如何简单地测试到IP的本地Wifi连接，例如192.168.0.100的代码状态？

你知道我是否可以简单地测试是否有WIFI本地连接？ 例如，如果可以访问URL 192.168.0.100。 我尝试了Reachability没有成功。 它告诉我它是连接的，但事实并非如此。

我想首先测试是否存在本地WIFI连接，然后当我确定存在连接时，启动该Web服务：

- (void)callWebService:(NSString *)url withBytes:(NSString *) bytes //GET { NSMutableURLRequest* request = [[NSMutableURLRequest alloc] init]; NSString *url_string = [bytes stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]]; [request setURL:[NSURL URLWithString:[url stringByAppendingString: url_string]]]; [request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData]; [request setTimeoutInterval:timeOut]; NSURLConnection *connection = [NSURLConnection connectionWithRequest:request delegate:self]; //try NSURLSession [connection start]; } 

提前致谢。

Answer 1

NSURLConection有许多委托方法。 尝试以下之一：

 - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { [self.download_connection cancel]; // optional depend on what you want to achieve. self.download_connection = nil; // optional DDLogVerbose(@"Connection Failed with error: %@", [error description]); } - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response; NSInteger state = [httpResponse statusCode]; if (state >= 400 && state < 600) { // something wrong happen. [self.download_connection cancel]; // optional self.download_connection = nil; // optional } } 

Answer 2

要测试互联网连接，您必须使用Apple的可达性 。 使用ReachableViaWiFi枚举检查可达性。

然后你需要ping你的服务器。 在didReceiveResponse方法中，您需要搜索服务器的成功范围。

  - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response; NSInteger status = [httpResponse statusCode]; if (status >= 200 && status <300) { // You are able to reach the server. Do something. } } 

EDITED

“我尝试了Reachability没有成功”

您是否碰巧忘记通知startNotifier可达性？

 Reachability *reachability = [Reachability reachabilityWithHostname:@"www.google.com"]; reachability.reachableBlock = ^(Reachability *reachability) { NSLog(@"Network is reachable."); }; reachability.unreachableBlock = ^(Reachability *reachability) { NSLog(@"Network is unreachable."); }; // Start Monitoring [reachability startNotifier];