网络检测

gistfile1.txt

Reachability *hostReach = [[Reachability reachabilityWithHostName:@"http://www.baidu.com"] retain];
	[hostReach startNotifier];
    
    
    [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(reachabilityChanged:)
												 name: kReachabilityChangedNotification object: nil];


- (void) reachabilityChanged: (NSNotification*)note{

    NSLog(@"changed Net");
}