A quick and dirty example of loading classes at runtime

ChatKitLoader.m

#import <dlfcn.h>     // for dlopen()
#import "MirrorKit.h" // pod 'MirrirKit'


- (NSArray<NSString *> *)chatKitClassNames {
    // Load the framework, close the handle. Now you can use any ChatKit class if you know its name.
    void *handle = dlopen("/System/Library/PrivateFrameworks/ChatKit.framework/ChatKit", RTLD_NOW);
    dlclose(handle);
    
    // Making use of the Objc runtime to get the classes
    NSArray *classes = [NSObject allSubclasses];
    
    classes = [classes filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(id class, NSDictionary *bindings) {
        return [NSStringFromClass(class) hasPrefix:@"CK"];
    }]];
    
    NSMutableArray *names = [NSMutableArray array];
    for (Class cls in classes)
        [names addObject:NSStringFromClass(cls)];
    
    return names;
}