无法读取Google Geo Charts中未定义的属性'arrayToDataTable' [英] Cannot read property 'arrayToDataTable' of undefined at Google Geo Charts

问题描述

所以这是我在index.html上设置的. api密钥已在console.developers.google.com处生成，我不认为这引起了错误. 问题是arrayToDataTable是未定义的，我将它放在index.html上只是为了测试它是否可以工作，但是在我的实际应用程序中，它已分离为一个组件.

so this is my set up on my index.html. the api key has been generated at console.developers.google.com and I don't think that it was causing an error. the problem is the arrayToDataTable is undefined, I put it on my index.html just to test if this would work but in my real apps it was separated to a component.

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>

<script>
        google.charts.load('current', {
          'packages': ['geochart'],
          'mapsApiKey': 'AIzaSyC1PKyylEm8Xe0l0fnv81tuuUS-eOlrRCQ'
        });

        google.charts.setOnLoadCallback(drawStuff());

        function drawStuff() {
          var MapData = google.visualization.arrayToDataTable([
            ["Code", "Name", "Value"],
            ["PH-14", "Autonomous Region in Muslim Mindanao (ARMM)", 1],
            ["PH-05", "Bicol (Region V)", 2],
            ["PH-02", "Cagayan Valley (Region II)", 3],
            ["PH-40", "Calabarzon (Region IV-A)",4 ],
            ["PH-13", "Caraga (Region XIII)", 5],
            ["PH-03", "Central Luzon (Region III)", 6],
            ["PH-07", "Central Visayas (Region VII)", 7],
            ["PH-15", "Cordillera Administrative Region (CAR)", 8],
            ["PH-11", "Davao (Region XI)", 9],
            ["PH-08", "Eastern Visayas (Region VIII)", 10],
            ["PH-01", "Ilocos (Region I)", 11],
            ["PH-41", "Mimaropa (Region IV-B)", 12],
            ["PH-00", "National Capital Region Pambansang Punong", 13],
            ["PH-10", "Northern Mindanao (Region X)", 14],
            ["PH-12", "Soccsksargen (Region XII)", 15],
            ["PH-06", "Western Visayas (Region VI)", 16],
            ["PH-09", "Zamboanga Peninsula (Region IX)", 17]
          ]);


          console.log(MapData);

          // Set chart options
          var MapOptions = {
            'region': 'PH',
            'resolution': 'provinces',
            'title': 'How Much Pizza I Ate Last Night',
            'width': 400,
            'height': 300
          };

          // Instantiate and draw our chart, passing in some options.
          var chart = new google.visualization.GeoChart(document.getElementById('chartdiv'));
          chart.draw(MapData, MapOptions);
        };
    </script>

我真的不知道设置中缺少什么.

I really don't know what's missing in the set up.

推荐答案

首先，删除...中的括号.

First, remove the parentheses in ...

google.charts.setOnLoadCallback(drawStuff) // not drawStuff()

当带有括号时，您将传递调用函数的结果，但是API希望被赋予一个处理函数(而不是其结果).

When you have the parenthesis, you are passing the result of calling the function, but the API wants to be given a handler function (not its result).

此外，而不是...

["Code", "Name", "Value"],

...尝试使用标签语法，就像这样...

...try using the label syntax, like so...

[{label: 'Code', type: 'string'},
{label: 'Name', type: 'string'},
{label: 'Value', type: 'number'}],

API应该能够在不进行此更改的情况下解决问题，但这是按需提供"的更改，它也使代码更具自记录性.

The API should be able to figure it out without this change, but this is a "just-in-case-its-needed" sort of change that also makes the code more self-documenting.

这篇关于无法读取Google Geo Charts中未定义的属性'arrayToDataTable'的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！