模型转字典

//模型转字典
- (NSDictionary *)dicFromObject:(NSObject *)object {
    NSMutableDictionary *dic = [NSMutableDictionary dictionary];
    unsigned int count;
    objc_property_t *propertyList = class_copyPropertyList([object class], &count);
    
    for (int i = 0; i < count; i++) {
        objc_property_t property = propertyList[i];
        const char *cName = property_getName(property);
        NSString *name = [NSString stringWithUTF8String:cName];
        NSObject *value = [object valueForKey:name];//valueForKey返回的数字和字符串都是对象
        
        if ([value isKindOfClass:[NSString class]] || [value isKindOfClass:[NSNumber class]]) {
            //string , bool, int ,NSinteger
            [dic setObject:value forKey:name];
            
        } else if ([value isKindOfClass:[NSArray class]]) {
            //数组或字典
            [dic setObject:[self arrayWithObject:value] forKey:name];
        } else if ([value isKindOfClass:[NSDictionary class]]) {
            //数组或字典
            [dic setObject:[self dicWithObject:value] forKey:name];
        } else if (value == nil) {
            //null
            //[dic setObject:[NSNull null] forKey:name];//这行可以注释掉?????
        } else {
            //model
            [dic setObject:[self dicFromObject:value] forKey:name];
        }
    }
    
    return [dic copy];
}

//转数组
- (NSArray *)arrayWithObject:(id)object {
    //数组
    NSMutableArray *array = [NSMutableArray array];
    NSArray *originArr = (NSArray *)object;
    if ([originArr isKindOfClass:[NSArray class]]) {
        for (NSObject *object in originArr) {
            if ([object isKindOfClass:[NSString class]]||[object isKindOfClass:[NSNumber class]]) {
                //string , bool, int ,NSinteger
                [array addObject:object];
            } else if ([object isKindOfClass:[NSArray class]]) {
                //数组或字典
                [array addObject:[self arrayWithObject:object]];
            } else if ([object isKindOfClass:[NSDictionary class]]) {
                //数组或字典
                [array addObject:[self dicWithObject:object]];
            } else {
                //model
                [array addObject:[self dicFromObject:object]];
            }
        }
        return [array copy];
    }
    return array.copy;
}

//转字典类型
- (NSDictionary *)dicWithObject:(id)object {
    //字典
    NSDictionary *originDic = (NSDictionary *)object;
    NSMutableDictionary *dic = [NSMutableDictionary dictionary];
    if ([object isKindOfClass:[NSDictionary class]]) {
        for (NSString *key in originDic.allKeys) {
            id object = [originDic objectForKey:key];
            if ([object isKindOfClass:[NSString class]]||[object isKindOfClass:[NSNumber class]]) {
                //string , bool, int ,NSinteger
                [dic setObject:object forKey:key];
            } else if ([object isKindOfClass:[NSArray class]]) {
                //数组或字典
                [dic setObject:[self arrayWithObject:object] forKey:key];
            } else if ([object isKindOfClass:[NSDictionary class]]) {
                //数组或字典
                [dic setObject:[self dicWithObject:object] forKey:key];
            } else {
                //model
                [dic setObject:[self dicFromObject:object] forKey:key];
            }
        }
        return [dic copy];
    }
    return dic.copy;
}

https://www.jianshu.com/p/8e340363ae8f