AFNetworking checking Availability

Question

I've implemented `AFNetworking` without subclassing `AFHTTPClient`, in part using the following code in my `DownloadQueueManager`: ``` -(void)downloadPodcastAt:(NSString *)url toPath:(NSString *)path { NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url] cachePolicy:NSURLRequestReturnCacheDataElseLoad timeoutInterval:60.0]; AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request]; operation.outputStream = [NSOutputStream outputStreamToFileAtPath:path append:NO]; [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { [self saveQueuedItemInformation]; } failure:^(AFHTTPRequestOperation *operation, NSError *error) { // Other stuff }]; [operation start]; } ``` My question is manifold. I've googled til' my fingers went numb, and have yet to find a decent code sample that simply and easily checks for Reachability status using `AFNetworking`. (Oddly, there is plenty of discussion about i…

Accepted Answer

Actually contrary to what A-Live said Reachability IS a part of AFNetworking. It's implemented in `AFHTTPClient.h` here. You need the correct imports in your `.pch` file as discussed here in order to use it.

To use it you'll probably want to have a subclass of `AFHTTPClient` so you can use `setReachabilityStatusChangeBlock` defined here. Here's a simple example without using a subclass.

```
AFHTTPClient *client = [AFHTTPClient clientWithBaseURL:[NSURL URLWithString:@"http://google.com"]];
[client setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
    if (status == AFNetworkReachabilityStatusNotReachable) {
        // Not reachable
    } else {
        // Reachable
    }

if (status == AFNetworkReachabilityStatusReachableViaWiFi) {
        // On wifi
    }
}];
```

If you don't like how this reachability setup works then I would recommend Tony Million's fork of Apple's Reachability. Simple example:

```
Reachability *reach = [Reachability reachabilityWithHostname:@"google.com"];
if ([reach isReachable]) {
    // Reachable
    if ([reach isReachableViaWiFi]) {
        // On WiFi
    }
} else {
    // Isn't reachable

[reach setReachableBlock:^(Reachability *reachblock)
    {
        // Now reachable
    }];

[reach setUnreachableBlock:^(Reachability*reach)
    {
        // Now unreachable
    }];
}
```

AFNetworking checking Availability

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