Databases
StackOverflow2013
Postsdbo
POHow to display view on applicationDidBecomeActive with UITabBarController
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to display view on applicationDidBecomeActive with UITabBarController
    primarykey
    data
    text
    <p>There is one issue that I've been struggling with and I can't seem to get enough information about it on the web. It has to do with the Apple multitasking and the Tab bar view. I want to control which tab will be selected when the application is entering foreground or becoming active. At the moment every time I will close the app and re-open it, it will open the last UIView that was displaying on the tab bar. How can I control that? </p> <p>Firstly, I want to be able to display a preview image with the app logo every time the application becomes active. Here is the code I'm using for that but I keep getting EXC_BAD_ACCESS when the app is entering foreground for this line: [window addSubview:self.preMiniView]:</p> <pre><code> - (void)applicationDidBecomeActive:(UIApplication *)application { if (!self.preMiniView) { self.preMiniView = [[UIImageView alloc] initWithFrame:window.frame]; self.preMiniView.frame = CGRectMake(0,0,324,480); window.backgroundColor = [UIColor colorWithRed:21.0/255.0 green:7.0/255.0 blue:2.0/255.0 alpha:1]; } UIImage *img = [UIImage imageNamed:@"preloadSm.jpg"]; self.preMiniView.image = img; [img release]; if (self.preMiniView.alpha == 0.0) { [self.preMiniView setAlpha:1.0]; } [window addSubview:self.preMiniView]; // adding the how to view to the view. [NSTimer scheduledTimerWithTimeInterval:3 target:self selector:@selector(initApp:) userInfo:nil repeats:NO]; } - (void)applicationDidEnterBackground:(UIApplication *)application { [tabBarController.view endEditing:YES]; [tabBarController.view setAlpha:0.0]; [self.preMiniView release]; self.preMiniView = nil; NSLog(@"applicationDidEnterBackground iphone"); } - (void)initApp:(NSTimer *)timer { if (self.preMiniView) { [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(removePrev:) userInfo:nil repeats:NO]; [window insertSubview:tabBarController.view atIndex:0]; [tabBarController.view setAlpha:1.0]; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:.7]; [self.preMiniView setAlpha:0.0]; [UIView commitAnimations]; } } - (void)removePrev:(NSTimer *)timer { [self.preMiniView removeFromSuperview]; } </code></pre> <p>Secondly, I'm trying to present a pdf file with one of my UIViews when my app is hitting the method application:openURL:sourceApplication:annotation (used for opening a file from the email app). I get the correct file url but I'm not sure how to display the actual file in one of my custom UIView called PDFReaderViewController. It seems I can't just use this code on the AppDelegate:</p> <pre><code>pdfController = [[PDFReaderViewController alloc] init]; [pdfController initFromName:fileName]; [[self navigationController] pushViewController:pdfController animated:YES]; [pdfController release]; pdfController = nil; </code></pre> <p>I get a warning: receiver 'PDFReaderViewController' is a forward class and corresponding @interface may not exist</p> <p>Any idea how to display the new file using PDFReaderViewController from the AppDelegate?</p> <p>I must be missing something basic here .... thanks for your help!</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USdynamo42
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

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