DCKeyValueObjectMapping JSON 到对象映射错误

Question

在 Objective C 中，对于对象映射，我正在使用库 DCKeyValueObjectMapping

这是我的 class

#import <Foundation/Foundation.h>

@interface City : NSObject
@property(nonatomic, strong) NSString *id;
@property(nonatomic, strong) NSString *title;
@property(nonatomic, strong) NSString *slug;
@property(nonatomic) int country;
@property(nonatomic) Boolean isMain;
@property(nonatomic, strong) NSString *description;
@property(nonatomic, strong) NSString *position;
@property(nonatomic) Boolean isActive;
@property(nonatomic) Boolean isVisible;
@end

这是我解析响应的方式

- (void)getCities {
    NSURL *URL = [NSURL URLWithString:[NSString stringWithFormat:@"%@city/", APIURL]];

    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    [manager GET:URL.absoluteString
      parameters:nil
        progress:nil
         success:^(NSURLSessionTask *task, id responseObject) {
             DCParserConfiguration *config = [DCParserConfiguration configuration];
             DCKeyValueObjectMapping *parser = [DCKeyValueObjectMapping mapperForClass: [City class] andConfiguration: config];
             NSArray *cities = [parser parseArray: responseObject];
    }failure:^(NSURLSessionTask *operation, NSError *error) {
        NSLog(@"Error: %@", error.localizedDescription);
    }];
}

这是来自服务器的响应：

(
        {
        country = 1;
        description = 321;
        id = 1;
        "is_active" = 1;
        "is_main" = 0;
        "is_visible" = 1;
        position = "POINT (42.8760663999999991 74.5912887000000069)";
        slug = blabla;
        title = "\U0411\U0438\U0448\U043a\U0435\U043a";
    },
        {
        country = 1;
        description = 123;
        id = 2;
        "is_active" = 1;
        "is_main" = 0;
        "is_visible" = 1;
        position = "POINT (40.5266999999999982 72.8031000000000006)";
        slug = bloblo;
        title = "\U041e\U0448";
    }
)

当我调用此方法时，每次对象映射时应用程序都会崩溃。

调试信息如下：

*** 由于未捕获的异常 'NSUnknownKeyException' 而终止应用程序，原因：'[ setValue:forUndefinedKey:]：此 class 不符合密钥描述的键值编码。 '

将属性描述从 JSON 转换为对象时崩溃。我在这里做错了什么？

Answer 1

终于找到问题了

问题是，我在我的 class 中声明了属性 "description"，这与父 class 的属性冲突。在这种情况下，您声明属性的描述 Xcode 将显示一条警告消息。

要解决这个问题，需要在你的实现文件.m中添加一行代码：

@synthesize description;

DCKeyValueObjectMapping JSON 到对象映射错误

DCKeyValueObjectMapping JSON to Object mapping error

objective-c

ios

objectmapper