Dynamic Instance Method ObjC

dynamic-instance-method.m

+ (BOOL)resolveInstanceMethod:(SEL)aSEL {
    NSString *classname = NSStringFromClass([self class]);
    NSString *selectorString = [NSString stringWithFormat:@"insaneInstance%@",classname];
    SEL ourSelector = NSSelectorFromString(selectorString);
    if (aSEL == ourSelector) {
        class_addMethod([self class], aSEL, (IMP)insaneInstanceMethod, "v@:");
        return YES;
    }
    return [super resolveInstanceMethod:aSEL];
}

void insaneInstanceMethod(id self, SEL _cmd) {
    NSLog(@"insane instance method has been added!");
}