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  • iphone app working on most devices but not a few

    - by Matt Facer
    Hi there. I have recently been rewriting some of my iphone app because a couple of users have said it was crashing on certain events. The event in question is when I add a new XIB to the view using the following code AddItemViewController * add_item = [[AddItemViewController alloc] initWithNibName:@"AddItem" bundle:[NSBundle mainBundle]]; [self presentModalViewController:add_item animated:YES]; [add_item setViewFormat:2]; [add_item release]; it works perfectly on my iphone and a mate's ipod touch (both running 3.1.3) but another user on an ipod touch also with 3.1.3 says it crashes when the function above is called. Why could this be happening? Surely if it works on one device it should work on another?! Is there a better way to add a view which maybe doesnt crash? I have also disabled all the code on the loading xib - so it literally is loading a near blank page. It's SO annoying!! Thanks for any help.

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  • Simple gradient issue with OpenGL on iphone simulator

    - by Paul
    i was following the tutorial from raywenderlich website, the gradient seems not to work perfectly, is it only because of the iphone simulator, or is it something else? I can't try myself with an iphone. Here is the image : And the code : -(CCSprite *)spriteWithColor:(ccColor4F)bgColor textureSize:(float)textureSize { // 1: Create new CCRenderTexture CCRenderTexture *rt = [CCRenderTexture renderTextureWithWidth:textureSize height:screenSize.height]; // 2: Call CCRenderTexture:begin [rt beginWithClear:bgColor.r g:bgColor.g b:bgColor.b a:bgColor.a]; // 3: Draw into the texture glDisable(GL_TEXTURE_2D); glDisableClientState(GL_TEXTURE_COORD_ARRAY); float gradientAlpha = 0.5; CGPoint vertices[4]; ccColor4F colors[4]; int nVertices = 0; vertices[nVertices] = CGPointMake(0, 0); colors[nVertices++] = (ccColor4F){0, 0, 0, 0}; vertices[nVertices] = CGPointMake(textureSize, 0); colors[nVertices++] = (ccColor4F){0, 0, 0, gradientAlpha}; vertices[nVertices] = CGPointMake(0, screenSize.height); colors[nVertices++] = (ccColor4F){0, 0, 0, 0}; vertices[nVertices] = CGPointMake(textureSize, screenSize.height); colors[nVertices++] = (ccColor4F){0, 0, 0, gradientAlpha}; glVertexPointer(2, GL_FLOAT, 0, vertices); glColorPointer(4, GL_FLOAT, 0, colors); glDrawArrays(GL_TRIANGLE_STRIP, 0, (GLsizei)nVertices); glEnableClientState(GL_TEXTURE_COORD_ARRAY); glEnable(GL_TEXTURE_2D); // 4: Call CCRenderTexture:end [rt end]; // 5: Create a new Sprite from the texture return [CCSprite spriteWithTexture:rt.sprite.texture]; } Thanks

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  • UIScrollView image/photo viewer with paging enabled and zooming

    - by Mike Weller
    OK, I think it's time to make an official place on the internet for this problem: How to make a UIScrollView photoviewer with paging and zooming. Welcome my fellow UIScrollView hackers. I have a UIScrollView with paging enabled, and I'm displaying UIImageViews like the built-in photos app. (Does this sound familiar yet?) I found the following project on github: http://wiki.github.com/andreyvit/ScrollingMadness Which shows how to implement zooming in a scroll view while paging is enabled. If anyone else tries this out, I actually had to remove the UIScrollView subclass and use the native class otherwise it doesn't work. I think it's because of changes in the 3.0 SDK relating to how the scroll view intercepts touch events. So the the idea is to remove all the other views when you start zooming, and move the current view to (0, 0) in the scrollview, updating the contentsize etc. Then when you zoom back to 1.0f it adds the other views back and puts things all back in order. Anyway, that project works perfectly in the simulator, but on the device there is some nasty movement of the view you are resizing, which looks like it's caused by the fact we are changing the contentsize/offset etc. for the view being resized. You have to do this view moving otherwise you can pan left through the whitespace left by the other views. I found one interesting note in the "Known Issues" of the 3.0 SDK release notes: UIScrollView: After zooming, content inset is ignored and content is left in the wrong position. This kind of sounds like what is happening here. After zooming in, the view will shift offscreen because you have changed the offset etc. I've spent hours on this already and I'm slowing coming to the sad realization that this just isn't going to work. Three20's photo viewer is out of the question: it's too heavy weight and there is too much unnecessary UI and other behaviour. The built in Photo app seems to do some magic. If you zoom in on an image and pan to the far edges, the current photo moves independently of the photo next to it which isn't what you get when trying this with a standard UIScrollView. I've seen discussion about nesting the UIScrollView's but I really don't want to go there. Has anybody managed this with the standard UIScrollView (and works in the 2.2 and 3.0 SDK)? I don't fancy rolling my own zoom + bounce + pan + paging code.

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  • Where to change data for a "list" datasource in dashcode?

    - by erotsppa
    I created a new project in dashcode and it automatically generated a mobile web app for me with a list and sample datasources. I see two datasources, one is labeled as "datasource" and the other is "list". However I can see that the actual data in datasources is in a js file, everything is good but where is the actual data stored for "list"? The sample application came with a bunch of data for "list" and I am unable to change it. Any ideas?

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  • How can I debug VGA Out on an iPad?

    - by Elliot
    The Dock Connector to VGA Adapter (required for VGA out on the iPad) uses the Dock Connector, so I can't have my laptop connected at the same time. I remember reading something about a Remote debugger, but despite lots of searching, I'm unable to find it. How can I run the debugger to test VGA output of my iPad app?

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  • UIPickerVIew Multiple Component Pop-In

    - by harekam_taj
    Hello, I want to create a UIPickerView which will have 2 option to choose. The second option will be based of the first option selected. I want the UIPickerView to also popin on a button presses something similar to he calendar app to the date select. Can someone guide me to a article or where should I start? Thanks for all your help!

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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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  • Problem dismissing multiple modal view controllers

    - by Sheehan Alam
    I am having trouble getting my modal view controllers to display properly. I have a parent view controller that is the delegate for modal view A. In modal view A I am presenting modal view B, and having the delegate dimiss modal view A. When modal view B appears it seems to display but the screen dims, and the UI locks up, but the app doesn't crash. I set animation settings to NO and I am still getting the same issue.

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  • How to correctly use ABPersonViewController with ABPeoplePickerNavigationController to view Contact

    - by Maha
    I'm attempting to add a feature to my app that allows the user to select a contact from an ABPeoplePickerNavigationController, which then displays an ABPersonViewController corresponding to the contact they picked. At that point, I want the user to be able to click on a contact's phone number and have my app respond with custom behavior. I've got the ABPeoplePickerNavigationController working fine, but I'm running into a problem displaying the ABPersonViewController. I can get the ABPersonViewController to animate onto the screen just fine, but it only displays the contact's photo, name, and company name. None of the contact's other fields are displayed. I'm using the 'displayedProperties' element in the ABPersonViewController to tell the program to display phone numbers. This creates some strange behavior; when I select a contact that has no phone numbers assigned, the contact shows up with "No Phone Numbers" written in the background (as you'd expect), but when selecting a contact that does have a phone number, all I get is a blank contact page (without the "No Phone Numbers" text). Here's the method in my ABPeoplePickerNavigationController delegate class that I'm using to create my PersonViewController class, which implements the ABPersonViewController interface: - (BOOL) peoplePickerNavigationController:(ABPeoplePickerNavigationController *)peoplePicker shouldContinueAfterSelectingPerson:(ABRecordRef)person { BOOL returnState = NO; PersonViewController *personView = [[PersonViewController alloc] init]; [personView displayContactInfo:person]; [peoplePicker pushViewController:personView animated:YES]; [personView release]; return returnState; } Here's my PersonViewController.h header file: #import <UIKit/UIKit.h> #import <Foundation/Foundation.h> #import <AddressBookUI/AddressBookUI.h> @interface PersonViewController : UIViewController <ABPersonViewControllerDelegate> { } - (void) displayContactInfo: (ABRecordRef)person; @end Finally, here's my PersonViewController.m that's creating the ABPersonViewController to view the selected contact: #import "PersonViewController.h" @implementation PersonViewController - (void) displayContactInfo: (ABRecordRef)person { ABPersonViewController *personController = [[ABPersonViewController alloc] init]; personController.personViewDelegate = self; personController.allowsEditing = NO; personController.displayedPerson = person; personController.addressBook = ABAddressBookCreate(); personController.displayedProperties = [NSArray arrayWithObjects: [NSNumber numberWithInt:kABPersonPhoneProperty], nil]; [self setView:personController.view]; [[self navigationController] pushViewController:personController animated:YES]; [personController release]; } - (BOOL) personViewController:(ABPersonViewController*)personView shouldPerformDefaultActionForPerson:(ABRecordRef)person property:(ABPropertyID)property identifier:(ABMultiValueIdentifier)identifierForValue { return YES; } @end Does anyone have any idea as to why I'm seeing this blank Contact screen instead of one with clickable phone number fields?

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  • Any example on how to implement the new VerificationController and the KNOWN_TRANSACTIONS_KEY constant?

    - by Carles Estevadeordal
    I've been looking at implementing the new VerificationController to verify in-App-Purchases: http://developer.apple.com/library/ios/#releasenotes/StoreKit/IAP_ReceiptValidation/_index.html And I wonder if there is some example anywhere en how to validate a transaction, since it seems that the - (BOOL)verifyPurchase:(SKPaymentTransaction *)transaction; is not enough and it has to be implemented internally to verify the purchase when the data form the server is received. Another question is if anyone has a clue on what the KNOWN_TRANSACTIONS_KEY is and how to fill it, is it just the product id of the purchase?

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  • UIViewController rotate methods

    - by Corey Floyd
    What object is responsible for dipatching the UIViewController rotation method calls, i.e: – shouldAutorotateToInterfaceOrientation: – willRotateToInterfaceOrientation:duration: – willAnimateFirstHalfOfRotationToInterfaceOrientation:duration: – willAnimateSecondHalfOfRotationFromInterfaceOrientation:duration: – didRotateFromInterfaceOrientation: I imagine it is UIApplication (but maybe the AppDelegate or UIWindow). The next question, is how does the object know which UIViewController to talk to? How does it know which UIViewController has its view as the subview of the window? Is there a message you can send or a property you can set (of some object) that sets the "Active" UIViewController for the app?

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  • Dismissing a modal view in horizontal orientation?

    - by Sheehan Alam
    I have a modal view that is presented and dismissed fine when my device is in vertical orientation. I have problems when my modal view is presented in the vertical orientation, but dismissed in horizontal orientation. The entire app switches back to vertical orientation automatically. How can I ensure that if I am in horizontal orientation, the view should dismiss properly?

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  • NSSet to NSData, then back out again, for GameKit?

    - by Peter Hajas
    Hi guys, I'm trying to do some image edit syncing between two of the same app running on different iPhones. I would like to send an NSSet * from one device to another (which I imagine involves encapsulating in NSData) then decrypting this back to an NSSet, then using it in a touchesMoved type of function. Is this feasible, or should I work on syncing the UIImages instead? I worry that UIImage syncing would have too much latency for realtime interaction. Thanks for your help!

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  • how to retrieve image from sqlite3?

    - by summer
    sorry guys..i know i had been asking alot of question..but ironically few has given me solution, and so now i really need a solution to the final part of my app?how to i retrieve image from sqlite to be display in the uiimageview?with conversion... NSData *imgData = [[NSData alloc] initWithBytes:sqlite3_column_blob(selectstmt, 3) length: sqlite3_column_bytes(selectstmt, 3)]; snap2playObj.snapImage = [UIImage imageWithData:imgData]; do i do it the normal way or do i need to convert it back to some string or something?kinda no clues..need some example or solution..and i wanna display it in my detailview

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  • Detecting if music is playing?

    - by Flafla2
    Hi! My app involves music(iPodMusic), and there is a UISwitch toggling play/pause. My goal is to be able to detect if music is playing, so that therefore the play/pause switch can say 'play' when music is playing and 'pause' if it isn't.

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  • Object C casting

    - by ct2k7
    Hi, I'm trying to cast this statement: [self handError:noConnectionError]; basically, this statement is in a class, which is not the app delegate, but is the .m file of a view, specifically a view after uitableview, which contains its own uiviewtable. The warning that statement gives me is that the error produced may not be apparent to the UIView (view control container).

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  • How do I allow users to dial numbers in my tableView cells?

    - by Griffo
    Hi all, I have a table containing cells with phone numbers. How can I allow the user to dial these numbers by tapping the row? It's not working by default and there's no option in interface builder like there is for uiwebviews so I imagine I need to programmatically tell the app to dial the number when the cell is tapped.

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