修改checked值无法解决 wxml中 {{index + 1}} . {{datas[index].title}}     {{datas[index].items[0].value}}     {{datas[index].items[1].value}}     {{datas[index].items[2].value}}     {{datas[index].items[3].value}} 下一题 js中 var app = getApp();//用来将本页提取到app.js中的关键 Page({   data: {     index:0,     datas:[       {         "id":1,         "items":[           { "name": "A", "value": "A. 0" },           { "name": "B", "value": "B. 1" },           { "name": "C", "value": "C. 2" },           { "name": "D", "value": "D. 3" }         ],         "kind":"1",         "result":"C",         "title":"1+1=?"       },       {         "id": 2,         "items": [           { "name": "A", "value": "A. 0" },           { "name": "B", "value": "B. 1" },           { "name": "C", "value": "C. 2" },           { "name": "D", "value": "D. 3" }         ],         "kind": "1",         "result": "D",         "title": "1+2=?"       },     ]   }, //currIndex是下一题题号，currPage是当前页面对象   exam:function(){     console.log("index:"+this.data.index);     var currPage = this;     var currIndex = currPage.data.index + 1;     if(currIndex==5){       wx.redirectTo({         url: '/pages/result/result',       })     }     currPage.setData({       index:currIndex     });   },   onReady: function(){     app.examData.examDatas = this.data.datas;     console.log(app.examData.examDatas[0].title)   } })