NSURLResponse – 如何获取状态码？

我有一个简单的NSURLRequest：

[NSURLConnection sendAsynchronousRequest:myRequest queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) { // do stuff with response if status is 200 }]; 

如何获取状态码以确保请求正常？

Answer 1

从响应中投射一个NSHTTPURLResponse实例，并使用它的statusCode方法。

 [NSURLConnection sendAsynchronousRequest:myRequest queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) { NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response; NSLog(@"response status code: %ld", (long)[httpResponse statusCode]); // do stuff }]; 

Answer 2

在iOS 9的Swift中，你可以这样做：

 if let url = NSURL(string: requestUrl) { let request = NSMutableURLRequest(URL: url, cachePolicy: NSURLRequestCachePolicy.ReloadIgnoringLocalAndRemoteCacheData, timeoutInterval: 300) let config = NSURLSessionConfiguration.defaultSessionConfiguration() let session = NSURLSession(configuration: config) let task = session.dataTaskWithRequest(request, completionHandler: { (data, response, error) -> Void in if let httpResponse = response as? NSHTTPURLResponse { print("Status code: (\(httpResponse.statusCode))") // do stuff. } }) task.resume() } 

Answer 3

斯威夫特4

 let task = session.dataTask(with: request, completionHandler: { data, response, error -> Void in if let httpResponse = response as? HTTPURLResponse { print("Status Code: \(httpResponse.statusCode)") } }) task.resume()