Question

我有这个JSON（一个字典数组）：

[
    {"id":"BTCLTC","last":"89.767","high":"96.185","low":"25.000","bid":"89.729","ask":"91.320","volume":"29.78918","scale":3},
    {"id":"BTCUSD","last":"443.799","high":"444.092","low":"394.570","bid":"439.110","ask":"446.760","volume":"4.68266","scale":3},
    {"id":"BTCXRP","last":"98101.500","high":"98101.500","low":"86000.000","bid":"94999.050","ask":"97499.900","volume":"21.66779","scale":3}
]

我想使用RKObjectMappingMatcher来匹配"id":"BTCUSD"。

修改

感谢Wain的评论，使用RKObjectMapping足以让KVC验证起作用。验证方法由RestKit自动调用。

到目前为止我的代码看起来像：

RKObjectMapping *defaultMapping = [RKObjectMapping mappingForClass:class];

NSDictionary *attributeMappings = [query objectForKey:@"attributeMappings"];
[defaultMapping addAttributeMappingsFromDictionary:attributeMappings];

RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:dynamicMapping method:RKRequestMethodFromString(@"GET") pathPattern:@"/api/v1/markets" keyPath:@"" statusCodes:[NSIndexSet indexSetWithIndex:RKStatusCodeClassSuccessful]];
RKObjectManager *manager = [RKObjectManager managerWithBaseURL:url];
[manager addResponseDescriptor:responseDescriptor];

我添加了我认为对NSObject进行验证所必需的内容。

- (BOOL)validateCurrencyConversionID:(id *)ioValue error:(NSError **)outError
{
    if ([(NSString*)*ioValue length] == 0)
    {
        *outError = [NSError errorWithDomain:RKErrorDomain code:100 userInfo:@{@"description":@"Empty string"}];
        return NO;
    }
    else if ([((NSString*)*ioValue) rangeOfString:@"USD"].location == NSNotFound)
    {
        *outError = [NSError errorWithDomain:RKErrorDomain code:101 userInfo:@{@"description":@"Doesn't contain USD"}];
        return NO;
    }
    return YES;
}

Answer 1

不要使用这种方法，因为你不能适当地索引数组，因此你需要处理一个你期望字符串的数组。

相反，允许为每个映射运行映射，然后使用KVC validation中止您不想要的项目的映射。

使用KKC验证使用RestKit匹配JSON

1 个答案: