An app can make internal use of NSNotificationCenter for different parts to communicate with each other, but can this be extended such that different frameworks can use it to communicate on iOS?
Can NSNotificationCenter be used between different frameworks to communicate?
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In the same app, frameworks all get executed on the same process. They just locate at different places in memory allocated by the app.
On the same running process,
NSNofitcationCentercan communicate with each other no matter which framework the sender or receiver locates at.If you are talking about app and its extension, they run on different process and thus
NSNofitcationCentercan not send notification to each other. You have to useCFNotificationCenter