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标题: ios - 使用 JSONModel 序列化自定义对象 [打印本页]

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作者: 菜鸟教程小白    时间: 2022-12-12 10:16
标题: ios - 使用 JSONModel 序列化自定义对象

我尝试使用适用于 iOS 的 JSONModel 框架从我的自定义对象中创建一个 JSON 文件。我得到错误:

-[JSONModel.m:1077] EXCEPTION: Invalid type in JSON write (RegisterBuyerDataOption)
-[JSONModel.m:1077] EXCEPTION: Invalid type in JSON write (RegisterBuyerDataOption)
-[JSONModel.m:1077] EXCEPTION: Invalid type in JSON write (RegisterBuyerData)

registerBuyerData.h

@interface RegisterBuyerData : JSONModel


@property (nonatomic, strong) NSString              *buyerDataID;
@property (nonatomic        ) RegisterBuyerDataType  type;
@property (nonatomic, strong) NSString<Optional>              *title;
@property (nonatomic        ) BOOL                   required;
@property (nonatomic, strong) NSString              *value;
@property (nonatomic)         NSNumber<Optional>              *price;
@property (nonatomic)         NSNumber<Optional>              *availability;

@property (nonatomic, strong) NSArray<RegisterBuyerData*>              *fields;  //array of more RegisterBuyerData
@property (nonatomic, strong) NSArray<RegisterBuyerDataOption*>        *options; //key,value array for dropDown

@property (nonatomic, strong) NSArray                                  *parentValue;
@property (nonatomic, strong) NSArray<RegisterBuyerData*>              *children; //array of more RegisterBuyerData but only for special selected value of an options field

- (BOOL) isAvailableForUser;

@end

registerBuyerData.m

@implementation RegisterBuyerData

- (BOOL) isAvailableForUser{

    return (!_availability || [_availability integerValue] > 0 );
}


+(JSONKeyMapper*)keyMapper
{
    return [[JSONKeyMapper alloc] initWithDictionary{@"id": @"buyerDataID",@"value": @"value"}];
}

@end

RegisterBuyerDataOption.h

@interface RegisterBuyerDataOption : JSONModel

@property (nonatomic, strong) NSString *key;
@property (nonatomic, strong) NSString *value;
@property (nonatomic, strong) NSNumber *price;
@property (nonatomic, strong) NSNumber *availability;

- (BOOL) isAvailableForUser;

@end

不能递归地创建 JSON 字符串吗？当我调用 toJSONString 方法时，我得到了这些错误。

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Best Answer-推荐答案

@property (nonatomic, strong) NSArray<RegisterBuyerData*> *fields;

应该是

@property (nonatomic, strong) NSArray<RegisterBuyerData> *fields;

所以去掉多余的*再试一次。

编辑:

哦，我明白了。似乎您尚未将要级联的类型声明为协议(protocol)。所以请执行以下操作

RegisterBuyerDataOption.h

@protocol RegisterBuyerDataOption @end;

@interface RegisterBuyerDataOption : JSONModel

@property (nonatomic, strong) NSString *key;
@property (nonatomic, strong) NSString *value;
@property (nonatomic, strong) NSNumber *price;
@property (nonatomic, strong) NSNumber *availability;

- (BOOL) isAvailableForUser;

@end

registerBuyerData.h

@protocol RegisterBuyerData @end;

@interface RegisterBuyerData : JSONModel


@property (nonatomic, strong) NSString              *buyerDataID;
@property (nonatomic        ) RegisterBuyerDataType  type;
@property (nonatomic, strong) NSString<Optional>              *title;
@property (nonatomic        ) BOOL                   required;
@property (nonatomic, strong) NSString              *value;
@property (nonatomic)         NSNumber<Optional>              *price;
@property (nonatomic)         NSNumber<Optional>              *availability;

@property (nonatomic, strong) NSArray<RegisterBuyerData*>              *fields;  //array of more RegisterBuyerData
@property (nonatomic, strong) NSArray<RegisterBuyerDataOption*>        *options; //key,value array for dropDown

@property (nonatomic, strong) NSArray                                  *parentValue;
@property (nonatomic, strong) NSArray<RegisterBuyerData*>              *children; //array of more RegisterBuyerData but only for special selected value of an options field

- (BOOL) isAvailableForUser;

@end

关于ios - 使用 JSONModel 序列化自定义对象，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35041651/

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