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  • How do I create rows with alternating colors for a UITableView on iPhone?

    - by Mat
    Hi all, i would to have alternate 2 colors of rows, like the first black, the second white, the third black, etc, etc... my approach is like a basic exercise of programming to calculate if a number is odd number or not: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; cell = ((MainCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier]); if (cell==nil) { NSArray *topLevelObjects=[[NSBundle mainBundle] loadNibNamed:@"MainCell" owner:self options:nil]; for (id currentObject in topLevelObjects){ if ([currentObject isKindOfClass:[UITableViewCell class]]){ if ((indexPath.row % 2)==0) { [cell.contentView setBackgroundColor:[UIColor purpleColor]]; }else{ [cell.contentView setBackgroundColor:[UIColor whiteColor]]; } cell = (MainCell *) currentObject; break; } } }else { AsyncImageView* oldImage = (AsyncImageView*) [cell.contentView viewWithTag:999]; [oldImage removeFromSuperview]; }return cell; The problem is that when i do a rapid scroll, the background of cells become like the last 2 cell black, the first 2 cell white or something like this, but if i scroll slow works fine. I think the problem is the cache of reusableCell. Any ideas? TIA

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  • Core Text CTFrameSetter error with size suggestion

    - by JK
    I am trying to use the CTFramesetterSuggestFrameSizeWithConstraints method of CTFrameSetter to calculate the rect for a given attributed string. However, both the width and height are slightly less than needed. I would appreciate any suggestions on what may be causing this or how to correct it please.

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  • What's the proper way to use sqlite on the iPhone?

    - by Elliot Chen
    Hi, Experts: Can you please give some suggestions on sqlite using on the iPhone? Within my application, I use a sqlite DB to store all local data. Two methods can be used to retrieve those data during running time. 1, Load all the data into memory at initialization stage. (More memory used, less DB open/close operation needed) 2, Read corresponding records when necessary, free the occupied memory after using. (Good habit for memory using, but much DB open/close operations needs). I prefer to use method 2, but not sure whether too many DB opening/closing operations could affect app's efficiency. Or do you think I can 'upgrade' method 2 by opening DB when app launches and closing DB when app quits? Thanks for your suggestions very much!

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  • Can I stop UIImageView Animation at last frame?

    - by Ivan
    Hello, I have an animation using a UIImageView myAnimatedView.animationImages = myImages; myAnimatedView.animationDuration = 1; myAnimatedView.animationRepeatCount = 1; [myAnimatedView startAnimating]; How can I tell to animation to stop at the last frame or to be visible last frame of the series of images? Thank you in advance

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  • Issue scrolling table view with content inset

    - by Rog
    Hi all, I am experiencing a weird scrolling issue and I was hoping someone could give me a hand in trying to identify why this is happening. I have included the part of my code that I think is relevant to the question but am happy to update this post with whatever else is needed. I have implemented a pull to refresh view in the tableview's content inset area. The refresh fires an Async NSURLConnection that pulls data from a webserver, parses the relevant information and refreshes the table as required. This is where the refresh process kicks off: - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{ if (scrollView.contentOffset.y <= - 65.0f && !self.reloading) { self.reloading = YES; [self reloadTableViewDataSource]; [refreshHeaderView setState:EGOOPullRefreshLoading]; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.2]; self.tableView.contentInset = UIEdgeInsetsMake(60.0f, 0.0f, 0.0f, 0.0f); [UIView commitAnimations]; } } Problem is if I start to scroll whilst the content inset is "visible" (i.e. during reload) I get this weird behaviour where my table sections do not scroll all the way to the top - see screenshot for a clear visual of what I am trying to describe here. I have included a couple of screenshots below that clearly identify what is happening at the moment. Has anyone experienced this before? Any ideas on what I should be looking at to try and fix it? Many thanks in advance, Rog And this is the result if I start scrolling the table. The orange bit at the top of the image is the actual navigation bar, where I would expect the table section (date 1 December 2010) to be.

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  • iPhone Using a Modal View from a TabBar View

    - by mbarron
    Using a Modal View from a TabBar View I always get the following error: Error from Debugger: Previous Frame identical to this frame (gdb could not unwind past this frame) I have an App using a TabBar. From one of the TabViews I need to display a View modally. I try: if(self.gmailController == nil) { self.gmailController = [[GMailViewController alloc] initWithNibName:@"GMailView" bundle:nil]; } [[self.navigationController] presentModalViewController:gmailController animated:YES]; //////// And I have tried: [self.parentViewController presentModalViewController:gmailController animated:YES]; and [self.tabBarController presentModalViewController:gmailController animated:YES]; and [self presentModalViewController:gmailController animated:YES]; Thanks for reading! Any comments welcome. Mark

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  • Where should I put some code for loading application data?

    - by cgp
    I have a tab-bar and navigation controller application (like Youtube app or Contacts app). Where is the correct place to have the code for loading some data from the web? These data are necessary for all the tabs of the Tab Controller and the app can't display anything before all data are downloaded and parsed from the app (except a loading indicator view of course). Up to now I put it in the AppDelegate but it somehow doesn't feel right.. What's the correct way to do it? Thanks!

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  • Get content length from UIWebView

    - by g0ld2k
    I am looking to find out if a web page has changed, I was going to use the content length of the web page but have not seen a way to do so. Any ideas? Or can anyone think of another way to check periodically if a web page has changed? Any ideas are appreciated. Thanks, Chris

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  • Integer Extensions - 1st, 2nd, 3rd etc [closed]

    - by David Schiefer
    Possible Duplicate: NSNumberFormatter and ‘th’ ‘st’ ‘nd’ ‘rd’ (ordinal) number endings Hello, I'm building an application that downloads player ranks and displays them. So say for example, you're 3rd out of all the players, I inserted a condition that will display it as 3rd, not 3th and i did the same for 2nd and 1st. When getting to higher ranks though, such as 2883rd, it'll display 2883th (for obvious reasons) My question is, how can I get it to reformat the number to XXX1st, XXX2nd, XXX3rd etc? To show what I mean, here's how I format my number to add a "rd" if it's 3 if ([[container stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] isEqualToString:@"3"]) { NSString*badge = [NSString stringWithFormat:@"%@rd",[container stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]]; NSString*scoreText = [NSString stringWithFormat:@"ROC Server Rank: %@rd",[container stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]]; profile.badgeValue = badge; rank.text = scoreText; } I can't do this for every number up to 2000 (there are 2000 ranks in total) - what can I do to solve this problem?

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  • How do you populate a NSArrayController with CoreData rows programmatically?

    - by Andrew McCloud
    After several hours/days of searching and diving into example projects i've concluded that I need to just ask. If I bind the assetsView (IKImageBrowserView) directly to an IB instance of NSArrayController everything works just fine. - (void) awakeFromNib { library = [[NSArrayController alloc] init]; [library setManagedObjectContext:[[NSApp delegate] managedObjectContext]]; [library setEntityName:@"Asset"]; NSLog(@"%@", [library arrangedObjects]); NSLog(@"%@", [library content]); [assetsView setDataSource:library]; [assetsView reloadData]; } Both NSLogs are empty. I know i'm missing something... I just don't know what. The goal is to eventually allow multiple instances of this view's "library" filtered programmatically with a predicate. For now i'm just trying to have it display all of the rows for the "Asset" entity. Addition: If I create the NSArrayController in IB and then try to log [library arrangedObjects] or manually set the data source for assetsView I get the same empty results. Like I said earlier, if I bind library.arrangedObjects to assetsView.content (IKImageBrowserView) in IB - with same managed object context and same entity name set by IB - everything works as expected. - (void) awakeFromNib { // library = [[NSArrayController alloc] init]; // [library setManagedObjectContext:[[NSApp delegate] managedObjectContext]]; // [library setEntityName:@"Asset"]; NSLog(@"%@", [library arrangedObjects]); NSLog(@"%@", [library content]); [assetsView setDataSource:library]; [assetsView reloadData]; }

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  • Capture one view and output to an other view

    - by killerapfel
    Hi, looking for an impulse, how to get that done. I know that it is possible to capture the iSight but I have no Idea how to capture the screen and output it in realtime to an other... there will be no recording, just output... would be nice if someone could give me an hint. thx in advance

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  • uitextfield delegate must be file's owner?

    - by deafgreatdane
    I've seen a few references (eg here) in response to folks having trouble getting the keyboard to dismiss in iPhone that say "double check that the delegate is attached to file's owner. Is this necessarily true? Or just standard practice? Can't I have other objects in my nib, such as a subclass of UIViewController, and make connections to those as I like? I'd hate to have to route everything into the object that happens to be file owner. That said, I'm having a difficult time getting the keyboard to disappear. I know it's connected to the delegate, because I can set break points and step through the code. I can see the [theTextField resignFirstResponder] get called (and return true), but the keyboard still won't go away. Any other suggestions?

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  • Problem to get a Substring from a String?

    - by raaz
    Hi all, i have a little question ,i have a NSString object (\n "1 Infinite Loop",\n "Cupertino, CA 95014",\n USA\n) and i want the Cupertino from this string Till now i have used stringByReplacingOccurrencesOfString: and able to get "1InfiniteLoop""CupertinoCA95014"USA But still not able get Cupertino. Do any other method able to solve this problem?

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  • NSTableView don't display data

    - by Tomas Svoboda
    HI, I have data in NSMutableArray and I want to display it in NSTableView, but only the number of cols has changed. This use of NSTableView is based on tutorial: http://www.youtube.com/watch?v=5teN5pMf-rs FinalImageBrowser is IBOutlet to NSTableView @implementation AppController NSMutableArray *listData; - (void)awakeFromNib { [FinalImageBrowser setDataSource:self]; } - (IBAction)StartReconstruction:(id)sender { NSMutableArray *ArrayOfFinals = [[NSMutableArray alloc] init]; //Array of list with final images NSString *FinalPicture; NSString *PicNum; int FromLine = [TextFieldFrom intValue]; //read number of start line int ToLine = [TextFieldTo intValue]; //read number of finish line int RecLine; for (RecLine = FromLine; RecLine < ToLine; RecLine++) //reconstruct from line to line { Start(RecLine); //start reconstruction //Create path of final image FinalPicture = @"FIN/final"; PicNum = [NSString stringWithFormat: @"%d", RecLine]; FinalPicture = [FinalPicture stringByAppendingString:PicNum]; FinalPicture = [FinalPicture stringByAppendingString:@".bmp"]; [ArrayOfFinals addObject:FinalPicture]; // add path to array } listData = [[NSMutableArray alloc] init]; [listData autorelease]; [listData addObjectsFromArray:ArrayOfFinals]; [FinalImageBrowser reloadData]; NSBeep(); //make some noise NSImage *fin = [[NSImage alloc] initWithContentsOfFile:FinalPicture]; [FinalImage setImage:fin]; } - (int)numberOfRowsInTableView:(NSTableView *)tv { return [listData count]; } - (id)tableView:(NSTableView *)tv objectValueFromTableColumn:(NSTableColumn *)tableColumn row:(int)row { return (NSString *)[listData objectAtIndex:row]; } @end when the StartReconstruction end the number of cols have changed right, but they're empty. When I debug app, items in listData is rigth. Thanks

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  • NSXMLParser with multiple attributes

    - by mitb67
    Hi. I have the following XML (doing an app for iPhone): <Row> <Field name="employee_id_disp">00070431</Field> <Field name="given_name">John</Field> <Field name="family_name">Doe</Field> </Row> ... How can I retrieve values only for one of the attributes, for example value "John" for attribute name="given_name" ? Thanks for answers.

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  • How can I remove the present view when I have added more than one subView ?

    - by srikanth rongali
    How can I remove the present view when I touched the close button. I did [self.view removeFromSuperView] when I added only one subView. It worked. But, I have now added another subView to the previous subView. I need to to get the parent view . How can I do it. My code of adding the subView is here. When I did the following only one view is removed. //FirstViewController: UIViewController -(void)libraryFunction:(id)sender { LibraryController *libraryController = [[LibraryController alloc]init]; [self.view addSubview:libraryController.view]; } //LibraryController: UIViewController -(void)viewDidLoad{ RootViewController *rootViewController = [[RootViewController alloc] initWithStyle:UITableViewStylePlain]; UINavigationController *aNavigationController = [[UINavigationController alloc] initWithRootViewController:rootViewController]; self.navController = aNavigationController; [aNavigationController release]; [rootViewController release]; [self.view addSubview:navController.view]; } //RootViewController: UITableViewController - (void)viewDidLoad { [super viewDidLoad]; self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Close" style:UIBarButtonItemStyleBordered target:self action:@selector(close:)]; } -(void)close:(id)sender { [self.view removeFromSuperview]; } Thank You.

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  • How to configure a OCUnit test bundle for a framework?

    - by GuidoMB
    I've been developing a Mac OS X framework and I want to use OCUnit in my XCode 3.2.1 project. I've followed several tutorials on how to configure a OCUnit test bundle. The problem is that when I create a test case that uses a function that is defined in one of the framework's sources, I get a building error telling me that the symbol is not found. I made the test bundle dependent of my project's target as the tutorial said, but that doesn't seem to be problem. First I thought that I could solve this problem by dragging the framework's source files into the compile sources section within the Test bundle target, but then all the symbols referenced from that source file started to show up in the build errors, so that seems to not be a good solution/idea. How can I configure my unit test bundle so it builds properly?

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  • Should I create subclass NSManagedObject or not?

    - by TP
    Hi, I have spent a few days learning and writing NSCoding and finally got it working. However, it took very long to archive and unarchive the (quite complex) object graph, which is unacceptable. After searching the internet for some time, I think the better way is to use core data. Do you recommend that 1) I should rewrite all my classes as subclasses of NSManagedObject or 2) should I create an instance variable of NSManagedObject in each of my class so that any changes to the class also updates its core data representation? Doing either way will need significant changes to the exiting classes and I think I have to update lots of unit test cases as well if it changes the way the classes are initialized. What do you recommend? I really don't want to head to the wrong approach again... Thanks!

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  • PresentModalViewController from within UISplitViewController: weird behavior in landscape mode

    - by Krumelur
    Hi, I've been using PresentModalViewController a lot and never had any issues. But when showing a modal controller from within any controller hosted by a UISplitViewController I get strange orientation bugs. In my table view (which is root controller of the UISplitView), when a cell is touched, I call: MyController oModal = new MyController(); oModal.ModalPresentationStyle = UIModalPresentationStyle.FormSheet; oModal.ModalTransitionStyle = UIModalTransitionStyle.CrossDissolve; this.PresentModalViewControll(oModal, true); If the iPad is in Portrait, all is okay. If it is in landscape however, the modal controller fades in but its orientation is incorrect. Then, after fading in has finished, it suddenly flips 90 degrees and adjusts to correct orientation. I have overriden ShouldAutoRotateToInterfaceOrientation(), so that cannot be it. Ideas? René

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  • How can I build an app with multiple types of controllers?

    - by Sheehan Alam
    How can I accomplish the following: When my app loads a UIView will show 4 buttons Clicking on a button will load a UITabBarController (not a UIView with a UITabBar) that can display multiple views. This seems challenging to me, because in order for me to use the UITabBarController I need to add this to the window's subview in my appDelegate. By doing so, my app automatically will load with the UITabbarController in the root view.

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  • Resizing a UIView - expanding the top

    - by Mongus Pong
    I have a UIView inside of a UIScrollView that I want to resize. I can increase the height easily by : CGRect frame = self.drawinView.frame; frame.size.height += 100; self.drawinView.frame = frame; self.drawinScrollView.contentSize = CGSizeMake(frame.size.width, frame.size.height); And all is good. The above code will create a new area of the view at the bottom of the view that I can fill out. Now when I resize the view, I only want to be repainting the new portion of the view that has just been created. I dont want to have to repaint the whole view. However! I have run into difficulty when I need to expand the top of the view. Doing : CGRect frame = self.drawinView.frame; frame.origin.y -= 100; self.drawinView.frame = frame; self.drawinScrollView.contentSize = CGSizeMake(500, 600); does not work. How can I do this without having to repaint the entire view?

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  • How to use NSObject subclass?

    - by Jon
    So I've created a subclass of NSObject called Query @interface Query : NSObject @property (nonatomic, assign) NSNumber *weight; @property (nonatomic, assign) NSNumber *bodyFat; @property (nonatomic, assign) NSNumber *activityLevel; @end Is this correct for setting the object's property? In VC1: BodyFatViewController *aViewController = [[BodyFatViewController alloc]init]; aViewController.query = self.query; [self.navigationController pushViewController:aViewController animated:YES]; In VC2: - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { Query *anQuery = [[Query alloc]init]; anQuery.bodyFat = [self.bodyFatArray objectAtIndex:row]; anQuery.weight = self.query.weight; self.query = anQuery; }

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  • Not receiving touchesEnded/Moved/Cancelled after adding subView

    - by Sam
    Title more or less says it all. In response to a touchesBegan event, my UIViewController recolours itself and adds some subviews. It never receives the touchesEnded. I guess because the added subviews are somehow intercepting the event. I tried calling resignFirstResponder on the subviews to no avail. The code works fine when I don't add the child views and the touch events are called as normal. Any ideas? Thanks

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