I am trying to build Objective-C static frameworks but ran into
hierarchy/organization problems.
For the question, assume I have 3 classes, classA, classB, and classC.
classB and classC are children classes of classA. classB and classC each
needs special resource files.
#import "classB.h"
#import "classC.h"
@implement classA
+ (classA)factoryMethodCreateType:(NSString *)type {
classA a;
if ([type isEqualToString:@"classB"]) {
a = [[classB alloc] init];
} else if ([type isEqualToString:@"classC"]) {
a = [classC alloc] init];
}
return a;
}
@end
I'd like to statically package the frameworks, classB.framework and
classC.framework, such that when a user wants to use classB, they don't
need to include classC and its resource files. Additionally, the user can
use classA as the entry point to use either of the frameworks.
I assume if I just create classB.framework (includes classA and classB) and
classC.framework (includes classA and classC), when the user wants to use
both types and include both frameworks, the user will face duplicate
symbols?
What is the best way to handle this situation? Is the following approach
the best way to do it?
Change classA's implementation to dynamic creation of classB or classC and
not include their header files.
Build 3 frameworks instead of 2: classA.framework, classB.framework,
classC.framework. When the user wants to use classB, the the user should
include both classA.framework and classB.framework.
@implement classA
+ (classA)factoryMethodCreateType:(NSString *)type {
classA a;
id obj = [NSClassFromString(type) alloc];
a = objc_msgSend(obj, @selector(init));
return a;
}
@end
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