图表显示未定义的角度图

Question

我正在使用angular-chart.js在我的应用程序中绘制图表。但是我面临一个问题。图表图例显示未定义而不是标签。

我JS代码：

 $scope.labels_std = ['Total Students', 'Submitted fee', 'Has to submit']; 
     $scope.options = {legend: {display: true, position: 'bottom'}}; 
     $scope.colors = ['#4D5360', '#949FB1', '#97BBCD']; 
     $scope.data_std = [ 
        $scope.allCount.students, 
        $scope.allCount.fees, 
        $scope.allCount.students - $scope.allCount.fees 
       ]; 

标记为：

<canvas id="bar" class="chart chart-bar" chart-labels="labels_std" chart-data="data_std" chart-colors="colors" chart-options="options"></canvas> 

但结果是这样的：

Answer 1

它显示undefined，因为您尚未为数据集定义label属性。

您需要在每个数据集的$scope.datasetOverride模型中设置label属性。另外，在你的视图标记中添加指令。

ᴡᴏʀᴋɪɴɢᴇxᴀᴍᴘʟᴇ

var app = angular.module('app', ['chart.js']); 
 

 
app.controller("BarCtrl", function($scope) { 
 
    $scope.labels = ['Total Students', 'Submitted fee', 'Has to submit']; 
 
    $scope.colors = ['#4D5360', '#949FB1', '#97BBCD']; 
 
    $scope.std = 65, $scope.fee = 59, $scope.nfee = 80; 
 
    $scope.data = [ 
 
     [$scope.std, $scope.fee, $scope.nfee], 
 
     [$scope.std, $scope.fee, $scope.nfee], 
 
     [$scope.std, $scope.fee, $scope.nfee] 
 
    ]; 
 
    $scope.options = { 
 
     legend: { 
 
     display: true 
 
     } 
 
    } 
 
    $scope.datasetOverride = [{ 
 
     label: 'My First Dataset' 
 
    }, { 
 
     label: 'My Second Dataset' 
 
    }, { 
 
     label: 'My Third Dataset' 
 
    }]; 
 
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script> 
 
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.min.js"></script> 
 
<script src="https://cdn.jsdelivr.net/angular.chartjs/latest/angular-chart.min.js"></script> 
 
<div ng-app="app" ng-controller="BarCtrl"> 
 
    <canvas id="bar" class="chart chart-bar" chart-data="data" chart-colors="colors" chart-labels="labels" chart-series="series" chart-options="options" chart-dataset-override="datasetOverride"></canvas> 
 
</div>