Ios 当对象具有内部对象时，如何将对象转换为JSON

我有一个自定义类对象，其中包含用户对象：

@interface Order : NSObject

@property (nonatomic, retain) NSString *OrderId;
@property (nonatomic, retain) NSString *Title;
@property (nonatomic, retain) NSString *Weight;
@property (nonatomic, retain) User *User
- (NSMutableDictionary *)toNSDictionary;
...
- (NSMutableDictionary *)toNSDictionary
{

    NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init];
    [dictionary setValue:self.OrderId forKey:@"OrderId"];
    [dictionary setValue:self.Title forKey:@"Title"];
    [dictionary setValue:self.Weight forKey:@"Weight"];

    return dictionary;
}

在

toNSDictinary

函数中，我没有映射

User

对象。

---

在这种情况下，将对象转换为

nsdictionary

的好方法是什么？

修改

toNSDictionary

方法：

- (NSMutableDictionary *)toNSDictionary
{

    NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init];
    [dictionary setValue:self.OrderId forKey:@"OrderId"];
    [dictionary setValue:self.Title forKey:@"Title"];
    [dictionary setValue:self.Weight forKey:@"Weight"];

    NSMutableDictionary *userDictionary = [NSMutableDictionary dictionary];
    [userDictionary setValue:self.User.someProperty1 forKey:@"someProperty1"];
    [userDictionary setValue:self.User.someProperty2 forKey:@"someProperty2"];
    [dictionary setValue:userDictionary forKey:@"User"];

    return dictionary;
}

为密钥设置字典时，请尝试使用

[dictionary   setObject: forKey: ]

---

清楚你的问题

[dictionary   setObject: forKey: ]