环形图 以及作用域问题

2018年1月3日
遇到一个问题 $scope.data={};
只要是方法体{}内才有效。以外无效    // 环形图
  Services.getData('user/accountDetail.html',$scope.accountSend, function(data) {
      $scope.accountDetail = data.data;
      $scope.moneyTenderFreeze = $scope.accountDetail.moneyTenderFreeze;
      $scope.XXX= $scope.accountDetail.XXX;
      $scope.moneyUsable = $scope.accountDetail.moneyUsable;
      sessionStorage.moneyUsable = $scope.accountDetail.moneyUsable;
      sessionStorage.banckName = $scope.accountDetail.bank;
      sessionStorage.bankCard = $scope.accountDetail.bankCard;
      // 环形图
      var ctx = document.getElementById("myChart").getContext("2d");
      $scope.doughnutdata = [
        {
          value: $scope.moneyTenderFreeze,
          color:"#FEAA35"
        },
        {
          value : $scope.yonglibao,
          color : "#17B6F9"
        },
        {
          value : $scope.moneyUsable,
          color : "#00F889"
        }
      ]
      var options = {
        segmentShowStroke : false,
        segmentStrokeColor : "#fff",
        segmentStrokeWidth : 0,
        percentageInnerCutout : 35,
        animation : false,
        animationSteps : 100,
        animationEasing : "easeOutBounce",
        animateRotate : true,
        animateScale : false,
        onAnimationComplete : null
      }
      new Chart(ctx).Doughnut($scope.doughnutdata,options);
    })