{"id":33448,"date":"2024-11-25T08:24:50","date_gmt":"2024-11-25T00:24:50","guid":{"rendered":"https:\/\/fwq.ai\/blog\/33448\/"},"modified":"2024-11-25T08:24:50","modified_gmt":"2024-11-25T00:24:50","slug":"%e5%be%ae%e4%bf%a1%e5%b0%8f%e7%a8%8b%e5%ba%8f%e4%b9%8b%e8%b4%ad%e7%89%a9%e8%bd%a6%e5%8a%9f%e8%83%bd%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/33448\/","title":{"rendered":"\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u4e4b\u8d2d\u7269\u8f66\u529f\u80fd\u5b9e\u73b0"},"content":{"rendered":"<h2>\u524d\u8a00<\/h2>\n<p style=\"line-height: 2em\">\u4ee5\u5f80\u7684\u8d2d\u7269\u8f66\uff0c\u57fa\u672c\u90fd\u662f\u901a\u8fc7\u5927\u91cf\u7684 DOM \u64cd\u4f5c\u6765\u5b9e\u73b0\u3002\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u5176\u5b9e\u8ddf vue.js \u7684\u7528\u6cd5\u975e\u5e38\u50cf\uff0c\u63a5\u4e0b\u6765\u5c31\u770b\u770b\u5c0f\u7a0b\u5e8f\u53ef\u4ee5\u600e\u6837\u5b9e\u73b0\u8d2d\u7269\u8f66\u529f\u80fd\u3002<\/p>\n<h2>\u9700\u6c42<\/h2>\n<p>\u5148\u6765\u5f04\u6e05\u695a\u8d2d\u7269\u8f66\u7684\u9700\u6c42\u3002<\/p>\n<ul>\n<li>\n<p>\u5355\u9009\u3001\u5168\u9009\u548c\u53d6\u6d88\uff0c\u800c\u4e14\u4f1a\u968f\u7740\u9009\u4e2d\u7684\u5546\u54c1\u8ba1\u7b97\u51fa\u603b\u4ef7<\/p>\n<\/li>\n<li>\n<p>\u5355\u4e2a\u5546\u54c1\u8d2d\u4e70\u6570\u91cf\u7684\u589e\u52a0\u548c\u51cf\u5c11<\/p>\n<\/li>\n<li>\n<p>\u5220\u9664\u5546\u54c1\u3002\u5f53\u8d2d\u7269\u8f66\u4e3a\u7a7a\u65f6\uff0c\u9875\u9762\u4f1a\u53d8\u4e3a\u7a7a\u8d2d\u7269\u8f66\u7684\u5e03\u5c40<\/p>\n<\/li>\n<\/ul>\n<p>\u6839\u636e\u8bbe\u8ba1\u56fe\uff0c\u6211\u4eec\u53ef\u4ee5\u5148\u5b9e\u73b0\u9759\u6001\u9875\u9762\u3002\u63a5\u4e0b\u6765\uff0c\u518d\u770b\u770b\u4e00\u4e2a\u8d2d\u7269\u8f66\u9700\u8981\u4ec0\u4e48\u6837\u7684\u6570\u636e\u3002<\/p>\n<ul>\n<li>\n<p>\u9996\u5148\u662f\u4e00\u4e2a\u5546\u54c1\u5217\u8868(carts)\uff0c\u5217\u8868\u91cc\u7684\u5355\u54c1\u9700\u8981\uff1a\u5546\u54c1\u56fe(image)\uff0c\u5546\u54c1\u540d(title)\uff0c\u5355\u4ef7(price)\uff0c\u6570\u91cf(num)\uff0c\u662f\u5426\u9009\u4e2d(selected)\uff0c\u5546\u54c1id(id)<\/p>\n<\/li>\n<li>\n<p>\u7136\u540e\u5de6\u4e0b\u89d2\u7684\u5168\u9009\uff0c\u9700\u8981\u4e00\u4e2a\u5b57\u6bb5(selectAllStatus)\u8868\u793a\u662f\u5426\u5168\u9009\u4e86<\/p>\n<\/li>\n<li>\n<p>\u53f3\u4e0b\u89d2\u7684\u603b\u4ef7(totalPrice)<\/p>\n<\/li>\n<li>\n<p>\u6700\u540e\u9700\u8981\u77e5\u9053\u8d2d\u7269\u8f66\u662f\u5426\u4e3a\u7a7a(hasList)<\/p>\n<\/li>\n<\/ul>\n<p>\u77e5\u9053\u4e86\u9700\u8981\u8fd9\u4e9b\u6570\u636e\uff0c\u5728\u9875\u9762\u521d\u59cb\u5316\u7684\u65f6\u5019\u6211\u4eec\u5148\u5b9a\u4e49\u597d\u8fd9\u4e9b\u3002<\/p>\n<p>\u4ee3\u7801\u5b9e\u73b0<\/p>\n<p>\u521d\u59cb\u5316<\/p>\n<pre>Page({\n    data: {\n        carts:[],               \/\/ \u8d2d\u7269\u8f66\u5217\u8868\n        hasList:false,          \/\/ \u5217\u8868\u662f\u5426\u6709\u6570\u636e\n        totalPrice:0,           \/\/ \u603b\u4ef7\uff0c\u521d\u59cb\u4e3a0\n        selectAllStatus:true    \/\/ \u5168\u9009\u72b6\u6001\uff0c\u9ed8\u8ba4\u5168\u9009\n    },\n    onShow() {\n        this.setData({\n          hasList: true,        \/\/ \u65e2\u7136\u6709\u6570\u636e\u4e86\uff0c\u90a3\u8bbe\u4e3atrue\u5427\n          carts:[\n            {id:1,title:'\u65b0\u9c9c\u82b9\u83dc \u534a\u65a4',image:'\/image\/s5.png',num:4,price:0.01,selected:true},\n            {id:2,title:'\u7d20\u7c73 500g',image:'\/image\/s6.png',num:1,price:0.03,selected:true}\n          ]\n        });\n      },\n})<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8d2d\u7269\u8f66\u5217\u8868\u6570\u636e\u6211\u4eec\u4e00\u822c\u662f\u901a\u8fc7\u8bf7\u6c42\u670d\u52a1\u5668\u62ff\u5230\u7684\u6570\u636e\uff0c\u6240\u4ee5\u6211\u4eec\u653e\u5728\u751f\u547d\u5468\u671f\u51fd\u6570\u91cc\u7ed9 carts \u8d4b\u503c\u3002\u60f3\u5230\u6bcf\u6b21\u8fdb\u5230\u8d2d\u7269\u8f66\u90fd\u8981\u83b7\u53d6\u8d2d\u7269\u8f66\u7684\u6700\u65b0\u72b6\u6001\uff0c\u800conLoad\u548conReady\u53ea\u5728\u521d\u59cb\u5316\u7684\u65f6\u5019\u6267\u884c\u4e00\u6b21\uff0c\u6240\u4ee5\u6211\u9700\u8981\u628a\u8bf7\u6c42\u653e\u5728 onShow \u51fd\u6570\u91cc\u3002(\u8fd9\u91cc\u5148\u62ff\u70b9\u5047\u6570\u636e\u5192\u5145\u4e00\u4e0b\u5427)<\/p>\n<p>\u5e03\u5c40 wxml<\/p>\n<p>\u4fee\u597d\u4e4b\u524d\u5199\u597d\u7684\u9759\u6001\u9875\u9762\uff0c\u7ed1\u5b9a\u6570\u636e\u3002<\/p>\n<pre> &lt;view class=\"cart-box\"&gt;\n    &lt;!-- wx:for \u6e32\u67d3\u8d2d\u7269\u8f66\u5217\u8868 --&gt;\n    &lt;view wx:for=\"{{carts}}\"&gt;\n    \n        &lt;!-- wx:if \u662f\u5426\u9009\u62e9\u663e\u793a\u4e0d\u540c\u56fe\u6807 --&gt;\n        &lt;icon wx:if=\"{{item.selected}}\" type=\"success\" color=\"red\" bindtap=\"selectList\" data-index=\"{{index}}\" \/&gt;\n        &lt;icon wx:else type=\"circle\" bindtap=\"selectList\" data-index=\"{{index}}\"\/&gt;\n        \n        &lt;!-- \u70b9\u51fb\u5546\u54c1\u56fe\u7247\u53ef\u8df3\u8f6c\u5230\u5546\u54c1\u8be6\u60c5 --&gt;\n        &lt;navigator url=\"..\/details\/details?id={{item.id}}\"&gt;\n            &lt;image class=\"cart-thumb\" src=\"{{item.image}}\"&gt;&lt;\/image&gt;\n        &lt;\/navigator&gt;\n        \n        &lt;text&gt;{{item.title}}&lt;\/text&gt;\n        &lt;text&gt;\uffe5{{item.price}}&lt;\/text&gt;\n        \n        &lt;!-- \u589e\u52a0\u51cf\u5c11\u6570\u91cf\u6309\u94ae --&gt;\n        &lt;view&gt;\n            &lt;text bindtap=\"minusCount\" data-index=\"{{index}}\"&gt;-&lt;\/text&gt;\n            &lt;text&gt;{{item.num}}&lt;\/text&gt;\n            &lt;text bindtap=\"addCount\" data-index=\"{{index}}\"&gt;+&lt;\/text&gt;\n        &lt;\/view&gt;\n        \n        &lt;!-- \u5220\u9664\u6309\u94ae --&gt;\n        &lt;text bindtap=\"deleteList\" data-index=\"{{index}}\"&gt; \u00d7 &lt;\/text&gt;\n    &lt;\/view&gt;\n&lt;\/view&gt;\n\n&lt;!-- \u5e95\u90e8\u64cd\u4f5c\u680f --&gt;\n&lt;view&gt;\n    &lt;!-- wx:if \u662f\u5426\u5168\u9009\u663e\u793a\u4e0d\u540c\u56fe\u6807 --&gt;\n    &lt;icon wx:if=\"{{selectAllStatus}}\" type=\"success_circle\" color=\"#fff\" bindtap=\"selectAll\"\/&gt;\n    &lt;icon wx:else type=\"circle\" color=\"#fff\" bindtap=\"selectAll\"\/&gt;\n    &lt;text&gt;\u5168\u9009&lt;\/text&gt;\n    \n    &lt;!-- \u603b\u4ef7 --&gt;\n    &lt;text&gt;\uffe5{{totalPrice}}&lt;\/text&gt;\n&lt;\/view&gt;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8ba1\u7b97\u603b\u4ef7<\/p>\n<p>\u603b\u4ef7 = \u9009\u4e2d\u7684\u5546\u54c11\u7684 \u4ef7\u683c * \u6570\u91cf + \u9009\u4e2d\u7684\u5546\u54c12\u7684 \u4ef7\u683c * \u6570\u91cf + &#8230;<br \/>\u6839\u636e\u516c\u5f0f\uff0c\u53ef\u4ee5\u5f97\u5230<\/p>\n<pre>getTotalPrice() {\n    let carts = this.data.carts;                  \/\/ \u83b7\u53d6\u8d2d\u7269\u8f66\u5217\u8868\n    let total = 0;\n    for(let i = 0; i&lt;carts.length; i++) {         \/\/ \u5faa\u73af\u5217\u8868\u5f97\u5230\u6bcf\u4e2a\u6570\u636e\n        if(carts[i].selected) {                   \/\/ \u5224\u65ad\u9009\u4e2d\u624d\u4f1a\u8ba1\u7b97\u4ef7\u683c\n            total += carts[i].num * carts[i].price;     \/\/ \u6240\u6709\u4ef7\u683c\u52a0\u8d77\u6765\n        }\n    }\n    this.setData({                                \/\/ \u6700\u540e\u8d4b\u503c\u5230data\u4e2d\u6e32\u67d3\u5230\u9875\u9762\n        carts: carts,\n        totalPrice: total.toFixed(2)\n    });\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u9875\u9762\u4e2d\u7684\u5176\u4ed6\u64cd\u4f5c\u4f1a\u5bfc\u81f4\u603b\u4ef7\u683c\u53d8\u5316\u7684\u90fd\u9700\u8981\u8c03\u7528\u8be5\u65b9\u6cd5\u3002<\/p>\n<p>\u9009\u62e9\u4e8b\u4ef6<\/p>\n<p>\u70b9\u51fb\u65f6\u9009\u4e2d\uff0c\u518d\u70b9\u51fb\u53c8\u53d8\u6210\u6ca1\u9009\u4e2d\u72b6\u6001\uff0c\u5176\u5b9e\u5c31\u662f\u6539\u53d8 selected \u5b57\u6bb5\u3002\u901a\u8fc7 data-index=&#8221;{{index}}&#8221; \u628a\u5f53\u524d\u5546\u54c1\u5728\u5217\u8868\u6570\u7ec4\u4e2d\u7684\u4e0b\u6807\u4f20\u7ed9\u4e8b\u4ef6\u3002<\/p>\n<pre>&lt;p&gt;selectList(e) {&lt;br\/&gt;    const index = e.currentTarget.dataset.index;    \/\/ \u83b7\u53d6data- \u4f20\u8fdb\u6765\u7684index&lt;br\/&gt;    let carts = this.data.carts;                    \/\/ \u83b7\u53d6\u8d2d\u7269\u8f66\u5217\u8868&lt;br\/&gt;    const selected = carts[index].selected;         \/\/ \u83b7\u53d6\u5f53\u524d\u5546\u54c1\u7684\u9009\u4e2d\u72b6\u6001&lt;br\/&gt;    carts[index].selected = !selected;              \/\/ \u6539\u53d8\u72b6\u6001&lt;br\/&gt;    this.setData({&lt;br\/&gt;        carts: carts&lt;br\/&gt;    });&lt;br\/&gt;    this.getTotalPrice();                           \/\/ \u91cd\u65b0\u83b7\u53d6\u603b\u4ef7&lt;br\/&gt;}&lt;br\/&gt;&lt;\/p&gt;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5168\u9009\u4e8b\u4ef6<\/p>\n<p>\u5168\u9009\u5c31\u662f\u6839\u636e\u5168\u9009\u72b6\u6001 selectAllStatus \u53bb\u6539\u53d8\u6bcf\u4e2a\u5546\u54c1\u7684 selected<\/p>\n<pre>&lt;p&gt;selectAll(e) {&lt;br\/&gt;    let selectAllStatus = this.data.selectAllStatus;    \/\/ \u662f\u5426\u5168\u9009\u72b6\u6001&lt;br\/&gt;    selectAllStatus = !selectAllStatus;&lt;br\/&gt;    let carts = this.data.carts;&lt;br\/&gt;&lt;br\/&gt;    for (let i = 0; i &lt; carts.length; i++) {&lt;br\/&gt;        carts[i].selected = selectAllStatus;            \/\/ \u6539\u53d8\u6240\u6709\u5546\u54c1\u72b6\u6001&lt;br\/&gt;    }&lt;br\/&gt;    this.setData({&lt;br\/&gt;        selectAllStatus: selectAllStatus,&lt;br\/&gt;        carts: carts&lt;br\/&gt;    });&lt;br\/&gt;    this.getTotalPrice();                               \/\/ \u91cd\u65b0\u83b7\u53d6\u603b\u4ef7&lt;br\/&gt;}&lt;br\/&gt;&lt;\/p&gt;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u589e\u51cf\u6570\u91cf<\/p>\n<p>\u70b9\u51fb+\u53f7\uff0cnum\u52a01\uff0c\u70b9\u51fb-\u53f7\uff0c\u5982\u679cnum &gt; 1\uff0c\u5219\u51cf1<\/p>\n<pre>&lt;p&gt;\/\/ \u589e\u52a0\u6570\u91cf&lt;br\/&gt;addCount(e) {&lt;br\/&gt;    const index = e.currentTarget.dataset.index;&lt;br\/&gt;    let carts = this.data.carts;&lt;br\/&gt;    let num = carts[index].num;&lt;br\/&gt;    num = num + 1;&lt;br\/&gt;    carts[index].num = num;&lt;br\/&gt;    this.setData({&lt;br\/&gt;      carts: carts&lt;br\/&gt;    });&lt;br\/&gt;    this.getTotalPrice();&lt;br\/&gt;},&lt;br\/&gt;\/\/ \u51cf\u5c11\u6570\u91cf&lt;br\/&gt;minusCount(e) {&lt;br\/&gt;    const index = e.currentTarget.dataset.index;&lt;br\/&gt;    let carts = this.data.carts;&lt;br\/&gt;    let num = carts[index].num;&lt;br\/&gt;    if(num &lt;= 1){&lt;br\/&gt;      return false;&lt;br\/&gt;    }&lt;br\/&gt;    num = num - 1;&lt;br\/&gt;    carts[index].num = num;&lt;br\/&gt;    this.setData({&lt;br\/&gt;      carts: carts&lt;br\/&gt;    });&lt;br\/&gt;    this.getTotalPrice();&lt;br\/&gt;}&lt;br\/&gt;&lt;\/p&gt;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5220\u9664\u5546\u54c1<\/p>\n<p>\u70b9\u51fb\u5220\u9664\u6309\u94ae\u5219\u4ece\u8d2d\u7269\u8f66\u5217\u8868\u4e2d\u5220\u9664\u5f53\u524d\u5143\u7d20\uff0c\u5220\u9664\u4e4b\u540e\u5982\u679c\u8d2d\u7269\u8f66\u4e3a\u7a7a\uff0c\u6539\u53d8\u8d2d\u7269\u8f66\u4e3a\u7a7a\u6807\u8bc6hasList\u4e3afalse<\/p>\n<pre>deleteList(e) {\n    const index = e.currentTarget.dataset.index;\n    let carts = this.data.carts;\n    carts.splice(index,1);              \/\/ \u5220\u9664\u8d2d\u7269\u8f66\u5217\u8868\u91cc\u8fd9\u4e2a\u5546\u54c1\n    this.setData({\n        carts: carts\n    });\n    if(!carts.length){                  \/\/ \u5982\u679c\u8d2d\u7269\u8f66\u4e3a\u7a7a\n        this.setData({\n            hasList: false              \/\/ \u4fee\u6539\u6807\u8bc6\u4e3afalse\uff0c\u663e\u793a\u8d2d\u7269\u8f66\u4e3a\u7a7a\u9875\u9762\n        });\n    }else{                              \/\/ \u5982\u679c\u4e0d\u4e3a\u7a7a\n        this.getTotalPrice();           \/\/ \u91cd\u65b0\u8ba1\u7b97\u603b\u4ef7\u683c\n    }   \n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 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