How to temporarily change all default user settings without destroying the original?

Posted by mystify on Stack Overflow See other posts from Stack Overflow or by mystify
Published on 2010-05-25T12:30:08Z Indexed on 2010/05/25 12:31 UTC
Read the original article Hit count: 180

Filed under:

iphone

|

nsuserdefaults

My app is based strongly on a lot of NSUserDefault keys and values.

I want to implement a temporary defaults profile which the user can activate to get a special task done easily. For this, some of the user defaults must be changed temporarily so the app adjusts it's interface appropriately.

I started to just manually change those NSUserDefaults settings, but this also destroys the user's original settings.

Is it possible to keep a backup of the user's NSUserDefault settings and restore them after the user quits the temporary mode or the app?

Like I see it, NSUserDefaults actually is just an NSMutableDictionary which is generated out of a plist file. So I would just make a deep copy of that and later assign that copy somehow back to NSUserDefaults?

© Stack Overflow or respective owner

Related posts about iphone

iphone - direct link to iPhone review form from inside iphone

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to link directly to the review link of one of my Apps. I know that it is possible because Appirater did it in the past, but some change in iTunes turned the API down. Appirater uses this URL NSString *templateReviewURL = @"itms-apps://itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews… >>> More
Buy iPhone 4 Without Contract: $599 (AT&T) and $699 (Verizon)

as seen on Tech Dreams - Search for 'Tech Dreams'
Purchasing iPhone without a contract is a good option when you are planning to gift it to someone or going to use it outside US. Both AT&T and Verizon lets you iPhone 4 without a contract but this information is buried deep under blurred text in FAQs and agreements. Here is the pricing… >>> More
Is it possible to download and run IPhone apps on an IPhone emulator

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am tasked to provide an IPhone client app for our SaaS website. I have never written an IPhone application, nor do I have an IPhone at the moment. Before I can decide whether or not I want to do this myself or outsource this, I'd like to try a few apps myself to get a feeling for the UI. Is… >>> More
iPhone web app from dashcode rss feed template works deployed on simulator but not on iphone

as seen on Stack Overflow - Search for 'Stack Overflow'
iPhone web app from dashcode rss feed template works deployed on simulator but not on iphone. The web app is deployed at; http://www.alila.se/wordpress/index.html If i run the simulator and enter that adress, it fetches the rss feed and displays it. Everything fine. When i enter the adress into… >>> More
Problem running iPhone application on iPhone from Xcode (and in Instruments)

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi I have a problem running one application on the iPhone from Xcode (or Instruments). When I try to run the app I get the error message Failed to upload XXX.app in the bottom left corner of Xcode. The strange thing is it actually uploaded the app to the iPhone but it doesn't start it (after this… >>> More

Related posts about nsuserdefaults

iPhone SDK: NSUserDefaults or NSDictionary?

as seen on Stack Overflow - Search for 'Stack Overflow'
Compare the following: using NSUserDefaults saving it with synchronize using NSDictionary saving it with writeToFile in the app Documents folder What are the differences? Personally, I prefer to mantain different NSDictionary organized by topic rather than use a single NSUserDefaults. Am I thinking… >>> More
NSUserDefaults limit integer?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hey guys, Is it possible to limit an integer in the NSUserDefaults? Off course you can limit it within your app but I am thinking of the TextFields in Settings. Would be great to get some hints. Thanks a lot. >>> More
Trouble with data not saving with bindings and shared NSUserDefaults in IB

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm having a bit of a strange issue that I can't quite figure out. I'm somewhat of a n00b to Interface Builder. What I am trying to do seems like it should be simple, but it's not working for some reason. In interface builder I have a preferences window with a simple NSTextField. I have set the value… >>> More
Problem with NSUserDefaults and deallocated Instance

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I'm having a problem with NSUserDefaults. I've followed the steps in the books as closely as I can for my app, but still get the same problem. I am getting a *** -[NSUserDefaults integerForKey:]: message sent to deallocated instance 0x3b375a0 error when I try and load in the settings. Here… >>> More
Saving Multiple Annotations -NSUserDefaults

as seen on Stack Overflow - Search for 'Stack Overflow'
I came cross this code as shown below.In the following code, I could able to save only one single annotation, however I have an array of annotations, I could not able to save them with single NSUserDefaults To save: NSUserDefaults *ud = [NSUserDefaults standardUserDefaults]; [ud setDouble:location… >>> More