Javascript 页面加载时未显示图表

我目前正在我的应用程序中使用角度图表。我创建了一个折线图，效果很好，但是当添加第二个图表（饼图）时，第一个图表不会显示在前端，直到我将鼠标悬停在它上面或调整窗口大小

我没有设置悬停事件，因此我不确定为什么会发生这种情况

这是我的控制器

app.controller('dashboardController', ['$scope', '$http', 'Page', 'authenticationService', function ($scope, $http, Page, authenticationService) {

// Page Setup
Page.setTitle('Dashboard');
Page.setSubTitle('Transport Overview');
$scope.$emit('pageLoading');

$http({
    url: '/api/dashboard/',
    method: 'GET',
    headers: authenticationService.getAuthToken(),
}).success(function (data) {

    $scope.dashboard = data;
    $scope.dashboard.revenuePerDayLabels = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];

    $scope.dashboard.weeklyJobIncome = [data.weeklyJobIncome];
    $scope.dashboard.weekVehicleRevenueLabels = [];
    $scope.dashboard.weekVehicleRevenueData = [];

    angular.forEach($scope.dashboard.weekVehicleRevenue, function (item) {
        $scope.dashboard.weekVehicleRevenueLabels.push(item.registrationNumber);
        $scope.dashboard.weekVehicleRevenueData.push(item.vehicleRevenue);
    });

    $scope.$emit('pageLoaded');
}).error(function () {
    $scope.$emit('pageLoaded');
});
}]);

和相应的HTML

折线图

<canvas id="line" class="chart chart-line"
        chart-data="dashboard.weeklyJobIncome"
        chart-labels="dashboard.revenuePerDayLabels"
        chart-series="series">
</canvas>

<canvas id="doughnut" class="chart chart-pie"
        chart-data="dashboard.weekVehicleRevenueData"
        chart-labels="dashboard.weekVehicleRevenueLabels">
</canvas>

饼图

<canvas id="line" class="chart chart-line"
        chart-data="dashboard.weeklyJobIncome"
        chart-labels="dashboard.revenuePerDayLabels"
        chart-series="series">
</canvas>

<canvas id="doughnut" class="chart chart-pie"
        chart-data="dashboard.weekVehicleRevenueData"
        chart-labels="dashboard.weekVehicleRevenueLabels">
</canvas>

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通过使用以下代码行设法解决该问题。这有点老套，但它在这种情况下有效

window.dispatchEvent(new Event('resize'));

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控制台是否显示页面加载错误？您看到了吗？有很多解决方案是人们成功的，但我没有。不，看看，这是我在这里面临的问题。信用：