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  • Wall avoidance steering

    - by Vodemki
    I making a small steering simulator using the reynolds boid algorythm. Now I want to add a wall avoidance feature. My walls are in 3D and defined using two points like that: ---------. P2 | | P1 .--------- My agents have a velocity, a position, etc... Could you tell me how to make avoidance with my agents ? Vector2D ReynoldsSteeringModel::repulsionFromWalls() { Vector2D force; vector<Wall *> wallsList = walls(); Point2D pos = self()->position(); Vector2D velocity = self()->velocity(); for (unsigned i=0; i<wallsList.size(); i++) { //TODO } return force; } Then I use all the forces returned by my boid functions and I apply it to my agent. I just need to know how to do that with my walls ? Thanks for your help.

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  • Where is a Web Development Career fueled by Passion?

    - by JMC Creative
    Quick Background Since learning basic html 5 years ago, I've become completely obsessed with the technology, the logic, and the thrill of solving problems involved with building websites. I am still stuck at a thoroughly non-programming type job, but would really like to move into the field of web programming/design. I have no educational background in the field (was trained as a fine artist and tutor), but in the past few years have progressed fully self-taught (and self-motivated) from html to css to php, mysql, jquery, and am now building rich web applications. The Question How can I prove to a company that even though I have no education, I have a passion to learn whatever is thrown my way? ...That essentially I would come at every issue with not only knowledge, but with a passionate desire to solve it, whether that means tackling a new language or debugging code for hours at a time? p.s. Sorry for the stupid title.

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  • Connect players with same phone language settings

    - by Abin George
    I am working on a turn-based multiplayer game using game center. The game also use Spanish localisation. It is enabled by reading the device language settings. Now my requirement is: When i start a turn based match, my opponent should have the same language setting in his/her phone as I am having. How can I make this possible. I use the following code to connect - (void)findTurnBasedMatchWithViewcontroller:(UIViewController *)viewController forDelegate:(id)argDelegate { self.delegate = argDelegate; presentingViewController = viewController; GKMatchRequest *request = [[GKMatchRequest alloc] init]; request.minPlayers = 2; request.maxPlayers = 2; [manager setCurrentGameType:kTurnBased]; GKTurnBasedMatchmakerViewController *mmvc = [[GKTurnBasedMatchmakerViewController alloc] initWithMatchRequest:request]; mmvc.turnBasedMatchmakerDelegate = self; mmvc.showExistingMatches = NO; [presentingViewController presentViewController:mmvc animated:YES completion:^(void) { }]; }

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  • What are good HTML 5 and PHP 5 books to get? [closed]

    - by lardtard
    I am looking for beginner books into PHP 5 (Maybe with a bit into MySQL?) and HTML 5. I started self-teaching myself PHP although it has become a problem as the tutorials online are either outdated or just crap. I also managed to start learning with very little HTML knowledge so I am looking to brush up on my HTML knowledge and get more into PHP. I also am unsure weather I should be looking into XHTML or HTML5, or both so an answer to that would be splendid. I just want to become more self-sufficient and less reliant on other for my programming needs. I've searched Google for books but I'm just not sure which one is the "best" for me and makes for good practice and habits which brings me here.

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  • python factory function best practices

    - by Jason S
    Suppose I have a file foo.py containing a class Foo: class Foo(object): def __init__(self, data): ... Now I want to add a function that creates a Foo object in a certain way from raw source data. Should I put it as a static method in Foo or as another separate function? class Foo(object): def __init__(self, data): ... # option 1: @staticmethod def fromSourceData(sourceData): return Foo(processData(sourceData)) # option 2: def makeFoo(sourceData): return Foo(processData(sourceData)) I don't know whether it's more important to be convenient for users: foo1 = foo.makeFoo(sourceData) or whether it's more important to maintain clear coupling between the method and the class: foo1 = foo.Foo.fromSourceData(sourceData)

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  • What is the correct way to implement hit detection with non-rectangular sprites?

    - by hogni89
    What is the correct way to implement hit or touch detection for non-rectangular sprites in Cocos2d? I am working on a jigsaw puzzle, so our sprites have some strange forms (jigsaw puzzle bricks). As of now, we have implemented the "detection" this way: - (void)selectSpriteForTouch:(CGPoint)touchLocation { CCSprite * newSprite = nil; // Loop array of sprites for (CCSprite *sprite in movableSprites) { // Check if sprite is hit. // TODO: Swap if with something better. if (CGRectContainsPoint(sprite.boundingBox, touchLocation)) { newSprite = sprite; break; } } if (newSprite != selSprite) { // Move along, nothing to see here // Not the problem } } - (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event { CGPoint touchLocation = [self convertTouchToNodeSpace:touch]; [self selectSpriteForTouch:touchLocation]; return TRUE; } I know that the problem is in the keyword "sprite.boundingBox". Is there a better way of implementing this, or is it a limitation when using sprites based on .png's? If so, how should I proceed?

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  • Cloud Migration Lifecycle

    - by llaszews
    The first step in migrating to the cloud is the set up phase. This phase includes: 1. Plan Cloud Setup - Create a project plan. 2. Set up infrastructure - The IaaS and PaaS environments need to be installed and configured. This includes databases, network, hardware, disk and application servers. 3. Set up shared components - Are applications, database objects or other components going to be made accessible in the cloud ? These shared components need to be configured and made accessible. 4. Set up self-service portal - Customer self service provisioning, management and monitoring.

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  • Best skill set for a max. income entry level job? [closed]

    - by Emmett Gear
    I am interested in getting a bit more experience with programming before I get a job. What languages/skills are currently seeing the highest rates of employment? Are web-developers typically better-paid than desktop software programmers? Do web-developers require a wider skill set? I often see a number of different languages being listed as necessary on web development job applications. Will most potential employers except me to be very familiar with command line Linux? (I'm a Windows guy myself, but I've used Linux in the past). I realize that specialists in dying languages like COBOL or FORTRAN can make a lot of money too, but I am not interested in stuff like that.

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  • River City Give Camp 4-6 Feb 2011 in Richmond!

    - by andyleonard
    I'm often approached by community members who seek new or better employment. One problem? Experience. You need experience to get a new or better job; you can't get experience without the new gig. </ Catch22 > River City Give Camp is a way to gain some experience, but it's much more than that - it's also a great way to network with others currently working in the field. Sign up ! Show them what you've got! :{>...(read more)

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  • Two approaches to adding freelance/contract work to resume [on hold]

    - by melhosseiny
    Approach A Title, Company A Freelance + Title, Company B Title, Company C Freelance + Title, Company D Title, Intern, Company E Approach B Title, Company A Title, Company B Title, Self Title, Intern, Company D In approach B, you would list all freelance/contract work you did under the "Title, Self" experience. For example: Company A Project 1 Project 2 Company B Project 1 Question Which of these two approaches is better? And why? Update I think there's value in this question to the community as it relates specifically to programmers. I'd think that handling this issue on a resume is career-specific. Also, I've found similar questions on the site: Referring to freelance marketplaces as evidence of the experience for a potential full-time employer How to write freelancing in resume for programmers job In any case, I don't think it should be closed. It should be migrated to The Workplace or Freelancing.

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  • Problem serialising TextBuffer

    - by njallam
    The following is supposed to serialise a TextArea's content to a string. The first two line complete fine, however I have problems from then onwards. page_content = subject_content.get_nth_page(pn) page_name = subject_content.get_tab_label(page_content).get_text() c_buffer = page_content.get_buffer() c_format = c_buffer.register_serialize_tagset() serial = c_buffer.serialize(c_format, c_buffer.get_start_iter(), c_buffer.get_end_iter()) The first error I get is: Traceback (most recent call last): File "/home/nja/notetaker/notetaker/NotetakerWindow.py", line 251, in on_btn_save_clicked self.save() File "/home/nja/notetaker/notetaker/NotetakerWindow.py", line 160, in save c_format = c_buffer.register_serialize_tagset() File "/usr/lib/python2.7/dist-packages/gi/types.py", line 43, in function return info.invoke(*args, **kwargs) TypeError: register_serialize_tagset() takes exactly 2 arguments (1 given) When inserting None as a parameter to c_format = c_buffer.register_serialize_tagset() I get the following as well: Traceback (most recent call last): File "/home/nja/notetaker/notetaker/NotetakerWindow.py", line 251, in on_btn_save_clicked self.save() File "/home/nja/notetaker/notetaker/NotetakerWindow.py", line 161, in save serial = c_buffer.serialize(c_format, c_buffer.get_start_iter(), c_buffer.get_end_iter()) File "/usr/lib/python2.7/dist-packages/gi/types.py", line 43, in function return info.invoke(*args, **kwargs) TypeError: serialize() takes exactly 5 arguments (4 given) I have no idea of a workaround for that, however I shouldn't have to fill None in that other function in the first place. What is happening here?

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  • How strict are standard employer IP agreements about coding outside of work?

    - by JosephRT
    I'm in negotiations for a position with a large corporation and I'm reading their employment terms. In their IP/copyright section they state that anything that I do outside of work that is "similar" to what I perform on the job is also theirs. I understand that it's intentionally very vague to protect them, but I'm also a little nervous that it could be abused. The way I read it, anything I produce outside of work could be claimed as well, because it would fall under "programming". Is this relatively standard? Could I negotiate more specific terms (I have asked if I could get clarification)? Should I be worried that they could abuse this? I just don't want to be caught in a situation where come up with a (potentially) great idea outside of work and they swoop down and lay claim to it.

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  • Has the Appindicator or GtkMenu API changed in Saucy?

    - by marxjohnson
    I've written a custom application indicator, which isn't working properly on saucy. The menu is initialised with a few items, then updates regularly, adding or removing menu items. This worked fine <13.10, but on 13.10, the line that adds the menu to the indicator produces the following warning: Warning: /build/buildd/glib2.0-2.38.0/./gobject/gsignal.c:2475: signal 'child-added' is invalid for instance '0x24390e0' of type 'GtkMenu' self.ind.set_menu(self.menu) And the items added to the menu subsequently dont appear. A bug has been filed against several indicators for the same problem, but it's not clear to me whether this is a problem with the indicators as a result of an API change, or a bug in the GTK or Appindicator libraries. Does anyone know?

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  • Working environment

    - by Yottatron
    I realise that this might not be the right place to ask questions about employment and that the question my raise debate etc. The company I work for recently decided that rather than having one web developer working on sites from a branch it would be better to make that person come into head office and work in the middle of a busy call centre. Also they're expecting the developer to answer the phone if it rings and take messages. Does anyone find that strange? Is it really the right place for a programmer to work? Thanks for the advice

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  • Which countries have suitable laws for game development companies? [on hold]

    - by yoni0505
    Which countries are most suitable for game companies? By suitable I mean: Their laws let the business be more profitable. (for example: low taxes) Have less bureaucracy. (for example: creating a company, employment laws) Living there isn't expensive. (for example: rent and food prices) etc... In short - maximum revenue with minimum overhead. What other things do I have to consider when choosing the place to be in? Are there any articles about this subject? (I couldn't find any)

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  • NSURLSession and amazon S3 uploads

    - by George Green
    I have an app which is currently uploading images to amazon S3. I have been trying to switch it from using NSURLConnection to NSURLSession so that the uploads can continue while the app is in the background! I seem to be hitting a bit of an issue. The NSURLRequest is created and passed to the NSURLSession but amazon sends back a 403 - forbidden response, if I pass the same request to a NSURLConnection it uploads the file perfectly. Here is the code that creates the response: NSString *requestURLString = [NSString stringWithFormat:@"http://%@.%@/%@/%@", BUCKET_NAME, AWS_HOST, DIRECTORY_NAME, filename]; NSURL *requestURL = [NSURL URLWithString:requestURLString]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:requestURL cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:60.0]; // Configure request [request setHTTPMethod:@"PUT"]; [request setValue:[NSString stringWithFormat:@"%@.%@", BUCKET_NAME, AWS_HOST] forHTTPHeaderField:@"Host"]; [request setValue:[self formattedDateString] forHTTPHeaderField:@"Date"]; [request setValue:@"public-read" forHTTPHeaderField:@"x-amz-acl"]; [request setHTTPBody:imageData]; And then this signs the response (I think this came from another SO answer): NSString *contentMd5 = [request valueForHTTPHeaderField:@"Content-MD5"]; NSString *contentType = [request valueForHTTPHeaderField:@"Content-Type"]; NSString *timestamp = [request valueForHTTPHeaderField:@"Date"]; if (nil == contentMd5) contentMd5 = @""; if (nil == contentType) contentType = @""; NSMutableString *canonicalizedAmzHeaders = [NSMutableString string]; NSArray *sortedHeaders = [[[request allHTTPHeaderFields] allKeys] sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)]; for (id key in sortedHeaders) { NSString *keyName = [(NSString *)key lowercaseString]; if ([keyName hasPrefix:@"x-amz-"]){ [canonicalizedAmzHeaders appendFormat:@"%@:%@\n", keyName, [request valueForHTTPHeaderField:(NSString *)key]]; } } NSString *bucket = @""; NSString *path = request.URL.path; NSString *query = request.URL.query; NSString *host = [request valueForHTTPHeaderField:@"Host"]; if (![host isEqualToString:@"s3.amazonaws.com"]) { bucket = [host substringToIndex:[host rangeOfString:@".s3.amazonaws.com"].location]; } NSString* canonicalizedResource; if (nil == path || path.length < 1) { if ( nil == bucket || bucket.length < 1 ) { canonicalizedResource = @"/"; } else { canonicalizedResource = [NSString stringWithFormat:@"/%@/", bucket]; } } else { canonicalizedResource = [NSString stringWithFormat:@"/%@%@", bucket, path]; } if (query != nil && [query length] > 0) { canonicalizedResource = [canonicalizedResource stringByAppendingFormat:@"?%@", query]; } NSString* stringToSign = [NSString stringWithFormat:@"%@\n%@\n%@\n%@\n%@%@", [request HTTPMethod], contentMd5, contentType, timestamp, canonicalizedAmzHeaders, canonicalizedResource]; NSString *signature = [self signatureForString:stringToSign]; [request setValue:[NSString stringWithFormat:@"AWS %@:%@", self.S3AccessKey, signature] forHTTPHeaderField:@"Authorization"]; Then if I use this line of code: [NSURLConnection connectionWithRequest:request delegate:self]; It works and uploads the file, but if I use: NSURLSessionUploadTask *task = [self.session uploadTaskWithRequest:request fromFile:[NSURL fileURLWithPath:filePath]]; [task resume]; I get the forbidden error..!? Has anyone tried uploading to S3 with this and hit similar issues? I wonder if it is to do with the way the session pauses and resumes uploads, or it is doing something funny to the request..? One possible solution would be to upload the file to an interim server that I control and have that forward it to S3 when it is complete... but this is clearly not an ideal solution! Any help is much appreciated!! Thanks!

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  • Why does my UIWebView not Allow User Interaction?

    - by thomasmcgee
    Hi, I'm new to these forums so I apologize for my noobieness. I did as thorough a search as I could, but I couldn't find anyone else with this issue, applogise if this has been covered elsewhere. I've created a very simple example of my problem. I'm sure I'm missing something but I can't for the life of me figure out what. I'm creating a UIWebView and adding it to a custom view controller that inherits from UIViewController. When the app loads in the iPad simulator, the uiwebview loads the desired page, but the UIWebView is entirely unresponsive. The webview does not pan or scroll and none of the in page links can be clicked. However, if you change the orientation of the webview suddleny everything works. Thanks in advance for your help!! AppDelegate header #import <UIKit/UIKit.h> #import "EditorViewController.h" @interface FixEditorTestAppDelegate : NSObject <UIApplicationDelegate> { UIWindow *window; EditorViewController *editorView; } @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) EditorViewController *editorView; @end AppDelegate Implementation #import "FixEditorTestAppDelegate.h" #import "EditorViewController.h" @implementation FixEditorTestAppDelegate @synthesize window; @synthesize editorView; - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { NSLog(@"application is loading"); editorView = [[EditorViewController alloc] init]; [window addSubview:[editorView view]]; [window makeKeyAndVisible]; return YES; } - (void)dealloc { [window release]; [editorView release]; [super dealloc]; } @end View Controller header #import <UIKit/UIKit.h> @interface EditorViewController : UIViewController <UIWebViewDelegate> { UIWebView *webView; } @property (nonatomic, retain) UIWebView *webView; @end View Controller Implementation #import "EditorViewController.h" @implementation EditorViewController @synthesize webView; /* // The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) { // Custom initialization } return self; } */ // Implement loadView to create a view hierarchy programmatically, without using a nib. - (void)loadView { NSLog(@"loadView called"); UIView *curView = [[UIView alloc] init]; webView = [[UIWebView alloc] init]; webView.frame = CGRectMake(20, 40, 728, 964); webView.delegate = self; webView.backgroundColor = [UIColor redColor]; [curView addSubview: webView]; self.view = curView; [curView release]; } //Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; NSLog(@"viewDidLoad called"); NSURL *url = [[NSURL alloc] initWithString:@"http://www.nytimes.com"]; NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url]; [webView loadRequest:request]; [url autorelease]; [request release]; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Overriden to allow any orientation. return YES; } - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } - (void)viewDidUnload { webView.delegate = nil; [webView release]; [super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [super dealloc]; } @end

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  • How can I successfully dechiper Instruments Messages for iPhone Leak

    - by dubbeat
    Hi, I have a memory leak in my app. (This is the first of many I'm sure :() I've being trying to use Instruments to find it. Instruments gives me a lot of information but I think I must just not know how to use this information. What I did so far was 1) Run the app with Instruments 2) Memory Leak Occurs named general -stack 16 3) Find general - stack 16 in the object allocations part of instruments 4) The information here says the event type is a malloc, that webcore is responsible and the something named WKSetCurrentGraphicContext is the responsible caller. How can I use this given information to discover where in my code the leak is being caused? If I comment out the following function I don't get the leak warning so I guess it should be in there somewhere but I can't see where -(void)constructFeatured { NSString *imageName =[[NSString alloc] initWithFormat:@"%@%@%@",@"http://myweb/avatar_", featuredValueObject.featured_promo_artistid, @".jpg"]; NSURL *url = [NSURL URLWithString:imageName]; CGRect frame; frame.size.width=100; frame.size.height=100; frame.origin.x=20; frame.origin.y=39; [imageName release]; imageName=nil; SDWebImageManager *manager = [SDWebImageManager sharedManager]; UIImage *cachedImage = [manager imageWithURL:url]; if (cachedImage) { cachedImage =[ImageManipulator makeRoundCornerImage:cachedImage : 10 : 10]; UIImageView *avatarimageview = [[UIImageView alloc]initWithImage:cachedImage ]; avatarimageview.frame=frame; [self.view addSubview:avatarimageview]; UIView *spinny = [self.view viewWithTag:SPINNY_TAG]; [spinny removeFromSuperview]; [avatarimageview release]; } else { [manager downloadWithURL:url delegate:self]; } NSURL *url2 =[NSURL URLWithString:[NSString stringWithFormat:@"%@%@%@",@"http://myweb/", featuredValueObject.featured_promo_artistcountry , @".png"]]; CGRect flagframe; flagframe.size.width=16; flagframe.size.height=11; flagframe.origin.x=130; flagframe.origin.y=40; NSData* data = [[NSData alloc] initWithContentsOfURL:url2]; UIImage* img = [[UIImage alloc] initWithData:data]; UIImageView *imageflagview = [[UIImageView alloc] initWithImage: img]; imageflagview.frame=flagframe; [self.view addSubview:imageflagview]; [imageflagview release]; imageflagview=nil; [data release]; [img release]; [url release]; artistname =[[UILabel alloc]initWithFrame:CGRectMake(130,75, 200, 15)]; [artistname setFont:[UIFont fontWithName:@"Arial" size:(16.0)]]; artistname.backgroundColor= [UIColor clearColor]; artistname.textColor=[UIColor whiteColor]; artistname.text=featuredValueObject.featured_promo_artistname; [self.view addSubview:artistname]; [artistname release]; hasConstructedFeatured=YES; [featuredValueObject release]; featuredValueObject=nil; }

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  • How i set the background color in UIView using CGContext?

    - by Rajendra Bhole
    Hi, I have developed the application in which i want to set the background color of UIView which is already set on UIViewController.The code is below, @implementation frmGraphView /* // The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) { // Custom initialization } return self; } */ - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { // Initialization code } return self; } /* // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; } */ /* // Override to allow orientations other than the default portrait orientation. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } */ - (void)drawRect:(CGRect)rect { CGContextRef ctx = UIGraphicsGetCurrentContext(); CGContextClearRect(ctx, rect); //CGContextSetCMYKFillColor(ctx, 35.0, 56.0, 34.0, 30.0, 1.0); //CGContextSetRGBFillColor(ctx, 92.0f, 95.0f, 97.0f, 1.0f); //CGContextFillRect(ctx, CGRectMake(0, 0, 300, 280)); CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0); CGContextSetLineWidth(ctx, 2.0); float fltX1,fltX2,fltY1,fltY2=0; NSArray *hoursInDays = [[NSArray alloc] initWithObjects:@"0",@"1" ,@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"10",@"11",@"12", nil]; fltX1 = 30; fltY1 = 5; fltX2 = fltX1; fltY2 = 270; //Dividing the Y-axis CGContextMoveToPoint(ctx, fltX1, fltY1); CGContextAddLineToPoint(ctx, fltX2, fltY2); //float y = 275; for(int intIndex = 0 ; intIndex < [hoursInDays count] ; fltY2-=20, intIndex++) { CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0); CGContextMoveToPoint(ctx, fltX1-3 , fltY2); CGContextAddLineToPoint(ctx, fltX1+3, fltY2); CGContextSelectFont(ctx, "Helvetica", 14.0, kCGEncodingMacRoman); CGContextSetTextDrawingMode(ctx, kCGTextFill); CGContextSetRGBFillColor(ctx, 0, 255, 255, 1); CGAffineTransform xform = CGAffineTransformMake( 1.0, 0.0, 0.0, -1.0, 0.0, 0.0); CGContextSetTextMatrix(ctx, xform); const char *arrayDataForYAxis = [[hoursInDays objectAtIndex:intIndex] UTF8String]; CGContextShowTextAtPoint(ctx, fltX1-18, fltY2-18 , arrayDataForYAxis, strlen(arrayDataForYAxis)); CGContextStrokePath(ctx); } CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0); CGContextSetLineWidth(ctx, 2.0); fltX1 = 5; fltY1 = 250; fltX2 = 270; fltY2 = fltY1; NSArray *weekDays =[[NSArray alloc] initWithObjects:@"Sun", @"Mon", @"Tus", @"Wed", @"Thu", @"Fri", @"Sat", nil]; //Dividing the X-axis CGContextMoveToPoint(ctx, fltX1, fltY1); CGContextAddLineToPoint(ctx, fltX2, fltY2); //float y = 275; for(int intIndex = 0 ; intIndex < [weekDays count] ; fltX1+=33, intIndex++) { CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0); CGContextMoveToPoint(ctx, fltX1+52 , fltY2-3); CGContextAddLineToPoint(ctx, fltX1+52, fltY2+3); CGContextSelectFont(ctx, "Arial", 15.0, kCGEncodingMacRoman); CGContextSetTextDrawingMode(ctx, kCGTextFill); CGContextSetRGBFillColor(ctx, 0, 255, 255, 1); CGAffineTransform xform = CGAffineTransformMake( 1.0, 0.0, 0.0, -1.0, 0.0, 0.0); CGContextSetTextMatrix(ctx, xform); const char *arrayDataForXAxis = [[weekDays objectAtIndex:intIndex] UTF8String]; CGContextShowTextAtPoint(ctx, fltX1+37, fltY2+18 , arrayDataForXAxis, strlen(arrayDataForXAxis)); CGContextStrokePath(ctx); } } - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } - (void)viewDidUnload { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [super dealloc]; } @end

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  • Can't obtain reference to EKReminder array retrieved from fetchRemindersMatchingPredicate

    - by Scionwest
    When I create an NSPredicate via EKEventStore predicateForRemindersInCalendars; and pass it to EKEventStore fetchRemindersMatchingPredicate:completion:^ I can loop through the reminders array provided by the completion code block, but when I try to store a reference to the reminders array, or create a copy of the array into a local variable or instance variable, both array's remain empty. The reminders array is never copied to them. This is the method I am using, in the method, I create a predicate, pass it to the event store and then loop through all of the reminders logging their title via NSLog. I can see the reminder titles during runtime thanks to NSLog, but the local arrayOfReminders object is empty. I also try to add each reminder into an instance variable of NSMutableArray, but once I leave the completion code block, the instance variable remains empty. Am I missing something here? Can someone please tell me why I can't grab a reference to all of the reminders for use through-out the app? I am not having any issues at all accessing and storing EKEvents, but for some reason I can't do it with EKReminders. - (void)findAllReminders { NSPredicate *predicate = [self.eventStore predicateForRemindersInCalendars:nil]; __block NSArray *arrayOfReminders = [[NSArray alloc] init]; [self.eventStore fetchRemindersMatchingPredicate:predicate completion:^(NSArray *reminders) { arrayOfReminders = [reminders copy]; //Does not work. for (EKReminder *reminder in reminders) { [self.remindersForTheDay addObject:reminder]; NSLog(@"%@", reminder.title); } }]; //Always = 0; if ([self.remindersForTheDay count]) { NSLog(@"Instance Variable has reminders!"); } //Always = 0; if ([arrayOfReminders count]) { NSLog(@"Local Variable has reminders!"); } } The eventStore getter is where I perform my instantiation and get access to the event store. - (EKEventStore *)eventStore { if (!_eventStore) { _eventStore = [[EKEventStore alloc] init]; //respondsToSelector indicates iOS 6 support. if ([_eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)]) { //Request access to user calendar [_eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) { if (granted) { NSLog(@"iOS 6+ Access to EventStore calendar granted."); } else { NSLog(@"Access to EventStore calendar denied."); } }]; //Request access to user Reminders [_eventStore requestAccessToEntityType:EKEntityTypeReminder completion:^(BOOL granted, NSError *error) { if (granted) { NSLog(@"iOS 6+ Access to EventStore Reminders granted."); } else { NSLog(@"Access to EventStore Reminders denied."); } }]; } else { //iOS 5.x and lower support if Selector is not supported NSLog(@"iOS 5.x < Access to EventStore calendar granted."); } for (EKCalendar *cal in self.calendars) { NSLog(@"Calendar found: %@", cal.title); } [_eventStore reset]; } return _eventStore; } Lastly, just to show that I am initializing my remindersForTheDay instance variable using lazy instantiation. - (NSMutableArray *)remindersForTheDay { if (!_remindersForTheDay) _remindersForTheDay = [[NSMutableArray alloc] init]; return _remindersForTheDay; } I've read through the Apple documentation and it doesn't provide any explanation that I can find to answer this. I read through the Blocks Programming docs and it states that you can access local and instance variables without issues from within a block, but for some reason, the above code does not work. Any help would be greatly appreciated, I've scoured Google for answers but have yet to get this figured out. Thanks everyone! Johnathon.

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  • NSMutableString leaks on append or replaceOccurrencesOfString

    - by John
    Hello Folks, I know similar questions have been asked time and time again but I ask that you please bear with me as I cannot seem to find an answer that helps. My application has leaks that are driving me out of my mind. Actually, they are not reported as leaks using Leaks, but my net bytes in ObjectAlloc goes up and up and up and never stops, eventually leading to a crash if it goes on long enough (not very long). The problem occurs with NSMutableStrings. I think there is either something fundamental I don't understand about them, or I am facing another problem that I am having difficulty tracking down but keeps hiding behind the NSMutableStrings. Specifically, I am noticing that whenever I append to or perform a replace on a NSMutableString, ObjectAlloc reports what appear to be mismatches in malloc/frees behind the scene when resizing the NSMutableString. I'm sorry to say this is the second time I'm facing this problem - the first time I messed around for hours and hours and finally the problem went away (magic!) but I don't really know why. When I look at the code below (and believe me, I've stared at it for hours) I cannot see the problem. I look at the code and think to myself that I should be fine because I'm releasing the only object for which I am responsible (aString) and that NSMutableString should be taking care of cleaning up after any resizing it does. In the second example, just so you know in case it helps, the string being passed in comes from an ASIHTTPRequest object (it's the responseString) and I don't do anything at all with it. It's being called simply like so ([self DoStuff2:[request responseString]]) and I don't free the request myself either (I'm using a ASINetworkQueue and I assume that the requests are destroyed for me (I tried and caused errors because the request was already being release somewhere else). Also, I know it shouldn't do anything, but I even tried wrapping the code in autorelease pools, which of course did nothing. I should mention that this code is being run inside of an NSOperation. I thought that perhaps I am experiencing problems because NSOperations should create an autorelease pool for themselves, but I've tried that to no avail. Not related to NSMutableString, but I find I also have similar problems using the NSString componentsSeparatedByString method. Sometimes the memory used by the array that gets the separated components is never released. Hmmm...strings in general seem to be somewhat problematic for me it seems. I would appreciate ANY help anyone can provide. If you require more info, I'll be glad to add it. I do promise you that I've struggled with this (and other problems) for weeks and every problem I encounter I research hard and long until I find a solution - this is not an idle request, but a true cry for help! I've written so much code and now I'm trying to seal some small leaks etc and I notice this problem. Honestly, I cannot believe how memory management in Objective C can stump me so at times...I've read Apple's memory mgmt docs many times and I thought I thoroughly understood it and I try to be diligent about releasing objects I own, but sometimes I find myself wondering if I truly understand...I would like to put this to bed once and make sure I understand all this fully - to have this sort of question/problem after writing thousands of lines of code is more than a little scary/embarrassing/annoying. So again, if anybody has any insight, I'd be grateful. Thanks for your time and efforts. -(void)DoStuff { NSString *aString [ [[NSString alloc] initWithFormat:@"text %@ more text", self.strVariable]; [self.someMutableStringVar replaceOccurrencesOfString:@"replace" withString:aString options:NSCaseInsensitiveSearch range:NSMakeRange(0, [self.someMutableStringVar length])]; [aString release]; } -(void)DoStuff2:(NSString *)aString { [self.someMutableStringVar appendString:aString]; }

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