使用setValue:forKey将RESTful JSON对象转换为Application Objects?

时间:2015-09-09 06:13:35

标签: ios objective-c json rest key-value-coding

使用setValue:forKey转换应用程序对象

在我的应用程序中,我创建了一个Patient类(NSObject的子类)

患者的JSON对象如下所示

{
"id":1,
"firstName":"Angel ",
"lastName":"Merkel",
"dob":"1989-08-31",
"address":"12 th, Cross street,"
"email":"merkal@gmail.com",
"cellNumber":"213-52578522”,
”ssn":"","maritalStatus":null,
"state":null,
"regularSmoker":false
}

所以我在下面列出的 patient.h 中创建了属性,就像JSON属性名称和属性名称相同(这样我就可以使用setValueForKey

@property(nonatomic,assign)int idValue;// we cant declare property with name id
@property(nonatomic,strong)NSString *firstName;
@property(nonatomic,strong)NSString *lastName;
@property(nonatomic,strong)NSDate *dob;
@property(nonatomic,strong)NSString *address;
@property(nonatomic,strong)NSString *email;
@property(nonatomic,strong)NSString *cellNumber;
@property(nonatomic,strong)NSString *ssn;
@property(nonatomic,strong)NSString *maritalStatus;
@property(nonatomic,strong)NSString *state;
@property(nonatomic,strong)NSString *regularSmoker;

我使用setValuesForKeysWithDictionary:方法将单个JSON对象转换为单个Application患者对象

转换时我必须处理以下两个问题

问题1 如果从服务器发送任何不需要的数据,请准备处理setvalueForUnIdentified密钥

-(void)setValue:(id)value forUndefinedKey:(NSString *)key
{
    NSLog(@"tried to set %@ for Object %@",key,self);
    [self.undefinedKeyValues setValue:value forKey:key]; // so that the unexpected key:value pairs stored
}

问题2 从JSON对象(例如

)转换为应用程序中的便捷数据类型
  • NSStringNSDate输入关键字“dob”的对象

  • 密钥“id”的
  • NSNumber到“int”类型

如下面的代码

-(void)setValue:(id)value forKey:(NSString *)key
{
    if([key isEqualToString:@“id”])
    {
        self.idValue=[value intValue];
    }
    else if ([key isEqualToString:@"gender"])
    {
        _gender=value;
       // Problem 2 handled
        if([value isEqualToString:@"Male"]) 
        {
            self.genderType=MALE;


        }
        else if ([value isEqualToString:@"Female"])
        {
            self.genderType=FEMALE;

        }
    }
    else if ([key isEqualToString:@“dob”])
    {
        /// convert the value to NSDate and assign
    }
    else
    {
        [super setValue:value forKey:key];
    }
}

我的问题是,我可以使用上述方法将JSON对象转换为应用程序对象吗?

0 个答案:

没有答案