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  • How do I code a green button in UIActionSheet?

    - by Joshua
    I am using the code: { randomstatus=0; msg=[[NSString alloc]initWithFormat:@"Good job, do you want to continue?"]; UIActionSheet *actionSheet=[[UIActionSheet alloc]initWithTitle:msg delegate:self cancelButtonTitle:@"No" destructiveButtonTitle:@"Yes" otherButtonTitles:nil]; [actionSheet showInView:self.view]; [actionSheet release]; [msg release]; } I don't want to change the code, but I need the "destructiveButton" to be green instead of red. Is this possible, or do i need to use a different button?

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  • UIRotationGestureRecognizer minimum rotation value

    - by dc
    Is it possible to set a minimum rotation value necessary for a UIRotationGestureRecognizer to transition into UIGestureRecognizerStateRecognized? I'm using multiple recognizers, and my UIRotationGestureRecognizer keeps getting called with a very small rotation (Between 1 and 15 degrees either direction) rather than my UIPinchGestureRecognizer. What I'd like to do is only have the rotation be called if the rotation is within a certain range, otherwise cancel it and let the pinch be called.

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  • CGContext rotation

    - by kasperjj
    I have a 100x100 pixel image that I want to draw at various angles rotated around the center of the image. The following code works, but rotates around the original origo of the coordinate system (upper left hand corner) and not the translated location. Thus the image is not rotated around itself but around the upper left corner of the screen. CGContextRef context = UIGraphicsGetCurrentContext(); CGContextTranslateCTM(context, -50, -50); CGContextRotateCTM (context, 0.3); CGContextTranslateCTM(context,768/2,1024/2); [image drawAtPoint:CGPointMake(0,0)]; I tried doing the same using CGAffineTransform, but got the same results.

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  • What library is used for the main menu in the facebook iOS app?

    - by Seth
    I'm making an app that has more options than will easily fit into a UITabBarController. I wanted to use something like what the facebook app has for its main menu. My guess is that it isn't proprietary to facebook, because the SCVNGR app uses something similar. This library lets you re-order the icons the way you can re-order the apps from the main menu (i.e. press and hold - icons jiggle - you can drag them around). Does anyone know what library provides this UIView? I'd like to use it if possible. Thanks!

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  • How to linebreak long string constructs ?

    - by iFloh
    I am editing SQLite SQL statements of substantial length. How can I break these into several lines to allow comfortablt editing? const char *sql = "SELECT arguments arguments arguments arguments arguments arguments arguments arguments arguments arguments FROM a, b, WHERE condition condition condition condition condition condition condition" into const char *sql = "SELECT arguments arguments arguments arguments arguments arguments arguments arguments arguments arguments FROM a, b WHERE condition condition condition" cheers

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  • How listen for UIButton state change?

    - by morticae
    I'm extending UIButton with generic functionality to change certain appearance attributes based on the displayed title. In order to do this, I need to detect and respond to changes in the "state" property. This is so I make sure the appearance is adjusted properly if the user has set different titles for different states. I assumed I would need to use some sort of KVO like the following: [self addObserver:self forKeyPath:@"state" options:NSKeyValueObservingOptionNew context:nil]; But this does not seem to fire the observeValueForKeyPath:... method for @"state" or @"currentTitle". I assume this is because UIButton does not implement the KVO pattern for those properties. I do not want to just listen for clicks. Those events cause a state change, but are not the only potential causes. Does anyone know a way to listen to and respond to state changes of a UIButton? Thanks

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  • Using CATransition in a viewController

    - by eco_bach
    Hi I'm trying to implement the ViewTransitions code sample from Apple, but putting all the logic in my viewController instead of my applicationDelegate class. I'm getting a bizarre error when I try to compile. I'm importing QuartzCore in my viewcontroller implementation as #import _kCATransitionFade", referenced from: _kCATransitionFade$non_lazy_ptr in ViewTransitionsAsViewControllerViewController.o (maybe you meant: _kCATransitionFade$non_lazy_ptr) Anyone have any ideas?

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  • How to flip the origin.y of an CGRect?

    - by mystify
    I'm trying to draw an UIImageView, but the frame's origin is wrong when I flip the coordinate system for drawing not upside-down. CGRect imgRect = imgView.frame; imgRect.origin.y += 10.0f; CGContextTranslateCTM(context, 0.0f, imgRect.size.height); CGContextScaleCTM(context, 1.0f, -1.0f); CGContextDrawImage(context, imgRect, imgView.image.CGImage); like you can see I move the image down by 10, but instead of going down by 10, it goes UP by 10. That's completely unlogical since I had actually inverted the wrong coordinate system to look exactly like the one in UIView, right? What to do about it?

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  • Adding a UIBarButtonItem to a programattically allocated UINavigationBar

    - by iamdadude
    I have a cameraoverlayview that allocates a UINavigationBar to the top of the screen like this - CGRect navbarFrame = CGRectMake(0, 0, 320, 44); navigationBar = [[UINavigationBar alloc] initWithFrame:navbarFrame]; navigationBar.delegate = self; Now I want to add a UIBarButtonItem as the left button to the navigation bar, but the standard navigationbar.leftitem doesn't work. So I tried doing this - closebutton = [[UIBarButtonItem alloc] initWithTitle:closebuttontext style:UIBarButtonItemStylePlain target:self action:@selector(close)]; navigationBar.topItem.leftBarButtonItem = closebutton; But it doesn't work either. Can anyone point me in the right direction? As far as the navigation bar loading up correctly in the cameraoverlayview, it works 100%.

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  • How to write text(using CGContextShowTextAtPoint) dynamically near graph x and y-axis intervals?

    - by Rajendra Bhole
    I developed graph using NSObject class and using CGContext method. The following code displaying dynamically in X and Y-axis intervals, CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0); CGContextSetLineWidth(ctx, 2.0); CGContextMoveToPoint(ctx, 30.0, 200.0); CGContextAddLineToPoint(ctx, 30.0, 440.0); for(float y = 400.0; y >= 200.0; y-=30) { CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0); CGContextMoveToPoint(ctx, 28, y); CGContextAddLineToPoint(ctx, 32, y); CGContextStrokePath(ctx); //CGContextClosePath(ctx); } CGContextMoveToPoint(ctx, 10, 420.0); CGContextAddLineToPoint(ctx, 320, 420.0); //CGContextAddLineToPoint(ctx, 320.0, 420.0); //CGContextStrokePath(ctx); for(float x = 60.0; x <= 260.0; x+=30) { CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0); CGContextMoveToPoint(ctx, x, 418.0); CGContextAddLineToPoint(ctx, x, 422.0); CGContextStrokePath(ctx); CGContextClosePath(ctx); } I want to write the dynamic text on the X and Y-axis lines near the intervals (like X-axis is denoting number of days per week and Y-axis denoting something per someting)? Thanks.

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  • Need to Release UIWebView Delegate?

    - by Chris
    I have a UIWebView named wView. I want to use webViewDidFinishLoad: in my class, so I am setting the class as the delegate for wView by using this line: wView.delegate = self; Everything loads properly, but when I close the UIWebView, the App crashes. If I comment out the wView.delegate = self, it works and does not crash, but then I can't use webViewDidFinishLoad: - any ideas? Do I need to release something?

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  • Automatically created NSManagedObject subclasses don't use ARC

    - by Jordan
    My project is ARC enabled (the build settings have Objective-C Reference Counting set to YES). There are no file exceptions to this, it is enabled project wide. (Latest stable version of Xcode). When I create an NSManagedObject subclass via File New for a Core Data entity, the generated header uses the following in its property declarations: @property (nonatomic, retain) But 'retain' is not ARC!! Is this a bug, or is there something I'm missing or not understanding? There are no build warnings - if this is a bug though, how can I remedy it?

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  • NSUndoManager grouping problem?

    - by anonymous
    I'm working on a barebones drawing app. I'm attempting to implement undo/redo capability, so I tell the view's undoManager to save the current image before updating the display. This works perfectly (yes, I understand that redrawing/saving the entire view is not incredibly efficient, but to solve this problem before attempting to optimize the code). However, as expected, when I 'undo' or 'redo', only the minute change is reflected. My goal is to have the whole finger stroke undone/redone. To do that, I told the undoManager to [beginUndoGrouping] in the [touchesBegan] method, and to [endUndoGrouping] in [touchesEnded]. That works for a bit, but after drawing a few strokes, the app crashes, and gdb exits with exc_bad_access. I'm very grateful for any insight you can give me. - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { mouseDragged = YES; currentPoint = [[touches anyObject] locationInView:self]; UIGraphicsBeginImageContext(drawingImageView.bounds.size); [drawingImageView.image drawInRect:drawingImageView.bounds]; CGContextRef ctx = UIGraphicsGetCurrentContext(); CGContextSetLineCap(ctx, kCGLineCapRound); CGContextSetLineWidth(ctx, drawingWidth); [drawingColor setStroke]; CGContextBeginPath(ctx); CGContextMoveToPoint(ctx, previousPoint.x, previousPoint.y); CGContextAddLineToPoint(ctx, currentPoint.x, currentPoint.y); CGContextStrokePath(ctx); [self.undoManager registerUndoWithTarget:drawingImageView selector:@selector(setImage:) object:drawingImageView.image]; drawingImageView.image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); previousPoint = currentPoint; }

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  • Are Subversion 1.6 & Xcode 3.2 compatible?

    - by Meltemi
    Trying to get Xcode to work with Subversion server. Server: Subversion upgraded to 1.6.9 (Mac OS X Leopard 10.5.8) Client: Xcode 3.2.1 (Snow Leopard 10.6.2 with Subversion 1.6.5 though not sure that matters) Repository on server is setup and working fine via command line. However, I get an error when trying to create the Repository connection in Xcode: Error: 160043 (Unsupported FS format) Description: Expected FS format '2'; found format '4' a Google search seems to say that the server needs to be updated...but it's running 1.6.9 which is the most current version I'm aware of. Anyone know how to make this work? Is it even possible? I'm well aware of the command line usage but I would like to get Xcode & SVN talking... Revisiting this after some time: Using command line: username$ svn+ssh://hostname/Library/Subversion/Repository/test yields the same result: Description: Expected FS format '2'; found format Can anyone verify that I need to upgrade Subversion on the client machine to match version on server (1.6.9)?!? was hoping i wouldn't have to unless it was a "major" revision (ie. 1.5.x - 1.6.x)

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  • Converting NSMutableData to NSString Problem

    - by Sheehan Alam
    initWithData does not convert my data object into a string properly. When I check the length of the data object, it has a value. NSMutableData* receivedData =[[NSMutableData data] retain]; NSString* json_string = [[NSString alloc] initWithData:receivedData encoding:NSUTF8StringEncoding]; Am I doing something wrong creating the string?

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  • Objective-C NSMutableDictionary Disappearing

    - by blackmage
    I am having this problem with the NSMutableDictionary where the values are not coming up. Snippets from my code look like this: //Data into the Hash and then into an array yellowPages = [[NSMutableArray alloc] init]; NSMutableDictionary *address1=[[NSMutableDictionary alloc] init]; [address1 setObject:@"213 Pheasant CT" forKey: @"Street"]; [address1 setObject:@"NC" forKey: @"State"]; [address1 setObject:@"Wilmington" forKey: @"City"]; [address1 setObject:@"28403" forKey: @"Zip"]; [address1 setObject:@"Residential" forKey: @"Type"]; [yellowPages addObject:address1]; NSMutableDictionary *address2=[[NSMutableDictionary alloc] init]; [address1 setObject:@"812 Pheasant CT" forKey: @"Street"]; [address1 setObject:@"NC" forKey: @"State"]; [address1 setObject:@"Wilmington" forKey: @"City"]; [address1 setObject:@"28403" forKey: @"Zip"]; [address1 setObject:@"Residential" forKey: @"Type"]; [yellowPages addObject:address2]; //Iterate through array pulling the hash and insert into Location Object for(int i=0; i<locationCount; i++){ NSMutableDictionary *anAddress=[theAddresses getYellowPageAddressByIndex:i]; //Set Data Members Location *addressLocation=[[Location alloc] init]; addressLocation.Street=[anAddress objectForKey:@"Street"]; locations[i]=addressLocation; NSLog(addressLocation.Street); } So the problem is only the second address is printed, the 813 and I can't figure out why. Can anyone offer any help?

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  • Problem in cropping the UIImage using CGContext?

    - by Rajendra Bhole
    Hi, I developing the simple UIApplication in which i want to crop the UIImage (in .jpg format) with help of CGContext. The developed code till now as follows, CGImageRef graphicOriginalImage = [originalImage.image CGImage]; UIGraphicsBeginImageContext(originalImage.image.size); CGContextRef ctx = UIGraphicsGetCurrentContext(); CGBitmapContextCreateImage(graphicOriginalImage); CGFloat fltW = originalImage.image.size.width; CGFloat fltH = originalImage.image.size.height; CGFloat X = round(fltW/4); CGFloat Y =round(fltH/4); CGFloat width = round(X + (fltW/2)); CGFloat height = round(Y + (fltH/2)); CGContextTranslateCTM(ctx, 0, image.size.height); CGContextScaleCTM(ctx, 1.0, -1.0); CGRect rect = CGRectMake(X,Y ,width ,height); CGContextDrawImage(ctx, rect, graphicOriginalImage); croppedImage = UIGraphicsGetImageFromCurrentImageContext(); return croppedImage; } The above code is worked fine but it can't crop image. The original image memory and cropped image memory i will got same(equal to original image memory). The above code is right for cropping the image?????????????????? How i cropping the image (in behind pixels should also be crop) from the center of the image???????????? I already wasting a lot of time for developing the above code , but i didn't get answer or way to find out how to crop the image.Thanks for sending me answer in advanced.

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  • Objective C selector memory managment (does this leak memory)?

    - by James Jones
    - (IBAction) someButtonCall { if(!someCondition) { someButtonCallBack = @selector(someButtonCall); [self presentModalViewController:someController animated:YES]; } else ... } //Called from someController - (void) someControllerFinished:(BOOL) ok { [self dismissModalViewControllerAnimated:YES]; if(ok) [self performSelector:someButtonCallBack]; else ... } I'm wondering if the user keeps getting into the !someCondition clause if the selector is leaked by assigning a new selector each time (the code above is hypothetical and not what i'm doing). Any help is appreciated. Thanks, James Jones

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  • Editable table view cell

    - by Koning Baard XIV
    I am creating an application. I have to implement a bookmark feature, and adding one should be similar to this: I want editable UITableViewCells for text input. I was wondering if there is an easier way then embedding a UITextField into a UITableViewCell. And if not, can someone explain how I can use the UITextField inside it? Thanks

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  • UILabel not updating

    - by iFloh
    Sorry the basic question, but this bugs me for a while now. I create a details view from a UITable and try to dynamically set its labels, but they are not updating: - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { myObject *tmpObj = [[myObject objectAtIndex:indexPath.section] objectAtIndex:indexPath.row]; myViewController *tmpVC = [[myViewController alloc] initWithNibName:@"NIBfile" bundle:nil]; [tmpVC.myLabel setText:tmpObj.myTitle]; // The debugger shows the text: myTitle = "myText" NSLog(@"%@", tmpVC.myLabel); // NSLog SHOWS NULL [self.navigationController pushViewController:tmpVC animated:YES]; [tmpObj release]; } any ideas why the value is not coming through?

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  • TTNavigator three20 openURLAction

    - by disp
    I'm new to three20 and trying to find my way through the TTNavigator class. I try to push to a new view via the URL system. So I used openURL: animated: method which works just fine, but it's deprecated, and I know that I should use openURLAction instead, but this has no animated: parameter. Am I missing something?

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