NSUrlConnectionDelegate - 获取http状态代码

Question

在iOS中，如何从Web服务器接收响应的http状态代码（404,500 200等）。我假设它在NSUrlConnectionDelegate中。

Objective-C或 Monotouch .NET回答确定。

Answer 1

是的，您可以在委托方法-didRecieveResponse中获取状态代码：

- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
   NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)response;
   int code = [httpResponse statusCode];
}

Answer 2

NSHTTPURLResponse* urlResponse = nil;
NSError *error = nil;
responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error];

aSynchronous请求也应该有办法获取NSHTTPURLResponse ..

您可以获得如下状态代码：

int statusCode = [urlResponse statusCode];
int errorCode = error.code;

在一些使用过多的错误代码（如404）的情况下，它将被置于错误中但使用不同的代码（401将为-1012）。

Answer 3

以下是如何在MonoTouch for .NET中为这些C＃用户执行此操作。它位于 NSUrlConnectionDelegate 。

中

public override void ReceivedResponse (NSUrlConnection connection, NSUrlResponse response)
{
  if (response is NSHttpUrlResponse)
  {
    var r = response as NSHttpUrlResponse;
    Console.WriteLine (r.StatusCode);
   }
}

Answer 4

查看this other stackoverflow question，您似乎可以在- (void)connection:(NSURLConnection *)aConnection didReceiveResponse:(NSURLResponse *)response委托方法中处理http状态代码：

- (void)connection:(NSURLConnection *)aConnection didReceiveResponse:(NSURLResponse*)response 
{
    if ([response isKindOfClass: [NSHTTPURLResponse class]])
        statusCode = [(NSHTTPURLResponse*) response statusCode];
}