Best way to implement RKReachabilityObserver in RestKit - xcode

Question

I have written a tab based application in Xcode/RestKit and am attempting to use the RKReachabilityObserver to determine Internet connectivity on the device.
Ideally I'd like to have a single reachability variable throughout my application (if this is possible) but currently my implementation is as per the code below and does not work very well when replicated over my 4 tabs.
If anybody has any suggestions of a better way to do this, I'd really appreciate your comments.
View.h
#property (nonatomic, retain) RKReachabilityObserver *observer;
View.m
#interface AppViewController()
{
RKReachabilityObserver *_observer;
}
#property (nonatomic) BOOL networkIsAvailable;
#synthesize observer = _observer;
-(id)initWithCoder:(NSCoder *)aDecoder {
if ((self = [super initWithCoder:aDecoder])) {
self.observer = [[RKReachabilityObserver alloc] initWithHost:#"mydomain"];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(reachabilityChanged:)
name:RKReachabilityDidChangeNotification
object:_observer];
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// determine network availability
if (! [_observer isReachabilityDetermined]) {
_networkIsAvailable = YES;
}
else
{
_networkIsAvailable = NO;
}
_text.returnKeyType = UIReturnKeyDone;
_text.delegate = self;
}
- (void)reachabilityChanged:(NSNotification *)notification {
RKReachabilityObserver* observer = (RKReachabilityObserver *) [notification object];
if ([observer isNetworkReachable]) {
if ([observer isConnectionRequired]) {
_networkIsAvailable = YES;
NSLog(#"Reachable");
return;
}
}
else
{
_networkIsAvailable = NO;
NSLog(#"Not reachable");
}
}
then anywhere in my view, I simply do....
if (_networkIsAvailable == YES)
{...
I have implemented this over multiple views (which seems to be causing the problem.
What is the suggested approach for a multiple-view application?

Answer 1

The [RKClient sharedClient] singleton already has a property for that (reachabilityObserver). Feel free to use that one.
if ([[[RKClient sharedClient] reachabilityObserver] isReachabilityDetermined] && [[RKClient sharedClient] isNetworkReachable]) {
....
}
You can also subscribe to RKReachabilityObserver notifications (if you want to take any action when reachability status changes)
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(reachabilityStatusChanged:)
name:RKReachabilityDidChangeNotification object:nil];

Answer 2

Here is some changes in RestKit 0.20 and later.
The code of reachability block should looks like:
RKObjectManager *manager = [RKObjectManager managerWithBaseURL:[RemoteTools serverUrl]];
[manager.HTTPClient setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
if (status == AFNetworkReachabilityStatusNotReachable) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"No network connection"
message:#"You must be connected to the internet to use this app."
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alert show];
}
}];