Question

Sorry, my question is not clean. i want to do the Iphone application A view go to B view, but when i click the button go B View the A View data will remove.
So i would like to know if i want to B View go back A View , the A View can keep the data?

for example : A View doing some job, but i click the button go B View. this time i go back A
View, the A View can still doing. This task is possible? not use navigation bar and tar bar only use button to transfer.

Thank you some one help.

i mean view controller thank you very much

Answer 1

for example : A View doing some job, but i click the button go B View. this time i go back A View, the A View can still doing. This task is possible? not use navigation bar and tar bar only use button to transfer.

As I understand you need launch some background task in view controller A and go to view controller B?
If I right you can do it with these steps:

1. Launch task that you need to do in background. You can do it by performSelectorInBackground:@sel or another way. Also you need somehow indicate when background task is done.
2. Show view controller B by presentModalViewController:(UIViewController *)viewController animated:(BOOL)animated. Your background task in view controller A continue executing.
3. In view controller B make button which will work as “back” button. Add action to button and in this action do [self dismissModalViewControllerAnimated:YES]
4. When you return to view controller A, you can see your background task still executing (or already done)