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  • UIImages on UITableView?

    - by babu Kong
    what is the best method to display about 300 png images into a UITableView.. i dont wanna display them at the same time... i have 3 tableViewControllers that will each display about 100 imgaes.. (its for a catalog so the images are important to display) i used [uiimage imageNamed:] but that method caches the images and they dont get released so the memory usage is big.... is there any way to release the cache when the nav controller pushes a different view controller? i also tried [uiimage alloc] initWithContentsOfFile] but the images wont display.... any help?

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  • Core Data - NSPredicate to filter to-many relationship

    - by Macatomy
    I have 2 entities, Task and List. Each task has a to-one relationship to a List object called "list", and there is an inverse relationship with List, which has a to-many relationship with Task called "tasks". I'm trying to use a fetch request with an NSPredicate to get all the Task objects that belong to a specified List: NSPredicate *predicate = [NSPredicate predicateWithFormat:@"list=%@", theList]; [fetchRequest setPredicate:predicate]; (where "theParent" is a reference to a List object). However this returns no fetched objects. If I take out the predicate, then the objects are returned (so I do know they exist, and by NSLogging theList I know it has Task objects associated with it). Thanks

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  • How to set the content size according to the size of UINavigation bar

    - by Deepika
    Hi all I am resizing the navigation bar when my application switches into landscape orientation. But i am not able to set the content size of navigation bar according to its height. Landscape image :- In this image the top left bar item and title of navigation bar are not resizing when it switches into landscape orientation....they should get re sized according to height of navigation bar. Please suggest me any idea for it? Thanks Deepika

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  • Is it possible to have AVFramework and AudioToolbox framework in one app?

    - by Satyam
    I'm trying to write develop audio related application. In that, I'm using AudioToolBox framework for recording the sound. And I'm using AVFramework to play soudns. When app is stared, it will play some mp3 file using AVFramework. And also initializes Audiotoolbox. In simulator, I'm able to record and play. But when I'm testing it on iPhone, I'm getting following error for initializing AudioToolBox. 2009-12-11 22:25:51.599 StoryBook[807:207] AudioRecorder init AudioSessionInitialize failed with error: 1768843636 Can some one tell me whether we can use both AV as well as Audio Toolbox frame works in one application? Why I'm getting that error?

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  • How can I pop a view from a UINavigationController and replace it with another in one operation?

    - by Matt Brandt
    I have an application where I need to remove one view from the stack of a UINavigationController and replace it with another. The situation is that the first view creates an editable item and then replaces itself with an editor for the item. When I do the obvious solution within the first view: MyEditViewController *mevc = [[MYEditViewController alloc] initWithGizmo: gizmo]; [self retain]; [self.navigationController popViewControllerAnimated: NO]; [self.navigationController pushViewController: mevc animated: YES]; [self release]; I get very strange behavior. Usually the editor view will appear, but if I try to use the back button on the nav bar I get extra screens, some blank, and some just screwed up. The title becomes random too. It is like the nav stack is completely hosed. What would be a better approach to this problem? Thanks, Matt

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  • iPhone: NSAlert Delegate Method Never Called

    - by Marco
    Hello, I have implemented an NSAlert but the delegate method didDissmissWithButton is never called. This code evokes the NSAlert: NSString *title = [NSString stringWithFormat:@"Keine Internetverbindung"]; NSString *alertMessage = [NSString stringWithFormat:@"Es konnte keine Verbindung zu www.sip.de aufgebaut werden!"]; NSString *ok = [NSString stringWithFormat:@"Ok"]; UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:alertMessage delegate:self cancelButtonTitle:ok otherButtonTitles:nil]; [alert show]; [alert release]; and this is the NSAlert delegate method: - (void)alertView:(UIAlertView *)alertView didDisMissWithButtonIndex:(NSInteger)buttonIndex{ exit(3); } The method is never called, what is my mistake?

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  • UITableView, force to snap to whole UITableViewCell at top of table

    - by Adam Eberbach
    I have a need to make a UITableView only display whole cells at the top of the cell, so when the table is moved or scrolled it should animate to make a whole cell visible at the top of the table if it has happened to stop with a cell partially off the top. This can be easily done using visibleCells and scrollToRowAtIndexPath methods of UITableView, BUT the cell should not always scroll down to move the partial cell into view - if the cell at top is more than 50% gone it should go completely with the next cell (i.e. index 1 in the array returned by visibleCells) moving to the top of the table. I've tried a few things to make this happen but I don't think I am understanding the way frame and bounds work between a UITableView and its UITableViewCells. Any help?

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  • Declaring CustomViewController?

    - by fuzzygoat
    I have noticed in some of my older apps that in situations where I have added a custom View Controller I have not changed the View Controller class in the application delegate. For example, below I have created a CustomViewController class but have declared viewController as UIViewController. @interface ApplicationAppDelegate: NSObject <UIApplicationDelegate> { UIWindow *window; UIViewController *viewController; } My question is, both work, but for correctness should I be writing this as follows: @class CustomViewController; @interface ApplicationAppDelegate: NSObject <UIApplicationDelegate> { UIWindow *window; CustomViewController *viewController; } gary

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  • how to stop animation after using beginAnimations?

    - by www.ruu.cc
    i use the following code to do a string rolling, but how to stop the animation? [UIView beginAnimations:@"ruucc" context:NULL]; [UIView setAnimationDuration:12.8f]; [UIView setAnimationCurve:UIViewAnimationCurveLinear]; [UIView setAnimationDelegate:self]; [UIView setAnimationRepeatAutoreverses:NO]; [UIView setAnimationRepeatCount:999999]; frame = label1.frame; frame.origin.x = -12; label1.frame = frame; [UIView commitAnimations];

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  • Core Data 1-to-many relationship: List all related objects as section header in UITableView

    - by Snej
    Hi: I struggle with Core Data on the iPhone about the following: I have a 1-to-many relationship in Core Data. Assume the entities are called recipe and category. A category can have many recipes. I accomplished to get all recipes listed in a UITableView with section headers named after the category. What i want to achieve is to list all categories as section header, even those which have no recipe: category1 <--- this one should be displayed too category2 recipe_x recipe_y category3 recipe_z NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Recipe" inManagedObjectContext:managedObjectContext]; [fetchRequest setEntity:entity]; [fetchRequest setFetchBatchSize:10]; NSSortDescriptor *sortDescriptor1 = [[NSSortDescriptor alloc] initWithKey:@"category.categoryName" ascending:YES]; NSSortDescriptor *sortDescriptor2 = [[NSSortDescriptor alloc] initWithKey:@"recipeName" ascending:YES]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor1,sortDescriptor2, nil]; [fetchRequest setSortDescriptors:sortDescriptors]; NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:@"category.categoryName" cacheName:@"Recipes"]; What is the most elegant way to achieve this with core data?

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  • Getting Data From Webpages?

    - by fuzzygoat
    When looking to get data from a web page whats the recommended method if the page does not provide a structured data feed? Am I right in thinking that its just a case of doing an NSURLRequest and then hacking what you need out of the responseData(NSData*)? I am not too concerned about the implementation in Xcode, I am more curious about actually collecting the data, before I start coding a "hunt & peck" through a list of data. gary

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  • How we should load the MFMailViewController in cocos2d ?

    - by srikanth rongali
    I am writing an app in using cocos2d. This method I have written for the selector goToFirstScreen: . The view is in landscape mode. I need to send an email. So, I need to launch the MFMailComposeViewController. I need it in portrait mode. But, the control is not entering in to viewDidLoad of the mailMe class. The problem is in goToScreen: method. But, I do not get where I am wrong ? -(void)goToFirstScreen:(id)sender { NSLog(@"goToFirstScreen: "); CCScene *Scene = [CCScene node]; CCLayer *Layer = [mailME node]; [Scene addChild:Layer]; [[CCDirector sharedDirector] setAnimationInterval:1.0/60]; [[CCDirector sharedDirector] pushScene: Scene]; } This is my mailMe class to launch mail controller #import <UIKit/UIKit.h> #import <MessageUI/MessageUI.h> #import <MessageUI/MFMailComposeViewController.h> #import "cocos2d.h" @interface mailME : CCLayer <MFMailComposeViewControllerDelegate> { UIViewController *mailComposer; } -(void)displayComposerSheet; -(void)launchMailAppOnDevice; @end #import "mailME.h" @implementation mailME -(void)viewDidLoad { NSLog(@"Enetrd in to mail"); Class mailClass = (NSClassFromString(@"MFMailComposeViewController")); if (mailClass != nil) { if ([mailClass canSendMail]) { [self displayComposerSheet]; } else { [self launchMailAppOnDevice]; } } else { [self launchMailAppOnDevice]; } } -(void)displayComposerSheet { CCDirector *director = [CCDirector sharedDirector]; [director pause]; [director stopAnimation]; [director.openGLView setUserInteractionEnabled:NO]; mailComposer = [[UIViewController alloc] init]; [mailComposer setView:[[CCDirector sharedDirector]openGLView]]; [mailComposer setModalTransitionStyle:UIModalTransitionStyleCoverVertical]; MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init]; picker.mailComposeDelegate = self; [picker setSubject:@"Hello!"]; NSArray *toRecipients = [NSArray arrayWithObject:@"[email protected]"]; [picker setToRecipients:toRecipients]; NSString *emailBody = @"It is not working!"; [picker setMessageBody:emailBody isHTML:YES]; [mailComposer presentModalViewController:picker animated:NO]; [picker release]; } - (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error { switch (result) { case MFMailComposeResultCancelled: break; case MFMailComposeResultSaved: break; case MFMailComposeResultSent: break; case MFMailComposeResultFailed: break; default: break; } [mailComposer dismissModalViewControllerAnimated:NO]; [[UIApplication sharedApplication] setStatusBarOrientation:CCDeviceOrientationLandscapeLeft animated:NO]; CCDirector *director = [CCDirector sharedDirector]; [director.openGLView setUserInteractionEnabled:YES]; [director startAnimation]; [director resume]; [mailComposer.view.superview removeFromSuperview]; } -(void)launchMailAppOnDevice { NSString *recipients = @"mailto:[email protected]?&subject=Hello!"; NSString *body = @"&body=It is not working"; NSString *email = [NSString stringWithFormat:@"%@%@", recipients, body]; email = [email stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; [[UIApplication sharedApplication] openURL:[NSURL URLWithString:email]]; } - (void)dealloc { [super dealloc]; } @end

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  • Missing AVFoundation.framework

    - by Alex
    Hi, AVFoundation.framework is not where the documentation says it should be. I have iPhone SDK 2.2 installed (never had previous sdk versions installed) and I can't find that folder under /System/Library/Frameworks I did find it under /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS2.2.sdk/System/Library/Frameworks/ folder but if I add it from that location, then the compiler can't find the header files. I tried copying the entire AVFoundation.framework folder to /System/Library/Framework, but it still can't find the header files. How can I use AVFoundation classes? Thanks, Alex

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  • how can load images from plist in to UITableView ?

    - by srikanth rongali
    I have stored the videos and the thumbnail images of the videos in Documents folder. And I have given the path in plist. In plist I took an array and I added directories to the array. And in the dictionary I stored the image path /Users/srikanth/Library/Application Support/iPhone Simulator/User/Applications/9E6E8B22-C946-4442-9209-75BB0E924434/Documents/image1 for key imagePath. for video /Users/srikanth/Library/Application Support/iPhone Simulator/User/Applications/9E6E8B22-C946-4442-9209-75BB0E924434/Documents/video1.mp4 for key filePath. I used following code but it is not working. I am trying only for images. I need the images to be loaded in the table in each cell. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease]; [cell setAccessoryType:UITableViewCellAccessoryDetailDisclosureButton]; UIImageView *image2 = [[UIImageView alloc]init]; image2.frame = CGRectMake(0.0f, 0.0f, 80.0f, 80.0f); image2.backgroundColor = [UIColor clearColor]; //image2.image = [UIImage imageNamed:@"snook.png"]; image2.tag = tag7; } NSDictionary *dictOfplist = [cells objectAtIndex:indexPath.row]; [(UIImageView *)[cell viewWithTag:tag7] setImage:[dictOfplist objectForKey:@"imagePath"]]; return cell; } - (void)viewDidLoad { [super viewDidLoad]; self.title = @"Library"; self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Close" style:UIBarButtonItemStyleBordered target:self action:@selector(close:)]; NSString* plistPath = [[NSBundle mainBundle] pathForResource:@"details" ofType:@"plist"]; contentArray = [NSArray arrayWithContentsOfFile:plistPath]; cells = [[NSMutableArray alloc]initWithCapacity:[contentArray count]]; for(dCount = 0; dCount < [contentArray count]; dCount++) [cells addObject:[contentArray objectAtIndex:dCount]]; } How can I make this work. Thank you.

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  • NSNumberFormatter weirdness with NSNumberFormatterPercentStyle

    - by rein
    Hi, I need to parse some text in a UITextField and turn it into a percentage. Ideally, I'd like the user to either type something like 12 or 12% into the text field and have that be parsed into a number as a percentage. Here's what's weird. The number formatter seems to not like 12 and seems to divide 12% by 10000 instead of 100: NSNumberFormatter *formatter = [[[NSNumberFormatter alloc] init] autorelease]; [formatter setNumberStyle:NSNumberFormatterPercentStyle]; NSNumber *n1 = [formatter numberFromString:@"12"]; NSNumber *n2 = [formatter numberFromString:@"12%"]; NSLog(@"n1 = %@", n1); // n1 = (null) NSLog(@"n2 = %@", n2); // n2 = 0.0012 How do I get the formatter to return 0.12 as expected? EDIT: it seems to only happen if the formatter fails first. If the formatter does not fail it returns 0.12 as expected. Strange.

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  • iPad UIColor Saturation Issues

    - by Carter Allen
    I am trying to draw a UIColor on the screen of a view-based app, and I am trying to do so using HSB. It is absolutely necessary for me to use HSB in this case. I can create a UIColor object with any S value from 0.0f to 0.75f, but past that the numerical changes have no effect on the actual saturation displayed. I need it to be 1.0f, but it is still using 0.75f. Any ideas on why it is doing that, and how I can make it work?

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  • How to load a UIView from a tap?

    - by balexandre
    Hi, I'm new to iPhone Development and I did some examples and seen code and code and more code but I still can't get the when the user taps here show this view using this animation, and go back after (user taps a back button) I did some Tab Bar examples, Utility examples, etc but when I start a project from scratch the code never does what I want :-/ every time I create a View (xib) I also create the controller (h and m files), as all examples are like this, and I have no idea if I can only create 4 Views and just have one controller :-( when a user taps a UITableCell how can I load a new view using an animation? and how can I go back to the UITableCell the user was? kind'a (in C#) myNewForm f = new myNewForm(); f.show(); ... this.Close(); If someone can share some knowledge or a tutorial or a screencast, I will greatly appreciate Thank you!

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  • how to delete contents from plist programmatically ?

    - by srikanth rongali
    I have a plist file. I want to delete the data from the plist. How can I do it programmatically ? My Plist have an array cells. cells is filled by dictionaries . Each dictionary is filled by string. I used the following way. NSString* plistPath1 = [[NSBundle mainBundle] pathForResource:@"details" ofType:@"plist"]; [cells removeObjectAtIndex:[clickedButtonPath row]]; NSMutableArray *array1 = [[NSMutableArray alloc] initWithCapacity:4]; array1 = cells; [array1 writeToFile:plistPath1 atomically: YES]; But the plist is not taking the changes. Thank you.

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  • Cocos2D, UIScrollView, and initial placement of a scene

    - by diatrevolo
    Hello: I am using a UIScrollView to forward touches to Cocos2D as outlined in http://getsetgames.com/2009/08/21/cocos2d-and-uiscrollview/ Everything works great after a few days of working with it, except one thing: when the initial view appears on the screen, the background appears to be scrolled to the center. As soon as I try to scroll around, the image jumps to 0,0, and everything works as normal, except the touches are offset by half the width and height of the background image. Am I overlooking something basic? I can't think of a useful portion of the code that illustrates the issue, as I can't track it down, but would be happy to post code if anyone has any ideas. Thanks in advance, -Roberto

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  • Why Is Bottom Half of Custom UIActionSheet with UIDatePicker Disabled?

    - by Gorgando
    Everything seems to be working great with my UIActionSheet that contains a UIDatePicker except that the bottom half of the DatePicker is disabled. Visually there is a shadow that makes the bottom half of the picker darker than the top half. Everything in the bottom half is disabled and I can't for the life of me figure out how to enable it. I also noticed in my other "normal" UIActionSheets that just contain buttons, the bottom half of the cancel buttons are disabled. This is the code for my custom UIActionSheet: self.datePickerView = [[UIDatePicker alloc] init]; self.datePickerView.datePickerMode = UIDatePickerModeDate; self.actionSheet = [[UIActionSheet alloc] initWithTitle:@"Choose a Follow-up Date" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:@"Done", nil]; [self.actionSheet showInView:self.view]; [self.actionSheet addSubview:self.datePickerView]; [self.actionSheet sendSubviewToBack:self.datePickerView]; [self.actionSheet setBounds:CGRectMake(0,0,320, 500)]; CGRect pickerRect = self.datePickerView.bounds; pickerRect.origin.y = -95; self.datePickerView.bounds = pickerRect; I've tried several things including sendSubviewToBack, BringSubviewToFront, etc but I have not had any luck. I appreciate your help!

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  • How to efficiently save changes made in UI/main thread with Core Data?

    - by Jaanus
    So, there have been several posts here about importing and saving data from an external data source into Core Data. Apple documents a reasonable pattern for this: "import and save on background thread, merge saved objects to main thread." All fine and good. I have a related but different problem: the user is modifying data in the UI and main thread, and thus modifies state of some objects in the managed object context (MOC). I would like to save these changes from time to time. What is a good way to do that? Now, you could say that I could do the same: create a background thread with its own MOC and pass the changed objectID-s there. The catch-22 for me with this is that an object's ID changes when it is saved, and I cannot guarantee the order of things happening. I may end up passing a different objectID into the background thread for the same object, based on whether the object has been previously saved or not, and I don't know if Core Data can resolve this and see that different objectID-s are pointing to the same object and not create duplicates for me. (I could test this, but I'm lazywebbing with this question first.) One thought I had: I could always do MOC saves on a background thread, and queue them up with operationqueue, so that there is always only one save in progress. I would not create a new MOC, I would just use the same MOC as in main thread. Now, this is not thread safe and when someone modifies the MOC in main thread while it is being saved in background thread, the results will probably be catastrophic. But, minus the thread safety, you can see what kind of solution I'd wish for. To be clear, the problem I need to fix is that if I just do the save in main thread, it blocks the UI for an unacceptably long period of time, I want to move the save to background thread. So, questions: what about the reasoning of an object ID changing during saving, and Core Data being able to resolve them to the same object? Would this be the right way of addressing this problem? any other good ways of doing this?

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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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  • Error Playing video from server with MPMoviePlayerController

    - by skiria
    I try to play a video on the server with this code. I have a error. //Play the video from server - (IBAction)playVideo:(id)sender; { NSLog(@"URLVIDEO %@", aVideo.urlVideo); MPMoviePlayerController *VideoPlayer = [[MPMoviePlayerController alloc]initWithContentURL:[NSURL URLWithString:aVideo.urlVideo]]; [VideoPlayer play]; } //Error on con console Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Content URL must not be nil.' aVideo.urlVideo is a NSString and it's correct when I copy the result on the NSLog on the browser.

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