#NPReachability

• Originally By Nick Paulson
• KVO support added by Adam Ernst
• ARC support and changes to the interface by Abizer Nasir

NPReachability is an extension of Apple's Reachability class which provides information about the network status.

It is written as a singleton so make sure you reference it as:

NPReachability *reachability = [NPReachability sharedInstance];

This class can take a block handler to process changes in status, but also supports KVO and traditional notifications as well. It is written to support Automatic Reference Counting (ARC)

Block support

Handlers are declared as

typedef void (^ReachabilityHandler)(NPReachability *curReach);

This takes the NPReachability object as a parameter. As originally written this class passed the SCNetworkReachabilityFlags as a parameter, but you can get that and more by messaging the object directly

You add blocks to be executed when the network status changes by using:

- (id)addHandler:(ReachabilityHandler)handler;

This returns an opaque object which you should use to remove the handler at the appropriate time (in a dealloc, say) with:

- (void)removeHandler:(id)opaqueObject;

KVO support

Two properties can observed for changes to the network status:

@property (nonatomic, readonly, getter=isCurrentlyReachable) BOOL currentlyReachable;
@property (nonatomic, readonly) SCNetworkReachabilityFlags currentReachabilityFlags;

NSNotification

When the network status changes a NPReachabilityChangedNotification is sent with the NPReachability instance as the notification object.

Dependencies

• Xcode 4.2+ for ARC support and compatibility libraries
• THe SystemConfiguration Framework should be added to your projects

Please use and improve!

I'd love it if you could send me a note as to which app you're using it with!