Until this point implementing the search bar seemed easy:

• adopt a couple of protocols: UISearchDisplayDelegate and UISearchBarDelegate
• implement a few callback methods (from the delegates listed above)

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString;
- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption;
- (void)searchDisplayControllerDidBeginSearch:(UISearchDisplayController *)controller;
- (void)searchDisplayControllerDidEndSearch:(UISearchDisplayController *)controller;

• and implement my own filtering function

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope;

The problem I had on my hands was how to programmatically update the text in the UISearchBar and force the UISearchDisplayDelegate to call the appropriate callback methods.

Turns out it was simpler than expected (despite not being able to find a solution by googling). All that was needed was:

[self.searchDisplayController.searchBar becomeFirstResponder];
self.searchDisplayController.searchBar.text = returnString;

Cheers…

I decided not to waste time and I went for Urban Airship. I registered, uploaded my push certificate, downloaded the sample and integrated the two systems.

Not everything went smoothly though because when I first ran the application I got a

Failed to register with error: Error Domain=NSCocoaErrorDomain Code=3000 UserInfo=0×120610 “no valid ‘aps-environment’ entitlement string found for application”

I thought my provisioning profile did not include the right entitlement… so I re-downloaded it and tried again. Turns out I was using the wrong provisioning profile.

So if you want to avoid my mistake just make sure that after you’ve configured push services in the iPhone Dev Center you download the updated provisioning profile and then you install it via XCode.

Other things worth checking include: the product name in your build configuration matches the app id and of course, the ultimate solution, clean all targets before building!

Cheers…

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theTextField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
theTextField.textAlignment = UITextAlignmentCenter;

Basically this will ensure that no matter how tall your text field is the actual text will be centered both vertically and horizontally.

Cheers…