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• UITextView w/ Syntax Highlighting

  - by Travis

  Is there a common library, parser, etc. for Cocoa or Cocoa-Touch that can take a chunk of text and do the proper syntax highlighting? As a simple example, I'd like to have a UITextView that has C/C++ syntax highlighting.

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• How create UIImage from bytes ?

  - by Sergey

  Hello, all! I need in UIImage created from my colors (for example, i need in image 1x1 pixel with black color). I've got array: unsigned char *color[] = {0, 0, 0, 1}; How can i create UIImage from this array ? I've try unsigned char *bytes[4] = {0,0,0,1}; NSData *data = [NSData dataWithBytes:bytes length:4]; UIImage *img = [UIImage imageWithData:data]; but this method has no result...

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• UIAlertViewDelegate method didDismissWithButtonIndex gets called while the phone is sleeping/locked.

  - by Rob

  I have a UIAlertView who's didDismissWithButtonIndex delegate method calls pops the view controller (same class, it's the alertview delegate and the viewcontroller) to return the user to the previous screen. The issue is that when you lock the phone before the [alert show]; is called, something is calling didDismissWithButtonIndex while the phone is locked. Since the response to that is to pop the view controller, which releases and deallocs it, I crash on the callback. What is causing this phantom button press? Seems like a framework bug, but I hate jumping to that conclusion. I'm definitely not hitting the button, because I hit a breakpoint in my code right before it's displayed. Then I lock the phone. Then I continue. I see it do the show, return to the event loop, and then, while the phone is still locked, hit my breakpoint in didDismissWithButtonIndex. There are a few internet/forum postings about similar spurious delegate calls, but no concrete answers. This is on the simulator, and the device, both OS 2.2 and OS 3.0. I'm assuming I'm missing something, but what? Update: Yeah, I created a simple project with just two view controllers, where when the 2nd view controller displays it creates the alert, and shows it. Then I NSLog in the delegate method, and when the phone is locked, it fires once while locked, and then again when it's unlocked and the button is clicked...2 log messages. But when not locked, there's only one. I guess I'll open an issue, but it seems awfully obvious to have survived this long without anyone complaining. :-) I'm going to try and work around it by making an isActive flag value when the willResignActive/didBecomeActive notifications arrive, and if the app isn't active skipping the delegate body. Update I went ahead in July after I posted this and created radar 7097363 for this issue. There's been no response. The workaround in practice works quite well, checking the active status when processing the delegate, and skipping the action if the the app is inactive.

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• UIBarButtonItem: target-action not working?

  - by Jacob Relkin

  Hey fellas, I've got a custom view inside of a UIBarButtonItem, set by calling -initWithCustomView. OK, so the view renders fine, but when I tap it, it doesn't call the method that I set as the UIBarButtonItem's action property. Oh, and I have verified that my -deselectAll method works fine. Here's my code: UIImageView *SOCImageView = [[ UIImageView alloc ] initWithImage:[ UIImage imageNamed: @"cancel_wide.png" ] ]; SOItem.leftBarButtonItem = [[ UIBarButtonItem alloc ] initWithCustomView: SOCImageView ]; [ SOCImageView release ]; [ SOItem.leftBarButtonItem setTarget: self ]; [ SOItem.leftBarButtonItem setAction: @selector( deselectAll ) ]; Thanks a million

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• cocos2d MFMailComposeViewController

  - by MRaguse

  hi, i tried to insert a mail tool in my app.... my app is based on the cocos2d engine the Toolbar (at the top -cancel,send...) is visible but i can't see the other parts of the mfMailComposerViewController view :-( code: -(void)displayComposerSheet { MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init]; picker.mailComposeDelegate = self; [picker setSubject:@"my message"]; // Set up recipients NSArray *toRecipients = [NSArray arrayWithObject:@"[email protected]"]; NSArray *ccRecipients = [NSArray arrayWithObjects:@"[email protected]", @"[email protected]", nil]; NSArray *bccRecipients = [NSArray arrayWithObject:@"[email protected]"]; [picker setToRecipients:toRecipients]; [picker setCcRecipients:ccRecipients]; [picker setBccRecipients:bccRecipients]; // Attach an image to the email UIImage *screenshot = [[Director sharedDirector] screenShotUIImage]; NSData *myData = UIImagePNGRepresentation(screenshot); [picker addAttachmentData:myData mimeType:@"image/png" fileName:@"AdMotiv"]; // Fill out the email body text NSString *emailBody = @"test"; [picker setMessageBody:emailBody isHTML:NO]; [[picker view] setFrame:CGRectMake(0.0f,0.0f,320.0f, 480.0f)]; [[picker view] setTransform:CGAffineTransformIdentity]; [[picker view] setBounds:CGRectMake(0.0f,0.0f,320.0f, 480.0f)]; //[[[VariableStore sharedInstance] parentView] setTransform: CGAffineTransformIdentity]; //[[[VariableStore sharedInstance] parentView] setBounds : CGRectMake(0.0f, 0.0f, 480.0f, 320.0f)]; UITextField *textfeld = [[UITextField alloc] initWithFrame:CGRectMake(50.0f, 50.0f, 100.0f, 100.0f)]; [[picker view] addSubview:textfeld]; [[[VariableStore sharedInstance] window]addSubview:picker.view]; [[[VariableStore sharedInstance] window] makeKeyAndVisible]; [picker release]; }

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• Change UIActionSheet after doing it's job

  - by mongeta

  Hello, I have to import some XML data into my app. Now I open a UIActionSheet and add as a subview a UIActivityIndicatorView. Initially I show a progress wheel and a button with 'Cancel'. When the XML has been imported, I want to hide the progress wheel (this it's easy) and change the button into a 'Done' button, all in the same UIActionSheet. What I'm doing now is closing the UIActionSheet with the option dismissWithClickedButtonIndex, but I don't like this way because it's the same as pressing 'Cancel', and then I show an UIAlertView displaying "All data has been imported". Is this possible ? thanks, regards, r.

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• Playing videos in UIWebView broken in iOS4?

  - by rforte

  I have an app that's worked since version 2.0 of the SDK where I create and add a UIWebView and then load the URL of an .mov to play a movie. Ever since the early version of the 4.0 beta up until the 4.0 GM this has stopped working. When I load a movie now I get the following error: :Plug-in handled load" and the movie never displays. Is this a known issue? Am I doing something wrong in 4.0?

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• UIWebView action sheet popup on a link - customization

  - by alided

  Hi, I'm trying to replace or add more options into the action sheet popup in uiwebview. When touching long touch on a link standard uiwebview popup shows up. I saw some apps which did it, but i can't figure it out. the standard options are : open or copy, i want to hide copy and add send email. Any help ? Thanks Albert

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• How do I keep a CALayer, sublayer of a CATiledLayer, from changing it's scale after a zoom ?

  - by David

  I have a CATiledLayer that is used to display a PDF page (this CATiledLayer is the layer type of my UIView which is a subview of a UIScrollView). I want to add overlay markers on this page. So I add a sublayer to my CATiledLayer. This sublayer again hosts the different marker's layers and acts as a grouping layer. So graphically, I have: (keep in mind that I have multiple markers which are CALayers also, this is ascii art after all) pdf page (CATiledLayer) ---------------------- | CALayer | | +---------+ | | | +----+ | | | | |mker| | | | | +----+ | | | +---------+ | | | ---------------------- I have set up the canonical drawLayer:inContext: in my view for drawing the pdf. When I zoom to have more detail, the pdf gets rendered correctly, but the markers get scaled. No matter what I do to the bounds of the CALayer, my markers always become bigger and appear jagged. I would like to have the markers always the same size, as when they were initialized and first shown when the view was drawn. Is this possible ? or am I using a wrong approach ? Should I do special drawing for my contained CALayer in the drawLAyer:inContext: message ? As you see, there are things that I am missing to resolve my problem. Thank you for any help you provide.

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• How do you hide/show UISearchBar's scope bar with animation?

  - by zekel

  I want to show no scope bar when the table is empty (before the search bar edits for the first time), no scope bar when it's editing, and finally show it when editing done. I know about the UISearchBarDelegate protocol, but I don't know how to show/hide the scope bar with animation. I know UISearchBar has setShowsScopeBar:, but no setShowsScopeBar:animated: the way it does for setShowsCancelButton:animated.

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• UITableViewController not redrawing new cell text label after popViewControllerAnimated

  - by crunchyt

  I have a problemetic UITableViewController fails to redraw an updated cell after a child view is removed. Here's what's happening. After changing data in a child view, the parent view controller reloads the source data array and runs [tableView reloadData] via a PostNotification. After this triggers, I use popViewControllerAnimated to return to the parent UITableViewController (this pops the child view off the stack, and reveals the controller one level up). However, my updated data does not appear in the parent view controller! According to the debugger, the cell's label has been updated, but the visible label does not change. However, if I scroll-flick the table, momentarily moving the updated cell out of view, when it reappears the label is updated! I also try calling [tableView reloadData] via viewWillAppear but the issue still persists. Here is some additional info that may be helpful. I have a 3 views structured like this: 1/ SettingsViewController : UITableViewController 2/ -- UserView : UITableViewController 3/ ---- UserDetailsView : UIViewController <UIActionSheetDelegate> I am calling UserDetailsView from inside UserView as follows: UserDetailsView *userDetailsView = [[UserDetailsView alloc] init]; [self.navigationController pushViewController:userDetailsView animated:YES]; If I return to the top-most controller (SettingsViewController) and then load the problematic controller (UserView), everything is drawn correctly. It is only when returning from a child view that this issue occurs. Thank you in advance for your suggestions.

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• UIPickerView with NSDictionary

  - by Dave

  I am a .NET programmer and new to Objective C. I am trying to make a UIPickerView which acts like a .NET dropdownlist. User sees the list of text and selects one and the selected value (which is the ID) is used in code. I have been browsing for almost half a day trying to figure this out. I could add a regular PickerView with list of strings, picker view with mulitple components and picker view with dependent components none of which seems to answer my query. Please help.

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• Grouped UITableView shows blank space when section is empty

  - by christo16

  Hello, I have a grouped UITableView where not all sections may be displayed at once, the table is driven by some data that not every record may have. My trouble is that the records that don't have certain sections show up as blank spaces in the table (see picture) There are no footers/headers. Anything I've missed? - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // Return the number of rows in the section. return [self getRowCount:section]; } // Customize the appearance of table view cells. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } cell.textLabel.text = [NSString stringWithFormat:@"section: %d row: %d",indexPath.section,indexPath.row]; // Configure the cell... return cell; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { float height = 0.0; if([self getRowCount:indexPath.section] != 0){ height = kDefaultRowHeight; } return height; }

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• Three20 JSON problem: Can deploy to simulator but not device (extThree20JSON)

  - by wgpubs

  Everything builds and runs in the simulator fine ... but when I attempt to run on device I get: "arm-apple-darwin10-gcc-4.2.1: ..../three20/Build/Products/Debug-iphoneos/libextThree20JSON+YAJL.a: No such file or directory" I check that directory and indeed the file doesn't exist. It does exist in the "Debug-iphoneosimulator" though (which I guess explains why it works in the simulator). So what gives and what can I do to correct this? Thanks

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• How to update the Location in CLLocationManager based on Time Interval

  - by Srilakshmi

  I have to update the newLocation in CLLocationManager Delegate depending on certain time interval

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• Stream multiple files in _one_ ASIHTTPRequest

  - by Snej

  What is best practice to stream multiple files in one ASIHTTPRequest? Right now, for one file I use: .... ASIHTTPRequest *request = [[ASIHTTPRequest alloc] initWithURL:someUrl]; [request setShouldStreamPostDataFromDisk:YES]; [request appendPostDataFromFile:someFilePath]; [request startSynchronous]; How to stream multiple files without placing all files in memory before transmission?

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• Does UILabel have a horizontal padding?

  - by mystify

  Does UILabel have a horizontal padding?

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• Design patter to keep track UITableView rows correspondance to underlying data in constant time.

  - by DenNukem

  When my model changes I want to animate changes in UITableView by inserting/deleting rows. For that I need to know the ordinal of the given row (so I can construct NSIndexPath), which I find hard to do in better-than-linear time. For example, consider that I have a list of addressbook entries which are manualy sorted by the user, i.e. there is no ordering "key" that represents the sort order. There is also a corresponding UITableView that shows one row per addressbook entry. When UITableView queries the datasource I query the NSMUtableArray populated with my entries and return required data in constant time for each row. However, if there is a change in underlying model I am getting a notification "Joe Smith, id#123 has been removed". Now I have a dilemma. A naive approach would be to scan the array, determine the index at which Joe Smith is and then ask UITableView to remove that precise row from the view, also removing it form the array. However, the scan will take linear time to finish. Now I could have an NSDictionary which allows me to find Joe Smith in constant time, but that doesn't do me a lot of good because I still need to find his ordinal index within the array in order to instruct UITableView to remove that row, which is again a linear search. I could further decide to store each object's ordinal inside the object itself to make it constant, but it will become outdated after first such update as all subsequent index values will have changed due to removal of an object. So what is the correct design pattern to accurately reflect model changes in the UITableView in costant (or at least logarithmic) time?

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• UIImagePickerController image editing not working

  - by Greg Reichow

  I am having a problem with implementing UIImagePickerController. When the controller loads, it displays modally, and allows the user to select the image. Good so far. Yet, then when it moves to the editing phase, it often displays somewhat corrupted view (the image cropping box is halfway off the top of the screen) and their is no image. It does not crash, but all UI interaction is blocked. The strange part is that this only happens when I compile with Release settings. Under debug compile settings, the image editing works fine! I have tried checking for memory warnings during this time, but none are showing up. Here is the code calling the image picker controller for reference. When I use the camera (the first method), it always works fine. It is just when selecting images from the Library (called from the second method below) does it fail as described above. And again, only on release build, and with various different types of images. - (IBAction) showCameraController:(id)sender { self.imagePicker =[[UIImagePickerController alloc] init]; self.imagePicker.sourceType=UIImagePickerControllerSourceTypeCamera; self.imagePicker.delegate=self; self.imagePicker.allowsEditing=YES; [self presentModalViewController:self.imagePicker animated:YES]; } - (IBAction) showPictureAlbumController:(id)sender { self.imagePicker =[[UIImagePickerController alloc] init]; self.imagePicker.sourceType=UIImagePickerControllerSourceTypePhotoLibrary; self.imagePicker.delegate=self; self.imagePicker.allowsEditing=YES; [self presentModalViewController:self.imagePicker animated:YES]; } The delegate methods are properly implemented, yet, during the problem I am describing, the controller is not yet calling those methods. It is failing when displaying the editing screen before the user is able to select cancel or save. It is just locking up with no crash. Please help!

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• Parsing error when using getSearchResultsForQuery of MGTwitterEngine

  - by deep8981

  Hi everyone I am doing a search using getSearchResultsForQuery method and i get searchresult too but when i try to print the parsed data i dont get text of all the tweets i am doing this [twitterEngine getSearchResultsForQuery:@"#joke" sinceID:twitterUserId startingAtPage:1 count:5]; and below is the result in console and it shows that i do get data properly but after parsing it does not parse properly.I have not done any change in parsing can anyone say why i am getting this? {"results":[{"profile_image_url":"http://a1.twimg.com/profile_images/580724970/pro_normal.jpg","created_at":"Wed, 21 Apr 2010 19:06:52 +0000","from_user":"Kousani","metadata":{"result_type":"recent"},"to_user_id":null,"text":"#ipl3 has hit hard all other General Entertainment Channels. If this continues every year, may be I will learn play cricket! :D #joke","id":12592706500,"from_user_id":13391246,"geo":null,"iso_language_code":"en","source":"<a href="http://www.tweetdeck.com" rel="nofollow">TweetDeck</a>"},{"profile_image_url":"http://a3.twimg.com/profile_images/815058343/iphone_1_059_normal.JPG","created_at":"Wed, 21 Apr 2010 19:00:59 +0000","from_user":"anamou","metadata":{"result_type":"recent"},"to_user_id":null,"text":"comedyclipsblog: Recent research has shown that six out of seven dwarves aren't happy #joke","id":12592456010,"from_user_id":7635571,"geo":null,"iso_language_code":"en","source":"<a href="http://echofon.com/" rel="nofollow">Echofon</a>"},{"profile_image_url":"http://a1.twimg.com/profile_images/636112472/Jane_New_normal.jpg","created_at":"Wed, 21 Apr 2010 18:55:49 +0000","from_user":"janeprinsep","metadata":{"result_type":"recent"},"to_user_id":20741695,"text":"@grahamtcousins DON'T DOOOOOOO ITTTTT!!!!! #joke","id":12592234721,"from_user_id":74969091,"to_user":"grahamtcousins","geo":null,"iso_language_code":"en","source":"<a href="http://www.tweetdeck.com" rel="nofollow">TweetDeck</a>"},{"profile_image_url":"http://a1.twimg.com/profile_images/779334170/sander_normal.jpg","created_at":"Wed, 21 Apr 2010 18:53:55 +0000","from_user":"SndR22","metadata":{"result_type":"recent"},"to_user_id":null,"text":"RT @MocroDeluxe: Willen jullie lachen?- kom met een #joke dan!","id":12592155790,"from_user_id":85863646,"geo":null,"iso_language_code":"nl","source":"<a href="http://ubertwitter.com" rel="nofollow">UberTwitter</a>"},{"profile_image_url":"http://a1.twimg.com/profile_images/513318990/1257454275_package_toys_normal.png","created_at":"Wed, 21 Apr 2010 18:53:33 +0000","from_user":"Fun_Jokes_Video","metadata":{"result_type":"recent"},"to_user_id":null,"text":"#joke What's Clintons new nick name?: Q. What's Clintons new nick name?\nA. Drippy Dick http://bit.ly/bZWSlJ","id":12592141067,"from_user_id":76430125,"geo":null,"iso_language_code":"en","source":"<a href="http://twitterfeed.com" rel="nofollow">twitterfeed</a>"}],"max_id":12592706500,"since_id":47543983,"refresh_url":"?since_id=12592706500&q=%23joke","next_page":"?page=2&max_id=12592706500&rpp=5&q=%23joke","results_per_page":5,"page":1,"completed_in":0.039389,"warning":"since_id removed for pagination.","query":"%23joke"} 2010-04-22 00:45:53.319 Twitter-Facebook[2090:20b] Got search results for FF1D610A-499C-41B6-B0BA-5D94989F9CF0: ( { "created_at" = 1271876812; "from_user" = Kousani; "profile_image_url" = "http://a1.twimg.com/profile_images/580724970/pro_normal.jpg"; "result_type" = recent; "source_api_request_type" = 35; }, { "created_at" = 1271876459; "from_user" = anamou; "profile_image_url" = "http://a3.twimg.com/profile_images/815058343/iphone_1_059_normal.JPG"; "result_type" = recent; "source_api_request_type" = 35; }, { "created_at" = 1271876149; "from_user" = janeprinsep; "profile_image_url" = "http://a1.twimg.com/profile_images/636112472/Jane_New_normal.jpg"; "result_type" = recent; "source_api_request_type" = 35; }, { "created_at" = 1271876035; "from_user" = SndR22; "profile_image_url" = "http://a1.twimg.com/profile_images/779334170/sander_normal.jpg"; "result_type" = recent; "source_api_request_type" = 35; }, { "created_at" = 1271876013; "from_user" = "Fun_Jokes_Video"; "profile_image_url" = "http://a1.twimg.com/profile_images/513318990/1257454275_package_toys_normal.png"; "result_type" = recent; "source_api_request_type" = 35; }, { "completed_in" = 0; "from_user_id" = 76430125; geo = ; id = 12592141067; "iso_language_code" = en; "max_id" = 12592706500; "next_page" = "?page=2&max_id=12592706500&rpp=5&q=%23joke"; page = 1; query = "%23joke"; "refresh_url" = "?since_id=12592706500&q=%23joke"; "results_per_page" = 5; "since_id" = 47543983; source = "twitterfeed"; "source_api_request_type" = 35; text = "#joke What's Clintons new nick name?: Q. What's Clintons new nick name?\nA. Drippy Dick http://bit.ly/bZWSlJ"; "to_user" = grahamtcousins; "to_user_id" = ; warning = "since_id removed for pagination."; } ) 2010-04-22 00:45:53.320 Twitter-Facebook[2090:20b] TEXT is #joke What's Clintons new nick name?: Q. What's Clintons new nick name? A. Drippy Dick http://bit.ly/bZWSlJ

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• Limit number of charchters in uitextview !

  - by hib

  Hello All , I am giving a text view to tweet some string . I am applying the following method to restrict the number of characters to 140 in length. - (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{ if([text isEqualToString:@"\b"]){ DLog(@"Ohoooo"); return YES; }else if([[textView text] length] > 140){ return NO; } return YES; } The code is working nicely except the first condition that backspace is not working. suppose that I have reached the limit of 140 characters so that the method will give me false and the user can not insert more characters but after that when I try to delete some characters the text view behave as it is disabled . So the question how do delete characters from textview.text or re-enable the text view .

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• Zoom in UIImageView without scrollView nor WebView

  - by camilo

  Hi, Is there any code example teaching how to zoom in and out in a UIImageView by user taps? I know it is possible to do it with UIScrollView and with UIWebView, but these solutions both need a lot of changes in the code, and I'm working on schedule (bad teachers). I wanted basically an example on how to manipulate directly the UIImageView. Thanks a lot!

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• How to resize image to fit UITableView cell?

  - by stefanB

  How to fit UIImage into the cell of UITableView, UITableViewCell (?). Do you addSubview to cell or is there a way to resize cell.image or the UIImage before it is assigned to cell.image ? I want to keep the cell size default (whatever it is when you init with zero rectangle) and would like to add icon like pictures to each entry. Images are slightly bigger than the cell size (table row size). I think the code looks like this (from top of my head): UIImage * image = [[UIImage alloc] imageWithName:@"bart.jpg"]; cell = ... dequeue cell in UITableView data source (UITableViewController ...) cell.text = @"bart"; cell.image = image; What do I need to do to resize the image to fit the cell size? I've seen something like: UIImageView * iview = [[UIImageView alloc] initWithImage:image]; iview.frame = CGRectMake(...); // or something similar [cell.contentView addSubview:iview] The above will add image to cell and I can calculate the size to fit it, however: I'm not sure if there is a better way, isn't it too much overhead to add UIImageView just to resize the cell.image ? Now my label (cell.text) needs to be moved as it is obscured by image, I've seen a solution where you just add the text as a label: Example: UILabel * text = [[UILable alloc] init]; text.text = @"bart"; [cell.contentView addSubview:iview]; [cell.contentView addSubview:label]; // not sure if this will position the text next to the label // edited original example had [cell addSubview:label], maybe that's the problem Could someone point me in correct direction? EDIT: Doh [cell.contentview addSubview:view] not [cell addSubview:view] maybe I'm supposed to look at this: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = ...; CGRect frame = cell.contentView.bounds; UILabel *myLabel = [[UILabel alloc] initWithFrame:frame]; myLabel.text = ...; [cell.contentView addSubview:myLabel]; [myLabel release]; }

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• Strange padding/margin when using UIWebView

  - by Nicsoft

  Hello, I am creating an app that is having a UIWebView which contains an advert. The size of the view is the same as the advert (image) itself. Still, there is a white margin/padding of some kind above and to the left of the image, inside the UIWebView. Check out the linked image: Also, I did link to the actual advert itself, you can check out the image loaded and view the source code there: Link to advert Any idea how I should remove the white padding? Thanks in advance!

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• How to use NSPredicate for Key-Path values

  - by randombits

  Using an NSPredicate for an array is rather straight forward using filteredArrayUsingPredicate:. How is this done for key-path values? Meaning, I have an array of objects (in this case, the objects are of the same type). The objects each have an instance variable called name. As per the documentation, it says to do the following: NSPredicate *predicate = [NSPredicate predicateWithFormat: @"ANY employees.firstName like 'Matthew'"]; Is that -also- used in filteredArrayUsingPredicate? What if I have an array of People objects? does that mean I would use: NSArray *allPeopleObjects; // pre-populated NSPredicate *predicate = [NSPredicate predicateWithFormat:@"ANY people.name like 'Foo'"]; NSArray *matching = [allPeopleObjects filteredArrayUsingPredicate:predicate]; Documentation is a bit lacking in that department.

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