小程序滚动选择器，做完联动后，无法滚动选择了

如何看待微信公开课小程序热门讨论「小程序滚动选择器，做完联动后，无法滚动选择了」
摘要：小程序滚动选择器，做完联动后，无法滚动选择了
展开：以下是我的代码.wxmlpickermodemultiSelectorrange{{multiRangeO}}rangekeynamebindchangemultiPickerAOChangebindcolumnchangemultiPickerAOColumnChange省市县联动/picker.jsdata:{multiRangeO:[]}onLoad:function(options){this.setData({multiRangeO:[[{id:0,name:北京},{id:1,name:上海},{id:2,name:天津},{id:3,name:重庆}],[{id:0,name:北京}],[{id:0,name:朝阳区},{id:1,name:海淀区},{id:2,name:东城区},{id:3,name:西城区}]]})}multiPickerAOColumnChange:function(e){console.log(e)varmultiRangeOthis.data.multiRangeOswitch(e.detail.column){case0:switch(e.detail.value){case0:multiRangeO.splice(1,1,[{id:0,name:北京}])multiRangeO.splice(2,1,[{id:0,name:朝阳区},{id:1,name:海淀区},{id:2,name:东城区},{id:3,name:西城区}])this.setData({multiRangeO:multiRangeO})console.log(this.data.multiRangeO)breakcase1:multiRangeO.splice(1,1,[{id:0,name:上海}])multiRangeO.splice(2,1,[{id:4,name:徐汇区},{id:5,name:长宁区},{id:6,name:静安区},{id:7,name:闸北区}])this.setData({multiRangeO:multiRangeO})console.log(this.data.multiRangeO)breakcase2:multiRangeO.splice(1,1,[{id:0,name:天津}])multiRangeO.splice(2,1,[{id:8,name:东丽区},{id:9,name:和平区},{id:10,name:河北区},{id:11,name:河东区}])this.setData({multiRangeO:multiRangeO})console.log(this.data.multiRangeO)breakcase3:multiRangeO.splice(1,1,[{id:0,name:重庆}])multiRangeO.splice(2,1,[{id:12,name:万州区},{id:13,name:涪陵区},{id:14,name:梁平县},{id:15,name:南川区}])this.setData({multiRangeO:multiRangeO})console.log(this.data.multiRangeO)break}break}}联动效果实现了，但是第二列和第三列无法滚动了，点击确定后e.detail.value[1,null,null]，如下图，求大神指教