Again, a big thanks to Jens and Alex for help and inspiration!
In the end, the solution was to pray for a miracle, then have it happen!
I have no idea what I finally did to get the link to work, but all of a
sudden all my custom frameworks link just fine. Sigh.
---
I'd like to share some of what I (painfully) learned about custom
framework over the past few days:
- if you have more configurations in your app than in the framework, you
need to use a "mapping" trick to get the non-standard configs to link to
either Release or Debug: http://stackoverflow.com/a/21579912/1633251
- in the Umbrella header, included headers must be located in the Public
folder, and you reference them within the Umbrella header as
#import <ModuleName/Header.h>
- the Export file (EXPORTED_SYMBOLS_FILE) **does** work - I just didn't
have enough classes defined in my project to verify that it was. Per
Jen's advice, Objective C classes should be specified as:
.objc_class_name_MyClassName
- if you want Lazy loading - that is, you want the framework to load
when needed and not at launch, it **must** be marked as Optional:
"A Required framework will always be loaded into memory, but an Optional
framework will be loaded only if needed. The initial load of the
application will be faster if a large library that is never [* I assume
this also means rarely *] needed is designated as Optional."
The above buried in the following link (but not in the "Frameworks Guide!):
https://developer.apple.com/library/ios/recipes/xcode_help-project_editor/Articles/AddingaLibrarytoaTarget.html
I observe that in Debug, custom Optional frameworks load immediately
upon launch. In Release I observed that they loaded lazily. To uncover
when the load does occur, add a class method to one of your framework's
classes:
+ (void)load {
NSLog(@"!!! JUST LOADED BLAH BLAH !!!");
}
This is a good thing to do so you uncover unexpected loads.
- David
PS: I plan to find out whether marking some of my included Apple
frameworks as "Optional" might reduce launch time (and memory
consumption) - my app has a slew of them.
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