[英]Pop up openlayers
I am working on a map with different layers. 我正在处理具有不同图层的地图。 My goal would be to display the information of the layers with a pop up as explained in the tutorial of openlayer.
我的目标是按照openlayer 教程中的说明,通过弹出窗口显示层的信息。 However testing the code I get as output:
但是测试我得到的代码作为输出:
Uncaught TypeError: map.on is not a function
未捕获的TypeError:map.on不是函数
Can anyone help me? 谁能帮我?
map.on
is not a function means that you have a map variable and it either does not have an on
member, or, if it has, on
is not a function
. map.on
不是函数,意味着您具有map变量,并且它没有on
成员,或者,如果有,则on
不是function
。 Since the error is not telling you that you cannot use .on
of undefined
, we have to assume that map
is either incorrectly initialized or its initialization was not completed yet when you tried to call its on
. 由于误差不告诉你,你不能使用
.on
的undefined
,我们必须假设, map
要么不正确初始化或当你试图把它的调用它的初始化尚未完成on
。 This answer cannot give you any further information unless you specify your problem further. 除非您进一步指定问题,否则此答案不能为您提供任何更多信息。
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