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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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  • Is it possible to create a custom, animated MKAnnotationView?

    - by smountcastle
    I'm trying to simulate the user location animation in MapKit (where-by the user's position is represented by a pulsating blue dot). I've created a custom subclass of MKAnnotationView and in the drawRect method I'm attempting to cycle through a set of colors. Here's a simpler implementation of what I'm doing: - (void)drawRect:(CGRect)rect { float magSquared = event.magnitude * event.magnitude; CGContextRef context = UIGraphicsGetCurrentContext(); if (idx == -1) { r[0] = 1.0; r[1] = 0.5; r[2] = 0; b[0] = 0; b[1] = 1.0; b[2] = 0.5; g[0] = 0.5; g[1] = 0; g[2] = 1.0; idx = 0; } // CGContextSetRGBFillColor(context, 1.0, 1.0 - magSquared * 0.015, 0.211, .6); CGContextSetRGBFillColor(context, r[idx], g[idx], b[idx], 0.75); CGContextFillEllipseInRect(context, rect); idx++; if (idx > 3) idx = 0; } Unfortunately this just causes the annotations to be one of the 3 different colors and doesn't cycle through them. Is there a way to force the MKAnnotations to continually redraw so that it appears to be animated?

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  • Trouble getting search results using MGTwitterEngine

    - by cannyboy
    I'm using a version of Matt Gemmell's MGTwitterEngine, and I'm trying to get some results from the getSearchResultsForQuery method. // do a search [_engine getSearchResultsForQuery:@"#quote"]; // delegate method for handling result - (void)searchResultsReceived:(NSArray *)searchResults forRequest:(NSString *)connectionIdentifier { if ([searchResults count] > 0) { NSDictionary *singleResult = [searchResults objectAtIndex:1]; NSString *text = [singleResult valueForKey:@"text"]; NSLog(@"Text at Index one: \n %@", text); } } However, I never appear to get the result. In the console, I get: Request 7E4C3097-88D6-45F1-90D2-AD8205FBAAC5 failed with error: Error Domain=HTTP Code=400 "Operation could not be completed. (HTTP error 400.)" Is there a way around this? Am I implementing the delegate method right? (Also, I had difficulty installing the YAJL stuff for the engine, and wonder if that has something to do with it)

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  • UIImage created from CGImageRef fails with UIImagePNGRepresentation

    - by Ari J.R.
    I'm using the following code to crop and create a new UIImage out of a bigger one. I've isolated the issue to be with the function CGImageCreateWithImageInRect() which seem to not set some CGImage property the way I want. :-) The problem is that a call to function UIImagePNGRepresentation() fails returning a nil. CGImageRef origRef = [stillView.image CGImage]; CGImageRef cgCrop = CGImageCreateWithImageInRect( origRef, theRect); UIImage *imgCrop = [UIImage imageWithCGImage:cgCrop]; ... NSData *data = UIImagePNGRepresentation ( imgCrop); -- libpng error: No IDATs written into file Any idea what might wrong or alternative for cropping a rect out of UIImage? Many thanks!

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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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  • UIModalTransitionStylePartialCurl not rotating

    - by Mongo
    I've got a modal view controller that is being displayed using UIModalPresentationFullScreen with the TransitionStyle set as UIModalTransitionStylePartialCurl. This works beautifully. My problem is that when the device is rotated, my view rotates (as intended), but the "curl" effect does not. Does anyone know if this is by design, or is there something else that needs to be done? Thanks.

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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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  • Is there a website to lookup barcodes?

    - by strange
    Hi I know there's a http://www.upcdatabase.com/ website that allows you to lookup barcodes. This website however does not return anything for thousands of normal household items. I have seen free apps on mobile phones that can do this and list the exact product name along with price comparison. Does anyone know of good websites (even commercial ones) that have a good/reliable database that one could use for lookups?

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  • How to Hide the UIbarbutton on navigation bar

    - by abhimanyu jindal
    hi i have created a bar button which displays Done when the editing of the text view starts. what actually i need that when i press the done button then the the editable property of textview will become false and the done button hides. i am done with the first part but how to hide the bar button? please help..

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  • Import JSON data into Google Spreadsheet

    - by Jeremy Petzold
    I am pulling data down from a webservice and it is formated as JSON. I am writing a google apps script for google spreadsheet that will populate the data form me. my problem is, I can't seem to get it to parse out. doing: var dataset = myJSONtext; Browser.msgbox(dataset.item[0].key); errors out, saying item[0] is not defined. Is there some built in way I should be doing this? Any help would be apreciated.

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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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  • - Button's positioning on UIToolBar in IB -

    - by gotye
    Hey guys, As a fervent adept of IB, I created a UIToolBar (in IB of course) and added to it a few buttons. So far so good ... but then I tried to move each of them to the right position but IB doesn't let me do it ... Each time I try to scroll them IB moves them back to the former position ! Is there a way to choose their position in IB ? If not, could you give me a piece of code for me to choose their position programatically ? (sigh :D) Thanks, Gotye.

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  • UITableView section header and section footer not updating (redraw problem)

    - by Gerd
    I have a UITableView grouped style with custom header and footer view. Inside the footer I put a UILabel and a UIButton. Clicking on the button hides or show some rows, updates the UILabel in the footer view and finally resizes footer view. Basically everything is working fine. BUT the text ion the label is not updated on the screen. It is updated in the UILabel text property, but only if I scroll the section footer out of the visible area and scroll it back, it is updated. So it's a typical redraw problem here of the UITableView. I tried every method to force update like needsLayout etc. Nothing helped. I have seen some related questions but with some different behaviour and no solution. Any help/ideas? Thanks, Gerd

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  • Can I change the size of UIActivityIndicator?

    - by wolverine
    Whatever size i give to it while allocation, it shows fixed size only. Is it possible to increase it? Code: activityIndicator = [[UIActivityIndicatorView alloc] initWithFrame: CGRectMake(142.00, 212.00, 80.0, 80.0)]; [[self view] addSubview:activityIndicator]; [activityIndicator sizeToFit]; activityIndicator.autoresizingMask = (UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin); activityIndicator.hidesWhenStopped = YES; activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyleWhiteLarge;

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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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  • 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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  • UIButtonTypeRoundedRect as an accessoryView

    - by phunehehe
    Hello, I have a table view and I want to put a label on the right of each cell, so in - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath I'm having some code like this UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; button.titleLabel.text = @"title"; cell.accessoryView = button; However, the button is not displaying at all. Anyone know why? I am sure that the declaration is correct, because if I replace the button declaration with UIButton *button = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; then the button appears, which make me think that the rounded rectangle should also appear.

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  • UIWebView not loading URL

    - by jerincbus
    I'm having trouble getting a UIWebView to load a URL that I'm sending to it. Before I get into my code I was wondering if URL has to start with "http://" or can it start with "www."? I'm using an IBAction to push a UIView on to the stack: (IBAction)goToWebView { WebViewController *webController = [[WebViewController alloc] initWithNibName:@"WebViewController" bundle:[NSBundle mainBundle]]; //set the strings webController.webTitle = [self Title]; webController.webURL = [self website]; //Push the new view on the stack [[self navigationController] pushViewController:webController animated:YES]; [webController release]; webController = nil; } Then here is my WebViewController.h file: @interface WebViewController : UIViewController { IBOutlet UIWebView *webView; NSString *webTitle; NSString *webURL; } @property (nonatomic, retain) IBOutlet UIWebView *webView; @property (nonatomic, retain) NSString *webTitle; @property (nonatomic, retain) NSString *webURL; here And my WebViewController.m file: - (void)viewDidLoad { [super viewDidLoad]; NSString *urlAddress = webURL; //Create a URL object. NSURL *url = [NSURL URLWithString:urlAddress]; //URL Requst Object NSURLRequest *requestObj = [NSURLRequest requestWithURL:url]; //Load the request in the UIWebView. [webView loadRequest:requestObj]; }

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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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  • Google Appengine and Python exceptions

    - by Jim
    In my Google Appengine application I have defined a custom exception InvalidUrlException(Exception) in the module 'gvu'. Somewhere in my code I do: try: results = gvu.article_parser.parse(source_url) except gvu.InvalidUrlException as e: self.redirect('/home?message='+str(e)) ... which works fine in the local GAE development server, but raises <type 'exceptions.SyntaxError'>: invalid syntax (translator.py, line 18) when I upload it. (line 18 is the line starting with 'except') The problem seems to come from the 'as e' part: if I remove it I don't get this exception anymore. However I would like to be able to access the raised exception. Have you ever encountered this issue? Is there an alternative syntax?

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  • UIButton doesn't listen to content mode setting?

    - by Dan Ray
    firstButton is a UIButton of type Custom. I'm programmatically putting three of them across each cell of a table, thusly: [firstButton setImage:markImage forState:UIControlStateNormal]; [firstButton setContentMode:UIViewContentModeScaleAspectFit]; [cell.contentView addSubview:firstButton]; Elsewhere, I'm telling it to clipToBounds. What I get is a crop of the center square of the image, rather than an aspect-scaled rendering of it. I've tried this lots of ways, including setting the mode property on firstButton.imageView, which also doesn't seem to work.

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  • how do we access values stored in NSMutableArray of NSMutableDictionary ?

    - by srikanth rongali
    I have stored values in NsMutableDictionaries . ThenI stored all the dictionaries in NSMutable Array. I need to access the values ? How can I do that ? -(void)viewDidLoad { [super viewDidLoad]; self.title = @"Library"; self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Close" style:UIBarButtonItemStyleBordered target:self action:@selector(close:)]; cells = [[NSMutableArray alloc] initWithObjects:@"dict1", @"dict2", @"dict3", @"dict4", @"dict5", @"dict6", nil]; dict1 = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Mon, 01 Feb #2", @"date", @"0.7", @"time", @"1.2MB", @"size", @"200*200", @"pix", nil]; dict2 = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Wed, 02 Mar #3", @"date", @"1.2", @"time", @"2.2MB", @"size", @"300*300", @"pix", nil]; dict3 = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Tue, 03 Apr #5", @"date", @"1.7", @"time", @"2.5MB", @"size", @"240*240", @"pix", nil]; dict4 = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Mon, 01 Feb #2", @"date", @"0.7", @"time", @"1.2MB", @"size", @"200*200", @"pix", nil]; dict5 = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Mon, 10 Nov #5", @"date", @"2.7", @"time", @"4.2MB", @"size", @"200*400", @"pix", nil]; dict6 = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Mon, 11 Dec #6", @"date", @"4.7", @"time", @"2.2MB", @"size", @"500*200", @"pix", nil]; //[cells addObject:dict1]; //[cells addObject:dict2]; //[cells addObject:dict3]; //[cells addObject:dict4]; //[cells addObject:dict5]; //[cells addObject:dict6]; } // Customize the number of rows in the table view. - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [cells count]; } // 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] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease]; //cell.contentView.frame = CGRectMake(0.0f, 0.0f, 320.0f, 80.0f); [cell setAccessoryType:UITableViewCellAccessoryDisclosureIndicator]; UIImageView *image1 = [[UIImageView alloc]init]; image1.frame = CGRectMake(0.0f, 0.0f, 80.0f, 80.0f); image1.tag = tag7; UILabel *dateLabel = [[UILabel alloc]init]; dateLabel.frame = CGRectMake(100.0f, 5.0f, 120.0f, 25.0f); dateLabel.font = [UIFont fontWithName:@"Georgia" size:10]; dateLabel.tag = tag1; UILabel *timeLabel = [[UILabel alloc] init]; timeLabel.frame = CGRectMake(100.0f, 30.0f, 40.0f, 25.0f); timeLabel.font = [UIFont fontWithName:@"Georgia" size:10]; timeLabel.tag = tag2; UILabel *sizeLabel = [[UILabel alloc] init]; sizeLabel.frame = CGRectMake(160.0f, 30.0f, 40.0f, 25.0f); sizeLabel.font = [UIFont fontWithName:@"Georgia" size:10]; sizeLabel.tag = tag3; UILabel *pixLabel = [[UILabel alloc] init]; pixLabel.frame = CGRectMake(220.0f, 30.0f, 40.0f, 25.0f); pixLabel.font = [UIFont fontWithName:@"Georgia" size:10]; pixLabel.tag = tag4; UILabel *shareLabel = [[UILabel alloc] init]; shareLabel.frame = CGRectMake(100.0f, 55.0f, 100.0f, 25.0f); shareLabel.font = [UIFont fontWithName:@"Georgia" size:10]; shareLabel.tag = tag5; UILabel *deleteLabel = [[UILabel alloc] init]; deleteLabel.frame = CGRectMake(220.0f, 55.0f, 100.0f, 25.0f); deleteLabel.font = [UIFont fontWithName:@"Georgia" size:10]; deleteLabel.tag = tag6; [cell.contentView addSubview:dateLabel]; [cell.contentView addSubview:timeLabel]; [cell.contentView addSubview:sizeLabel]; [cell.contentView addSubview:pixLabel]; [cell.contentView addSubview:shareLabel]; [cell.contentView addSubview:deleteLabel]; [cell.contentView addSubview:image1]; [dateLabel release]; [timeLabel release]; [sizeLabel release]; [pixLabel release]; [shareLabel release]; [deleteLabel release]; [image1 release]; } // Set up the cell... [(UILabel *)[cell viewWithTag:tag1] setText:[cells objectAtIndex:[dict1 objectForKey: @"date"]]]; [(UILabel *)[cell viewWithTag:tag2] setText:[cells objectAtIndex:[dict1 objectForKey: @"time"]]]; [(UILabel *)[cell viewWithTag:tag3] setText:[cells objectAtIndex:[dict1 objectForKey: @"size"]]]; [(UILabel *)[cell viewWithTag:tag4] setText:[cells objectAtIndex:[dict1 objectForKey: @"pix"]]]; [(UILabel *)[cell viewWithTag:tag5] setText:@"Share"]; [(UILabel *)[cell viewWithTag:tag6] setText:@"Delete"]; cell.imageView.image = [UIImage imageNamed:@"image2.png"]; return cell; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return 80.0f; } I did in above way but it is not working. I know the mistake is at the accessing values. but, I could not get how to do it ? Thank You.

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