json响应被解释为text / plain

Question

我有以下代码：

NSURL *URL = [NSURL URLWithString:[@"some-address"]];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];

RKObjectRequestOperation *requestOperation = [[RKObjectRequestOperation alloc] initWithRequest:request responseDescriptors:[self.objectManager responseDescriptors]];

[requestOperation start];
[requestOperation waitUntilFinished];

我收到以下错误。

Object request failed: Underlying HTTP request operation failed with error: Error Domain=AFNetworkingErrorDomain Code=-1016 "Expected content type {(
    "application/x-www-form-urlencoded",
    "application/json"
)}, got text/plain" UserInfo=0x1f5e3c40 {NSLocalizedRecoverySuggestion={"total_rows":16,"offset":1,"rows":[

{"id":"1","key":1,"value":{"_id":"1","_rev":"1-e75042683867a7030fc4d3aa3b72ef35",
"user":{
"userId":"1",
"name":"A",
.......
]}}, .....

当响应采用Json格式时，为什么会出现此错误？

Answer 1

我们做到了。刚设置

[RKMIMETypeSerialization registerClass:[RKXMLReaderSerialization class] forMIMEType:@"text/plain"];

如果您使用的是JSON而不是XML（我们的情况是XML），请随意使用RKNSJSONSerialization类更改RKXMLReaderSerialization类。

Answer 2

您没有在响应中正确设置mime类型标头。请注意，错误为got text/plain，而代码期待application/json或application/x-www-form-urlencoded。