Presenting a UIViewController when application occurs crash in IOS

Question

In my application i have a login view controller where a popover is shown with textfields for username and password. I am trying to switch between two apps and pass data.

• Say this two apps are APP1 and APP2 and then there are these two other viewcontrollers A1 and B1 in APP1 . He switching from both apps are working fine and the data is also getting passed.
• I am trying to switch from A1 and B1 to APP2 and when we switch back from APP2 to APP1 it comes at ViewController A1 or B1 depending on which viewcontroller it was invoked from.
• The problem is APP2 is a heavy application and consumes alot of memory for which ios sometimes kills APP1 and when i switch back it takes me to login screen. APP2 is completely optimized with regards to memory management (it includes mostly images).
• What i want to achieve is, even if APP1 crashes, i want to bypass the login screen and take the user to A1 or B1 when switched back from APP2 .

Any ideas on how to achieve this? It is an iOS 7 application.

Thank you.

Answer 1

Implement application:shouldSaveApplicationState: and application:shouldRestoreApplicationState: in the delegate.

This will save UICollectionView , UIImageView , UIScrollView , UITableView , UITextField , UITextView , UIWebView .

For everything else, use applicationWillResignActive to write code for saving state and application:didFinishLaunchingWithOptions for retrieving the state.

Check the documentation here .