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  • CGContextFillEllipseInRect: invalid context

    - by hakewake
    Hi all, when I launch my app, I keep getting this CGContextFillEllipseInRect: invalid context error. My app is simply to make the circle 'pinchable'. The debugger shows me this: [Session started at 2010-05-23 18:21:25 +0800.] 2010-05-23 18:21:27.140 Erase[8045:207] I'm being redrawn. Sun May 23 18:21:27 Sidwyn-Kohs-MacBook-Pro.local Erase[8045] <Error>: CGContextFillEllipseInRect: invalid context 2010-05-23 18:21:27.144 Erase[8045:207] New value of counter is 1 2010-05-23 18:21:27.144 Erase[8045:207] I'm being redrawn. Sun May 23 18:21:27 Sidwyn-Kohs-MacBook-Pro.local Erase[8045] <Error>: CGContextFillEllipseInRect: invalid context 2010-05-23 18:21:27.144 Erase[8045:207] New value of counter is 2 2010-05-23 18:21:27.144 Erase[8045:207] I'm being redrawn. Sun May 23 18:21:27 Sidwyn-Kohs-MacBook-Pro.local Erase[8045] <Error>: CGContextFillEllipseInRect: invalid context 2010-05-23 18:21:27.144 Erase[8045:207] New value of counter is 3 2010-05-23 18:21:27.145 Erase[8045:207] I'm being redrawn. Sun May 23 18:21:27 Sidwyn-Kohs-MacBook-Pro.local Erase[8045] <Error>: CGContextFillEllipseInRect: invalid context 2010-05-23 18:21:27.145 Erase[8045:207] New value of counter is 4 2010-05-23 18:21:27.148 Erase[8045:207] I'm being redrawn. Sun May 23 18:21:27 Sidwyn-Kohs-MacBook-Pro.local Erase[8045] <Error>: CGContextFillEllipseInRect: invalid context 2010-05-23 18:21:27.149 Erase[8045:207] New value of counter is 5 2010-05-23 18:21:27.150 Erase[8045:207] I'm being redrawn. Sun May 23 18:21:27 Sidwyn-Kohs-MacBook-Pro.local Erase[8045] <Error>: CGContextFillEllipseInRect: invalid context 2010-05-23 18:21:27.150 Erase[8045:207] New value of counter is 6 My implementation file is: // // ImageView.m // Erase // #import "ImageView.h" #import "EraseViewController.h" @implementation ImageView -(void)setNewRect:(CGRect)anotherRect{ newRect = anotherRect; } - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { newRect = CGRectMake(0,0,0,0); ref = UIGraphicsGetCurrentContext(); } return self; } - (void)drawRect:(CGRect)rect { static int counter = 0; CGRect veryNewRect = CGRectMake(30.0, 210.0, 60.0, 60.0); NSLog(@"I'm being redrawn."); if (counter == 0){ CGContextFillEllipseInRect(ref, veryNewRect); } else{ CGContextFillEllipseInRect(ref, rect); } counter++; NSLog(@"New value of counter is %d", counter); } - (void)setNeedsDisplay{ [super setNeedsDisplay]; [self drawRect:newRect]; } - (void)dealloc { [super dealloc]; } @end I've got two questions: 1) Why is it updating counter 6 times? I removed the line [super setNeedsDisplay]; but it becomes 4 times. 2) What is that invalid context error? Thanks guys.

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  • Currency Mask

    - by Helena
    I need to create a currency mask. I did lines of command and it's works fine, but when i set the value in textfield, occurred infinit loop. I monitoring the textfield with Editing Changed behavior, to catch each caracter that the user set, but when i try to change the text value, the infinity loop happens. :( Somebody have a simple code?

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  • NSURLConnection not "firing" until UITableView scrolls..

    - by Simon
    Hi, I've got a UITableView that loads an image asynchronously and places it in the UITableViewCell once it's loaded (I'm using almost the exact same code as in the "LazyTableImages" tutorial). This works fine for all images when I scroll the table, but it's not loading the images that are first in the view. The code is definitely working fine as the class that actually sends the NSURLConnection request is being called correctly (I added an NSLog and it reached the console). The NSURLConnection is just not calling the delegate methods (didReceiveData, connectionDidFinishLoading, etc). Here's my code: HomeController.m - (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]; NSArray *feed = [feeds objectAtIndex: indexPath.row]; /** * Name of person */ [...] /** * Feed entry */ [...] /** * Misc work */ [...] } FeedRecord *feedRecord = [self.entries objectAtIndex:indexPath.row]; if( !feedRecord.image ) { if (self.table.dragging == NO && self.table.decelerating == NO) { [self startIconDownload:feedRecord forIndexPath:indexPath]; } cell.imageView.image = [UIImage imageNamed:@"Placeholder.png"]; } return cell; } - (void)startIconDownload:(FeedRecord *)feedRecord forIndexPath:(NSIndexPath *)indexPath { IconDownloader *iconDownloader = [imageDownloadsInProgress objectForKey:indexPath]; if (iconDownloader == nil) { iconDownloader = [[IconDownloader alloc] init]; iconDownloader.feedRecord = feedRecord; iconDownloader.indexPathInTableView = indexPath; iconDownloader.delegate = self; [imageDownloadsInProgress setObject:iconDownloader forKey:indexPath]; [iconDownloader startDownload]; [iconDownloader release]; } } IconDownload.m #import "IconDownloader.h" #import "FeedRecord.h" #define kAppIconHeight 48 @implementation IconDownloader @synthesize feedRecord; @synthesize indexPathInTableView; @synthesize delegate; @synthesize activeDownload; @synthesize imageConnection; #pragma mark - (void)dealloc { [feedRecord release]; [indexPathInTableView release]; [activeDownload release]; [imageConnection cancel]; [imageConnection release]; [super dealloc]; } - (void)startDownload { NSLog(@"%@ %@",@"Started downloading", feedRecord.profilePicture); // this shows in log self.activeDownload = [NSMutableData data]; // alloc+init and start an NSURLConnection; release on completion/failure NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest: [NSURLRequest requestWithURL: [NSURL URLWithString:feedRecord.profilePicture]] delegate:self]; self.imageConnection = conn; NSLog(@"%@",conn); // this shows in log [conn release]; } - (void)cancelDownload { [self.imageConnection cancel]; self.imageConnection = nil; self.activeDownload = nil; } #pragma mark - #pragma mark Download support (NSURLConnectionDelegate) - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { NSLog(@"%@ %@",@"Got data for", feedRecord.profilePicture); [self.activeDownload appendData:data]; } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog(@"%@",@"Fail!"); // Clear the activeDownload property to allow later attempts self.activeDownload = nil; // Release the connection now that it's finished self.imageConnection = nil; } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { NSLog(@"%@ %@",@"Done", feedRecord.profilePicture); // Set appIcon and clear temporary data/image UIImage *image = [[UIImage alloc] initWithData:self.activeDownload]; self.feedRecord.image = image; self.activeDownload = nil; [image release]; // Release the connection now that it's finished self.imageConnection = nil; NSLog(@"%@ %@",@"Our delegate is",delegate); // call our delegate and tell it that our icon is ready for display [delegate feedImageDidLoad:self.indexPathInTableView]; } @end Has anyone else experienced anything like this or can identify an issue with my code? Thanks!

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  • EXC_BAD_ACCESS on [error localizedDescription];

    - by david
    This Code trows an EXC_BAD_ACCESS: NSError* error; if(![appdelegate.managedObjectContext countForFetchRequest:request error:&error]) { DLog(@"Failed to save to data store: %@", [error localizedDescription]); NSArray* detailedErrors = [[error userInfo] objectForKey:NSDetailedErrorsKey]; if(detailedErrors != nil && [detailedErrors count] > 0) { for(NSError* detailedError in detailedErrors) { DLog(@" DetailedError: %@", [detailedError userInfo]); } } else { DLog(@" %@", [error userInfo]); } }

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  • Autoresize UIScrollView

    - by Sebastian
    I made a UIViewController, which programatically generates a UIScrollView. Everything's fine, but when I rotate the Device, the UIScollView should resize so it takes the complete width of my View. Is there a way to do that without rebuilding the complete UIScrollView ? Thx a lot ! Sebastian This is called in my viewDidLoad: -(void)buildmyScroller { myScroller = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 800, 768, 100)]; //...adding some subviews to myScroller thumbScroller.contentSize = CGSizeMake(3000, 100); [[self view] addSubview:myScroller]; } Then I tried to resize myScroller with this: -(void)changemyScroller { UIInterfaceOrientation interfaceOrientation = self.interfaceOrientation; if (interfaceOrientation == UIInterfaceOrientationPortrait) { [thumbScroller setFrame:CGRectMake(0, 805, 768, 150)]; } else if (interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown){ thumbScroller.frame = CGRectMake(0, 805, 768, 150); } else if (interfaceOrientation == UIInterfaceOrientationLandscapeLeft){ thumbScroller.frame = CGRectMake(0, 549, 1024, 150); } else if (interfaceOrientation == UIInterfaceOrientationLandscapeRight){ thumbScroller.frame = CGRectMake(0, 549, 1024, 150); } } And called the method in didAnimateFirstHalf... cause I'm not shure where else to call it. Thx a lot again !!

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  • Record AVAudioPlayer output using AVAudioRecorder

    - by Kieran
    In my app the user plays a sound by pressing a button. There are several buttons which can be played simultaneously. The sounds are played using AVAudioPlayer instances. I want to record the output of these instances using AVAudioRecorder. I have set it all up and a file is created and records but when I play it back it does not play any sound. It is just a silent file the length of the recording. Does anyone know if there is a setting I am missing with AVAudioPlayer or AVAudioRecorder? Thanks

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  • Asynchronous NSURLConnection Throws EXC_BAD_ACCESS

    - by Sheehan Alam
    I'm not really sure why my code is throwing a EXC_BAD_ACCESS, I have followed the guidelines in Apple's documentation: -(void)getMessages:(NSString*)stream{ NSString* myURL = [NSString stringWithFormat:@"http://www.someurl.com"]; NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:myURL]]; NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; if (theConnection) { receivedData = [[NSMutableData data] retain]; } else { NSLog(@"Connection Failed!"); } } And my delegate methods #pragma mark NSURLConnection Delegate Methods - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { // This method is called when the server has determined that it // has enough information to create the NSURLResponse. // It can be called multiple times, for example in the case of a // redirect, so each time we reset the data. // receivedData is an instance variable declared elsewhere. [receivedData setLength:0]; } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { // Append the new data to receivedData. // receivedData is an instance variable declared elsewhere. [receivedData appendData:data]; } - (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { // release the connection, and the data object [connection release]; // receivedData is declared as a method instance elsewhere [receivedData release]; // inform the user NSLog(@"Connection failed! Error - %@ %@", [error localizedDescription], [[error userInfo] objectForKey:NSErrorFailingURLStringKey]); } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { // do something with the data // receivedData is declared as a method instance elsewhere NSLog(@"Succeeded! Received %d bytes of data",[receivedData length]); // release the connection, and the data object [connection release]; [receivedData release]; } I get an EXC_BAD_ACCESS on didReceiveData. Even if that method simply contains an NSLog, I get the error. Note: receivedData is an NSMutableData* in my header file

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  • Core data many-to-many relationship - Predicate question

    - by Garry
    In my Core Data model I have two entities: List and Patient. List has an attribute called 'name'. A List can have any number of Patients and each Patient can belong to any number of different lists. I have therefore set a relationship on List called 'patients' that has an inverse to-many relationship to Patient AND a relationship on Patient called 'lists' that has a to-many relationship to List. What I'm struggling to figure out is how to create a Predicate that will select all Patients that belong to a particular List name. How would I go about this? I have never used relationships before in Core Data. Thanks,

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  • UITableview titleForHeaderInSection not displaying correctly

    - by mjdth
    I have some VERY simple code to return the title for a section header: - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { if (section==0) { return @""; } else if (section==1) { return @"Actions"; } else if (section==2) { return @"Attached To"; } return @""; } For some reason when the headers are actually displayed on the simulator, half of the time they're simply the first letter and then ellipses. Scrolling up and down (to refresh the header view most likely) will result in the title showing correctly roughly half the time and showing incorrectly the other half of the time. Do anyone have any idea what could be causing this? I think this is more of a recent development, but it seems to happen in almost all UITableViews in my application. I don't want to say this is a 3.2 issue, but it might have started happening around then, but either way it must be related to the code somehow. Thank you.

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  • Objective-C partial implementation of classes in separate files

    - by Aran Mulholland
    I am using core data and am generating classes from my data model. I implement custom methods in these classes, however when i regenerate i generate over the top so i end up copying and pasting a bit. What i would like to do is split my implementation files ('.m') so i can have one header file with multiple '.m' files. then i can keep my custom methods in one and not have to worry about erasing them when i regenerate. I use this technique in .NET a lot with its partial keyword. Is there anything similar in objective-C

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  • View outlet not set with UINavigationController

    - by Sheehan Alam
    I have a NIB that contains a UINavigationController which has a UIViewController. The UIViewController is being loaded externally from another nib. I am unable to set the view property thus I get the error: *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[UIViewController _loadViewFromNibNamed:bundle:] loaded the "LBRootViewController" nib but the view outlet was not set.' How can I set my view property correctly?

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  • NSString to NSData Failing in Encoding

    - by Travis
    I'm trying to use NSXmlParser to parse ISO-8859-1 data. Using Apple's own example for parsing ISO-8859-1, I have the following. NSString *xmlFilePath = [[NSBundle mainBundle] pathForResource:sampleFileName ofType:@"xml"]; NSString *xmlFileContents = [NSString stringWithContentsOfFile:xmlFilePath encoding:NSISOLatin1StringEncoding error:nil]; NSLog(@"contents: %@", xmlFileContents); I see that in the console, the contents of the string is accurate. However when I try to convert it to an NSData object (for use with the parser), I do the following. NSData *xmlData = [xmlFileContents dataUsingEncoding:NSISOLatin1StringEncoding]; But then when my didStartElement delegate gets called, I see  showing up which I think is from an encoding discrepancy. Can NSXmlParser handle ISO-8859-1 and if so, what am I doing wrong?

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  • [self autorelease] not doing dealloc

    - by jonydep
    i have this in the superview: mySubView = [[MySubView alloc] init]; [self addSubview:mySubView]; [mySubView release]; then at some point later, in the sub view, this: [self removeFromSuperview]; when i debug it, i notice that the dealloc for the subview is never called, even though i'm fairly sure the reference count should be 0. any ideas why this might be? thanks.

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  • How do I set an Array in one class with another array in another class in Objective-C

    - by Stef
    Hi Guys, I've populated and array with data like this in one class... PowerClass .h NSMutableArray pickerArray; @property (nonatomic, retain) NSMutableArray pickerArray; - PowerClass .m @synthesize pickerArray; @implementation NSMutableArray *array = [[NSArray alloc] initWithObjects:@"stef", @"steve", @"baddamans", @"jonny", nil]; pickerArray = [NSMutableArray arrayWithArray:array]; And I'm trying to set the Array in another class WeekClass .h PowerClass *powerClass; NSMutableArray *pickerData; @property (nonatomic, retain) NSMutableArray pickerData; @property (nonatomic, retain) PowerClass *powerClass; WeekClass .m @implementation pickerData = [NSMutableArray arrayWithArray:powerClass.pickerArray]; I have no errors or warnings. It just crashes. The NSLog says that the powerClass.PickerArray is Null... I don't know why this is... Please help point me in the right direction... Thanx guys Stef :-)

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  • Cocos2D SpriteSheet animation problem, my number of frames is much larger.

    - by vaibhav-tekam
    Hello, I am trying to use SpriteSheet to run an animation. My frames are of 320x480 in size each, So I am able to put max 6 frames on the texture image. But my animation consists of frame number ranging from 50 to 200 sometimes, and all are of size 320x480. But this much number of frames cannot be added on the Texture image as the size is restricted to 1024x1024. Is there any other approach I can try out. Can I play one animation after the other.And won't it be hampering the performance. Please, I need suggestions. Best, Vaibhav Tekam.

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  • MGTwitterEngine

    - by deep8981
    Hi everyne, I am using mgtwitterEngine to integrate twitter functionality.In my application i want response in XML format so i have done all the changes as metion in readme of mgtwiiter for example i have done #define YAJL_AVAILABLE 0 in MGTwitterEngineGlobalHeader.h and define USE_LIBXML 1 in MGTwitterEngine.m file and i am checking that API_FORMAT is xml too but whenever i am getting response i am getting in json format. Please can any one tell me what am i missing? any help would be appreciated. Thaks

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  • Subview position issue after UIOrientation (rotation) change

    - by asadqamber
    I have a viewController and have added a subview in it programatically. secondView.autoresizingMask = UIViewAutoresizingFlexibleWidth; [self.view addSubview:secondView]; I guess when the device rotates, my mainViewController knows that orientation changed, but the subview (secondView) inside the mainViewController does not know this, so I change its frame to landscape size in willRotateToInterfaceOrientation. secondView.frame = CGRectMake(0, 0, 480 , 260); This does not set in the correct position, it's 11 px below the NavigationBar. Why does it start from 11 px below the navigation bar? The navigation bar shrinks when we move from portrait to landscape mode and its because of this that my subview is 11px below.

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  • SQLite - a smart way to remove and add new objects

    - by Ilya
    Hi, I have a table in my database and I want for each row in my table to have an unique id and to have the rows named sequently. For example: I have 10 rows, each has an id - starting from 0, ending at 9. When I remove a row from a table, lets say - row number 5, there occurs a "hole". And afterwards I add more data, but the "hole" is still there. It is important for me to know exact number of rows and to have at every row data in order to access my table arbitrarily. There is a way in sqlite to do it? Or do I have to manually manage removing and adding of data? Thank you in advance, Ilya.

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  • UIALertView - retreive textfield value from textfield added via code

    - by George
    Here is the code I have to create an UIalertView with a textbox. UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Enter A Username Here" message:@"this gets covered!" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:@"OK!", nil]; UITextField *myTextField = [[UITextField alloc] initWithFrame:CGRectMake(12, 45, 260, 25)]; CGAffineTransform myTransform = CGAffineTransformMakeTranslation(0, 60); [alert setTransform:myTransform]; alert.tag = kAlertSaveScore; [myTextField setBackgroundColor:[UIColor whiteColor]]; [alert addSubview:myTextField]; [alert show]; [alert release]; [myTextField release]; My question is, how do I get the value from the textfield in: - (void) alertView:(UIAlertView *) actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { } I know I can get the standard stuff for the alertview such as actionSheet.tag and such, but how would I get the above created textfield? Thanks in advance for any and all help. Geo...

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