How to define a global variable

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Ni2
Ni2 2019-10-22
评论： Steven Lord 2019-10-23
My app has many button with their own callbacks. I wanna define a variable inside one of such callbacks and i want to use it in other places including startupfcn, properties etc.

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回答（2 个）

KALYAN ACHARJYA
KALYAN ACHARJYA 2019-10-22
编辑：KALYAN ACHARJYA 2019-10-22
Steven Lord
Steven Lord 2019-10-22
While you can use global variables for this type of sharing, we recommend you use other techniques instead. See the "Share Data Within App Designer Apps" topic on this documentation page if you're using App Designer. If you're using GUIDE or creating the app programmatically, see the "Share Data Among Callbacks" topic on this documentation page.
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Ni2
Ni2 2019-10-22
Btw whats the difference between private and public property ?
Steven Lord
Steven Lord 2019-10-23
See the descriptions of the Access, GetAccess, and SetAccess property attributes in the documentation. These attributes control who can query and change the property's value and from where they can be queried or changed.
If you stored your name in a property of the you object, it would likely have public GetAccess (anyone can ask you for your name) but would not have public SetAccess (few people have the right to change your name.)
Your bank account number would not have public GetAccess (not everyone should be able to know that information.)

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