如何获得状态代码？

我有个简单的要求:

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

如何获取状态代码以确保请求正常？

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最佳答案

Cast an instance of NSHTTPURLResponse from the response and use its statusCode method.

[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
}];

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In Swift with iOS 9 you can do it this way:

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()
}

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Swift 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()