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• Int or NSInteger as object for method argument. Objective-C

  - by sergiobuj

  Hi. I'm having some trouble passing a number as an argument for a method: -(void) meth2:(int)next_int; And to call that method i need this: int next_int = 1; [self performSelectorOnMainThread:@selector(meth2:) withObject:next_int waitUntilDone:NO]; //update next_int and call meth2 again at this point i get a "pointer from integer without a cast" error, and would happen the same with a NSInteger. A NSNumber is not useful because it's immutable and i need to change the value constantly. Any Idea how can i do this? Thanks.

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• Repeated Scene Trees (Java3d / OpenGL)

  - by Jim

  Hello, I want to make a 3d scene that loops around on its self. That is to say, if you keep going in any direction, you will loop back to the other side. My current implementation is so bad, it's embarrassing to admit to it. I redraw the each change twenty-seven times, to make a 3x3x3 scene cube. When the user reaches the end of the middle cube, I jump them over to the other side. Maintaining consistency (let alone performance) is a nightmare. Total Disaster. This doesn't seem like it would be an unusual request, so I'm wondering if anyone knows of a more legit solution. Thanks!

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• Ruby on Rails protect_from_forgery best practice

  - by randombits

  I'm currently working on building a RESTful web api with ruby on rails. I haven't bothered putting a proper authentication scheme into the API yet as I'm ensuring that tests and the basic behavior of the API is working all locally first. Upon testing non-HTTP GET type requests such as HTTP POST/DELETE/PUT, stuff chokes because protect_from_forgery is on by default. How does this work when I'm working in practice since essentially the idea is in a RESTful API that there is no state. The client does not have a session or a cookie associated with the server. Each request is an atomic, self-executed request. The user will supply some credentials to ensure they are who they say they are, but other than that, does protect_from_forgery make sense at this point? Should it remain enabled?

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• how to stop animation after using beginAnimations?

  - by www.ruu.cc

  i use the following code to do a string rolling, but how to stop the animation? [UIView beginAnimations:@"ruucc" context:NULL]; [UIView setAnimationDuration:12.8f]; [UIView setAnimationCurve:UIViewAnimationCurveLinear]; [UIView setAnimationDelegate:self]; [UIView setAnimationRepeatAutoreverses:NO]; [UIView setAnimationRepeatCount:999999]; frame = label1.frame; frame.origin.x = -12; label1.frame = frame; [UIView commitAnimations];

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• drawRect context Error

  - by user361228

  Hi, I heard that a lot of people get a context error by not using drawRect Now I have this: - (void)drawRect:(CGRect)rect { NSLog(@"drawRect: Starts"); CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetRGBStrokeColor(context, 1.0, 1.0, 1.0, 1.0); CGContextSetLineWidth(context, 3.0); CGContextMoveToPoint(context, lineStart.x, lineStart.y); CGContextAddLineToPoint(context, lineEnd.x, lineEnd.y); CGContextStrokePath(context); } Error: <Error>: CGContextSetRGBStrokeColor: invalid context Which had work on previous programs, but not on this one. Whats different: I have a view controller, which calls this UIView: -(void)createLine:(CGPoint)start:(CGPoint)end { NSLog(@"createLine: Starts"); lineEnd = start; lineStart = end; self = [super initWithFrame:drawRect:CGRectMake(fmin(lineStart.x, lineEnd.x), fmin(lineStart.y, lineEnd.y), fabs(lineStart.x - lineEnd.x), fabs(lineStart.y - lineEnd.y))]; } This is my first question, and I am not sure how much info code I should be putting here so be easy on me :D Thanks

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• Incorrect value for sum of two NSIntegers

  - by Antonio

  Hi everybody: I'm sure I'm missing something and the answer is very simple, but I can't seem to understand why this is happening. I'm trying to make an average of dates: NSInteger runningSum =0; NSInteger count=0; for (EventoData *event in self.events) { NSDate *dateFromString = [[NSDate alloc] init]; if (event.date != nil) { dateFromString = [dateFormatter dateFromString:event.date]; runningSum += (NSInteger)[dateFromString timeIntervalSince1970]; count += 1; } } if (count>0) { NSLog(@"average is: %@",[NSDate dateWithTimeIntervalSince1970:(NSInteger)((CGFloat)runningAverage/count)]); } Everything seems to work OK, except for runningSum += (NSInteger)[dateFromString timeIntervalSince1970], which gives an incorrect result. If I put a breakpoint when taking the average of two equal dates (2009-10-10, for example, which is a timeInterval of 1255125600), runningSum is -1784716096, instead of the expected 2510251200. I've tried using NSNumber and I get the same result. Can anybody point me in the right direction? Thanks! Antonio

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• Architectural advice on connecting multiple diverse sites into a single community.

  - by Aleksandar

  Hi SO, I've been given a task to connect multiple sites of the same client into a single network. So i would like to hear an architectural advice on connecting these sites into a single community. These sites include: 1. Invision Power Board Forum (the most important site) 2. 3 custom made cms-s (changes to code allowable) 3. 1 drupal site 4. 3-4 wordpress blogs Requirements are as follows: 1. Connecting all users of all sites into a single administrable entity. With permissions changing ability, users banning etc. 2. Later on, based on this implementation I have to implement "facebook like" chat, which will be available to all users regardless of place of login. I have few ideas on my mind on how to go with this, but would like to hear some people with more experience and expertize than my self. Cheers!

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• Is it possible to mask CALayer in iPhone?

  - by Eonil

  I'm trying to mask CALayer with a bitmap image. And I failed masking CALayer. My code is: // 'PreloadViewController layerWithImageNamed' create a layer and set it's contents as specified UIImage. CALayer* title = [PreloadViewController layerWithImageNamed:@"pinkhug_txt.png"]; [[[self view] layer] addSublayer:title]; CALayer* title_mask = [PreloadViewController layerWithImageNamed:@"hug_mask.png"]; [title setMask:title_mask]; The Apple reference says "CALayer in iPhone does not support mask property". But there is a postings about this on SO. Is it possible? Or what's wrong with my code?

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• Writing a rails validator with integer

  - by user297008

  I was trying to write a validation for Rails to ensure that a price entered on a form was greater than zero. It works…sort of. The problem is that when I run it, val is turned into an integer, so it thinks that .99 is less than .1. What's going on, and how should I fix the code? class Product < ActiveRecord::Base protected def self.validates_greater_than_zero(*attr_names) validates_each(attr_names) do |record, attr, val| record.errors.add(attr, "should be at least 0.01 (current val = #{val.to_f})") if val.nil? || val < 0.01 end end public validates_presence_of :title, :description, :image_url validates_numericality_of :price validates_greater_than_zero :price end

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• How can I pre-authorize authopen?

  - by Georg

  I'm using authopen inside one of my programs to modify files owned by root. As can be seen in the screenshot below authopen asks for a admin password. What I'd like to achieve is that the dialog shows my app's name and then passes the authorization to authopen. Code Launching authopen which returns an authorized file descriptor. int pipe[2]; socketpair(AF_UNIX, SOCK_STREAM, 0, pipe); if (fork() == 0) { // child // close parent's pipe close(pipe[0]); dup2(pipe[1], STDOUT_FILENO); const char *authopenPath = "/usr/libexec/authopen"; execl(authopenPath, authopenPath, "-stdoutpipe", [self.device.devicePath fileSystemRepresentation], NULL); NSLog(@"Fatal error, quitting."); exit(-1); } // parent // close childs's pipe close(pipe[1]); // get file descriptor through sockets I'd really like not to use AuthorizationExecuteWithPrivileges because then I'd have to get more rights than I want to.

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• iPad UIViewController loads as portrait when device is in landscape

  - by jud

  I have an application with 3 view controllers. They are all have shouldAutoRotateToInterfaceOrientation returning YES. The first two, my main menu and my submenu both autorotate just fine. The third viewcontroller, which programatically loads a UIImageView from a jpg file in the program's bundle, will only display in portrait. In the viewcontroller containing the image, i have this: NSString *imageName = [NSString stringWithFormat:@"%@-00%d.jpg",setPrefix,imageNumber]; UIImageView *pictureView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:imageName]]; pictureView.frame = CGRectMake(0, 0, 1024, 768); [self.view addSubview:pictureView]; and again, I have shouldAutoRotateToInterfaceOrientation returning YES for all orientations. My image shows up, but is sideways, and the 0,0,1024,768 values I used to make my rectangle start from the top right corner going down, instead of starting at the top left and going across (holding in landscape). Am I missing a parameter I need to set in order to ensure the imageview shows up in landscape instead of portrait?

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• is it possible to request UIWebView using user agent as Safari on iPhone?

  - by RAGOpoR

  i try to request on my application via this url http://reader.mac.com/mobile/v1/http%3A%2F%2Ffeeds.feedburner.com%2F9To5Mac-MacAllDay and it also return that it available on iPhone only how can i fix it? mycode NSMutableURLRequest *urlRequest = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString: myurl]]; [urlRequest setValue: @"iPhone" forHTTPHeaderField: @"Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_0 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7A341 Safari/528.16"]; [self.myWebView loadRequest:urlRequest];

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• MPMoviePlayerViewController crash on iOS 6.0

  - by user1471568

  I have a trouble in my app for the iOS6.0. It works perfectly fine on iOS 5.1.1 and under, but on the 6.0 shows exc_bad_access. please let me know why. -(void)endAniView{ if (moviePlayer!=nil) { [moviePlayer.moviePlayer stop]; [self removeFromSuperview]; } } this method called when user touches a button. and below are NEW ERROR MESSAGE and I've never seen before ios 6.0 2012-09-18 16:13:22.410 KiKiSong[992:907] [MPAVController] Autoplay: Disabling autoplay for pause 2012-09-18 16:13:22.411 KiKiSong[992:907] [MPAVController] Autoplay: Disabling autoplay 2012-09-18 16:13:22.450 KiKiSong[992:907] [MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 1, on player: 0) please help me. Thanks

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• How to reload a uiviewcontroller on the iPhone

  - by Buffernet

  Hi, I'm trying to reload a value I set on UIViewController to update each time I transition with this code (coming and going are both UIViewControllers): coming.phoneNumber = aPhoneNumber; [coming viewWillAppear:YES]; [going viewWillDisappear:YES]; [going.view removeFromSuperview]; [self.window insertSubview: coming.view atIndex:0]; [going viewDidDisappear:YES]; [coming viewDidAppear:YES]; when the phone number value changes in the coming view it never shows up when the view is inserted into the subview. How do I make view show the updated phone number?

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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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• iPhone landscape navigation back action shows vertical view transition?

  - by Code Shogun

  I have a regular UINavigationController and I push a series of UIViewController into the stack. The view transition for push controller is horizontal animation transition: [self.navigationController pushViewController:controller animated:YES]; However, when I press the Back button on the navigation bar, the view transition animation is vertical (vertically dropping down the previous controller/view). I don't seem to find any way to make this horizontal. This happens only in Landscape mode. Portrait mode the transition all happens as horizontal flip transition. Can anyone shed any light on this? Thanks

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• Microsoft Quotation

  - by Asad Jibran Ahmed

  I don't know if this is the right place to ask this question, but I honestly have exhausted my self searching for the last hour. I am looking for a quotation made about Microsofts software. It goes something along the lines of: "They may make 2nd grade crappy software, but by God they know how to design interfaces" It was by a somewhat popular open source personality about the lack of good interface design in open source software. Does any one know the exact quotation? It will be a great help if someone can point me in the right direction.

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• Can somebody explain this Objective C method declaration syntax

  - by Doug R

  I'm working through an iPhone development book* without really knowing Objective C. For the most part I'm able to follow what's going on, but there are a few method declarations like the one below that I'm having a bit of trouble parsing. For example: - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger) section { return [self.controllers count]; //controllers is an instance variable of type NSArray in this class } It looks this is a method called numberOfRowsInSection, and it returns an NSInteger, and takes an NSInteger as a parameter which is locally called 'section'. But I don't understand all the references to tableView, or why this takes a parameter when it is not used within the method. Can somebody clarify this? Thanks. *p. 258, Beginning iPhone 3 Development, by Mark and LaMarche, published by Apress

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• save selected row in UITableView after reloadData

  - by vinnitu

  I write custom jabber client in iphone. I use xmppframework as engine. And I have UITableViewController with NSMutableArray for repesent contact list. When i receive(or somebody change it contents) roster (aka contact list) i wanna change UITableView items (add/remove/modify). So if User work with listView at time when list updates by [items addObject:newItem]; [self.tableView reloadData]; user lost current selection item. So, my question is howto save (if possible, i mean if given selected item not removed) current select item after reloadData? Thx.

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• implicit argument passing of super from method defined by define_method() is not supported. Specify

  - by jaycode

  Most of you should already know Pragmatic book's "Agile web dev with rails" (third edition). On page 537 - 541 it has "Custom Form Builders" code as follows: class TaggedBuilder < ActionView::Helpers::FormBuilder # <p> # <label for="product_description">Description</label><br/> # <%= form.text_area 'description' %> #</p> def self.create_tagged_field(method_name) define_method(method_name) do |label, *args| @template.content_tag("p" , @template.content_tag("label" , label.to_s.humanize, :for => "#{@object_name}_#{label}") + "<br/>" + super) end end field_helpers.each do |name| create_tagged_field(name) end end This code doesn't work with Ruby 1.9.1. It returns error as follows: implicit argument passing of super from method defined by define_method() is not supported. Specify all arguments explicitly. (ActionView::TemplateError) My question is: What should I change in the code to fix this? Thank you

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• Why can't I set a custom color-tint for the UINavigationBar?

  - by mobibob

  I want to change the color on the navigation bar and the documentation states not to attempt to change the 'alpha' value. So, how can I set a color that is not the SDK defined values (e.g., [UIColor redColor], brownColor, etc.) if all the constructors provide an alpha value? I tried getting the current alpha value but that did not help. When I use a custom color, it causes the navigation bar to look like an x-ray (a scraggy, black-on-white). [self.navigationController.navigationBar setTintColor: [UIColor brownColor]];

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• iPhone FBConnect, dashboard.addnews

  - by Dmitry

  Hi, The question is: how to add news via FBConnect?? I have the following code: NSString *newsBody = @"[{\"message\": \"News message\" }]"; NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObject:newsBody forKey:@"news"]; [[FBRequest requestWithDelegate:self] call:@"facebook.dashboard.addnews" params:params dataParam:nil]; After I sent the request I received the success responce. But I can't see the new news in the facebook account!! Also, I tried to add full info into news parameter (http://wiki.developers.facebook.com/index.php/Dashboard.addNews):: NSString *newsBody = @"[{\"message\": \"News message\",\"action_link\": {\"text\": \"link text\", \"href\": \"http: //google.com\"} }]"; But this request returns error :( Thanks in advance!

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• Detecting rotation to landscape manually

  - by Thomas Joos

  hi all, I am working on an iPhone application based on UITabBarController and UIViewControllers for each page. The app needs to run in portrait mode only, so every view controller + app delegate goes with this line of code: (BOOL)shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation)interfaceOrientation { return (interfaceOrientation == UIInterfaceOrientationPortrait); } There is one view controller where I would like to pop up a UIImageView when the iPhone is rotaed to landscapeleft. The design of the image looks landscape, although the width and height are 320x460 ( so its portrait ). How can/should I detect this type of rotation manually, just in this specific view controller, withouth having an auto rotation on the entire view? Thomas UPDATE: Thanks! I added this listener in the viewDidLoad: [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didRotate:)name:UIDeviceOrientationDidChangeNotification object:nil]; the didRotate looks like this: (void) didRotate:(NSNotification *)notification { UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation]; if (orientation == UIDeviceOrientationLandscapeLeft) { //your code here } }

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• Creating a menu using xslt for Umbraco

  - by rob_g

  I've created a menu in umbraco using XSLT. The menu is using the usual ul and li elements and I'm displaying only the first level of the menu. The aim is to create a menu that expands to show the sub menu when I click a parent node (in the top level). I am after the xslt I would need to expose the sub menu when clicked. I think I would need to make use of ancestor-or-self to detect the current menu and parent menu and display them and also the $currentPage variable. I have the following xslt: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxml="urn:schemas-microsoft-com:xslt" xmlns:umbraco.library="urn:umbraco.library" xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon" xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes" xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath" xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions" xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings" xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets" xmlns:tagsLib="urn:tagsLib" xmlns:urlLib="urn:urlLib" exclude-result-prefixes="msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets tagsLib urlLib "> <xsl:output method="xml" omit-xml-declaration="yes"/> <xsl:param name="currentPage"/> <xsl:template match="/"> <div id="kb-categories"> <h3>Categories</h3> <xsl:call-template name="drawNodes"> <xsl:with-param name="parent" select="$currentPage/ancestor-or-self::node [@level=1]"/> </xsl:call-template> </div> </xsl:template> <xsl:template name="drawNodes"> <xsl:param name="parent"/> <xsl:if test="(umbraco.library:IsProtected($parent/@id, $parent/@path) = 0 or (umbraco.library:IsProtected($parent/@id, $parent/@path) = 1)) and $parent/@level = 1"> <ul class="kb-menuLevel1" > <xsl:for-each select="$parent/node [string(./data [@alias='showInMenu']) = 1]"> <li> <a href="/kb{umbraco.library:NiceUrl(@id)}"> <xsl:value-of select="@nodeName"/> </a> <xsl:variable name="level" select="@level" /> <xsl:if test="(count(./node [string(./data [@alias='showInMenu']) = '1']) &gt; 0)"> <xsl:call-template name="drawNodes"> <xsl:with-param name="parent" select="."/> </xsl:call-template> </xsl:if> </li> </xsl:for-each> </ul> </xsl:if> <xsl:if test="(umbraco.library:IsProtected($parent/@id, $parent/@path) = 0 or (umbraco.library:IsProtected($parent/@id, $parent/@path) = 1)) and $parent/@level &gt; 1"> <ul class="kb-menuLevel{@level}" style="display: none;"> <xsl:for-each select="$parent/node [string(./data [@alias='showInMenu']) = 1]"> <li> <a href="/kb{umbraco.library:NiceUrl(@id)}"> <xsl:value-of select="@nodeName"/> </a> <xsl:variable name="level" select="@level" /> <xsl:if test="(count(./node [string(./data [@alias='showInMenu']) = '1']) &gt; 0)"> <xsl:call-template name="drawNodes"> <xsl:with-param name="parent" select="."/> </xsl:call-template> </xsl:if> </li> </xsl:for-each> </ul> </xsl:if> </xsl:template> </xsl:stylesheet> I suspect this could be improved using apply-templates, but I'm not yet up to speed with that (this being only the second day of my learning xslt). My menu: Item 1 Item 2 Item 3 Item 4 when I click on Item 2 I want to see it's child menu too: Item 1 Item 2 -- Item 2.1 -- Item 2.2 Item 3 Item 4 and so on down the nested menu.

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• Memory leak using (void) alloc

  - by Rudiger

  I have seen a similar line of code floating about in Apples code: (void)[[URLRequest alloc] initializeRequestWithValues:postBody url:verifySession httpHeader:nil delegate:self]; URLRequest is my own custom class. I didn't write this and I think the guy that did just grabbed it from Apple's example. To me this should leak and when I test it I'm pretty sure it leaks 16 bytes. Would it? I know how to fix it if it does but wasn't sure as it was taken from Apple's code.

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