gistfile1.txt

- (void)checkConnectionWithError:(NSError *)error {

	CWDURLSessionManagerState state = CWDURLSessionManagerStateConnected;

	NSNumber *errorCode = @(error.code);
	if ([[self noInternetErrorCodes] containsObject:errorCode])
		state = CWDURLSessionManagerStateNotConnected;

	if (self.state == state) return;

	dispatch_async(dispatch_get_main_queue(), ^{
		self.state = state;
	});
}

- (NSArray *)noInternetErrorCodes {
	static NSArray *noInternetErrorCodes;
	static dispatch_once_t onceToken;
	dispatch_once(&onceToken, ^{
		noInternetErrorCodes = @[
			@(NSURLErrorCannotFindHost),
			@(NSURLErrorCannotConnectToHost),
			@(NSURLErrorNetworkConnectionLost),
			@(NSURLErrorDNSLookupFailed),
			@(NSURLErrorHTTPTooManyRedirects),
			@(NSURLErrorResourceUnavailable),
			@(NSURLErrorNotConnectedToInternet),
			@(NSURLErrorRedirectToNonExistentLocation),
			@(NSURLErrorInternationalRoamingOff),
			@(NSURLErrorCallIsActive),
			@(NSURLErrorDataNotAllowed),
			@(NSURLErrorSecureConnectionFailed),
			@(NSURLErrorCannotLoadFromNetwork)
		];
	});
	return noInternetErrorCodes;
}

- (void)setState:(CWDURLSessionManagerState)state {

	if (_state == state) return;

	_state = state;
	[self.delegate sessionManager:self didChangeState:state];
}