使用RESTKit映射服務器錯誤

Question

我成功使用RESTKit來訪問Web服務。但我有問題將服務器錯誤（如404,403 ...）映射到RESTKit的標準RKErrorMessage類。比方說，我從我的服務提出了以下JSON響應一個403個狀態碼在一起：

{"errors":{"message":"Some error message"}} 

在我的iOS應用程序，我嘗試錯誤的幫助下圖：

RKObjectMapping *errorMapping = [RKObjectMapping mappingForClass:[RKErrorMessage class 
[errorMapping addPropertyMapping:[RKAttributeMapping 
    attributeMappingFromKeyPath:@"message" toKeyPath:@"message"]]; 

statusCodes4xx = RKStatusCodeIndexSetForClass(RKStatusCodeClassClientError); 

errorDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:notecardMapping 
        pathPattern:nil keyPath:@"errors" statusCodes:statusCodes4xx]; 

但所有我get是從RESTkit發出的錯誤：

Failed mapping operation: No mappable values found for any of the attributes or relationship mappings 

我的錯在哪裏？例如，它在描述符中只是一個錯誤的路徑？

Answer 1

您似乎在回覆描述符中使用了notecardMapping而不是errorMapping。試試這個：

RKObjectMapping *errorMapping = [RKObjectMapping mappingForClass:[RKErrorMessage class]]; 

[errorMapping addPropertyMapping:[RKAttributeMapping attributeMappingFromKeyPath:nil toKeyPath:@"errorMessage"]]; 

RKResponseDescriptor *errorDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:errorMapping 
                       pathPattern:nil 
                        keyPath:@"errors.message" 
                       statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassClientError)]; 

[manager addResponseDescriptorsFromArray:@[errorDescriptor]];