/** index.js*/ var app = getApp() Page({ data: { /** * 页面配置 */ winWidth: 0, winHeight: 0, // tab切换 currentTab: 0, option1:[ {value:"1",contant:"A:xxxx"}, {value:"2",contant:"B:xxxx"}, {value:"3",contant:"C:xxxx"}, {value:"4",contant:"D:xxxx"} ], option2: [ { value: "1", contant: "A:xxxx" }, { value: "2", contant: "B:xxxx" }, { value: "3", contant: "C:xxxx" }, { value: "4", contant: "D:xxxx" } ], option3: [ { value: "1", contant: "A:xxxx" }, { value: "2", contant: "B:xxxx" }, { value: "3", contant: "C:xxxx" }, { value: "4", contant: "D:xxxx" } ], option1Value:0, option2Value:0, option3Value:0, }, onLoad: function() { swiperChange: function(e){ var that = this; if(that.data.currentTab==0){ that.setData({ option1Value : e.detail.value, currentTab: 1 }); }else if(that.data.currentTab==1){ that.setData({ option2Value : e.detail.value, currentTab: 2 }); }else if(that.data.currentTab==2){ that.setData({ option3Value : e.detail.value, currentTab: 3 }) } } })    第一题 第二题 第三题        {{item.contant}}        {{item.contant}}        {{item.contant}}     {{score}} 

以上是我的程式碼，想實現頁面中有三個題目，分別有四個不同分值的選項，用戶選擇後直接彈出結果，但是儲存用戶選擇的選項的JSON資料是字串，請問如何轉換為數字類型？