微信小程序中，如何利用picker组件构建级联式下拉菜单？

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原文：本文字例为大家庭分享了微信小程序实现级联菜单的具体代码，供大家参考，具体内容如下：+ view + picker + bindchange=bindPickerChange0 + value={brandindex} + range={brands} + view class=picker + 品牌：{brands}+

修改后：大家庭分享了微信小程序实现级联菜单的代码示例，具体代码如下：+ view + picker + bindchange=bindPickerChange0 + value={brandindex} + range={brands} + view class=picker + 品牌：{brands}+

本文实例为大家分享了微信小程序实现级联菜单的具体代码，供大家参考，具体内容如下

<view > <picker bindchange="bindPickerChange0" value="{{brandindex}}" range="{{brands}}"> <view class="picker"> 品牌：{{brands[brandindex]}} </view> </picker> </view> <view > <picker bindchange="bindPickerChange1" value="{{index1}}" range="{{object}}"> <view class="picker"> 配件类别：{{object[index1]}} </view> </picker> </view>

data: { brands: [], objectArray: [ { brand:"博世", id: 0, array: ["博世喷油器配件", "博世传感器", "杰克赛尔配件", "博世油泵配件", "博世共轨管配件","博世泵喷嘴"] }, { brand: "德尔福", id: 1, array: ["德尔福喷油器配件", "德尔福传感器", "德尔福油泵", "德尔福共轨管配件", "德尔福滤清器", "德尔福电脑版ECU", "德尔福机油", "德尔福维修部件"] }, { brand: "卡特", id: 2, array: ["卡特传感器", "卡特C7C9泵喷嘴","卡特共轨配件"] }, { brand: "康明斯", id: 3, array: ["西康配件", "东风康明斯","福田康明斯"] } ], object:[], brandindex:0, index1:0 }, onLoad:function(){ var objectArray = this.data.objectArray var brands=[] for (var i = 0; i < objectArray.length;i++){ brands.push(objectArray[i].brand,) } this.setData({ brands: brands ,object: objectArray[this.data.brandindex].array}) }, bindPickerChange0: function (e) { this.setData({ brandindex: e.detail.value, index1:0 }) var objectArray = this.data.objectArray this.setData({ object: objectArray[this.data.brandindex].array}) }, bindPickerChange1: function (e) { this.setData({ index1: e.detail.value }) },

效果图：

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