Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>As far as you've asked for some sample code I will simply post here how I dealt with the same task in my app.</p> <p>Quick intro: I was using a NIB file for storing initial <code>UITabBarController</code> state and to differ my tabs one from another I simply defined tag variables for <code>UITabBarItem</code> objects assigned to each <code>UIViewController</code> stuffed in my <code>UITabBarController</code>. To be able to accurately track last selected tab (including the 'More' one) I've implemented following methods for <code>UITabBarControllerDelegate</code> of my <code>UITabBarController</code> and <code>UINavigationControllerDelegate</code> of its moreNavigationController. Here they are:</p> <pre><code>#pragma mark UINavigationControllerDelegate - (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated { [[NSUserDefaults standardUserDefaults] setInteger:mainTabBarController.selectedIndex forKey:@"mainTabBarControllerSelectedIndex"]; } - (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated { [[NSUserDefaults standardUserDefaults] setInteger:mainTabBarController.selectedIndex forKey:@"mainTabBarControllerSelectedIndex"]; } #pragma mark UITabBarControllerDelegate - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { [[NSUserDefaults standardUserDefaults] setInteger:tabBarController.selectedIndex forKey:@"mainTabBarControllerSelectedIndex"]; } </code></pre> <p>And here's the code for saving the tabs order:</p> <pre><code>#pragma mark UITabBarControllerDelegate - (void)tabBarController:(UITabBarController *)tabBarController didEndCustomizingViewControllers:(NSArray *)viewControllers changed:(BOOL)changed { int count = mainTabBarController.viewControllers.count; NSMutableArray *savedTabsOrderArray = [[NSMutableArray alloc] initWithCapacity:count]; for (int i = 0; i &lt; count; i ++) { [savedTabsOrderArray addObject:[NSNumber numberWithInt:[[[mainTabBarController.viewControllers objectAtIndex:i] tabBarItem] tag]]]; } [[NSUserDefaults standardUserDefaults] setObject:[NSArray arrayWithArray:savedTabsOrderArray] forKey:@"tabBarTabsOrder"]; [savedTabsOrderArray release]; } </code></pre> <p>As you can see I've been storing the order of tabs' indexes in an array in <code>NSUserDefaults</code>.</p> <p>On app's launch in <code>applicationDidFinishLaunching:</code> method I reordered the <code>UIViewControllers</code> using following code:</p> <pre><code>- (void)applicationDidFinishLaunching:(UIApplication *)application { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; mainTabBarController.delegate = self; int count = mainTabBarController.viewControllers.count; NSArray *savedTabsOrderArray = [[userDefaults arrayForKey:@"tabBarTabsOrder"] retain]; if (savedTabsOrderArray.count == count) { BOOL needsReordering = NO; NSMutableDictionary *tabsOrderDictionary = [[NSMutableDictionary alloc] initWithCapacity:count]; for (int i = 0; i &lt; count; i ++) { NSNumber *tag = [[NSNumber alloc] initWithInt:[[[mainTabBarController.viewControllers objectAtIndex:i] tabBarItem] tag]]; [tabsOrderDictionary setObject:[NSNumber numberWithInt:i] forKey:[tag stringValue]]; if (!needsReordering &amp;&amp; ![(NSNumber *)[savedTabsOrderArray objectAtIndex:i] isEqualToNumber:tag]) { needsReordering = YES; } } if (needsReordering) { NSMutableArray *tabsViewControllers = [[NSMutableArray alloc] initWithCapacity:count]; for (int i = 0; i &lt; count; i ++) { [tabsViewControllers addObject:[mainTabBarController.viewControllers objectAtIndex: [(NSNumber *)[tabsOrderDictionary objectForKey: [(NSNumber *)[savedTabsOrderArray objectAtIndex:i] stringValue]] intValue]]]; } [tabsOrderDictionary release]; mainTabBarController.viewControllers = [NSArray arrayWithArray:tabsViewControllers]; [tabsViewControllers release]; } } [savedTabsOrderArray release]; if ([userDefaults integerForKey:@"mainTabBarControllerSelectedIndex"]) { if ([userDefaults integerForKey:@"mainTabBarControllerSelectedIndex"] == 2147483647) { mainTabBarController.selectedViewController = mainTabBarController.moreNavigationController; } else { mainTabBarController.selectedIndex = [userDefaults integerForKey:@"mainTabBarControllerSelectedIndex"]; } } mainTabBarController.moreNavigationController.delegate = self; [window addSubview:mainTabBarController.view]; } </code></pre> <p>It's quite tricky and may seem strange, but don't forget that my <code>UITabBarController</code> was fully created in a nib file. If you construct it programmatically you may simply do the same but following the saved order.</p> <p>P.S.: and don't forget to synchronize <code>NSUserDefaults</code> when your app terminates.</p> <pre><code>- (void)applicationWillTerminate:(UIApplication *)application { [[NSUserDefaults standardUserDefaults] synchronize]; } </code></pre> <p>I hope this will help. If something is not clear please do comment and ask.</p>
    singulars
    1. This table or related slice is empty.
    1. POHow to: Save order of tabs when customizing tabs in UITabBarController
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USIvan Karpan
    1. USIvan Karpan
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POHow to: Save order of tabs when customizing tabs in UITabBarController
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COHi Iva, thanks for posting the above. I was just wondering if you could elaborate on the actual loop you run to create the array you save in your NSUSerDefaults for the tab order? Because I realize it's possible to get the view controller's index, but I assume this just gives me the order it's in now, and not how it should be - and how this fits with creating them next time. Do you alloc the view controllers with a tag or how would I know which one is which?
      singulars
      1. PO
      1. USrunmad
    2. COI actually posted all the code from the very beginning, the reason why it wasn't displayed properly is because I've totally missed that '<' character interrupts 'code' and 'pre' tags... Changed them to &lt; and now everything looks OK.
      singulars
      1. PO
      1. USIvan Karpan
    3. COAh, thanks :) But it looks like some of it is still missing from the didEndCustomizingViewControllers: method..
      singulars
      1. PO
      1. USrunmad
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload