title: Change system property in com.apple.wifi.plist
body: <p>I have been developing an app to programmatically enable/disable Wi-Fi interface of my iphone. I have tried to use the Apple 80211( apple's private service) on my jail broken Iphone 4s (iOS 5.1.1) to make it work. However, thing does not work out as I expected.
    I can successfully scan and get the status of Wi-Fi connection however, the method <code>Apple80211SetPower</code> to enable/disable WiFi seems does not work on iOS 5. </p>
  
  <p>As I found out from SBsetting's WiFi toggle, It might also require to change the system property of WiFi at <code>"/var/preferences/systemconfiguration/com.apple.wifi.plist"</code>. However, my app is failed to change system property in that file, I suspected the problem resulted from file property and ownership. Therefore, I imitated the file property of SBsetting's WiFi toggle, Still, it did not change a thing.
  does anyone know how I could change the system property of this file? this is the code that I used. thanks and regards</p>
  
  <pre><code>NSMutableDictionary *plistDict = 
     [NSMutableDictionary dictionaryWithContentsOfFile:@"/var/preferences/SystemConfiguration/com.apple.wifi.plist"];
  
  BOOL wifiState = [[plistDict objectForKey:@"AllowEnable"] boolValue];
  NSLog(wifiState ? @"Yes" : @"No");
  if (value == YES) 
  {
      [plistDict setValue:[NSNumber numberWithBool:YES] forKey:@"AllowEnable"];
      [plistDict writeToFile:@"/var/preferences/SystemConfiguration/com.apple.wifi.plist" 
                  atomically: YES];
  } 
  else if (value== NO) 
  {
      [plistDict setValue:[NSNumber numberWithBool:NO] forKey:@"AllowEnable"];
      [plistDict writeToFile:@"/var/preferences/SystemConfiguration/com.apple.wifi.plist" 
                  atomically: YES];
  }
  </code></pre>