Refresh data in UIViewController

[DeeJay_CRO]

Hello!

I have an app with 5 tabs. Four of them holds UIViewController, fifth one is TableViewController.

On fifth tab I have a save function, which changes some data.

However, if I go back on any of these tabs, this data is not refreshed.

I know how to refresh data on tableview, but what would be the best approach with these four UIViewControllers. How to refresh data on them?

Thanks a lot!

Cheers!

[prudhvi]

Hi Deejay,can you send your code..

[DeeJay_CRO]

Originally Posted by prudhvi

Hi Deejay,can you send your code..

During application startup, I'm setting town name as:

MySingleton *sharedInstance = [MySingleton sharedInstance];
sharedInstance.townName = @"New York";

On all tabs, I'm using the same singleton instance to show town name:

[townName setText:sharedInstance.townName];

Singleton is 100% ok, (made "by the book") since I'm using this townName in all 5 tabs and all of them shows the townName set during application startup.



But if I change townName, and save it:

MySingleton *sharedInstance = [MySingleton sharedInstance];
sharedInstance.townName = @"Chicago";

and change a view by selecting any of the tabs, the old value is still shown.

I need to refresh data, to have a new town name on all tabs after save.

[prudhvi]

did u store all the tabs in an array?then create a property for it to access anywhere.then after saving change the text of all tabs by running a loop using that array count.

[DeeJay_CRO]

Originally Posted by prudhvi

did u store all the tabs in an array?then create a property for it to access anywhere.then after saving change the text of all tabs by running a loop using that array count.

No,I didn't. I thought that maybe is existing some "authomatic" mechanism (like invoking re-building a view - or something like that), since I have 30-40 variables to refresh (not only town name).

However, thanks for the answer - I will do it in that way.

Cheers!

[DeeJay_CRO]

Originally Posted by DeeJay_CRO

No,I didn't. I thought that maybe is existing some "authomatic" mechanism (like invoking re-building a view - or something like that), since I have 30-40 variables to refresh (not only town name).

However, thanks for the answer - I will do it in that way.

Cheers!

Or, what do you say for this solution:

1) make a separate method for setting gui labels (for each view - one such method)
2) call it "normally" in viewDidLoad - for each view the same
3) set some flag that data is changed - for each view - separate flag
4) on each view controller, in viewWillAppear, check view's flag
5) if data is changed, load all data for the view (call that separate method) and reset view's flag.

In that way it could be assured that every view refreshed (and only once) for each data saving.