jquery - Google Charts API 使用 $(document).ready 方法显示空白屏幕

Question

我有几个函数可以使用 Google Charts API 实例化各种图表。

当我在没有 jQuery$(document).ready方法的情况下调用它们时，一切正常。但是使用这种方法，我正在查看空白屏幕。

为什么？

<script type="text/javascript" src = "http://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.js" charset="utf-8"></script>
<script type="text/javascript" src = "http://www.google.com/jsapi" charset="utf-8"></script>
function drawColumnChart1(){..some code..}
function drawColumnChart2(){..some code..}
function drawGeoChart(){.some code..}

//This works fine.
google.load("visualization", "1", {packages:["piechart", "corechart", "geomap"]});
google.setOnLoadCallback(window.drawColumnChart1);
google.setOnLoadCallback(window.drawColumnChart2);
google.setOnLoadCallback(window.drawGeoChart);



//This doesn't work
$(document).ready(function(){
    google.load("visualization", "1", {packages:["piechart", "corechart", "geomap"]});
    google.setOnLoadCallback(window.drawColumnChart1);
    google.setOnLoadCallback(window.drawColumnChart2);
    google.setOnLoadCallback(window.drawGeoChart);
});

更新 这是我在 Firebug 中遇到的错误：

uncaught exception: [Exception... "Could not convert JavaScript argument"  nsresult: "0x80570009 (NS_ERROR_XPC_BAD_CONVERT_JS)"  location: "JS frame :: http://www.google.com/jsapi :: Q :: line 20"  data: no]
http://www.google.com/jsapi
Line 22

Answer 1

google.setOnLoadCallback 和 jQuery $(document).ready()，可以混用吗？

可能是最接近的答案，Ryan Wheale 对以下问题的回答也可能会有所帮助。

可以多次使用 google.setOnLoadCallback 吗？

Answer 2

根据谷歌可视化文档，您需要在onload 或 jquery 准备好之前加载可视化包。我建议在 jsapi 脚本引用之后立即加载，如下所示。

否则，您将得到 1) 未定义 google（参考错误）或 2) 如果使用 ajax 可能会出现空白响应和没有错误的空白页面。

加载顺序：（使用您的示例）

<script type="text/javascript" src = "http://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.js" charset="utf-8"></script>
<script type="text/javascript" src = "http://www.google.com/jsapi" charset="utf-8"></script>
<script type="text/javascript">
    google.load("visualization", "1", {packages:["piechart", "corechart", "geomap"]});
</script>

$(document).ready(function(){
    google.setOnLoadCallback(window.drawColumnChart1);
    google.setOnLoadCallback(window.drawColumnChart2);
    google.setOnLoadCallback(window.drawGeoChart);
});

Answer 3

这是我正在使用的范例。为 google.load 方法设置回调，并且根本不使用 google.setOnLoadCallback（AFAIK 这不是必需的）。

MyChart.prototype.render = function() {
    var self = this;
    google.load("visualization", 
                "1", 
                { callback: function() { self.visualize(); }, 
                  packages: ["corechart"] }
               );
}

MyChart.prototype.visualize = function() {

    var data = google.visualization.arrayToDataTable(
    [
        ['Year', 'Sales', 'Expenses'],  
        ['2004',  1000,      400],
        ['2005',  1170,      460],
        ['2006',  660,       1120],
        ['2007',  1030,      540]   
    ]);

    var options = {
        title: 'Company Performance',
        hAxis: {title: 'Year', titleTextStyle: {color: 'red'}}
    };

    var chart = new google.visualization.ColumnChart(document.getElementById("mychart_div"));    
    chart.draw(data, options);
}

Answer 4

嗨，那个解决方案对我不起作用，显然（我猜我不确定）当你在 jquery 对象中调用它时，谷歌库有一些范围问题，所以解决方案非常简单（虽然不是如此简单:s) 定义一个全局变量并分配谷歌库：

var localGoogle = google;

看起来很有趣吧:)...然后使用您定义的变量来调用setOnCallback，它对我有用，我希望它对你有用..

$(document).ready(function(){
    localGoogle.setOnLoadCallback(window.drawColumnChart1);
}

Answer 5

对于替代解决方案，您可以使用“自动加载”将所需的包包含在脚本标记中。这否定了对“google.setOnLoadCallback”的需要。

有关详细信息，请参阅https://developers.google.com/loader/#AutoLoading。

因此，您可以像平常一样从 jquery 文档就绪事件中执行所有操作。

还有一个向导可以为您设置 URL，但当前链接已损坏。无论如何，这里是：http ://code.google.com/apis/loader/autoloader-wizard.html

Answer 6

你必须调用 https://www.google.com/jsapi 而不是 http://www.google.com/jsapi

祝你好运

Answer 7

这对我有用：

google.load("visualization", "1", {packages:["corechart"],   
        callback:function(){drawChart();}});
        //google.setOnLoadCallback(drawChart);
        function drawChart() {
        console.log("enter draw");
              var data = google.visualization.arrayToDataTable([
   ['Year', 'value', { role: 'style' } ],
   ['2010', 10, ' color: gray'],
   ['2010', 200, 'color: #76A7FA'],
   ['2020', 16, 'opacity: 0.2'],
   ['2040', 22, 'stroke-color: #703593; stroke-width: 4; fill-color: #C5A5CF'],
   ['2040', 28, 'stroke-color: #871B47; stroke-opacity: 0.6; stroke-width: 8;  
     fill-color: #BC5679; fill-opacity: 0.2']
   ]);
              var view = new google.visualization.DataView(data);

              var options = {
                title: 'Company Performance',
                tooltip: {isHtml: false},
                legend: 'none',
              };

              var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));

              chart.draw(view, options);

        }

演示：jsfiddle

Answer 8

            <!DOCTYPE html>
            <html>
            <head>
            <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
            <script type="text/javascript" src="https://www.google.com/jsapi"></script>
            <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>
            <script type="text/javascript">

            google.load("visualization", "1", {packages:["corechart"]});
            function drawChart(gtitle,glabel,gwidth,gheight,gtype,gstart,gend,gid) {

                $.ajax({
                        url: "http://localhost/reporte/response.php",
                                type: "GET",
                                dataType: "JSON",
                                cache: false,
                                async: false,
                                data: {start:gstart,end:gend,id:gid},
                                success: function(data) {
                                    var len = 0;
                                    if (data.length)
                                    {
                                    len = data.length;
                                    }

                                    if(len > 0)
                                    {
                                    dataarray = [[gtitle,glabel]];
                                        for (var i = 0; i< len; i++) {
                                            dataarray.push([data[i].label,data[i].value]);
                                        }
                                    }
                                    else if(len==0)
                                    {

                                    }
                                },
                                error:function(data) 
                                {


                                }
                        });

                    var values = new google.visualization.arrayToDataTable(dataarray);
                    var options = {title: gtitle,width:gwidth,height:gheight};

                            switch(gtype){
                                case 'PieChart':
                                    var chart = new google.visualization.PieChart(document.getElementById('chart'));
                                    break;
                                case 'LineChart':
                                    var chart = new google.visualization.LineChart(document.getElementById('chart'));
                                    break;
                                case 'ColumnChart':
                                    var chart = new google.visualization.ColumnChart(document.getElementById('chart'));
                                    break;
                                case 'AreaChart':
                                    var chart = new google.visualization.ColumnChart(document.getElementById('chart'));
                                    break;
                            }

                    chart.draw(values, options);


            }






            $(document).ready(function(){
            //drawChart('Titulo del Grafico','Tickets',800,800,'PieChart',20141001,20141010,'procedure1');
            //drawChart('Titulo del Grafico','Tickets',400,400,'ColumnChart',20141001,20141010,'procedure2');
            //drawChart('Titulo del Grafico','Tickets',400,400,'LineChart',20141001,20141010,'procedure3');
            drawChart('Titulo del Grafico','Tickets',600,400,'AreaChart',20141001,20141010,'procedure4');
            });

            </script>
            </head>
            <body>

            <div id="chart"></div>

            </body>
            </html>

Answer 9

尝试关闭对ready?

$(document).ready(function(){
    ...
});
^^^