Select the number of components small program -picker

 

    <!-- detail.wxml -->
    <view class="picker">
        <picker range="{{range}}" bindchange="pickerChange">
            选择数量：
            <text>{{num}}</text>
        </picker>
    </view>// detail.js    Page({
        data:{
            range: [ 1, 2, 3, 4, 5, 6, 7, 8, 9],
            num:0,
        },
        pickerChange(e){var rangeIndex=e.detail.value;   // 下标this.setData({
                num: this.data.rigorous [strict index] 
    })
        }
            })