Question

Currently I’m developing an application which can send multiple files to other device over Wi-Fi using bonjour service same as developer.apple Wi-Tap application did. Only one difference is ,I’m sending files where Wi-Tap sending strings.

Now I would like to handle the Wi-Fi connection issues like connection loss in my application.

I can handle the NSStream Errors through handleEvent delegate for below cases

 NSStreamEventErrorOccurred 
 NSStreamEventEndEncountered

However I’m Unable to find the Wi-Fi connection loss through this delegate. So the possible solutions in my mind is using the Reachability class for checking the wi-fi connection in a background thread. However it’s a bad practice and it consumes more battery power of device.

So is there any other way to track the Wi-Fi connection of the device during the file transfer ?

Answer 1

One way around is to use use NSNetService

As this is just a service publishing tool it won’t interfere in your data transfer so you just have to use

-(void)publishNetwork
{
//---publish the service---
netService = [[NSNetService alloc] 
              initWithDomain:@"" 
              type:BonjourServiceName 
              name:@"" 
              port:portNo];
netService.delegate = self;
[netService publish]; 

}

You have to run this in

[netService scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];

if Wifi is on then this will be fired

- (void)netServiceDidPublish:(NSNetService *)sender
 {
    NSLog(@"Service did publish:%@",sender);

 }

if there is no wifi

-(void)netService:(NSNetService *)aNetService didNotPublish:(NSDictionary *)dict 
 {
   NSLog(@"Service did not publish: %@", dict);
}

These are the delegates of NSNetService you can refer the library .
This is just a way around your problem hope it helps.