Question

我有两个文件如下：

trycapture.js (which has) trycapture() (which has) drawaggregate() definition
main.js from which I want to call drawaggregate();

trycapture.js

trycapture(){
... some code
function drawaggregate(){
... definition
   }
}

main.js

.. some variables
var try_obj = new trycapture();
try_obj.drawAggregate(emit_x1,emit_y1,emit_x2,emit_y2);

HTML

<head>
<script src="trycapture.js"></script>
<script src="js/main.js"></script>
</head>

如何调用该功能。我在调用drawaggregation（）之前尝试创建一个对象，如上所述：

我仍然收到错误：

TypeError：try_obj.drawaggregate不是函数

另外，在index.html中我确保在main.js之前包含trycapture.js如何调用该函数？

Answer 1

添加

this.drawaggregate = drawaggregate;

在函数定义之后

使其成为trycapture对象的公共方法。

总的来说，您将把trycapture.js更改为以下内容：

function trycapture(){
    ... some code

    // Locally accessible only
    function drawaggregate(){
        ... definition
    }
    this.drawaggregate = drawaggregate; // Makes it publicly accessible also
}

然后可以像这样调用drawaggregate()方法：

var try_obj = new trycapture();
try_obj.drawaggregate();

如何调用另一个函数内的函数javascript

1 个答案: