vue實(shí)現(xiàn)購(gòu)物車全部功能的簡(jiǎn)單方法

更新時(shí)間：2021年07月06日 10:49:34 作者：老張?jiān)诰€敲代碼

vue是前端輕量級(jí)MVVM框架,入門(mén)門(mén)檻相對(duì)較低,今天用Vue做一個(gè)購(gòu)物車實(shí)例,所以下面這篇文章主要給大家介紹了關(guān)于vue實(shí)現(xiàn)購(gòu)物車全部功能的簡(jiǎn)單方法,需要的朋友可以參考下

主要功能如下：

增加商品信息
修改商品信息
刪除單個(gè)商品
刪除多個(gè)商品
清空購(gòu)物車
對(duì)商品單價(jià)進(jìn)行降序排序
根據(jù)商品名稱實(shí)現(xiàn)查找
實(shí)現(xiàn)商品數(shù)量加減
全選反選
實(shí)現(xiàn)勾選商品的總價(jià)計(jì)算

效果圖如下：

由于功能比較多就不一個(gè)個(gè)講了，我們先來(lái)講幾個(gè)主要功能的邏輯（增刪改查），最后放全放部代碼

首先我們先來(lái)看增加商品功能

//先來(lái)一個(gè)按鈕綁定顯示事件，點(diǎn)擊添加后出現(xiàn)一個(gè)彈窗
<button type="button" @click="xian">添加</button>

//return 中定義了一個(gè)dis默認(rèn)為false
 xian() {
                if (!this.dis == false) {
                    this.dis = false
                } else {
                    this.dis = true
                }
            },

然后再?gòu)棿爸悬c(diǎn)擊確認(rèn)修改，綁定一個(gè)事件把商品信息添加進(jìn)去

           <button type="button" @click="tian">確認(rèn)添加</button>

 //將要添加的商品信息push到一個(gè)新的數(shù)組中，添加完成之后關(guān)閉彈窗
 tian() {
                if (this.name == "" || this.counrty == "" || this.price == "") {
                    alert("商品信息不允許為空！")
                    return false
                } else {

                    this.shopPings.push({
                        name: this.name,
                        counrty: this.counrty,
                        price: this.price,
                        count: this.count,
                    })
                }
                this.name = "",
                    this.counrty = "",
                    this.price = "",
                    this.count = ""
                this.dis = false
            },

商品增加進(jìn)去之后突然發(fā)現(xiàn)商品信息寫(xiě)錯(cuò)了！?。?？不要慌，接下來(lái)帶大家看看修改功能

還是老規(guī)矩先定義一個(gè)按鈕綁定顯示事件，然后綁定顯示事件，除了事件名稱之外，跟上面添加類同，我們直接來(lái)看確認(rèn)修改功能

//定義按鈕綁定事件
   <button type="button" @click="xiugai">確認(rèn)修改</button>
   //將購(gòu)物車中的商品信息跟修改之后的進(jìn)行賦值修改，修改完成之后關(guān)閉彈窗
    xiugai() {
                console.log(this.int)
                let index = this.int
                console.log(this.name, this.price, this.count, )
                this.shopPings[index].name = this.name
                this.shopPings[index].price = this.price
                this.shopPings[index].counrty = this.counrty
                this.shopPings[index].count = this.count

                this.dis1 = false
            },

有了增加修改之后我們?cè)賮?lái)寫(xiě)一個(gè)刪除

定義一個(gè)按鈕綁定事件，傳入一個(gè)index值最后splice根據(jù)下標(biāo)刪除一條

定義一個(gè)按鈕綁定事件，傳入一個(gè)index值最后splice根據(jù)下標(biāo)刪除一條
 <button @click="del(index)">刪除</button>	
  del(index) {
                this.shopPings.splice(index, 1);
            },

清空購(gòu)物車的話就比較簡(jiǎn)單了直接設(shè)置按鈕點(diǎn)擊后數(shù)組為空即可

 alldel() {
                this.shopPings = []
            },

最后我們來(lái)看一下購(gòu)物車中的查詢功能

//return中設(shè)置input的value值
//定義一個(gè)input框，綁定value值，設(shè)置enter鍵盤(pán)事件并且綁定搜索事件
<input type="text" placeholder="請(qǐng)輸入要查詢的商品名稱" v-model="input_value" @keyup.13="search">

具體看注釋

//先來(lái)一個(gè)判斷判斷搜索框?yàn)榭盏臅r(shí)候進(jìn)行查詢會(huì)有提示信息不允許為空
//然后拿到數(shù)組中的每一項(xiàng)的名稱進(jìn)行查找如果沒(méi)有這個(gè)商品名稱則提示沒(méi)有該商品
//最后對(duì)數(shù)組filter進(jìn)行篩選，通過(guò)搜索框中輸入的商品名稱對(duì)比購(gòu)物車中的商品名稱來(lái)找到對(duì)應(yīng)商品
 search() {
                if (!this.input_value) {
                    return alert('請(qǐng)輸入內(nèi)容')
                }
                if (
                    this.shopPings.every((v) => {
                        v.name.indexOf(this.input_value) == -1
                    })
                ) {
                    this.input_value = ''
                    return alert('沒(méi)有此商品')
                }
                this.shopPings = this.shopPings.filter((v) => {
                    v.name.replace(this.input_value, this.input_value)
                    return v.name.indexOf(this.input_value) != -1
                })
            }

全部代碼：

<template>
    <div class="shopCar">
        <header>

            <button type="button" @click="delSelect">批量刪除</button>
            <button type="button" @click="alldel">清空購(gòu)物車</button>
            <button type="button" @click="xian">添加</button>
            <button type="button" @click="jiang">排序</button>
            <input type="text" placeholder="請(qǐng)輸入要查詢的商品名稱" v-model="input_value" @keyup.13="search">
            <div class="xiu" v-show="dis1">
                <input type="text" placeholder="名稱" v-model="name">
                <input type="text" placeholder="價(jià)格" v-model="price">
                <input type="text" placeholder="數(shù)量" v-model="count">
                <input type="text" placeholder="產(chǎn)地" v-model="counrty">

                <button type="button" @click="xiugai">確認(rèn)修改</button>
            </div>
            <div class="add" v-show="dis">
                <input type="text" placeholder="名稱" v-model="name">
                <input type="text" placeholder="價(jià)格" v-model="price">
                <input type="text" placeholder="數(shù)量" v-model="count">
                <input type="text" placeholder="產(chǎn)地" v-model="counrty">

                <button type="button" @click="tian">確認(rèn)添加</button>
            </div>
        </header>
        <main>
            <ul>
                <li>
                    <p><input type="checkbox" v-model="allChecked">
                        全選</p>
                    <p>名稱</p>
                    <p>產(chǎn)地</p>
                    <p>數(shù)量</p>
                    <p>單價(jià)</p>
                    <p>小計(jì)</p>
                    <p>操作</p>
                </li>
                <li v-for="(item,index) in shopPings" :key="index">
                    <p><input type="checkbox" v-model="item.checked">{{item.id}}</p>
                    <p>{{item.name}}</p>
                    <p>{{item.counrty}}</p>
                    <p><button type="button" @click="add(item)">+</button>
                        <input type="text" v-model="item.count" style="width:20px">
                        <button type="button" @click="remove(item)">-</button>
                    </p>
                    <p>{{item.price}}</p>
                    <p>{{item.price*item.count |suffix}}</p>
                    <p>
                        <button type="button" @click="xiu(index)"> 修改</button>

                        <button @click="del(index)">刪除</button>
                    </p>
                </li>
            </ul>
        </main>
        <footer>
            <p>總計(jì){{state.sum |suffix}}</p>
        </footer>
    </div>
</template>
<style scoped lang="scss">
    .shopCar {
        width: 1000px;
        border: 2px solid black;
        margin: 100px auto;
        overflow: auto;

        header {
            display: flex;
            justify-content: space-between;
            width: 600px;
            height: 27px;
            overflow: hidden;

            .add {
                width: 400px;
                background: #e4e1e1;
                position: absolute;
                left: 39%;
                top: 40%;

                input {
                    display: block;
                    margin: 20px auto;

                }

                button {
                    display: block;
                    margin: 0 auto;
                }
            }

            .xiu {
                width: 400px;
                background: #e4e1e1;
                position: absolute;
                left: 39%;
                top: 40%;

                input {
                    display: block;
                    margin: 20px auto;

                }

                button {
                    display: block;
                    margin: 0 auto;
                }
            }
        }

        main {
            // height: 400px;
            margin-top: 10px;

            ul {

                li {
                    height: 78px;
                    border-bottom: 2px solid black;
                    display: flex;
                    justify-content: space-between;

                    p {
                        float: left;
                        width: 140px;
                        height: 27px;
                        border: 2px solid black;
                        text-align: center;
                    }
                }
            }
        }

        footer {
            height: 50px;
            margin-top: 13px;
            line-height: 50px;
        }
    }
</style>
<script>
    const shopData = [{
            id: "",
            name: "鞋子",
            counrty: "山西",
            count: 1,
            price: 800,
        },
        {
            id: "",
            name: "櫥柜",
            counrty: "北京",
            count: 1,
            price: 3200,
        },
        {
            id: "",
            name: "口紅",
            counrty: "河北",
            count: 2,
            price: 200,
        },
        {
            id: "",
            name: "漢堡",
            counrty: "河南",
            count: 2,
            price: 200,

        },

    ]

    export default {
        //過(guò)濾器
        filters: {
            suffix(value) {
                let price = Number(value)
                return `￥ ${price.toFixed(2)}`
                //在金額前面插入一個(gè)￥符號(hào)然后定義小數(shù)點(diǎn)后面為倆位數(shù)字
            }
        },
        computed: {

            //全選
            allChecked: {
                get() {
                    const checkeds = this.shopPings.filter((item) => item.checked)
                    return checkeds.length === this.shopPings.length
                },
                set(state) {
                    // console.log(state)
                    this.shopPings.map((item) => {
                        item.checked = state
                        return item
                    })
                }
            },
            //小計(jì)計(jì)算
            totalPrice: function () {
                var total = 0;
                for (var i = 0; i < this.checkList.length; i++) {
                    var item = this.checkList[i];
                    total += item.price * item.count;
                }
                return total.toLocaleString();
            },
            //選中的商品總價(jià)計(jì)算
            state() {
                const checkeds = this.shopPings.filter((item) => item.checked)
                const checked = checkeds.length === this.shopPings.length
                const sum = checkeds.reduce((a, b) => {
                    return a + b.count * b.price;
                }, 0)
                return {
                    count: checkeds.length,
                    sum
                }
            },
        },
        data() {
            return {
                shopPings: [],
                dis: false, //確認(rèn)提交
                dis1: false, //確認(rèn)修改
                id: "",
                name: "", //名稱
                price: "", //單價(jià)
                count: "", //數(shù)量
                counrty: "", //產(chǎn)地
                input_value: "", //查詢框中input的值
            }
        },
        mounted() {
            window.fetch("/").then(() => {
                this.shopPings = shopData.map((item) => {
                    item.checked = false
                    return item
                })
            })
        },
        methods: {
            //添加商品
            xian() {
                if (!this.dis == false) {
                    this.dis = false
                } else {
                    this.dis = true
                }
            },
            //確認(rèn)添加
            tian() {
                if (this.name == "" || this.counrty == "" || this.price == "") {
                    alert("商品信息不允許為空！")
                    return false
                } else {

                    this.shopPings.push({
                        name: this.name,
                        counrty: this.counrty,
                        price: this.price,
                        count: this.count,
                    })
                }
                this.name = "",
                    this.counrty = "",
                    this.price = "",
                    this.count = ""
                this.dis = false
            },

            //刪除商品
            del(index) {
                this.shopPings.splice(index, 1);
            },

            //刪除選中的商品
            delSelect() {
                this.shopPings = this.shopPings.filter((item) => {
                    if (!item.checked) {
                        return item
                    }
                })
            },
            //全部刪除
            alldel() {
                this.shopPings = []
            },
            //減少購(gòu)買(mǎi)
            remove(data) {
                if (data.count > 0) {
                    data.count--
                }
                if (data.count === 0) {
                    data.checked = false
                }
            },
            //增加購(gòu)買(mǎi)
            add(data) {
                data.count++
            },
            //修改商品
            xiu(i) {
                this.int = i
                if (!this.dis1 == false) {
                    this.dis1 = false
                } else {
                    this.dis1 = true
                }
            },
            // 確認(rèn)修改
            xiugai() {
                console.log(this.int)
                let index = this.int
                console.log(this.name, this.price, this.count, )
                this.shopPings[index].name = this.name
                this.shopPings[index].price = this.price
                this.shopPings[index].counrty = this.counrty
                this.shopPings[index].count = this.count

                this.dis1 = false
            },
            //降序
            jiang() {
                this.shopPings.sort((a, b) => {
                    //排序基于的數(shù)據(jù)
                    return a.price - b.price;
                })
            },
            search() {
                if (!this.input_value) {
                    return alert('請(qǐng)輸入內(nèi)容')
                }
                if (
                    this.shopPings.every((v) => {
                        v.name.indexOf(this.input_value) == -1
                    })
                ) {
                    this.input_value = ''
                    return alert('沒(méi)有此商品')
                }
                this.shopPings = this.shopPings.filter((v) => {
                    v.name.replace(this.input_value, this.input_value)
                    return v.name.indexOf(this.input_value) != -1
                })
            }

        }
    }
</script>