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  • Remove a ReactiveCocoa signal from a control

    - by dbarros
    If I assign a signal to a property of a control: RAC(self.loginButton.enabled) = [RACSignal combineLatest:@[ self.usernameTextField.rac_textSignal, self.passwordTextField.rac_textSignal ] reduce:^(NSString* username, NSString* password) { return @(username.length > 0 && password.length > 0); }]; But then wanted to assign a different RACSignal to enabled, how can I clear any existing one before doing so? If I try and set it a second time, I get an exception like the following: 2013-10-29 16:54:50.623 myApp[3688:c07] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Signal <RACSignal: 0x975e9e0> name: +combineLatest: ( "<RACSignal: 0x975d600> name: <UITextField: 0x10f2c420> -rac_textSignal", "<RACSignal: 0x975de30> name: <UITextField: 0x10f306e0> -rac_textSignal" ) reduce: is already bound to key path "self.loginButton.enabled" on object <LoginViewController: 0x10f264e0>, adding signal <RACSignal: 0x9763500> name: +combineLatest: ( "<RACSignal: 0x97624f0> name: <UITextField: 0x10f2c420> -rac_textSignal", "<RACSignal: 0x97629e0> name: <UITextField: 0x10f306e0> -rac_textSignal" ) reduce: is undefined behavior'

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  • UIButton At Run Time

    - by rami
    I want to create UIButton At Run Time. I Have main view in which I have Table View when I select Row it Open Sub View with Toolbar and in that I Click on Add Button on tool Bar it opens the another view in which I add My value(like name)now when I press save Button It goes back to the sub View with Toolbar and it create button with name which I save and add it in sub view But problem is when I do it again all things done well But The Button Which created previous is not seen in sub view.It display only button with name Which I save Last.

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  • iOS - How to pass information from the VIEW to the Controller?

    - by user1720503
    I am fairly new to programming in general, and have been following the CS193p videos on iTunesU. I am currently doing assignment 3, and am having trouble getting a bit of information from the View sent to the View Controller. I believe I have set up the whole delegation thing correctly, so the question really is to how to get my View Controller to see a bit of information (such as self.bounds.size.width), which is a property that only the View has. Would this involve using self.dataSource? And if so, through what means could I pass this bit of information? Thanks!!

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  • Putting methods in separate files

    - by Garry
    I have a class (MyClass) with a lot of methods. Consequently, the .m file has become quite difficult to read. I'm relatively new to Objective-C (having come from REALbasic) and I was wondering if it's possible to put some of the methods in MyClass into different files and then include them in the class. How would I go about this in Xcode?

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  • Singleton Creation preference

    - by cwieland
    You can create singletons in a variety of ways. I am wondering which is better between these. +(ServerConnection*)shared{ static dispatch_once_t pred=0; __strong static id _sharedObject = nil; dispatch_once(&pred, ^{ _sharedObject = [[self alloc] init]; // or some other init method }); return _sharedObject; } I could see that this compiles down to something very fast. I would think that checking the predicate would be another function call. The other is: +(ServerConnection*)shared{ static ServerConnection* connection=nil; if (connection==nil) { connection=[[ServerConnection alloc] init]; } return connection; } Are there any major differences between the two? I know these are probably similar enough to not worry about it. But Just wondering.

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  • Setting up an independent delegate?

    - by fuzzygoat
    Its common for the dataSource and delegate to be the same object, its also common for this object to be the viewController. In all the info/tutorials that I have seen online delegates are always setup as above. If I wanted to create my own class instead can anyone give me any pointers as to how I might do that. Where does that object get instantiated, how do you connect the dataSource and delegate items etc. I am using UITableView to test this.

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  • How to remove NSDate objects from a NSMutableArray

    - by Ryan
    I have been working with NSArrays and NSMutableArrays that store NSDate objects for a few days now. I noticed that calling [listOfDates removeObject:date1] removes all the NSDate objects from the array. I have instead been doing this to remove objects: NSMutableArray *dateList; // Has Dates in it NSDate *dateToRemove; // Date Object to Remove __block NSUInteger indexToRemove; __block BOOL foundMatch = NO; [dateList enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) { if ([obj isEqualToDate:dateToRemove]) { indexToRemove = idx; foundMatch = YES; *stop = YES; } }]; if (foundMatch) { [dateList removeObjectAtIndex:indexToRemove]; } Is there a better way to be doing this? Perhaps another data structure? Or a simpler function?

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  • Pre-release checklist

    - by bogdansrp
    I built an 10.6+ only app, I tested it in 32-bit and 64-bit mode and everything works (or at least I couldn't find anything wrong). I need help with the actual release build of the app. What settings should I keep an eye out for? Thanks!

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  • Sending NSMutableArray on AsycSocket

    - by user200654
    Any one knows how to write and read NSMutableArray or Dictionary data using AsycSocket Library ? Clarification: I want a way to archive NSMuatbleArray and write this on the stream. seemed pretty forward but running in simulator I get this wierd error [NSKeyedUnarchiver initForReadingWithData:]: incomprehensible archive

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  • UITabBarController for main & about views?

    - by fuzzygoat
    I have two screens on my app that I want to present to users, the first is the main screen and the second is an about screen, brief instructions / credits. Currently I have this setup as a UITabBarController with two buttons and two views. Is this approach acceptable?

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  • iPhone Application

    - by user553627
    Hello, Im working on an iPhone project using xcode and i actually have not programmed using objective-c before. So, my problem mainly is that my app crashes whenever i hit the button that it suppose to show a view of the world map. I think the problem is within the last 2 lines of the code but still i cant figure out why ?!! because whenever i comment out the line "[self presemtM.....]" the program doesn't crash. Would appreciate your help! -(IBAction) pushedGo:(id)sender { CLLocationCoordinate2D coord = {37.331689, -122.030731}; MapViewController *mapView = [[MapViewController alloc] initWithCoordinates:coord andTitle:@"Apple" andSubTitle:@"111"]; [self presentModalViewController:mapView animated:YES] [mapView release]; }

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  • Resized XIB still full size

    - by James
    Building an iPad app. I have a button on my main view that I want to launch a help window. The help window is fairly involved and has its own xib/controller. I resized the help window's XIB and saved it. I instantiated it and added it to the application controller's views as a modal. For some reason this window is still taking up the entire screen. What I really want to do is have a "view" that's maybe 70% of the width and height that lays over the normal view as a modal. How is this accomplished normally? I want it to require that they hit a button to close it. Thanks

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  • Playing a sequence of sounds without gaps (iPhone)

    - by Fiire
    I thought maybe the fastest way was to go with Sound Services. It is quite efficient, but I need to play sounds in a sequence, not overlapped. Therefore I used a callback method to check when the sound has finished. This cycle produces around 0.3 seconds in lag. I know this sounds very strict, but it is basically the main axis of the program. EDIT: I now tried using AVAudioPlayer, but I can't play sounds in a sequence without using audioPlayerDidFinishPlaying since that would put me in the same situation as with the callback method of SoundServices. EDIT2: I think that if I could somehow get to join the parts of the sounds I want to play into a large file, I could get the whole audio file to sound continuously. EDIT3: I thought this would work, but the audio overlaps: waitTime = player.deviceCurrentTime; for (int k = 0; k < [colores count]; k++) { player.currentTime = 0; [player playAtTime:waitTime]; waitTime += player.duration; } Thanks

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  • Problem with cucumber

    - by sev
    I want to make rails app which will require minimum gems. I freeze gems into app and try to run cucumber's test and I've got the an error. Below is sequence of my actions. What I do wrong? rails cucumber && cd cucumber rake rails:freeze:gems add at the end of config/environments/test.rb: config.gem 'gherkin' config.gem 'cucumber-rails' config.gem 'database_cleaner' config.gem 'webrat' rake gems:unpack:dependencies RAILS_ENV=test rake gems:build RAILS_ENV=test rake gems RAILS_ENV=test [F] gherkin [F] trollop = 1.16.2 [F] cucumber-rails [F] cucumber = 0.8.0 [F] gherkin = 1.0.30 [F] trollop = 1.16.2 [F] term-ansicolor = 1.0.4 [F] builder = 2.1.2 [F] diff-lcs = 1.1.2 [F] json_pure = 1.4.3 [F] database_cleaner [F] webrat [F] nokogiri = 1.2.0 [F] rack = 1.0 [F] rack-test = 0.5.3 [F] rack = 1.0 script/generate cucumber rake db:migrate gem uninstall builder cucumber cucumber-rails diff-lcs gherkin json_pure nokogiri rack-test term-ansicolor trollop webrat rake cucumber /usr/bin/ruby1.8 -I "cucumber/vendor/gems/cucumber-0.8.0/lib:lib" "cucumber/vendor/gems/cucumber-0.8.0/bin/cucumber" --profile default /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- gherkin (LoadError) from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in require' from cucumber/vendor/gems/cucumber-0.8.0/bin/../lib/cucumber/cli/main.rb:5 from cucumber/vendor/gems/cucumber-0.8.0/bin/cucumber:5:inrequire' from cucumber/vendor/gems/cucumber-0.8.0/bin/cucumber:5 rake aborted! Command failed with status (1): [/usr/bin/ruby1.8 -I "cucumbe...] (See full trace by running task with --trace)

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  • Newbie, deciding Python or Erlang

    - by Joe
    Hi Guys, I'm a Administrator (unix, Linux and some windows apps such as Exchange) by experience and have never worked on any programming language besides C# and scripting on Bash and lately on powershell. I'm starting out as a service provider and using multiple network/server monitoring tools based on open source (nagios, opennms etc) in order to monitor them. At this moment, being inspired by a design that I came up with, to do more than what is available with the open source at this time, I would like to start programming and test some of these ideas. The requirement is that a server software that captures a stream of data and store them in a database(CouchDB or MongoDB preferably) and the client side (agent installed on a server) would be sending this stream of data on a schedule of every 10 minutes or so. For these two core ideas, I have been reading about Python and Erlang besides ruby. I do plan to use either Amazon or Rackspace where the server platform would run. This gives me the scalability needed when we have more customers with many servers. For that reason alone, I thought Erlang was a better fit(I could be totally wrong, new to this game) and I understand that Erlang has limited support in some ways compared to Ruby or Python. But also I'm totally new to the programming realm of things and any advise would be appreciated grately. Jo

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  • Nested Routes and Parameters for Rails URLs (Best Practice)

    - by viatropos
    Hey there, I have a decent understanding of RESTful urls and all the theory behind not nesting urls, but I'm still not quite sure how this looks in an enterprise application, like something like Amazon, StackOverflow, or Google... Google has urls like this: http://code.google.com/apis/ajax/ http://code.google.com/apis/maps/documentation/staticmaps/ https://www.google.com/calendar/render?tab=mc Amazon like this: http://www.amazon.com/books-used-books-textbooks/b/ref=sa_menu_bo0?ie=UTF8&node=283155&pf_rd_p=328655101&pf_rd_s=left-nav-1&pf_rd_t=101&pf_rd_i=507846&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=1PK4ZKN4YWJJ9B86ANC9 http://www.amazon.com/Ruby-Programming-Language-David-Flanagan/dp/0596516177/ref=sr_1_1?ie=UTF8&s=books&qid=1258755625&sr=1-1 And StackOverflow like this: http://stackoverflow.com/users/169992/viatropos http://stackoverflow.com/questions/tagged/html http://stackoverflow.com/questions/tagged?tagnames=html&sort=newest&pagesize=15 So my question is, what is best practice in terms of creating urls for systems like these? When do you start storing parameters in the url, when don't you? These big companies don't seem to be following the rules so hotly debated in the ruby community (that you should almost never nest URLs for example), so I'm wondering how you go about implementing your own urls in larger scale projects because it seems like the idea of not nesting urls breaks down at anything larger than a blog. Any tips?

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  • Cannot login to Activeadmin after gem update

    - by user1883793
    After bundle update I cannot login to my Activeadmin, here is the log. Is it because the unpermitted params? do I need to config strong parameter to make admin login work? I already have this code for devise: def configure_permitted_parameters devise_parameter_sanitizer.for(:sign_in) { |u| u.permit(:email, :password, :remember_me) } devise_parameter_sanitizer.for(:sign_up) { |u| u.permit(:username, :email, :password) } end Started POST "/admin/login" for 127.0.0.1 at 2013-10-30 22:33:25 +1300 Processing by ActiveAdmin::Devise::SessionsController#create as HTML Parameters: {"utf8"=>"?", "authenticity_token"=>"MhoM/R/oVfad/iiov2zpqfoJ5XOSLda6rTl/V2cMIZE=", "admin_user"=>{"email"=>"[email protected]", "password"=>"[FILTERED]", "remember_me"=>"0"}, "commit"=>"Login"} Completed 401 Unauthorized in 0.6ms Processing by ActiveAdmin::Devise::SessionsController#new as HTML Parameters: {"utf8"=>"?", "authenticity_token"=>"MhoM/R/oVfad/iiov2zpqfoJ5XOSLda6rTl/V2cMIZE=", "admin_user"=>{"email"=>"[email protected]", "password"=>"[FILTERED]", "remember_me"=>"0"}, "commit"=>"Login"} Unpermitted parameters: email, password, remember_me Rendered /home/jcui/.rvm/gems/ruby-1.9.3-p194/gems/activeadmin-0.6.2/app/views/active_admin/devise/shared/_links.erb (0.6ms) Rendered /home/jcui/.rvm/gems/ruby-1.9.3-p194/gems/activeadmin-0.6.2/app/views/active_admin/devise/sessions/new.html.erb within layouts/active_admin_logged_out (118.2ms) Completed 200 OK in 130.7ms (Views: 129.9ms | ActiveRecord: 0.0ms | Solr: 0.0ms)

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  • RubyGems installation errors both when using 'sudo' and not using sudo

    - by Kenny Peng
    I have a machine that is running Ubuntu Hardy, which provides its own RubyGems package. Unfortunately that version of RubyGems (1.1.1) is too old to do anything useful with, so I decided to manually update RubyGems to the current version (1.3.6). That part went smoothly, and if I do gem -v, I get 1.3.6 which is expected. The problem is when I try to do: sudo gem install rack, it returns this error: ERROR: While executing gem ... (Errno::EACCES) Permission denied - /home/username/.gem Usually when I install gems as root, it knows to install it into /usr/lib/ruby/gems, so why is it checking my home directory at all? Another quirk is when I do gem install rack (not as root), it says: ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions into the /usr/lib/ruby/gems/1.8 directory. which is where I want it to go. I've already tried clearing source_caches, trying different versions of RubyGems (1.3.5), forcing installation into /usr/lib with -i to no avail. Any ideas on why RubyGems is so insistent on checking my /home directory when installing as root?

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