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  • Why does my UIActivityIndicatorView only display once?

    - by Schwigg
    I'm developing an iPhone app that features a tab-bar based navigation with five tabs. Each tab contains a UITableView whose data is retrieved remotely. Ideally, I would like to use a single UIActivityIndicatorView (a subview of the window) that is started/stopped during this remote retrieval - once per tab. Here's how I set up the spinner in the AppDelegate: - (void)applicationDidFinishLaunching:(UIApplication *)application { [window addSubview:rootController.view]; activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; [activityIndicator setCenter:CGPointMake(160, 200)]; [window addSubview:activityIndicator]; [window makeKeyAndVisible]; } Since my tabs were all performing a similiar function, I created a base class that all of my tabs' ViewControllers inherit from. Here is the method I'm using to do the remote retrieval: - (void)parseXMLFileAtURL:(NSString *)URL { NSAutoreleasePool *apool = [[NSAutoreleasePool alloc] init]; AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate]; NSLog(@"parseXMLFileAtURL started."); [appDelegate.activityIndicator startAnimating]; NSLog(@"appDelegate.activityIndicator: %@", appDelegate.activityIndicator); articles = [[NSMutableArray alloc] init]; NSURL *xmlURL = [NSURL URLWithString:URL]; rssParser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL]; [rssParser setDelegate:self]; [rssParser setShouldProcessNamespaces:NO]; [rssParser setShouldReportNamespacePrefixes:NO]; [rssParser setShouldResolveExternalEntities:NO]; [rssParser parse]; NSLog(@"parseXMLFileAtURL finished."); [appDelegate.activityIndicator stopAnimating]; [apool release]; } This method is being called by each view controller as follows: - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; if ([articles count] == 0) { NSString *path = @"http://www.myproject.com/rss1.xml"; [self performSelectorInBackground:@selector(parseXMLFileAtURL:) withObject:path]; } } This works great while the application loads the first tab's content. I'm presented with the empty table and the spinner. As soon as the content loads, the spinner goes away. Strangely, when I click the second tab, the NSLog messages from the -parseXMLFileAtURL: method show up in the log, but the screen hangs on the first tab's view and I do not see the spinner. As soon as the content is done downloading, the second tab's view appears. I suspect this has something to do with threading, with which I'm still becoming acquainted. Am I doing something obviously wrong here?

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  • iPhone Developer Portal won't accept my CSR

    - by Eamon Ford
    I am using the Development Provisioning Assistant in the iPhone Developer Portal, but when I get to the part where it asks me to generate and upload my CSR, I try to upload it and it just gives me this error: The CSR selected is invalid. Please check the file and try again. Does anyone know what this means or what I can do about it?? Thanks!

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  • Enable iPhone accelerometer while screen is locked..

    - by kamziro
    So apparently it is possible to keep the processor going processing stuff while the screen is locked, as indicated here: http://stackoverflow.com/questions/1551712/running-iphone-apps-while-in-sleep-mode However, after testing with the example code, UIAccelerometer will just stop giving value as soon as the device is locked pronto. Is there a way to force otherwise?

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  • iPhone UIViewController goes under status bar

    - by Mantas
    I have UIView and UIController view. My is standard 320x460 view. In applicationDidFinishLaunching I do [window addSubview:[controller view]]; What is weird, UIView goes under the status bar (like there's missing outlet). However, if I rotate iPhone to the side and then back, it shows up ok. Is this an expected behavior (I bet I can ix it by setting offset) or am I doing smth wrong?

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  • iPhone SDK: path and Inner Shadow

    - by JustMe
    Take a look of this image: http://imagebin.ca/img/b-W91wDU.png I have some CGPath like the image 1 and I would like to know how I can create an inner shadow effect like the image 2 I'm working with objective-c and Core Graphics iPhone SDK: 3.2

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  • Detect file creation date on iPhone OS?

    - by Greg Maletic
    I was planning on writing some code whose logic was based upon testing the creation date of a particular file in my app's Documents folder. Turns out, when I call -[NSFileManager attributesOfItemAtPath:error:], NSFileCreationDate isn't one of the provided attributes. Is there no way to discover a file's creation date? Thanks.

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  • advanced opensource iphone applications for developers

    - by Naveen
    The appstore does not allow your app out of a sandbox or allow it an interpreter. But is there any issue with distributing open source apps that run arbitrary code, and let iphone developers install them on their own development devices using xcode itself ? Also, is there anything you can not do with xcode that you may be able to do with ssh after jailbreaking ?

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  • Retrieve Bluetooth adress on the iPhone

    - by Lars
    Hi, I try to retrieve the Bluetooth (Network) adress on the iPhone within an App but i couldn't find a way how to do that :( Does someone has an idea or hint? That would be great because i stuck for a long time... Cheers, Lars

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  • Unable to open database SQLITE iPhone

    - by sandy
    Hi there, I am using SQLITE database in my iPhone app. I have a refresh button on my home screen and on click of that refresh button I usually fetch the data from my web service and store it into my database. In normal scenario it works fine but when I click my refresh button 4-5 times frequently my app crashes and My app log Shows "Unable to open the database" I am not sure why I am getting this SQLLITE error. Is there any restriction on inserting number of rows in SQLITE database?

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  • How to create piano UI in Iphone?

    - by Niraj
    Hi, I am newbei in creating such piano based UI application. I am developing an application in which i have to use Piano. How to create piano UI in Iphone? How to create it using Interface builder ? or is there any other way to create the piano? I am in urgent need to create such UI,If any body has any solution or any useful code or any Link,which would be appreciated. Thanks, Niraj

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  • iPhone Apache server and PHP

    - by kmunky
    hi, i tried to install apache and php on my iphone(i actually did it), i've installed apr,apr-util and Apache BossPrefs Switch from Rock than i tried to acces the server(127.0.0.1 from safari) but i get en error(server couldn't be found). When i'm trying to switch on Apache in BossPrefs it looks like is on but still doesn't work and when i come back to BossPrefs Apache looks like is turned off. What am i doing wrong? is there another thing that i should install? thanks

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  • IPhone Accelerometer Determine Motion

    - by Kelly
    Using the accelerometer output, how do I determine if the user (iphone mounted on waist) is walking? Looking for a good algorithm to determine if the user is walking to determine activity transitions- standing-to-walking or walking-to-standing. please help. Thank you for your time.

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