Although the docs do provide some helpful information when using Declare, I still struggle a bit to understand a few things (specifically with regards to macOS).
As a result, a lot of the time I just copy and paste from either Sam’s AppKit or the macOSLib repo, when I need something not in the Xojo toolkit.
Question: Using Selector respondsToSelector: as an example, it appears this can be called with either Lib “Cocoa” or “Foundation”.
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Is this because the “Cocoa” framework encompasses all (or most) libraries in the macOS API? As the Apple literature suggests.
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If yes to the above, does that mean calling “Cocoa” routes the Selector request to “Foundation”?
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Or does
respondsToSelector:exist in both places and is potentially executing slightly different logic? -
And if
respondsToSelector:exists only in “Framework”, is there a performance difference calling “Cocoa” verses “Foundation” directly? Or something else important I’m missing?
// what's the difference besides what Lib is being called?
Declare Function respondsToSelector Lib "Cocoa" Selector "respondsToSelector:" (obj As Ptr, sel As Ptr) As Boolean
// verses
Declare Function respondsToSelector Lib "Foundation" Selector "respondsToSelector:" (obj As Ptr, sel As Ptr) As Boolean
Note: This post is about expanding my knowledge of Declare, and not about finding a Plugin solution (I already own both MBS & Einhugur).
Thank you.
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