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• Mobile Safari Geolocation API Issues

  - by sph

  Hi, since Mobile Safari's Geolocation API should be an implementation of the W3C Geolocation API I found some bugs. I was wondering if anybody noticed the same. As specified in the W3C Geolocation API the PositionCallback returns a Position object, which contains a Coordinates object. In this object all attributes are of type double. Using navigator.geolocation.getCurrentPosition and checking the Position object in the successCallback the accuracy attribute is always an object, but should be a double. The heading attribute is always -1 when testing in the iPhone simulator, but should be null or between 0 and 360. 2. Setting the options parameter for navigator.geolocation.watchPosition or navigator.geolocation.getCurrentPosition as specified in the W3C Geolocation API has no effect. No matter what is set as the timeout value, the win callback is called every 10 seconds. For example setting the timeout=1000 should immediately call either the successCallback or errorCallback. Thanks

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• How do I set the current point in a CG graphics context?

  - by Joe

  When running the code below in the iphone simulator I get the error : CGContextClosePath: no current point. Why is the current point not being set? Or is the context not set to the correct state? CGContextBeginPath(ctx); CGMutablePathRef pathHolder; pathHolder = CGPathCreateMutable(); //move to point for the initial point NSLog(@"Drawing a state point %f, %f", [[holder.points objectAtIndex:0] floatValue], [[holder.points objectAtIndex:1] floatValue]); CGPathMoveToPoint(pathHolder, NULL, [[holder.points objectAtIndex:0] floatValue], [[holder.points objectAtIndex:1] floatValue]); for(int x = 2; x < [holder.points count] - 1; x += 2) { NSLog(@"Drawing a state point %f, %f", [[holder.points objectAtIndex:x] floatValue], [[holder.points objectAtIndex:(x+1)] floatValue]); CGPathAddLineToPoint(pathHolder, NULL, [[holder.points objectAtIndex:x] floatValue], [[holder.points objectAtIndex:(x+1)] floatValue]); } CGContextClosePath(ctx); CGContextFillPath(ctx);

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• how to play video files by using UITableView?

  - by srikanth rongali

  Hi, In my iPhone application I need to show a video image in UITableView. Each tableViewCell have video and some labels. I used the MPMoviePlayerController for showing video in full screen when the cell is selected. But, I am getting error that MPMoviePlayerController class is not there. I tried using UIWebView. But, I could not make it. How can I play a video, when the cell is selected. Some say that videos do not play in simulator. They only play when we test in device. Is it right ? Please help me with the solution. Thank You.

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• UITableViewController's TableView becomes NULL

  - by Travis

  I have UITableViewController (initiated by the Navigation-based app project template). I am overriding loadView and putting up an alternative view (w/ a UILabel and UIActivityIndicator) to display while the table's contents is loading. When the loading is done, I remove the loading view and try to display the table view but I see that it's NULL. So in the simulator I see my loading view and then when the loading's done the view disappears but my tableview never comes. I'm confused what the difference is between self.view and self.tableView in my UITableViewController and how I can exchagn

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• HOw to use UIIMagePickerController?

  - by aman-gupta

  Hey, IN my application I m using this code on button click for getting image from PhotoLibrary:- -(IBAction) getPhoto:(id) sender { UIImagePickerController *picker = [[UIImagePickerController alloc]init]; picker.delegate = self; picker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary; [self presentModalViewController:picker animated:YES]; [picker release]; //picker = nil; } -(void)imagePickerController:(UIImagePickerController *) picker didFinishPickingMediaWithInfo:(NSDictionary *)info { imageView.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"]; [picker dismissModalViewControllerAnimated:YES]; } But problem is that when i run my application in mobile it will get terminated on button click.Where I m wrong it works properly on iphone simulator but termninating on iphone Device Please reply me its urgent Thanks in Advance

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• IB not responding to UIImageView moving

  - by Rudiger

  This an incredibly annoying bug. I had a imageView and 2 Labels in a customCell nib. I changed the locations of all of them in the nib and the labels moved, view didn't. I've cleaned my targets, deleted everything relating to it the library, deleted the cell completely, reset the simulator, built it on a different target (3.1.2) and it still compiles the image in the same stupid spot. Can anyone help this is nuts. Sorry for being blunt but completely frustrated. Edit: I have deleted the nib and created it over again by hand, but with the same names. Doesn't fix it. I've checked to see if im moving it somewhere in the code and no dice.

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• Rails redirect_to jQTouch site does not work as expected

  - by tilthouse

  I have a Rails app with a jQTouch mobile site that is displayed if the user goes to m.blah.com. First, I detect the browser, then to a redirect_to m.blah.com if it's an iphone, etc. All well and good. When I use desktop Safari, this all works exactly right. However, when I use an actual iPhone or the Apple iPhone Simulator, it does not. The mobile site appears to load without the browser actually doing the redirect. The URL in the browser is still www. I am wondering if this behavior is due to Mobile Safari, or if it is somehow jQTouch trying to load the page with AJAX, not a reload (which is odd as jQTouch hasn't been loaded at all before the redirect). Any ideas?

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• iPhone - Browsing iPhone files through computer

  - by quano

  I want to be able to send files from an iPhone app to a computer. What would be the easiest way of doing this? I've made simple server client programs before, but in those, the client has always needed to connect to the server before being able to receive messages from it. There is an app for the iPhone called iSimulate, where you put a server on a Mac (the iPhone simulator), and then you use the iSimulate app of an iTouch or iPhone to send touch events to the server. This app does not require you to type in an ip-address. Instead it presents a list of available computers that have this server up and running. How exactly is this being done? Can a server broadcast a message over a network, w/o anyone being connected to the server? How does that work? How does a client listen for that broadcast? Here's a video of the app I'm talking about: http://www.youtube.com/watch?v=N3Qpd1ycZh4

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• Limit to area that receives touch events

  - by Typeoneerror

  Is there's a bounding box on an application that receives touch events? I created a few sample round rect buttons and placed them in different places in my view. The ones in the center of the view receive touch events (and show the highlighted blue color) but if I place a button near the edges of the view, only parts of them are clickable in the simulator. Is this because of Apples style guidelines? I placed a button exactly where a UITabNavigationItem would appear and only the bottom half of it is clickable.

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• connect tableView + tableView

  - by totato

  Right now I have an indexed tableview that goes to a detail view but i want it to go to another tableview then a detail view. my code like this: ` - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { displyAnnController *anController = [[displyAnnController alloc] initWithNibName:@"AnnView" bundle:[NSBundle mainBundle]]; DetailViewController *dvController = [[DetailViewController alloc] initWithStyle:UITableViewStyleGrouped]; switch (indexPath.row) { case 0: [self.navigationController pushViewController:anController animated:YES]; [anController release]; anController = nil; break; case 1: [self.navigationController pushViewController:dvController animated:YES]; [dvController release]; dvController = nil; break; default: break; }` and when I press the cell with index 0 in the simulator, the program is crash! what's the problem? pleas help me ..

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• iphone problem adding splashscreen

  - by zebra

  hi all, i've a little problem, i've add a default.png in my app and it work. I've modify my file, delete file and reference and upload my new file. On my iphone the image does not appear, only some second of blackscreen and after my app start. In the simulator the splashscreen appear. I've try to delete my app on iphone, make a clean all and rebuild & install but nothing... I've try to make clean all, close xcode, delete default.png to my project directory (sometimes exist, sometimes no), open xcode, add my file and build & install on my iphone but nothing... Any ideas?

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• Prevent status bar from receiving touch events

  - by Typeoneerror

  Edit After further testing, it appears that the part of my button that are not clickable are where the status bar used to be. I'm hiding the status bar with : // -- Override point for customization after app launch [[UIApplication sharedApplication] setStatusBarHidden:YES]; But it's still receiving touches. Any idea on how to disable this? Is there's a bounding box on an application that receives touch events? I created a few sample round rect buttons and placed them in different places in my view. The ones in the center of the view receive touch events (and show the highlighted blue color) but if I place a button near the edges of the view, only parts of them are clickable in the simulator. Is this because of Apples style guidelines? I placed a button exactly where a UITabNavigationItem would appear and only the bottom half of it is clickable.

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• Texture allocations being doubled in iPhone OpenGL ES

  - by Kyle

  The below couple lines are called 15 times during initialization. The tx-size is reported at 512 everytime, so this will allocate a 1mb image in memory 15 times, for a total of 15mb used.. However, I noticed instruments is reporting a total of 31 allocations! (15*2)+1 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, tx-size, tx-size, 0, GL_RGBA, GL_UNSIGNED_BYTE, spriteData); free(spriteData); Likewise in another area of my program that allocates 6 256x256x4 (256kB) textures.. I see 13 sitting there. (6*2)+1 Anyone know what's going on here? It seems like awful memory management, and I really hope it's my fault. Just to let everyone know, I'm on the simulator.

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• Gson module not found Blackberry Java application

  - by Curro

  Hi. I'm developing a simple application for Blackberry and i'm using Google's gson to retrieve some data from a server. The UI was working fine but when I added the gson part it started failing, it wont run. When I run the application in the simulator it show this error: "Uncaught: RuntimeException" on that annoying white screen of death and after holding the click button I can see that there is an alert dialog that says "Module 'gson-1.4' not found". However I did added "gson-1.4.jar" in the Project's Properties - Java Build Path - Add External JARs... also, the Gson objects are recognized at my code, no syntax errors at my code. BTW, I'm using Eclipse and the most recent Blackberry SDK Please help

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• meta refresh for redirection not working in BlackBerry

  - by Tanto

  Hi.. I asked this question here but don't get reply so far. I hope posting it too here is ok. For page redirection, in a mobile site development, I am using <meta http-equiv="refresh" content="0;URL=/pagetwo.jsp"/> because it is required to work when Javascript is off. However, I find it working only in BlackBerry (BB) simulator, not in real BB (I tried with BB 8250 and 9700). Could anyone help me please, what could be the reason. Thanks.

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• Using images and css file for a generated HTML UIWebView

  - by Tom

  Hi! I'm generating an HTML file for an app, and in this HTML file there's a link to a stylesheet and one to an image. Here's what I tried so far: NSMutableString *toReturn = [NSMutableString stringWithCapacity:100]; NSString *cssPath = [[NSBundle mainBundle] pathForResource:@"etapes.css" ofType:nil]; [toReturn appendFormat:@"<html><head><title></title><link href=\"%@\" media=\"all\" rel=\"stylesheet\" type=\"text/css\" /></head><body>", cssPath]; It generates the right full path to the right file, this is okay if I want to access it on my mac, but on the simulator or my iPhone it doesn't point to the right place at all... Do you have any idea of how could I make this? Thanks

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• NSEntityDescription entityForName returning nil

  - by Kamchatka

  Hi, I did some changes to my model (but I don't want migration yet, so I just remove the application, built clean etc.) so my application works in the simulator. However, when I run it on the iPhone, I get the following error: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'executeFetchRequest:error: A fetch request must have an entity.' I set the entity like this: NSEntityDescription *entity = [NSEntityDescription entityForName:@"Document" inManagedObjectContext:managedObjectContext]; My managedObjectContext is not nil. But I suspect that it doesn't load the object model correctly or something similar because If I display the entities in the model, the list is empty. How can I make sure the model is loaded? Thanks,

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• iPhone OpenGLES textures - colour banding

  - by chicknstu

  I've got a problem with openGL on iPhone which I'm sure must have a simple solution! When I load a texture and display it, I get a lot of what I believe is called 'Colour Banding', whereby the colours, particularly on gradients, seem to get automatically 'optimized'. Just to demonstrate that this wasn't anything wrong with my own code, I downloaded the iPhone 'Crashlanding' app and replaced the background image, and as you can see in the image below (Taken from the simulator), the exact same thing happens. The image on the left is the original PNG, and on the right is it in the game. It's almost as if it's palette is being downsized to a 256 colour one. Screenshot I'm sure this is related to the format I'm saving the image as, although it doesn't just happen with PNG's, it seems to happen no matter what image format I chose. Doing my head in! If you want to recreate this, simply download the crash landing app, and replace the background. Thanks so much in advance for any help.

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• Gears or HTML5 Location API on Android 1.5

  - by Dmitry

  Hi there, I am trying to use gwt-mobile-webkit, particularly its location api. It works well with iPhone (both device and simulator) and Firefox and on G1 with 1.6 Android, however, it does not work on G2 with Android 1.5 on it. In result I am getting onFailure callback with Permission Denied error. So it seems, that there is some geolocation API (gears or HTML5) in the browser available, but it just does not want to ask user for granting permissions. Do you know if there is any workaround or just enable it somewhere in settings?

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• Swapping UIImages causing 'unrecognized selector sent to instance' ?

  - by user158103

  Error: [__NSCFDate drawAtPoint:]: unrecognized selector sent to instance 0xd251e0 Termininating app due to uncaught exception 'NSInvalidArgumentException' Scenario: for the most part this works. But I notice this error, even on the simulator, when I swapping UIImages, slowly, but consistently. For example, I have a retained reference to a UIImage that im drawing. By the click of a picker control I am changing the face image (this occurs in another view-controller). I can consistently recreate this error by continuously changing the faces. It usually crashes at about the 4th swap or more. My theory: It's not loading the image, therefore the image reference is nil. I know ive read a bit about UIImage being cached, so I wouldnt think im running out of memory. Any ideas? Thanks!

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• Code coordinates to match compass bearings

  - by pinnacler

  Right now in Matlab (0,0) is the origin, 0 degrees / 2pi would be to the right of the cartesian plane and angles are measured counter clockwise with 90 degrees being at the top. I'm trying to write a simulator where the coordinates would match a compass bearing. 0/360 degrees or 2pi would be at the top and 90 degrees would be on the right. Any idea how to code in Matlab or c++? I'd imaging it'd be a matrix flipped about the x axis and rotated 90 degrees but I'm at a total loss. Phil

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• How can I get a writable path on the iPhone?

  - by Kendall Helmstetter Gelner

  I am posting this question because I had a complete answer for this written out for another post, when I found it did not apply to the original but I thought was too useful to waste. Thus I have also made this a community wiki, so that others may flesh out question and answer(s). If you find the answer useful, please vote up the question - being a community wiki I should not get points for this voting but it will help others find it How can I get a path into which file writes are allowed on the iPhone? You can (misleadingly) write anywhere you like on the Simulator, but on the iPhone you are only allowed to write into specific locations.

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• Python: Traffic-Simulation (cars on a road)

  - by kame

  Hello! I want to create a traffic simulator like here: http://www.doobybrain.com/wp-content/uploads/2008/03/traffic-simulation.gif But I didn't thougt very deep about this. I would create the class car. Every car has his own color, position and so on. And I could create the road with an array. But how to tell the car where to go? Could I hear your ideas? EDIT: Is it forbidden to get new ideas from good programmers? Why do some people want to close this thread? Or were to ask such questions? I dont understand them. :(

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• Format number as I type Expand this post

  - by conorhiggins

  Hi I am working on an app at the moment that requires number input to be formatted as the textfield changes as well as perform a calculation. I have the text fields set up so that as the user types notifications are passed out and a calculation is performed. However what I need to do now is format the text to be in this style: €1,000,000 rather than 1000000. I have this working for the output of the calculation already but everytime I try to apply it to the input text the simulator seems to crash or at least freezes for a while. I'd imagine its a simple enough fix.

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• xCode 3.2.1 Alien Leak

  - by Mark

  Used code in entire project: - (void)applicationDidFinishLaunching:(UIApplication *)application { UITabBarController *tb = [[UITabBarController alloc] initWithNibName:nil bundle:nil]; [window addSubview:tb.view]; [tb release]; [window setBackgroundColor:[UIColor blackColor]]; [window makeKeyAndVisible]; } When the UITabBarController is added to the window view the following leak is detected bij Instruments: Leaked Object: Malloc 128 Bytes Address : 0x391ee70 Size : 128 Bytes Responsible Library : CoreGraphics Responsible Frame : open_handle_to_dylib_path This same issue occurs with UINavigationController, but does not appear with UIViewController. Specs: Mac OS X 10.6.2 xCode 3.2.1 Instruments 2.0.1 Compiled for iPhone Simulator 3.1.3 | Debug

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