注：如果是int而不是NSNumber,則kvc時自動轉化為NSNumber，所以不必擔心！！！

- (MyObject *)objectFromDic:(NSDictionary *)dic {
    MyObject *o = [[MyObject alloc] init];
    
    if (dic == nil || [dic count] == 0) {
        return nil;
    }
    
    id viewClass = objc_getClass("MyObject");
    unsigned int outCount;
    objc_property_t *properties = class_copyPropertyList(viewClass, &outCount);
    for (int i = 0; i < outCount; i++) {
        objc_property_t property = properties[i];
        NSString *name = [NSString stringWithUTF8String:property_getName(property)];
//        printf("%s , %s \n", property_getName(property), property_getAttributes(property));
        if ([dic objectForKey:name]) {
            [o setValue:[dic objectForKey:name] forKey:name];
        }
    }
    
    free(properties);
    return o;
}

- (NSDictionary *)dicFromObject:(MyObject *)object {
    NSMutableDictionary *dic = [NSMutableDictionary dictionary];
    
    id viewClass = objc_getClass("MyObject");
    unsigned int outCount;
    objc_property_t *properties = class_copyPropertyList(viewClass, &outCount);
    for (int i = 0; i < outCount; i++) {
        objc_property_t property = properties[i];
        
        NSString *name = [NSString stringWithUTF8String:property_getName(property)];
        id value = [object valueForKey:name];
        
        if (value) {
            [dic setObject:value forKey:name];
        }
    }
    
    free(properties);
    return [NSDictionary dictionaryWithDictionary:dic];
}