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POiCloud: can I ignore those who disable iCloud?
 

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    <p>I'm struggling a bit with the idea of iCloud and posted a more general question <a href="https://stackoverflow.com/questions/7795629/icloud-basics-local-app-sandbox-vs-cloud-sandbox-on-device">here</a>. My biggest problem is to decide whether I should stop putting the user's data in the good old documents folder which is found in the app's sandbox. To illustrate my problem:</p> <p><img src="https://i.stack.imgur.com/8mmHl.png" alt="enter image description here"></p> <p>The <a href="http://developer.apple.com/library/ios/#documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/iCloud/iCloud.html#//apple_ref/doc/uid/TP40007072-CH5-SW10" rel="nofollow noreferrer">docs</a> don't give an answer as far as I can see. Let's suppose I have an App which handles different txt files. Once I start my app, I simply check if any txt files are in the cloud like so:</p> <pre><code>- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { NSLog(@"AppDelegate: app did finish launching"); self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease]; self.window.rootViewController = self.viewController; [self.window makeKeyAndVisible]; // (1) iCloud: init NSURL *ubiq = [[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:nil]; if (ubiq) { NSLog(@"User has iCloud enabled! Let's get the txt files from the cloud."); [self loadDocument]; } else { NSLog(@"User doesn't have iCloud enabled. App is thus worthless."); } return YES; } </code></pre> <p>I then have a method to check if there are any txt files in the cloud and if so, load them. If not, I simply create new txt files in the cloud.</p> <p>This means that the app does not store any data in the documents folder. As far as I understand it, everything is either in the local iCloud storage of my device (which is also accessible if the user is OFFLINE) or in the cloud. So the text file exists in two places: on my device and the cloud.</p> <p><strong>So there is simply no need to store a third copy in my local documents folder, right? Or is this essential for some reason I have overlooked? In other words, for what should I use the local documents folder if I offer iCloud to my users? (And can I simply ignore those who won't sign up for iCloud?)</strong></p> <hr> <p>EDIT: Just to clarify, when I'm talking about the standard documents folder in the app's sandbox, I mean this one:</p> <pre><code>NSArray *paths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; </code></pre>
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    1. COFor what it's worth; iCloud will [backup](http://www.marco.org/2011/10/13/ios5-caches-cleaning) the Document directory if the user has backup enabled.
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    2. COAnother FWIW: I wouldn't ignore users who don't have iCloud enabled. Most of the Apple dev docs talk about being able to migrate data into iCloud and out when the user enables/disables for your app.
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    3. CO@quixoto: I see what you mean, but doesn't it feel convoluted to you to have three copies of the same thing floating about? Also, what would be the best way to migrate data? It appears that I would need to do two things at the same time: care about iCloud AND save to my directory. When will I do this? Do I implement this in the UIDocument while data is pushed to the cloud? All of this feels so convoluted as I need to worry about two sets of data which I need to keep in sync all the time. Why would a user not enable iCloud?
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