[英]FirebaseDB values in MIT App Inventor
How to set variables to Firebase DB values in MIT App Inventor? 如何在MIT App Inventor中将变量设置为Firebase DB值?
I tried with direct setting but the blocks cant match. 我尝试了直接设置,但块无法匹配。
Because getting values from an online database like firebase is asynchronous (it can take a second to complete), you have to ask for the values you want and wait for the database to give them to you. 由于从诸如firebase之类的在线数据库获取值是异步的(可能需要一秒钟才能完成),因此您必须询问所需的值,然后等待数据库将其提供给您。 See the screenshot below for an example.
有关示例,请参见下面的屏幕截图。
It would also help if you could please edit your question to provide some more information. 如果您可以编辑问题以提供更多信息,也会有所帮助。 You could include a screenshot of your relevant blocks or describe the problem more thoroughly.
您可以包括相关块的屏幕截图,也可以更彻底地描述问题。
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