IOS determines current network status

1. If you only want to determine whether the current is a no-net state:

if ([reachability reachabilityforlocalwifi].currentreachabilitystatus==notreachable&&[[reachability Reachabilityforinternetconnection] currentreachabilitystatus]==notreachable)

{

The operation without net

}else

{

Network-aware operation

}

2. Monitor network status changes

Import Header File

#import "Reachability.h"

Registration Notice

[[Nsnotificationcenter Defaultcenter] addobserver:self selector: @selector (networkstatechange:) Name: Kreachabilitychangednotification Object:nil];

Self.conn = [reachability reachabilityforinternetconnection];

[Self.conn Startnotifier];

(The conn of the above code is the Reachability object)

-(void) Networkstatechange: (nsnotification *) Note

{

Gets the reachability object being monitored by a notification object

reachability *curreach = [Note Object];

Gets the network state of the Reachability object

NetworkStatus status = [Curreach currentreachabilitystatus];

if (status = = Reachableviawwan)

{

NSLog (@ "3G online");

}else if (status = = Reachableviawifi)

{

NSLog (@ "WiFi online");

}else if (status = = Notreachable)

{

NSLog (@ "no net");

}

}

IOS determines current network status