ios 如何在AFJSONRequestOperation的回调中从NSHTTPURLResponse中获取响应数据？
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How to get the response data out of the NSHTTPURLResponse in the callback of AFJSONRequestOperation?
提问by Todd Hopkinson
I have a situation where I need to access the raw response data for an AFJSONRequestOperation, from within the callback block which includes only NSHTTPURLResponse. I am able to get the statusCode from the NSHTTPURLResponse, but don't see any way to get to the raw data. Is there a good way that anyone knows of to access this from the failure callback block of this operation?
我有一种情况，我需要从仅包含 NSHTTPURLResponse 的回调块中访问 AFJSONRequestOperation 的原始响应数据。我能够从 NSHTTPURLResponse 中获取 statusCode，但看不到任何获取原始数据的方法。有没有人知道从这个操作的失败回调块访问它的好方法？
回答by mattt
NSHTTPURLResponseonly contains HTTP header information; no body data. So no, this would be impossible. If you have any control over this code, have the block or method pass the operation itself and get responseDataor responseJSON.
NSHTTPURLResponse只包含 HTTP 头信息；没有身体数据。所以不，这是不可能的。如果您对此代码有任何控制权，请让块或方法传递操作本身并获取responseData或responseJSON。
回答by spnkr
In the callback from responseJSONyou can get the body from a DataResponse<Any>object using response.result.valueor String(data:response.data!, encoding: .utf8).
在回调中，responseJSON您可以DataResponse<Any>使用response.result.value或从对象中获取主体String(data:response.data!, encoding: .utf8)。
You can't get it from response.response, which is a NSHTTPURLResponseobject. This only has header info.
你不能从response.response，它是一个NSHTTPURLResponse对象。这只有标题信息。
Alamofire.request(URL(string: "https://foo.com")!).validate(statusCode: 200..<300).responseJSON() { response in
let body = response.result.value
}
If the http response doesn't validate the above doesn't work. but this does:
如果 http 响应未验证上述内容不起作用。但这确实：
Alamofire.request(URL(string: "https://foo.com")!).validate(statusCode: 200..<300).responseJSON() { response in
let body = String(data:response.data!, encoding: .utf8)
}
回答by 7Cornelio
Old question, but anyway...
老问题，但无论如何......
You don't need to get to the operation object, you can easily do something like:
您不需要访问操作对象，您可以轻松执行以下操作：
NSData * data = [NSJSONSerialization dataWithJSONObject:JSON options:0 error:nil]];
With the JSON id that the callback receives.
使用回调接收的 JSON id。
