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  • UIAlertViewDelegate clickedButtonAtIndex: usefulness?

    - by Ed Marty
    The UIAlertViewDelegate protocol defines two methods, alertView:clickedButtonAtIndex: and alertView:didDismissWithButtonIndex:, which seem to me to be identical in usefulness. Why is there a clickedButtonAtIndex and a didDismissButtonWithIndex when they both do the same thing? I realize there is also a willDismissButtonWithIndex that happens before the alert view is dismissed, but is there any reason to use clickedButtonAtIndex instead of didDismissButtonWithIndex?

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  • iPhone filesystem POSIX-compliant?

    - by Seva Alekseyev
    Hi all, I'm trying to pass some files from one app to another. I communicate the path (via a custom URL). The target application cannot read the file, citing errno 13 (permission denied). I've checked the permissions on file - they're 0644 (O+R), the permissions on directories all the way up to the root are 755 (O+RX). From a POSIX perspective, the file should be readable to any process and any user. Yet it's not. Any ideas, please? I can think of some workarounds. I could use a Web service (upload, get a cookie, communicate the cookie to the other app, other app downloads). I could also pass the actual file data in the URL - unelegant, and probably subject to length limitations. Clipboard is not supported on iPhone OS 2 IIRC.

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  • iPhone: Use a view as a transparent overlay with closing button

    - by axooh
    I've got a map with three bar buttons for different markers to show up in the map. If I click on a bar button, the specific markers are shown in the map, which already works great. Now I would like to show a transparent overlay (popup window) with the description of the markers after I clicked on a bar button with a button to close the overlay again and show the markers (which are set in the background). The function of the bar button: - (IBAction)routeTwo:(id)sender { // The code for the overlay // ... // remove any annotations that exist [map removeAnnotations:map.annotations]; // Add any annotations which belongs to route 2 [map addAnnotation:[self.mapAnnotations objectAtIndex:2]]; [map addAnnotation:[self.mapAnnotations objectAtIndex:3]]; [map addAnnotation:[self.mapAnnotations objectAtIndex:4]]; [map addAnnotation:[self.mapAnnotations objectAtIndex:5]]; } I tried the following possibilities: 1. Using a modal view controller RouteDescriptionViewController *routeDescriptionView = [[RouteDescriptionViewController alloc] init]; [self presentModalViewController:routeDescriptionView animated:YES]; [routeDescriptionView release]; Works great, but the problem is: The map view in the background is not visible anymore (configuring alpha values of the modal view doesn't change anything). 2. Add RouteDescriptionView as a subview RouteDescriptionViewController *routeDescriptionView = [[RouteDescriptionViewController alloc] init]; [self.view addSubview:routeDescriptionView.view]; [routeDescriptionView release]; Works great as well, but the problem here is: I can't configure a close button on the subview to close/remove the subview (RouteDescriptionView). 3. Using UIAlertView Would work as expected, but the UIAlert is not really customizable and therefore not suitable for my needs. Any ideas how to achieve this?

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  • How to change font size in a pickerview?

    - by user183804
    I'm fairly new to iPhone programming and am trying to implement a double-component PickerView. At this point the picker works fine in terms of taking user input, created with Interface Builder. However, I need to change the font size to accommodate the text length in each column. I very much would appreciate any link to a straightforward method to creating a multi-component picker with an adjustable font size. Seems like it is not possible if Interface Builder is used to create the picker. So far I have not found any code links that address this issue in detail. Thanks in advance.

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  • hiding network activity indicator

    - by iSharreth
    - (void)viewWillAppear:(BOOL)animated { app = [UIApplication sharedApplication]; app.networkActivityIndicatorVisible = YES; NSURL *url = [NSURL URLWithString:@"http://www.google.com"]; NSURLRequest *request = [NSURLRequest requestWithURL:url]; [webView loadRequest:request]; } -(void)webViewDidFinishLoad { app.networkActivityIndicatorVisible = NO; } I want to hide the network activity indicator after webpage is loaded. I had written the above code. But the indicator is not hiding after the webpage is fully loaded. Anyone please help.

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  • Alpha animation bug on button

    - by RaiderJ
    I have animations that fade in a Button (alpha from 0 to 1) and fade out a button (alpha from 1 to 0). This part is all working fine. Button A triggers the fade in of Button B. Button B triggers the fade out of itself. Button B totally covers up Button A. The idea is that Button B contains an image that is used like an information popup. Button A is touched and Button B fades in on top. When Button B is touched it fades itself out again. Initially, Button B's visibility is set INVISIBLE and when the fade in animation is complete, it is set to VISIBLE. When Button B is clicked it fades out and then I set the visibility to INVISIBLE. The problem is that after Button B has faded out, and it is set INVISIBLE, it is still clickable and even though it is not visible, and touches are not received by Button A. I have tried removing Button B from the parent and re-adding it after the animation is completed, and this allows for touches to reach Button A, but only once. After that button B is not longer touchable.

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  • iphone device orientation

    - by Chandan Shetty SP
    During inAppPurchase, the storeKit will ask the username and password even though i set... [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight]; It ask Username and password in Portrait Mode... In general How to solve this kind of issue. Thanks in advance,

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  • Get Object ID of UI element from code.

    - by andoriyu.mp
    I'm trying link 40 buttons to one event handler method and then do the processing work from one method instead of 40. I know how to link it but once I get there I don't know how to distinguish what button was pressed. Does anyone know how to reference the button object sender id or is there another way to solve this problem? Any help would be greatly appreciated.

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  • Is there an easy way to make a horizontally paged UIScrollView wrap around?

    - by rustyshelf
    I notice that in the stocks application, the small graph wraps around, eg: when you get to the end of the scroll view and swipe right again, you go back to the beginning. Before I go ahead and code this myself is there an easy way to do this in the SDK? I can't find any properties or methods that would enable that? I have a paged UIScrollView that scrolls horizontally, pretty much exactly like the stocks application one does.

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  • What class should manage/control the CALayers in my view using proper MVC?

    - by wanderlust
    I have a ViewController with a view (UIView). I need to handle touches, run some logic, check against model data, and and add and remove sublayers to the view based on those touches. Then I need to update the model based on the results. Should I have: ViewController - manage touches, get/set model data, add/remove sublayers UIView CALayer Sublayers or Controller (NSObject) - get/set data ViewController - manage touches, add/remove sublayers UIView CALayer Sublayers or Controller (NSObject) - get/set data CustomView - manage touches, add/remove sublayers CALayer Sublayers Or is it something else all together? No matter what I try, it "feels" awkward. SVN is my friend. Can you guys help a girl (with architectural issues) out?

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  • Which audio playback technology do I need for this?

    - by mystify
    I have trouble choosing the right audio playback technology. There's a ton of technologies to use on the iPhone, it's so confusing. What I need to do is this: start playing short sounds ranging between 0.1 and 2 seconds high quality playback, no crackle (I heard some of the iPhone audio playback technologies do a crackle sound on start or end, which is bad!) ability to start playback of a sound, while there's already another one playing right now (two, three or more sounds at the same time) What would you suggest here, and why? Thanks :-)

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  • Overriding properties of child view controller vs setting them via parent view controller

    - by robinjam
    If you want to modify the default behaviour of a View Controller by changing the value of one of its properties, is it considered better form to instantiate the class and set its property directly, or subclass it and override the property? With the former it would become the parent View Controller's responsibility to configure its children, whereas with the latter the children would effectively configure themselves. EDIT: Some more information: The class I am referring to is FetchedTableViewController, a subclass of UITableViewController that I made to display the results of a Core Data fetch operation. There are two places I want to display the results of a fetch, and they each have different fetch requests. I'm trying to decide whether it's better to create a subclass for each one, and override the fetchRequest property, or make it the responsibility of the parent controller to set the fetchRequest property for its children.

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  • @synthesize with UITabBarController?

    - by fuzzygoat
    I am curious if there is a good reason I should / should not be using @synthesize for the tabBarController below, or does it not matter? @implementation ScramAppDelegate @synthesize window; @synthesize tabBarController; -(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { [self setTabBarController:[[UITabBarController alloc] init]]; [window addSubview:[tabBarController view]]; [window makeKeyAndVisible]; return YES; } -(void)dealloc { [tabBarController release]; [self setTabBarController: nil]; [window release]; [super dealloc]; } OR @implementation ScramAppDelegate @synthesize window; -(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { tabBarController = [[UITabBarController alloc] init]; [window addSubview:[tabBarController view]]; [window makeKeyAndVisible]; return YES; } -(void)dealloc { [tabBarController release]; [window release]; [super dealloc]; } cheers Gary

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  • How to create a controllable flip effect (flip as far (and fast) as you drag) of an UIView

    - by allisone
    I have a card (a flashcard you could say) What I can do: On fingersweeping over the flashcard the card gets turned. It's happening by detecting touchesBegan and touchesMoved and then I do stuff like [UIView beginAnimations:@"View Flip" context:nil]; [UIView setAnimationDuration:0.5]; [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut]; if (left) { [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromLeft forView:self.flashCardView cache:YES]; }else{ [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromRight forView:self.flashCardView cache:YES]; } What I can't do (but want to): I want to somehow drag the flip. Imagine this, you have a flashcard and you think you know the answer, you start flipping the card around because you want to see if you are correct, but then... no stop... you hesitate, turn back the card to the way it was, rethink, get the real answer and then finally flip to see that you were right to hesitate. Now I only have: once you start flipping, you can't stop it.

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  • How to get title of UITabBarItem in the More section?

    - by Sheehan Alam
    I have a UITabBarControllerDelegate method that determines the title of the UITabBarItem and does something accordingly. This works well for items in my UITabBar but when I click on the More button the rest of my UITabBarItems are in a UITableView. How can I determine the title in the More section? - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { if ([self.tabBarController.selectedViewController.title isEqualToString:@"All"]) { //do something } }

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  • pushScene and popScene or replaceScene . which should we use and when ?

    - by srikanth rongali
    I am using push scene to get the next scene. But, I read that for each PushScene the scene is stored in stack. The memory usage is more. So, I am using the replaceScene in place of pushScene. But, with replace scene I am getting the memory-bad-access message in debugger. So, I want to popScene after using it, so that the retain count is zero. But, I am confused in using popScene. If I have a Scene1 and Scene2. I used the following to go in to Scene2. Now I need to remove Scene1 from stack. [[CCDirector sharedDirector] pushScene:Scene2]; Where should I write the popScene to popScene1. How to get the previous scene in current running scene ? Thank you/

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  • Multiple labels in Navigation bar

    - by cmos
    I would like to create a view similar to the "Now Playing" page on the iPhone and have 3 lines of text in the Navigation bar. The only way I could find to do this was: UINavigationBar *bar = [self.navigationController navigationBar]; label = [[UILabel alloc] initWithFrame:CGRectMake(60, 2, 200, 14)]; label.tag = SONG_TAG; label.backgroundColor = [UIColor clearColor]; label.font = [UIFont boldSystemFontOfSize:14]; label.adjustsFontSizeToFitWidth = NO; label.textAlignment = UITextAlignmentCenter; label.textColor = [UIColor whiteColor]; label.highlightedTextColor = [UIColor blackColor]; [bar addSubview:label]; [label release]; //Create album label label = [[UILabel alloc] initWithFrame:CGRectMake(60, 17, 200, 12)]; label.tag = ALBUM_TAG; label.backgroundColor = [UIColor clearColor]; label.font = [UIFont systemFontOfSize:12]; label.adjustsFontSizeToFitWidth = NO; label.textAlignment = UITextAlignmentCenter; label.highlightedTextColor = [UIColor blackColor]; label.textColor = HEXCOLOR(0xA5A5A5ff); [bar addSubview:label]; [label release]; //Create artist label label = [[UILabel alloc] initWithFrame:CGRectMake(60, 30, 200, 12)]; label.tag = ARTIST_TAG; label.backgroundColor = [UIColor clearColor]; label.font = [UIFont systemFontOfSize:12]; label.adjustsFontSizeToFitWidth = NO; label.textAlignment = UITextAlignmentCenter; label.highlightedTextColor = [UIColor blackColor]; label.textColor = HEXCOLOR(0xA5A5A5ff); [bar addSubview:label]; [label release]; The problem with this is I have to remove them when the view changes. So, in -viewWillDisappear I have: UILabel *label; label = (UILabel *)[self.navigationController.navigationBar viewWithTag:SONG_TAG]; [label removeFromSuperview]; label = (UILabel *)[self.navigationController.navigationBar viewWithTag:ALBUM_TAG]; [label removeFromSuperview]; label = (UILabel *)[self.navigationController.navigationBar viewWithTag:ARTIST_TAG]; [label removeFromSuperview]; I think the way to do this is make a custom view that has the 3 labels in it, and add this to the title view. (here's the catch - you can only add 1 label or view to the title view spot on the nav bar) self.navigationItem.titleView = newViewIMadeWithThreeLabels

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  • How to save objects using Multi-Threading in Core Data?

    - by Konstantin
    I'm getting some data from the web service and saving it in the core data. This workflow looks like this: get xml feed go over every item in that feed, create a new ManagedObject for every feed item download some big binary data for every item and save it into ManagedObject call [managedObjectContext save:] Now, the problem is of course the performance - everything runs on the main thread. I'd like to re-factor as much as possible to another thread, but I'm not sure where I should start. Is it OK to put everything (1-4) to the separate thread?

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  • [iphone] UIControlEventTouchDragEnter doesn't seem to work for catching a tap that slides into a con

    - by mahboudz
    I wanted to allow for a method to get called, if a finger was dragged from outside into the bounds of a control. I thought UIControlEventTouchDragEnter would do it, but it doesn't seem to. Does anyone know if there is a way to trigger an action based on a tap sliding into a control? This is what I was trying, but got no calls to my -fingerSlidIn: [aButton addTarget:self action:@selector(fingerSlidIn:withEvent: ) forControlEvents: UIControlEventTouchDragEnter]; Thanks!

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  • Left with extra UITableViewCell after re-ordering

    - by Mark F
    After going into Edit mode, moving a cell, and leaving edit mode, i am left with one extra cell sitting on top of its duplicate cell while still in edit mode. The problem has to be somewhere in here: - (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath { NSMutableArray *array = [[fetchedResultsController fetchedObjects] mutableCopy]; id objectToMove = [[array objectAtIndex:sourceIndexPath.row] retain]; [array removeObjectAtIndex:sourceIndexPath.row]; [array insertObject:objectToMove atIndex:destinationIndexPath.row]; [objectToMove release]; for (int i=0; i<[array count]; i++) { [(NSManagedObject *)[array objectAtIndex:i] setValue:[NSNumber numberWithInt:i] forKey:@"userOrder"]; } [array release]; } Any guidance greatly appreciated!

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  • Custom UITextField blurred text

    - by David
    When a UITextField with custom frame (200 × 54 px) loses focus, the text looks a little bit blurry. example screenshot Is this a common problem? Any workaround / solution or am I doing something wrong?

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