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• Android Color Picker

  - by GuyNoir

  Does anyone know of a quick color picker widget that I could grab to use in my application? I've seen one in a few different applications that has a wheel with colors, and that you tap in the center to select, but I'm not sure where to find it. Google brings up nothing. Any color picker would be fine though. Thanks.

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• How to let the sortedArrayUsingSelector using integer to sort instead of String?

  - by Tattat

  I have some data like this : 1, 111, 2, 333, 45, 67, 322, 4445 NSArray *array = [[myData allKeys]sortedArrayUsingSelector: @selector(compare:)]; If I run this code, it sorted like this: 1, 111, 2,322, 333, 4445, 45, 67, but I actually want this: 1, 2, 45, 67, 111, 322, 333, 4445 How can I implement it? thz u.

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• Beginning 3.2+ iPhone development

  - by Dinah

  I'm interested in learning Objective C for iPhone development. This is a topic which I realize has been covered to death. The qualifying difference is: I'd like to start learning beginning with the latest version (the most recent iPhone OS as of May, 2010 is ver. 3.2 and 4 beta is also out). I'd like to not have to wade through or unlearn legacy information. Using the links I've found throughout related topics on Stack Overflow, I'll read a blog post or tutorial which will say one thing, but then the comments will say, "this is different now in version xyz." For example, I've found this a few times regarding memory management/garbage collection. I assume that Apple's "getting started" doc.s will have the most recent info but many SO posts have said that those are not the most clear. The Stanford iPhone course looks great, but how do I know if it still applies to the most recent versions? Where should one start learning Objective C for iPhone development starting with version 3.2 or later without having as much exposure to legacy information?

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• Adding a UIBarButtonItem to a programattically allocated UINavigationBar

  - by iamdadude

  I have a cameraoverlayview that allocates a UINavigationBar to the top of the screen like this - CGRect navbarFrame = CGRectMake(0, 0, 320, 44); navigationBar = [[UINavigationBar alloc] initWithFrame:navbarFrame]; navigationBar.delegate = self; Now I want to add a UIBarButtonItem as the left button to the navigation bar, but the standard navigationbar.leftitem doesn't work. So I tried doing this - closebutton = [[UIBarButtonItem alloc] initWithTitle:closebuttontext style:UIBarButtonItemStylePlain target:self action:@selector(close)]; navigationBar.topItem.leftBarButtonItem = closebutton; But it doesn't work either. Can anyone point me in the right direction? As far as the navigation bar loading up correctly in the cameraoverlayview, it works 100%.

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• Converting NSMutableData to NSString Problem

  - by Sheehan Alam

  initWithData does not convert my data object into a string properly. When I check the length of the data object, it has a value. NSMutableData* receivedData =[[NSMutableData data] retain]; NSString* json_string = [[NSString alloc] initWithData:receivedData encoding:NSUTF8StringEncoding]; Am I doing something wrong creating the string?

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• iPhone offline reading

  - by Andy

  Hi, first of all - I am quite new to iPhone App development (3 months). I am working for a software company that offers a content management system. Our customers are for the main part publishing houses for magazines. They use our software to write articles to their homepages. Now we want to offer iPhone Applications to go with our cms. What I have accomplished so far is an RSS reader that shows newly published articles in a list view. The user selects one article and is redirected to a specially formatted detail view of this article. The next step is to add offline reading capabilities. I have searched the internet up and down but couldn't find anything like a best practice for that. I get it that there are two possibilities in general: Store the contents of the uiwebview locally on the iPhone/iPad (including css, images, js and so on). There would be the need to rework the basic html to use the downloaded css, images and js. Also I would have to somehow edit hyperlinks to following pages in multipage articles - Sounds like a lot of work ;) Create a PDF on the server side and download that to the mobile device. Rework the RSS Source to point to the locally saved pdf instead of the website on the server. My question is - what is the better way to go? Are there any downsides for either of the possibilities? Are there other (simple ;)) ways to implement offline reading features? Are there possibly any howto's that I could've missed? Thanks y'all!

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• The accossoryView of a UITableViewCell disappears after the visible view is changed

  - by Luca

  Hi! I'm experiencing this strange situation. I have a UITableView where, when the user selects a cell, a long (network) process begins. So, I performed this in a background thread and I placed (in the didSelectRowAtIndexPath) a UIActivityIndicatorView as the accessory view. This is what I wrote: UITableViewCell* cell = [self.tableView cellForRowAtIndexPath:indexPath]; UIActivityIndicatorView* activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite]; cell.accessoryView = activityView; [activityView startAnimating]; [activityView release]; everything seems to work correctly, except that, if during a loading process (when the indicator is animated), I switch the view using a UITabBar, when I go back to the UITableView, the UIActivityIndicatorView that should still be there has disappeared. Any idea of what I did wrong? Thanks!

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• NSURLConnection still calls delegate AFTER cancel method has been called

  - by Shizam

  Hi All, Having a problem with NSURLConnection, if I create a NSURLConnection and call [connection connectionWithRequest] let it load a little then call [connection cancel] most of the time that works fine. However occasionally even after I call [connection cancel] the connection's delegate still gets called (which crashes the app). Googling around it looks like the problem here is a race condition in the runloop, I cancel the connection and release the delegate but before the runloop cycles it calls the delegate functions - crash. Is there a way for me to, after I call [connection cancel] confirm the connection has actually canceled? Even a crappy while() loop will do :(

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• CGPath and Quartz 2D

  - by iphonedevnoob

  I want to create a triangle using Quartz 2D functions. The 3 edges of the triangle should be in different colors. I am able to create the triangle but not able to set the color of each edge or subpath separately. Any suggestions or sample code are much appreciated.

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• iPhone: Get indexPath of Predicate Object

  - by Nic Hubbard

  I am using a predicate to find an object in core data. I can successfully find the object that I want, but I need to also get the indexPath of that object, so that I can push a details view in for that object. Currently I have the following code for getting my object: NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; [fetchRequest setEntity:[NSEntityDescription entityForName:@"Ride" inManagedObjectContext:self.managedObjectContext]]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"title = %@ AND addressFull = %@", view.annotation.title, view.annotation.subtitle]; [fetchRequest setPredicate:predicate]; NSMutableArray *sortDescriptors = [NSMutableArray array]; [sortDescriptors addObject:[[[NSSortDescriptor alloc] initWithKey:@"title" ascending:YES] autorelease]]; [sortDescriptors addObject:[[[NSSortDescriptor alloc] initWithKey:@"addressFull" ascending:YES] autorelease]]; [fetchRequest setSortDescriptors:sortDescriptors]; [fetchRequest setReturnsObjectsAsFaults:NO]; [fetchRequest setPropertiesToFetch:[NSArray arrayWithObjects:@"title", @"addressFull", nil]]; NSError *error = nil; NSArray *fetchedItems = [self.managedObjectContext executeFetchRequest:fetchRequest error:&error]; // Sohow what record we returned NSLog(@"%@",[fetchedItems objectAtIndex:0]); So, I can correctly get my object into an array. But how do I translate that object into an indexPath?

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• AVAudioRecorder Won't Record On Device

  - by Dyldo42

  This is my method: -(void) playOrRecord:(UIButton *)sender { if (playBool == YES) { NSError *error = nil; NSString *filePath = [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat: @"%d", [sender tag]] ofType:@"caf"]; NSURL *fileUrl = [NSURL fileURLWithPath:filePath]; AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:fileUrl error:&error]; [player setNumberOfLoops:0]; [player play]; } else if (playBool == NO) { if ([recorder isRecording]) { [recorder stop]; [nowRecording setImage:[UIImage imageNamed:@"NormalNormal.png"] forState:UIControlStateNormal]; [nowRecording setImage:[UIImage imageNamed:@"NormalSelected.png"] forState:UIControlStateSelected]; } if (nowRecording == sender) { nowRecording = nil; return; } nowRecording = sender; NSError *error = nil; NSString *filePath = [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat: @"%d", [sender tag]] ofType:@"caf"]; NSURL *fileUrl = [NSURL fileURLWithPath:filePath]; [sender setImage:[UIImage imageNamed:@"RecordingNormal.png"] forState:UIControlStateNormal]; [sender setImage:[UIImage imageNamed:@"RecordingSelected.png"] forState:UIControlStateSelected]; recorder = [[AVAudioRecorder alloc] initWithURL:fileUrl settings:recordSettings error:&error]; [recorder record]; } } Most of it is self explanatory; playBool is a BOOL that is YES when it is in play mode. Everything works in the simulator however, when I run it on a device, [recorder record] returns NO. Does anyone have a clue as to why this is happening?

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• how we can show UIView by using cocos2d with animation?

  - by lee

  how can i show a UIView using cocos2d with animation, i have used code like: [[[Director sharedDirector] openGLView] addSubview:myView]; but this without any animation, so how can we do it?

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• Image "moves" when varying heightForRowAtIndexPath in UITableViewCell.

  - by Kalle

  I have a table view with varying height, as defined in the heightForRowAtIndexPath. For some very odd reason, the image is "indented" to the right based on the height; if the height is low enough, the image is stuck to the left side of the cell, but as the height increases, the image for said cell is shifted rightward compared to other rows. The result of this is a very poor looking list, with images floppily laid out in a zig-zag pattern depending on the height of each individual row. The problem is revealed by this simple example: - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return (indexPath.row+1) * 50; } Each cell is set up (simplified) as a "Subtitle" style cell with: // ... cell.textLabel.text = @"foo"; cell.detailTextLabel.text = @"bar"; cell.imageView.backgroundColor = [UIColor redColor]; // for debugging; i have images with transparent bg cell.imageView.image = anImageThatIs55x50pixelsBig; return cell; Any ideas? My head bleeds from the wall-love-affair. Edit: uploaded a screen which displays this. The "image" is just a screenshot of a tiny area of the screen which makes it look a little weird, but you get the picture I'm sure: http://img28.imageshack.us/img28/549/screenshot20100311at172.png

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• Right to Left UI in iPhone (Hebrew)

  - by Reflog

  Hello, I'm struggling in creating a RTL UI in iPhone application. The framework doesn't seem to have any support for RTL languages. The only thing is the alignment inside labels, which is nice, but it conflicts with other controls behaviour. The question is: Is there a working code for a RTL TableView? Something that would handle the disclosure buttons to be on the left, section titles to be right aligned, index view to be left aligned? As far as I understand I cannot move the index view of the tableview, i have to overlay some custom control... Any suggestions/pointers/examples? p.s. this is not a duplication of this question: http://stackoverflow.com/questions/1677988/right-to-left-alignment-for-uitableview since what I am looking for is a deeper customization, not just a new type of CellView. (Update: Mar 10) For now - I've removed support for indexView from the tableView at all, implemented the cells as custom views by myself (with disclosure buttons on the left), and customized the header/footer of the table as well. the only thing that is left is the Index View. Thanks in advance!

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• UINavigationController from UIViewController

  - by 4thSpace

  I currently have this workflow in a tab based app: Tab1 loads... ViewOne : UIViewController >> PickerView : UIViewController >> DetailView : UIViewController "" means loads based on user action. I'd like navigation bars on PickerView and DetailView. PickerView just needs a cancel button in the top left of its nav bar. DetailView needs the normal navbar back button. I already have PickerView's nav bar wired up through IB and working. I'm not sure what to do with PickerView's nav bar. PickerView is also loaded from Tab2, who's main view starts as a UINavigationController. PickerView's nav bar works fine in that case. ViewOne should not have a navigation bar. Any ideas?

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• Iphone-exif 0.91 not working when I add it to my project, gives error ".objc_class_name_EXFJpeg", r

  - by user295944

  When I add libiphone-exif.a to snapandrun in objectiveflickr I get this error: ".objc_class_name_EXFJpeg", referenced from: literal-pointer@__OBJC@__cls_refs@EXFJpeg in SnapAndRunViewController.o ld: symbol(s) not found collect2: ld returned 1 exit status I do not know what this means, I follow the guide to add it, add all of the .h files and the libiphone-exif.a Is there something special I have to do?

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• NavigationController pushViewController problems.

  - by Jacek

  Hello. I have created new a view controller in my project (ActivateController). I have added it to the interface of the parent view controller (PrefsViewController): #import <UIKit/UIKit.h> #import "ActivateController.h" @interface PrefsViewController : UIViewController <UITextFieldDelegate> { ActivateController *activateController; } -(IBAction)pressedActivate; @property(nonatomic,retain) IBOutlet ActivateController *activateController; @end I have also added it to parent's controller nib (and changed it type to ActivateController), and connected it to IBOutlet ActivateController. But still, when I perform (on pressedActivate): [self.navigationController pushViewController:activateController animated:YES]; Nothing happens. I have done it successfully many times before. What might be wrong? P.S. pressedActivate is executed for sure (I used NSLog to check).

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• 'NSInvalidArgumentException' UIButton IBAction Error

  - by Graeme

  Hi, I have a button in a view which refuses to work. I've got in working in a blank, default view application from X-Code, but in none of my applications will it work, instead it gives me the following error. Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[UIViewController showVicInfo:]: unrecognized selector sent to instance 0x3c084f0' The debugger isn't any help either. I've made sure that I hook up the button to the file's owner (not the other way around) as well. Below is the code for the action. And I know it's not the alert view, because the breakpoint doesn't even reach there. about.h @interface about : UIViewController { } -(IBAction)showInfo:(id)sender; about.m -(IBAction)showVicInfo:(id)sender { UIAlertView *myAlert = [[UIAlertView alloc] initWithTitle:@"No Internet Connection" message:@"You require an internet connection via WiFi or cellular network for iFirelert to work." delegate:self cancelButtonTitle:@"OK, thanks" otherButtonTitles:nil]; [myAlert show]; [myAlert release]; }

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• IPad App Issue - Webview

  - by Manoj Khaylia

  Hi all I developing a Ipad application I am trying to use Webview but not able to open the URL in webview I am using following code NSURL *fileURL = [[[NSURL alloc] initWithString:@"http://www.google.com/"] autorelease]; NSURLRequest *requestObj = [NSURLRequest requestWithURL:fileURL]; [webview loadRequest:requestObj]; this code working well for Iphone app not not working for Ipad app. Is anything wrong. Thanks Amit Battan

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• scroll image using UIscrollview

  - by summer

  i looked at the example from the iphone dev: http://developer.apple.com/iphone/library/samplecode/Scrolling/index.html everything looks cool except that for 5 image they set the "const NSUInteger kNumImages = 5;" what happens is that what if i have 1000 images?and i wan to view it without having to change the number everytime?also if i will to set the number to 1000 and i have only 10 images then in the simulator the user can scroll "blank view" till it reaches count 1000! help please..thanks

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• Numeric keyboard dismiss???

  - by shishir.bobby

  HI all, I am having a 2 textFeild and 1 textview. out of 2 textfeild,one textfield requires number to be filled in there. so for that i hv provided numeric keyboard. i m not able to dismiss numeric keyboard,since i cant c any option to hit the numeric keyboard dismiss. is it possible to dismiss numeric keyboard ?? if yes than can anyone guide me through. regards shishir

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• Storing custom objects in an NSMutableArray in NSUserDefaults

  - by shishir.bobby

  HI, How can i store NSMutable array in NSUserDefaults? regards shishir

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• Set the width and height for a TTLauncherItem

  - by Koning Baard

  I have this: _launcherView.pages = [NSArray arrayWithObjects: [NSArray arrayWithObjects: [[[TTLauncherItem alloc] initWithTitle:@"New Note" image:@"bundle://Icon.png" style:TTSTYL URL:@"http://www.google.com/" canDelete:NO] autorelease], [[[TTLauncherItem alloc] initWithTitle:@"To Do Items" image:@"bundle://Icon.png" URL:@"http://www.yahoo.com/" canDelete:NO] autorelease], nil], nil]; How can I set the width and height for the items? I want all items to be 64x64 pixels. Thanks

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• Android camera intent.

  - by Aleksander O

  Hi I need to push an intent to default camera application to make it take a photo, save it and return an URI. Is there any way to do this?

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• UITextView insert text in the textview text

  - by John Smith

  I want to have to occasionally insert text into the UITextView text object. For example, if the user presses the "New Paragraph" button I would like to insert a double newline instead of just the standard single newline. How can I go about such? Do i have to read the string from UITextView, mutate it, and write it back? Then how would I know where the pointer was? Thanks

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