Question

我的Html：

<div class="graph-display" ng-controller="jsonServerBox">
    <div class="bar-chart-box" ng-repeat="module in ocw.modules"> 
        <canvas class="chart chart-bar" data="{{module.data}}" labels="{{module.labels}}" series="{{module.series}}"></canvas>
    </div>
</div>

我的JS：

app.controller('jsonServerBox', function($scope, $http) {
  var json = $http.get('serverbox.json').then(function(res){
          return res.data;
        });
  $scope.ocw = json;    
    });

图表没有显示，不知道为什么？我在控制台中也没有收到任何错误。

更新：我的JSON文件内容

[{"modules":[
            {
               "series":"SeriesA",
               "data":["90", "99", "80", "91", "76", "75", "60", "67", "59", "55"],
               "labels":["01", "02", "03", "04", "05", "06", "07","08","09","10"]
            },

            {
               "series":"SeriesB",
               "data":["90", "99", "80", "91", "76", "75", "60", "67", "59", "55"],
               "labels":["01", "02", "03", "04", "05", "06", "07","08","09","10"]
            }

    ]}
]

CONSOLE LOG：

modules: Array[2]0: Objectdata: Array[10]0: "90"1: "99"2: "80"3: "91"4: "76"5: "75"6: "60"7: "67"8: "59"9: "55"length: 10__proto__: Array[0]labels: Array[10]0: "01"1: "02"2: "03"3: "04"4: "05"5: "06"6: "07"7: "08"8: "09"9: "10"length: 10__proto__: Array[0]series: "SeriesA"__proto__: Object1: Objectdata: Array[10]0: "90"1: "99"2: "80"3: "91"4: "76"5: "75"6: "60"7: "67"8: "59"9: "55"length: 10__proto__: Array[0]labels: Array[10]0: "01"1: "02"2: "03"3: "04"4: "05"5: "06"6: "07"7: "08"8: "09"9: "10"length: 10__proto__: Array[0]series: "SeriesB"

Answer 1

代码的问题是json是Promise对象而不是从AJAX调用返回的数据。你的问题还有＃34;从AJAX请求返回＆＃34;方面。确保您了解相关问题，请查看this非常受欢迎的问题。

在Angular中使用AJAX请求设置范围数据的正确方法是在回调中进行：

app.controller('jsonServerBox', function ($scope, $http) {
    $http.get('serverbox.json').then(function (res) {
        $scope.ocw = res.data;
    });
});

Answer 2

在你的情况下，json变量只是包含 promise 对象。

应始终使用.then

解决Promise问题

<强> CODE

var json = $http.get('serverbox.json').then(function(res) {
    return res.data;
});
json.then(
  //success callback
  function(data) {
      $scope.ocw = data
  },
  //error callback
  function() {
      //error handling
  })
});

这会对你有帮助。

感谢。

使用ng-repeat {ANGULAR.JS}加载JSON以显示数据

2 个答案: