Angularjs 在圆环角图表中添加文本

Angularjs 在圆环角图表中添加文本,angularjs,chart.js,angular-chart,angular-chartist.js,Angularjs,Chart.js,Angular Chart,Angular Chartist.js,我在angularJS中使用angular-chart.js制作了一个油炸圈饼图 HTML文件: <div ng-app="App"> <div ng-controller="Controller"> <canvas id="pie33" options="options" class="chart chart-doughnut chart-xs ng-isolate-scope rotate" height="120" width="240" data="

我在angularJS中使用angular-chart.js制作了一个油炸圈饼图

HTML文件:

<div ng-app="App">
<div ng-controller="Controller">
    <canvas id="pie33" options="options" class="chart chart-doughnut chart-xs ng-isolate-scope rotate" height="120" width="240" data="pieDiskData.data" labels="pieDiskData.labels" colours="pieDiskData.colours" legend="true" ></canvas>
</div>
这是小提琴:

我需要在图形的中心添加一个文本,并删除图例和工具提示。请帮忙

此外,我还遇到了一个同样的angularJS指令。我想使用此指令创建图形。如果您能为同样的目标而工作,我们将不胜感激

谢谢

angular.module('App', ["chart.js"]);
angular.module('App').controller('Controller', ['$scope', '$http', '$location', '$window',

function ($scope, $http, $location, $window) {
$scope.options = {
    tooltipEvents: [],
    showTooltips: false,
    tooltipCaretSize: 0,
    scaleShowLabels: false,
    onAnimationComplete: function () {
        this.showTooltip(this.segments, true);
    },
};

var diskDataJson = {
    "data": [100, 100, 100, 100],
        "labels": ["red", "gree","blue","white"],
        "colours": ['#FF0000', '#008000','#0000FF', '#FFFFFF']
};

$scope.pieDiskData = diskDataJson;
}]);