I played some games some weeks ago and after some playing I removed them.
But when I reinstall them again I see that they keep my data.
How is it possible?
I think it's related to my iCloud acount and store data there but I don't want to continue that game. I want to start again from zero.
What can I do?
Apps can persist data on iOS across uninstall/reinstall of apps in the keychain, iCloud or third party cloud services (like Dropbox). You have control over iCloud data, however there is no easy way of clearing the keychain entries created by the app.
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I worked on app in which user can add images and make notes about those images, which i stored in sqlite and i store cards in document directory. I have enabled file Sharing option in app so user can keep backup of app's data manually in her PC via iTunes.
Please consider this scenario: the user connects the device from time to time to iTunes, and the synch process takes place. however, she does NOT go into the File Sharing option which is one way to backup manually the data in PC. now, she drops the phone in the bathtub and it does not work or due to some other reason she lost her device.
my question: when she gets a new phone, can she recover her data?
if yes, then how could we do this?
if no, then what is the correct way now to backup the third party app data.
We have finished writing an iPhone App that uses coredata.
In further versions we plan to add an iPad App that is able to display the data collected by the iPhone App (and of corse modify, use it) to give more interaction possibilities to the user.
My question is: Is it possible to move existing coredata (of already installed apps on iphones) to the cloud and read that data out with an iPad application?
If yes: can you point me in the right direction of where to start?
If no: is there another alternative to access coredata created with an iPhone App with an iPad app?
When using Core Data's built in iCloud support it doesn't matter what kind of device you're on, only that the Core Data stack is initialized the same way. Any iOS device or Mac can use the same iCloud store, and data created on one can be read on another.
One crucial detail though: If you already have a data store and you add iCloud support, those pre-existing records do not automatically get migrated to the cloud. iCloud works based on transaction logs, and transaction logs are only created when you save changes. Existing data that doesn't immediately change generates no transactions, and therefore doesn't go to the cloud.
If you have existing data when you add iCloud, you'll need to migrate the data to a new data store to force transactions for those existing records. You can do this fairly easily using NSPersistentStoreCoordinator's migratePersistentStore:toURL:options:withType:error: method. It's not hard, but it's not always obvious that it's necessary.
To get started, I first suggest watching Apple's WWDC videos on iCloud-- especially WWDC 2012's session 227, Using iCloud with Core Data. Next, I suggest extreme caution, because as of today Core Data's iCloud support is still, shall we say, far from being the most reliable of Apple's APIs.
Everytime I get a call my old wallpaper shows even though I have a new one. I'm trying to find it on my iOS but I cannot seem to figure out where. So I'm trying to track down what folders gets backed up when i backup my iPhone since I have restored it and it's still there.
(I'm using a jailbroken device)
I know this isn't the actual folder names and etc but it will give you an idea what it's backing up though. Good Luck.
With iOS 1.1 and later
Safari bookmarks, cookies, history,
and currently open pages
Map bookmarks, recent searches, and
the current location displayed in
Maps
Application settings, preferences,
and data
Address Book and Address Book
favorites
Calendar accounts
Wallpapers
Notes
Call history
Mail accounts
YouTube bookmarks
SMS messages
Saved suggestion corrections (these
are saved automatically as you reject
suggested corrections)
Camera Roll (photos and screenshots
taken by the iPhone)
Voicemail token (This is not the
Voicemail password, but is used for
validation when connecting. This is
only restored to a phone with the
same phone number on the SIM card.)
Web clips
Network settings (saved Wi-Fi
hotspots, VPN settings, network
preferences)
Paired Bluetooth devices (which can
only be used if restored to the same
phone that created the backup)
Keychain (this includes email account
passwords, Wi-Fi passwords, and
passwords you enter into websites and
some other applications. The keychain
can only be restored from backup to
the same iPhone or iPod touch. If you
are restoring to a new device, you
will need to fill in these passwords
again.)
With iOS 2.0 and later (in addition to the above)
Managed Configurations/Profiles
List of External Sync Sources (Mobile Me, Exchange ActiveSync)
Microsoft Exchange account configurations
Nike + iPod saved workouts and settings
App Store application data (except the application itself, its tmp and caches folder).
With iOS 3.0 and later (in addition to the above)
Videos in Camera Roll
Per app preferences allowing use of location services
Offline web application cache/database
Voice Memos
Autofill for webpages
Trusted hosts having certificates that cannot be verified
Websites approved to get the location of the device
In-app purchases
New with iOS 3.1: Videos in the Camera Roll that are 2 GB or larger are not backed up (iOS 4 and later will back up videos 2 GB and larger)
All user documents and settings get backed up, Application settings as well as system settings.
Applications each have a Documents folder that user data can be saved to, so thats pretty much what gets backed up for applications, including app preferences.
These are the Wallpaper locations:
/private/var/mobile/Library/SpringBoard/HomeBackground.jpg
/private/var/mobile/Library/SpringBoard/HomeBackgroundPortrait.jpg
/private/var/mobile/Library/SpringBoard/LockBackground.jpg
/private/var/mobile/Library/SpringBoard/LockBackgroundPortrait.jpg
I have manually managed to find out what gets backed up and managed to solve the problem :)
I downloaded the trial of iphone packup extractor http://www.iphonebackupextractor.com/ and found what I was looking for.
Also it seems like I just had to change the lockscreen in the iPhone since the file called LockScreen.jpg was the picture I was looking for but since I had another lockscreen using winterboard I didnt think of this.
Good luck to anyone else who has problems similar to this.
When does data get restored for an app? What if I save data in the app's document directory. Then they sync with iTunes. Now iTunes has a backup. Will that data be populated to another device when they sync that new device to their iTunes or will they just get a clean install of my app? I'm trying to figure out how to keep track of a subscription in app purchase and was wondering if I could keep record in NSUserDefaults or some other local store.
Backups are per-device. So a backup of your iPod will not be restored to your iPhone. In other words, there is no sync.
Many times iTunes fails to create complete backup of all the iPhone data say it be contacts, message, mails etc. This type of problem may occur due to not installing iTunes properly. So, you should check whether iTunes have been installed correctly or not. In case there is no problem with iTunes then it is possible that you are trying to create backup of the files which can not be backed with the help of iTunes. To overcome with this issue you need to make use of iPhone backup application. By using this tool you will be able to prepare backup of all the files within minutes safely.
If the user backs up to iTunes, and then restores their backup to another device (maybe they lost their original iPhone), the contents of the app Documents directory will be put on the new device. Anything in the tmp folder won't be backed up or restored like this, but the Documents folder will.
However, that's not the best way to store the in-app purchase information. You should be storing that on your own server and keeping a count of the number of times the purchased content has been used. Inform the user that they can use it a certain number of times (say three) and after that they will have to buy it again. I'm not exactly sure of any details beyond that (like how to verify their identity) but it should get you started.
In my Iphone application , i am able to get the UDID of the device and have display it on alertview.
my query is that while any user go to the apple appstore and try to istall the application, at that same time how to get the UDID of the device and store it to the Database and also want the UDID of application at the time of uninstallation.
Whether is it possible or not?
If possible please provide any code or any useful link or any other info,which would be appreciated.
Thanks,
Mishal Shah
You can't run any process when your application is not actually running - this includes at download time and at uninstallation.
Instead, you should try to find other ways to measure what you want. You can, for example, have your application keep track (in NSUserDefaults or similar) of whether or not this is the first time the user has launched your app, and if it is submit the UDID to your server.
Tracking uninstallation is a lot harder - the best you may be able to do is to keep track of how long it's been since the user last launched your app (if you have the app submit a launch time every time the user opens it).
Keep in mind that a lot of tech-savvy users will object to your gathering the UDID or usage patterns within your app without their express permission (or at all).