Where do you put global application data in an iPhone app?
<p>I have an app that allows the user to view, manipulate and manage a collection of Schedule objects. Different parts of the app need access to this data. I've experimented with making the collection a singleton, but I didn't find that very clean.</p>

<p>I recently changed to storing the global data in the AppDelegate class and using:</p>

<pre><code>MyAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
[delegate.myGlobalData doSomething];
</code></pre>

<p>Which eliminates the need for my global data to be a singleton, but is really just taking advantage of the UIApplication singleton.</p>

<p>There really isn't just one primary view controller where it makes sense to store it in my case. So I was wondering what different strategies people use to address this.</p>
