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• UILabel: adjusting margins to match a UITextView

  - by Aran Mulholland

  I have a UILabel and if i adjust the size of the text i can make it look loke a UITextView however the left margin is different, on the UIlabel the text is right up against the left border where the UITextView has a slight margin. How do i adjust the UILabel so that when these controls are placed above one another, they look consistent?

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• UIScrollView and UIImage in it with paging enabled

  - by Infinity

  Hello guys! I need to display 10 - 1000 images on a UIScrollView. Paging is enabled. So every page of the scrollview is an image, it is an uiimage. I can load 10 images to 10 uiimages which stays in the memory, but with 1000 images I have problems on the iPhone or on the iPad. I am trying to unload and then load the images when I am doing scrolling. I every time displays 3 images. The current page image, and the -1 and +1 pages. When I am scrolling I unload the image and then load the next. With this method I have two problems. The scrolling is laggy and if I scroll very fast the images don't appear. Maybe is there any good solution for these problems? Can you suggest me one?

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• How to allow tap-to-focus on the camera using an overlay

  - by AJJ

  The standard 3GS iPhone camera includes tap-to-focus (I can tap to the region I want to focus on). However when I use a custom overlay using the UIImagePickerController class, the tap to focus does not seem to work. Everything else in terms of capturing images programmatically etc is working btw. Note that my overlay view is only a small rectangle (UIView) at the bottom of the screen. It does not cover the other areas of the camera. So I believe the taps should go through (unless I am missing something). I have seen other apps use an overlay and still provide a tap-to-focus functionality, so there must be a way to do this. I use all the default controls set to be hidden as: imagePicker.showsCameraControls = NO; imagePicker.toolbarHidden = YES; imagePicker.navigationBarHidden = YES; Of course changing the above does not let me tap-to-focus (it just enables the toolbars, etc). I could not find any answers on the UIImagePickerController class reference. Any help would be greatly appreciated. Thanks!

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• iPad <-> iPhone GameKit connection over bluetooth possible?

  - by Mike

  Has anyone established GameKit connectivity between an iPhone app running on an iPad and an iPhone app running on an iPhone? I tried the GKTank example and they won't connect. The iPad throws a "Error: 30509 -- Bluetooth not available.." error when trying to connect.

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• Core Location in iPhone Simulator 3.2 (iPad)

  - by choise

  So, i'm trying to port my app to iPad. I'm using CoreLocation. Apple says the iPad does have Location: Wi-Fi Digital compass Assisted GPS (Wi-Fi + 3G model) Cellular (Wi-Fi + 3G model) so it should be possible to get the position of my ipad (at least with 3g model) about 3km radius would be enought. but it doesnt work in simulator (3.2 ipad) (running 3.1.3 in simulator simulates me cupertino). is there a way to get the position in simulator (3.2 ipad) ? i live in germany and here the ipad isnt released yet, so i cannot test it on my device. thanks!

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• Double title bar issue iPhone app

  - by Nick Brunch

  I have noticed that whenever a phone call comes in while my app is in use (Or I simulate in-call status bar using the simulator), and the phone call ends, I end up with a double status bar in my app. The status bar goes away if I click any other tab and come back to the original tab (my app has a UITTabBar in it). I have tried so many options that I am losing track now. The most I have read are to set your UIView's size to be flexible in interface builder but nothing seems to work. Please look at the screenshots. I am pasting a default view of the sizing options in interface builder but believe me I have tried every single configuration option there.

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• Safari-style UIPopoverController from Toolbar

  - by Koning Baard XIV

  I'm creating an iPad application which needs a UIPopoverController like this one (I mean, with buttons): I tried usng a UIViewController but it gives me an enormous popup with a white background. Can anyone explain me how to make one? I cannot find any documentation or example code. Thanks.

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• iPhone UIControl and Subview

  - by Jack Thompson

  I currently have a UIControl, which has a number of subviews (image, label). Unfortunately when I use addTarget etc. It doesn't detect touches on the subviews. [myCustomView addTarget:self action:@selector(touchedView:) forControlEvents:UIControlEventTouchUpInside]; Is it possible for the UIControl to detect touches on subviews or should i be approaching it differently.

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• Android 2.0 App not available on 2.2 devices

  - by Craig

  Has anyone seen that their applications built against Android 2.0 (minSdkVersion="5") are not showing up at all in the market for 2.2 devices? Does anyone know a workaround (aside from building for 2.2). Thanks, Craig

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• Command /Developer/usr/bin/dsymutil failed with exit code 10

  - by Evan Robinson

  I am getting the above error message randomly (so far as I can tell) on iPhone projects. Occasionally it will go away upon either: Clean Restart XCode Reboot Reinstall XCode But sometimes it won't. When it won't the only solution I have found is to take all the source material, import it into a new project, and then redo all the connections in IB. Then I'm good until it strikes again. Anybody have any suggestions? [update 20091030] I have tried building both debug and release versions, both full and lite versions. I've also tried switching the debug symbols from DWARF with external dSYM file to DWARF and to stabs. Clean builds in all formats make no differences. Permission repairs change nothing. Setting up a new user has no effect. Same error on the builds. Thanks for the suggestions! [Update 20091031] Here's an easier and (apparently) reliable workaround. It hinges upon the discovery that the problem is linked to a target not a project In the same project file, create a new target Option-Drag (copy) all the files from the BAD target 'Copy Bundle Resources' folder to the NEW target 'Copy Bundle Resources' folder Repeat (2) with 'Compile Sources' and 'Link Binary With Libraries' Duplicate the Info.plist file for the BAD target and name it correctly for the NEW target. Build the NEW target! [Update 20100222] Apparently an IDE bug, now apparently fixed, although Apple does not allow direct access to the original bug of a duplicate. I can no longer reproduce this behaviour, so hopefully it is dead, dead, dead.

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• AndroidManifest from Jars

  - by Jeremy Edwards

  Is it possible to have an AndroidManifest.xml and or resource files in a Jar file and import that into a executable Android project? My goal is to provide styles, resources, and services from a jar library that can be accessed from a main android project for my common tools.

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• UIScrollview setContentOffset immediate animation?

  - by Jess

  Is there anyway to get the setContentOffset animation to happen immediately instead of waiting until the app returns to the main run loop? I tried setting the animation property to NO and nesting inside of an animation block but it still waits until returning to the main run loop. I've also tried using a sub method to perform the animation. My problem is I perform some heavy work after setting the contentOffset so the scroll view waits until this work is complete to animate the setting of the content offset so it appears to lag for a second.

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• Using kEAGLRenderingAPIOpenGLES2 causes bad access in glMatrixMode

  - by hyn

  I am trying to use the ES 2 API in my app but using kEAGLRenderingAPIOpenGLES2 causes bad access at glMatrixMode(). There is a similar question here but doesn't answer my question. If I use kEAGLRenderingAPIOpenGLES1 then everything is fine. I could reproduce the same problem with Apple's sample code. What can I do to make glMatrixMode() work in ES 2?

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• Animating corner like in iPhone's maps app?

  - by Konstantin

  Is there a way to make the same type of corner like in the maps app on the iPhone (or in the books app on the iPad when turning the pages)?

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• UIImage color changing?

  - by senthilmuthu

  hi, how can i change the UIImage's Color through Programming,any help pls?if i send UIImage, its color must be changed ..any help please? if i change rgb color like the following through bitmaphandling it did not work.i have given blackcolor's RGB value like 0,0,0.....

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• iPhone - strange error when testing on simulator

  - by lostInTransit

  Hi I was testing my app on the simulator when it crashed on clicking a button of a UIAlertView. I stopped debugging there, made some changes to the code and built the app again. Now when I run the application, I get this error in the console Couldn't register com.myApp.debug with the bootstrap server. Error: unknown error code. This generally means that another instance of this process was already running or is hung in the debugger.Program received signal: “SIGABRT”. I tried removing the app from the simulator, doing a clean build but I still get this error when I try to run the app. Can someone please let me know what I should do to be able to run the app on my simulator again. Thanks.

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• Turn a page (a UIWebView) with an animation

  - by Stefan

  Hi, I have a webview, which shows the pages of a ebook. I want to switch from one page to the next page with a page curl animation. By now, I'm know how to switch the page and how to apply a page curl animation on the webview. But how do I apply the curl animation in a way that it looks like flipping from one page to another?

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• Best FTP Objective-C wrapper for iPhone

  - by jamone

  I know you use the C based networking API to do FTP communication but I'd prefer to use something a little higher level. I've seen a few Objective-C based wrappers but I'm not sure what to use. I don't need that complex of FTP interaction. Its just the typical create/delete dirs, upload/download files... What do you recommend?

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• Memory management in objective-c

  - by prathumca

  I have this code in one of my classes: - (void) processArray { NSMutableArray* array = [self getArray]; . . . [array release]; array = nil; } - (NSMutableArray*) getArray { //NO 1: NSMutableArray* array = [[NSMutableArray alloc]init]; //NO 2: NSMutableArray* array = [NSMutableArray array]; . . . return array; } NO 1: I create an array and return it. In the processArray method I release it. NO 2: I get an array by simply calling array. As I'm not owner of this, I don't need to release it in the processArray method. Which is the best alternative, NO 1 or NO 2? Or is there a better solution for this?

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• Getting sectionNameKeyPath to work with CoreData/UITableViewController

  - by Elon

  In my AppDelegate I create an NSFetchedResultsController with sectionNameKeyPath set to @"group". In viewWillAppear in my TableViewController I performFetch, then call a method called findGroups. findGroups does some complicated analysis of the entire dataset to identify groups, then sets the "group" transient property on each object to the correct string value. I can see with NSLog that these are all set correctly and in coherent groups. But, tinker as I may, my cells are shown in a single section with the title of the first group. Any ideas?

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• Putting two picker control on single UIView.

  - by Amit Jain

  Hi I am having to picker controls on a single view with two outlets for each. Now when I select any of them same delegate methods are get called. How should we distinguish between which picker control has called the delegate ? Another question is can we change the frame size of the pickers to fit in one view? Thanks Amit

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• iPhone UISlider with two thumbs/indicators?

  - by ChrisW

  Is anyone aware of a version of the iPhone UISlider control with two thumbs? I need a control that will allow specifying a range of values. The UISlider API docs would imply this isn't possible with the standard control, so I was wondering if anyone had a solution for this (or had solved it themselves).

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• Clear UIWebView content upon dismissal of modal view (iPhone OS 3.0)

  - by Ricky

  I currently have a UIWebView that is displayed within a modal view. It is basically a detail view that provides a view of a page when the user clicks a link. When the view is dismissed and then brought up again (when the user clicks another link), the previously-loaded content is still visible and the new content loads "on top" of the last content. This makes sense because the instance of the UIWebView persists between sessions and is only released when the memory is needed. However, I would like to completely clear the UIWebView when the modal view is dismissed so that 1) content is cleared and 2) memory is freed. Thus far my research and attempts have not found an answer. These links haven't worked for me: http://stackoverflow.com/questions/2184688/is-it-possible-to-free-memory-of-uiwebview http://stackoverflow.com/questions/2311564/reused-uiwebview-showing-previous-loaded-content-for-a-brief-second-on-iphone I've tried [[NSURLCache sharedURLCache] removeAllCachedResponses]; and setting the webView to nil and manually releasing the webView upon modal-view-dismiss to no avail. Any thoughts from the wizened masses?

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• UIButton on UIScrollView can't work

  - by william-hu

  Hi, i used UILabel *myLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 180, 180)]; myLabel.backgroundColor = [UIColor greenColor]; [self.view addSubview:myLabel]; UIButton *myButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [self addTarget:self action:@selector(show) forControlEvents:UIControlEventTouchDown]; myButton.frame = CGRectMake(80.0, 120.0, 30, 30); myButton.showsTouchWhenHighlighted = YES; [self addSubview:myButton]; in this way the button works(call show:), but use [myLabel addSubview:myButton]; the button can't work. who can tell me why? I have tried to change the target to myLabel, can't work too.So who can tell me,thank you. By the way , i want to use the button on the UILabel,and the UILabel on UIScrollView.Thanks a lot!

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• Why is my app delegate's didFinishLaunchingWithOptions method all of sudden being called AFTER my Ro

  - by BeachRunnerJoe

  Hi. I've been playing with the iPad's SplitView template in Xcode. Here are two of the many important methods that are auto-generated for you by the Split View-based Application template... AppNameAppDelegate.m #pragma mark - #pragma mark Application lifecycle - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after app launch rootViewController.managedObjectContext = self.managedObjectContext; // Add the split view controller's view to the window and display. [window addSubview:splitViewController.view]; [window makeKeyAndVisible]; return YES; } RootViewController.m #pragma mark - #pragma mark View lifecycle - (void)viewDidLoad { [super viewDidLoad]; self.clearsSelectionOnViewWillAppear = NO; self.contentSizeForViewInPopover = CGSizeMake(320.0, 600.0); NSError *error = nil; if (![[self fetchedResultsController] performFetch:&error]) { NSLog(@"Unresolved error %@, %@", error, [error userInfo]); abort(); } } When you build and run the project before making any changes at all, the application:didFinishLaunchingWithOptions method is called before the RootViewController:viewDidLoad method is called. I'm new to iPhone development, but I'm assuming this is the correct and typical sequence. However, as soon as I changed the RootViewController code and set it as a subclass of UIViewController (instead of UITableViewController by default), and made the respective adjustments in Interface Builder, suddenly the RootViewController:viewDidLoad is being called before the application:didFinishLaunchingWithOptions method. I need to get it back to the way it was working before because, as you can see in the code, the viewDidLoad method depends on didFinishLauchingWithOptions method to execute so it can set the rootViewController's managedObjectContext that it uses to perform the fetch request. Any ideas what caused this? Any ideas how I can fix this? Thanks so much in advance for your help! I'm gonna keep researching and playing with the code.

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