gistfile1.txt

- (NSArray *)allKeys {
    NSMutableArray *result;
    NSMutableArray *classList;
    
    classList = [[NSMutableArray alloc] init];
    result = [[NSMutableArray alloc] init];                                  
    
    Class cls = [self class];
    Class nsObjectClass = [NSObject class];
    
    while (cls != nsObjectClass) {
        const char *className = class_getName(cls);
        NSLog(@"%@", [NSString stringWithCString:className encoding:NSUTF8StringEncoding]);
        [classList addObject:cls];
        cls = [cls superclass];
    }
    
    unsigned int propertyCount = 0;
    
    for (Class cls in classList) {
        objc_property_t *properties = class_copyPropertyList(cls, &propertyCount);

        for (unsigned int i = 0; i < propertyCount; ++i) {
            objc_property_t property = properties[i];
            const char *name = property_getName(property);
            NSString *key = [NSString stringWithUTF8String:name];
            
            [result addObject:key];
            
        }
        
        free(properties);
    }

    return result;
}