTiWwXmzsqclJsvjfABalZdoguVxPcCZVVR8nPKv7aZ8Sg8Yq4qXY1pdElrgHF31LQhEuXRuyu+P43KcDzwry9+X4DpMiyrcuPyR8CA2PPB9w6rpK9fR26UPjOGnyihV9VdnWPHEfpyE1NVza5VPyGFcTFuPviqeINGyOd1HgG8Rx+ziOFKG8sDhXMB9cHH+A40LrePaFnGRXekiu9Jt28XJBxonrOLIPs7iFD3BqnTs/wpnuWWVXTO+bNejeMIqDhO7uOHstzZx9Gx1yCNtvhAstuoR+cAYotdTRgzXM0S1NaNC1oPPisrT92riOhihqLxJzZn9lrOrcsUJAHinJo6Tlmwre+8K8EJdHK6Afy8bsOsmOMB9N5tH7gMvPFJTdwBO/DRbUbgA7DxSX7rHH/4wj3u+gXQPf+vnKo97uL50d9/fmFjCtQD84vXt9RzuK/Wlo9/tCCeHe6K+dOw77yJToTwv8MTp2jj+lxvZkvSmwOknRV3c8V+eznrkTYEfzOrhGHDi9Z1s7XlTVFUYynCP79z7Q6aWtClwmcmauC9orXUeN4Kqh9Na6/vb2Y9VUDWX4zD9n3kCkqRKCtI0ybdkyAbgofS3jWMSNXN+BuBnWmdqjs9OqG5ow7TWWuvfp+9dWmdgXr1xVuvZrXwixxn4cXuBAWMtlwtLNJJ0lW461nCCrmJkLbsh8cV9iyE1tTc+shhSs9b2vkUckXjLYoROgnaFvcIaCRLSIk6SUBZXM0pmDCFrF18cDOg9a7hL6wh+ZU+6YApvVtBdULcTB/+Gd25UcIx1k6POAMfORfncsz7Oh/d0Hjeuvf6a+2BP5XA0qY1jPtipHI4pWMUJkjUdNPPBToWF8pP0pFVcoOri6LU8TkIN6vUUtga6dbuQRqu4npdhLui1PC7GRVUvDKI90PXbhQLPUPbs4bYQ1NwiQnug6/ligAs0wOnYgEsnM2IVHAqRey+JLYGS1eAG3EuGl/vrmdXIwxVwPzHc7A9FKtWiSbS88kxTzOHZV1KpVqBWwJlKPOHFWQo3iyI0ukYjTYtUyFFR2AwXRfvsb3PdDRGOmuLYYtqeJthsOA6rEVuUzTyJ4b1mODlyeKqqNGsWYZEMO/Muy6Zw4qa4/vo8IPWuYdgwOiXhD+buzuXUtH7MRDBJcJ5qioOn5uri7ErUcJKGobXImDmLo3YznINklS0PRMQbSieTVYhsig2nfJdnVQpGKllxzxRCVr6PsjL+iJPyAwNC2i99emtagetjUVphAFC+UOafVeKlcCQAlK0NYfpqxSIe9JKyFwkBlG0GbNFu1ZjcS7l2IcsHWo5dUVHpcFM4KVE6adKGVGeqcGOxPG57dr48THBJr4CLvivLm9ZNrVaLBFC2CdVF+NXcvorCIyndnhe8FLeG7qAig3VTLX9BOBU4v08flPfCVOj5JJzSTS5rWHvHKd/NnJ5M2oIjynA+vD23POlKr3kcgMsyXBfO6/2Ktsi8vVVayuiCuFoFx6MKnCdWki4sw4Wg4ytMXbrg/bJdqBtgaysE4y5aftlE5wZaq+G4W1a42EDr2yvgOFqdMm8boeWDVsCx0gWd2+BdSVgBVzoubqPdnS6PYxWnFWyjvfnyWyvgytfCSjy0iQsr4MqHPQH3FJ5bPnZ8WVXg1k7h3PK4P6EKd2EV3KQi8MXac/j6CllBFc4/hz/D0kXAl54WL1nEdaW0hmNAV473LOJC0bW2orMFbAjYxJ2yiOPA19JzAGFj3Pn0EpRpM1wbeCqN+2tj3NMpHL1sA7fQGGt4REcb+Htqp1bTA0TawI9TuKanpXDgWgrXamgpDLiWik55w5NmSNBLqS3MvOk5ODG1U7hW01N6gt1HUjiGhpZCn7mpAYCh5qqARLxXUgEUiaaTbjTJ4ppOCQYipS+JTsPFsTRh6XCPCQwbbX0IrmUibwU1biTeNB3o44ojmISdywWCGaxNgnIAt1Bz0YfRJRwK+SDiaFccVmLsXPsKsHhYz/kRjEev1MXdxFFnttS5Nvdsqg7+2zZVB39fwN5pXXC3pcVT3cCjyKLqwDdCi6oDC32LqgMLO549Guim80eLONyj2CbuLqxeO3Zxz9vFnbaL+7Jd3Lpd3Ar52X8BXSURa9qZGGgAAAAASUVORK5CYII=);
left: 50%;
-webkit-transform: translateX(-50%);
transform: translateX(-50%);
background-size: 100%;
top: 0;
}
.shopping-cart-empty .cart{
width: 5.83333rem;
height: 7.46rem;
background: transparent url(data:image/png;base64,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) no-repeat;
background-size: 100%;
margin: 0 auto;
}
.shopping-cart-empty .button {
width: 8.46667rem;
height: 1.5rem;
display: block;
margin: 20rpx auto;
}
.empty-text {
font-size: .64667rem;
color: #222;
margin-top: .53333rem;
line-height: .74667rem;
font-weight: 400;
}
.button-primary {
border: 1px solid #de3c96;
color: #de3c96;
text-decoration: none;
text-align: center;
display: block;
border-radius: .21267rem;
line-height: 1.5rem;
-webkit-appearance: none;
background: none;
padding: 0 .26667rem;
margin: 0;
white-space: nowrap;
position: relative;
text-overflow: ellipsis;
font-size: .74333rem;
font-family: inherit;
cursor: pointer;
user-select: none;
}
.cart_container {
display: flex;
flex-direction: row;
background-color: #FFFFFF;
margin-bottom: 10rpx;
}
.scroll {
margin-bottom: 120rpx;
}
.column {
display: flex;
flex-direction: column;
}
.row {
display: flex;
flex-direction: row;
align-items: center;
}
.sku {
margin-left: 100rpx;
position: absolute;
right: 30rpx;
margin-top: 30rpx;
}
.sku-price {
color: red;
position: relative;
margin-top: 30rpx;
}
.price {
color: red;
position: relative;
}
.title {
font-size: 32rpx;
margin-top: 40rpx;
}
.small_text {
font-size: 28rpx;
margin-right: 40rpx;
margin-left: 25rpx;
}
.item-select {
width: 40rpx;
height: 40rpx;
margin-top: 90rpx;
margin-left: 20rpx;
}
.item-allselect {
width: 40rpx;
height: 40rpx;
margin-left: 20rpx;
margin-top:25rpx;
}
.item-image {
width: 180rpx;
height: 180rpx;
margin: 20rpx;
}
.bottom_line {
width: 100%;
height: 2rpx;
background: lightgray;
}
.bottom_total {
position: fixed;
display: flex;
flex-direction: column;
bottom: 0;
width: 100%;
height: 120rpx;
line-height: 120rpx;
background: white; /* margin-top: 300rpx; */
border-top: 1rpx solid #ccc; z-index: 99;
}
.button-red {
background-color: #f0145a;
position: fixed;
right: 0;
color: white;
text-align: center;
display: inline-block;
font-size: 30rpx;
border-radius: 0rpx;
width: 30%;
height: 120rpx;
line-height: 120rpx; /* border: 1rpx solid #ccc; */
}cart.js
/**
* 页面的初始数据
*/
data: {
carts: [], //数据
iscart: false,
hidden: null,
isAllSelect: false,
totalMoney: 0,
},
onShow: function () {
// 获取产品展示页保存的缓存数据（购物车的缓存数组，没有数据，则赋予一个空数组）
var arr = wx.getStorageSync('cart') || [];
console.info("缓存数据："+arr); // 有数据的话，就遍历数据，计算总金额 和 总数量
if (arr.length > 0) {
// 更新数据
this.setData({
carts: arr,
iscart: true,
hidden: false
});
console.info("缓存数据：" + this.data.carts);
}else{
this.setData({
iscart: false,
hidden: true,
});
}
},3. Calcul des articles du panier et suppression des articles mis en cache
cart.js
//勾选事件处理函数
switchSelect: function (e) {
// 获取item项的id，和数组的下标值
var Allprice = 0, i = 0;
let id = e.target.dataset.id,
index = parseInt(e.target.dataset.index);
this.data.carts[index].isSelect = !this.data.carts[index].isSelect; //价钱统计
if (this.data.carts[index].isSelect) {
this.data.totalMoney = this.data.totalMoney + (this.data.carts[index].price * this.data.carts[index].count);
} else {
this.data.totalMoney = this.data.totalMoney - (this.data.carts[index].price * this.data.carts[index].count);
}
//是否全选判断
for (i = 0; i < this.data.carts.length; i++) {
Allprice = Allprice + (this.data.carts[index].price * this.data.carts[index].count);
}
if (Allprice == this.data.totalMoney) {
this.data.isAllSelect = true;
} else {
this.data.isAllSelect = false;
}
this.setData({
carts: this.data.carts,
totalMoney: this.data.totalMoney,
isAllSelect: this.data.isAllSelect,
})
},
//全选
allSelect: function (e) {
//处理全选逻辑
let i = 0;
if (!this.data.isAllSelect) {
this.data.totalMoney = 0;
for (i = 0; i < this.data.carts.length; i++) {
this.data.carts[i].isSelect = true;
this.data.totalMoney = this.data.totalMoney + (this.data.carts[i].price * this.data.carts[i].count);
}
} else {
for (i = 0; i < this.data.carts.length; i++) {
this.data.carts[i].isSelect = false;
}
this.data.totalMoney = 0;
}
this.setData({
carts: this.data.carts,
isAllSelect: !this.data.isAllSelect,
totalMoney: this.data.totalMoney,
})
}, // 去结算
toBuy() {
wx.showToast({
title: '去结算',
icon: 'success',
duration: 3000
});
this.setData({
showDialog: !this.data.showDialog
});
}, //数量变化处理
handleQuantityChange(e) {
var componentId = e.componentId;
var quantity = e.quantity;
this.data.carts[componentId].count.quantity = quantity;
this.setData({
carts: this.data.carts,
});
},
/* 减数 */
delCount: function (e) {
var index = e.target.dataset.index;
console.log("刚刚您点击了加一");
var count = this.data.carts[index].count; // 商品总数量-1
if (count > 1) {
this.data.carts[index].count--;
}
// 将数值与状态写回
this.setData({
carts: this.data.carts
});
console.log("carts:" + this.data.carts);
this.priceCount();
},
/* 加数 */
addCount: function (e) {
var index = e.target.dataset.index;
console.log("刚刚您点击了加+");
var count = this.data.carts[index].count; // 商品总数量+1
if (count < 10) {
this.data.carts[index].count++;
}
// 将数值与状态写回
this.setData({
carts: this.data.carts
});
console.log("carts:" + this.data.carts);
this.priceCount();
},
priceCount: function (e) {
this.data.totalMoney = 0;
for (var i = 0; i < this.data.carts.length; i++) {
if (this.data.carts[i].isSelect == true) {
this.data.totalMoney = this.data.totalMoney + (this.data.carts[i].price * this.data.carts[i].count);
}
}
this.setData({
totalMoney: this.data.totalMoney,
})
},
/* 删除item */
delGoods: function (e) {
this.data.carts.splice(e.target.id.substring(3),1); // 更新data数据对象
if (this.data.carts.length > 0) {
this.setData({
carts: this.data.carts
})
wx.setStorageSync('cart', this.data.carts);
this.priceCount();
} else {
this.setData({
cart: this.data.carts,
iscart: false,
hidden: true,
})
wx.setStorageSync('cart', []);
}
} recommandé associé :
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