How to use NSURLCache to return cached API responses when offline (iOS App)

Question

I\'m hoping someone can shed some light on a few things I\'ve been researching but not making much progress on.

I\'d like to take advantage of NSURLCache to return cache

Answer 1

Did you see this post?

AFNetworking (AFHttpClient) offline mode not working with NSURLRequestReturnCacheDataDontLoad policy

Looks like it might be a bug with iOS 6. Here is what Robert Mao had to say in the post:

A summarized work around is read the response from cache, instead of use NSURLRequestReturnCacheDataDontLoad policy:

NSCachedURLResponse *cachedResponse = [[NSURLCache sharedURLCache]     cachedResponseForRequest:request];
if (cachedResponse != nil &&
    [[cachedResponse data] length] > 0)
{
    // Get cached data
    ....
}

Answer 2

Unless all of your calls are 100% GET and free of side effects or time dependency then this is dangerous.