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• iPhone - Cannont access to an IBOutlet (nil valued)

  - by Oliver

  Hello, I have a problem acessing a IBOutlet. I have a NIB inside which there is a tableview, a toolbar and an UILabel (encasulated into a view). The controller (that is the file's owner) is defined as : @interface ChoixPeriodeController : UIViewController <UITableViewDelegate> { IBOutlet UILabel* __periodeInitialeLabel; } @property(nonatomic, retain) UILabel* periodeInitialeLabel; - (void) setSelectedPeriode:(Tache_TypePeriode)typePeriode; In the .m file, this function is called by the parent window to init the Label : - (void) setSelectedPeriode:(Tache_TypePeriode)typePeriode { NSMutableString* tmpString = [NSMutableString string]; [tmpString appendFormat:bla bla bla;....]; self.periodeInitialeLabel.text = tmpString; } Into this function, I can see that self.periodeInitialeLabel is at nil. I can't see why ? Everything is connected into IB... Do you see what can be the problem ?

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• Eager load this rails association

  - by dombesz

  Hi, I have rails app which has a list of users. I have different relations between users, for example worked with, friend, preferred. When listing the users i have to decide if the current user can add a specific user to his friends. -if current_user.can_request_friendship_with(user) =add_to_friends(user) -else =remove_from_friends(user) -if current_user.can_request_worked_with(user) =add_to_worked_with(user) -else =remove_from_worked_with(user) The can_request_friendship_with(user) looks like: def can_request_friendship_with(user) !self.eql?(user) && !self.friendships.find_by_friend_id(user) end My problem is that this means in my case 4 query per user. Listing 10 users means 40 query. Could i somehow eager load this?

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• Database Error django

  - by Megan

  DatabaseError at /admin/delmarva/event/ no such column: delmarva_event.eventdate I created a class in my models.py file: from django.db import models from django.contrib.auth.models import User class Event(models.Model): eventname = models.CharField(max_length = 100) eventdate = models.DateField() eventtime = models.TimeField() address = models.CharField(max_length = 200) user = models.ForeignKey(User) def __unicode__(self): return self.eventname and now when i try to view my events in my admin or my main_page it gives me the error that there is no eventdate. I tried syncing the db again but nothing changed. Also, I hashtagged eventdate out to see if I get a different error and then it states that delmarva_event.eventtime does not exist as well. I It is weird because it does not have a problem with eventname. Any suggestions would be greatly appreciated!

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• How do I dynamically update an instance array to hold a list of dynamic methods on instantiation?

  - by Will

  I am trying to dynamically define methods based on xml mappings. This works really well. However I want to create an instance variable that is a array of the dynamically defined methods. My code looks something like this def xml_attr_reader(*args) xml_list = "" args.each do |arg| string_val = "def #{arg}; " + " xml_mapping.#{arg}; " + "end; " self.class_eval string_val xml_hash = xml_list + "'#{arg}'," end self.class_eval "@xml_attributes = [] if @xml_attributes.nil?;" + "@xml_attributes = @xml_attributes + [#{xml_list}];" + "puts 'xml_attrs = ' + @xml_attributes.to_s;" + "def xml_attributes;" + " puts 'xml_attrs = ' + @xml_attributes.to_s;" + " @xml_attributes;" + "end" end So everything works except when I call xml_attributes on an instance it return null (and prints out 'xml_attrs = '). While the puts before the definition actually prints out the correct array. (when I instantiate the instance)

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• Is there a memory leak here?

  - by TheLearner

  Please see my comments in code: -(id)initWithCoordinate:(CLLocationCoordinate2D)c title:(NSString *)t { [super init]; coordinate = c; NSDate *today = [NSDate date]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateStyle:NSDateFormatterLongStyle]; NSString* formattedDate = [NSString stringWithFormat:@"%@ %@", [dateFormatter stringFromDate:today], t]; [self setTitle:formattedDate]; //Why does the app crash when I try and release formattedDate? I have after all passed its reference to the title property? [dateFormatter release]; //I need to release the dateformatter because I have finished using it and I have not passed on a reference to it return self; }

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• Ads in whole app iPhone problem

  - by lars

  I am using mobclix together with admob. The code is to big to add it in all classes. So i created a new class: Ads Everytime i want an ad in a view, i have to send the view to the ad class: - (void)initAd:(UIView *) pView { NSLog(@"ads init"); self.loadedView = pView; ..... To create an ad in a class: Ad* ad = [Ads new]; [ad initAd:self.view]; I dont know if thats the right way. I have to create a new Ads object everytime i change a view (or class). Is there a way to always have an Ads instance running, or is there another better way? Thanks alot!!

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• How to manage orientation in iPad app

  - by Annie

  I have added a image on navigationcontroller in appdelagte class. and set yes in - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { loginViewController = [[LoginViewController alloc]initWithNibName:@"LoginViewController" bundle:nil]; [self.window addSubview:_navController.view]; _navController.navigationBarHidden = NO; navimage = [[UIImageView alloc] init]; navimage.frame = CGRectMake(300, 18, 177, 47); navimage.image = [UIImage imageNamed: @"logo.png"]; [_navController.view addSubview:navimage]; [self.window makeKeyAndVisible]; return YES; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{ return YES; } But navigation image position is not changing. The frame remains same in both modes. Please give me idea how it will be solved in the case of navigation controller image.

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• UIView animation does not animate at first try?

  - by Bacalso Vincent

  Considering that my _palette's frame is like this: _palette.frame = CGRectMake(0,480,320,200); I have this code here to slide up/down a UIView: if(![_pallete superview]) { [self.view addSubview:_pallete]; [self.view insertSubview:_tempViewPaletteListener belowSubview:_pallete]; [UIView animateWithDuration:0.3 animations:^{ _pallete.top -= kPaletteHeight; } completion:^(BOOL isFinished) { }]; } else { [UIView animateWithDuration:0.3 animations:^{ _pallete.top += kPaletteHeight; } completion:^(BOOL isFinished) { [_tempViewPaletteListener removeFromSuperview]; [_pallete removeFromSuperview]; }]; } *the _tempViewPaletteListener is just a view with a tap gesture use to dismiss the palette* The problem is when I first try to run code here, the _palette view will just stiffly display right away. What I expected is, it should slide up the _palette view. Though it works fine after the first try

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• NSOperationqueue i want to block main thread

  - by alexeyndru

  i want to block the main thread until something else is done in the background. i used: result=[self performSelectorInBackground:@selector(calculate:) withObject:expression]; just bellow this line I am using result: [self use:result]; i dont want to use result until it is available. to achieve this I implemented calculate: { [[(AppDelegate *)[[UIApplication sharedApplication] delegate] queue] waitUntilAllOperationsAreFinished]; calculating result... } and still, the result is used before it is calculated. so, i didnt block the main thread. pls help me do that. thanks

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• Zend Framework multiple databases

  - by Uffo

  I'm currently using only one database with Zend Framework, but now I have to add ONE MORE. I'm using this code right now: public static function setupDatabase() { $config = self::$registry->configuration; $db = Zend_Db::factory($config->db->adapter, $config->db->toArray()); $db->query("SET NAMES 'utf8'"); self::$registry->database = $db; Zend_Db_Table::setDefaultAdapter($db); } What code do I need to write in order to use ONE MORE database; and how I will reference it, when I need to make some queries or so.. Best Regards!

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• Error 500 on template.render() with jinja2

  - by Asperitas

  I am working on playing with some Python to create a webapp. At first I put the HTML in a string, using %s to fill certain elements. That all worked perfectly. Now I want to put the HTML in a template, so I followed this tutorial. My code looks like this (I deleted irrelevant code for this error): import codecs import cgi import os import jinja2 jinja_environment = jinja2.Environment(loader=jinja2.FileSystemLoader(os.path.join(os.path.dirname(__file__)))) class Rot13Handler(webapp2.RequestHandler): def get(self): template = jinja_environment.get_template('rot13.html') self.response.out.write(template.render({'text': ''})) When I replace just template.render({'text': ''}) a random string, the program works fine. I did add the latest jinja2 library to my app.yaml, and naturally my rot13.html does exist with the {{ text }} added. So could anyone please help me in the right direction? I don't know why it's going wrong.

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• Rails table inheritance issue

  - by Tristan O'Neil

  I've setup some models in the table inheritance fashion and everything seems to be all fine and dandy. But, when I use a collection select field to select values from one of the models it saves it but it saves the ID of the data and not the actual value of the data. So when I try to display the value on the show view it just shows the corresponding ID and not the actual value. Here is my setup. I'm using formtastic as a side note. View <%= show_field "County", @company.county %> Form <%= f.input :county, :label => 'County', :as => :select, :collection => County.find(:all) %> Base Model class Tag < ActiveRecord::Base before_create :set_type before_update :set_type attr_accessible :type, :name, :category belongs_to :company def set_type self.type = self.category end end Inherited Model class County < Tag end

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• Custom nib UITableViewCell height

  - by Chuck

  I've created a custom UITableViewCell in IB, linked it to the root view controller's property for it, and set it up in CellForRowAtIndexPath. But the height of my drawn cells doesn't match what I setup in IB, advice? Here's some screenshots and the code. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *AddressCellIdentifier = @"AddressCellIdent"; UITableViewCell *thisCell = [tableView dequeueReusableCellWithIdentifier:AddressCellIdentifier]; if (thisCell == nil) { [[NSBundle mainBundle] loadNibNamed:@"AddressCell" owner:self options:nil]; thisCell = addressCell; self.addressCell = nil; } return thisCell ; } addressCell is a @property (nonatomic, assign) IBOutlet UITableViewCell *addressCell;, and is linked up in IB to the file's owner (the table view controller). I'm using the example from Apple's table view programming guide.

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• Performselector not call in NSThread

  - by abdulsamad

  Hi all, I have a problem that i want to call a function when one of my functions that is running into a seperate thread comes to an end. its like that [NSThread detachNewThreadSelector:@selector(fetchFeaturedFreeApps) toTarget:self withObject:nil]; here is my fetchFeaturedFreeApps function -(void)fetchFeaturedFreeApps { ////all my code [self performSelector:@selector(closeView) withObject:nil afterDelay:4.0]; } My problem is that the close view methods doesnt run after the 4 seconds. Hoew if i call the fetchFeaturedFreeApps method with perform selector then my closeview metod is called properly. Your valuable help is highly appreciated.

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• OpenSSL compatible API for Scala?

  - by pfleidi

  Hello, I'm working on a project with a friend. He's implementing his software in Ruby and I'm doing my stuff in Scala (with Lift). We're using some asynchronous encryption and he is using the ruby OpenSSL bindings for that: key = OpenSSL::PKey::RSA.generate(4096) self.public_key = key.public_key self.private_key = key What I'm looking for is a simple API which is compatible to OpenSSL and runs on the JVM. I need it to create key-pairs and to encrypt and sign our payload. Do you have any suggestions?

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• Custom setter methods in Core-Data

  - by andrewebling

  I need to write a custom setter method for a field (we'll call it foo) in my subclass of NSManagedObject. foo is defined in the data model and Xcode has autogenerated @property and @dynamic fields in the .h and .m files respectively. If I write my setter like this: - (void)setFoo: (NSObject *)inFoo { [super setFoo: inFoo]; [self updateStuff]; } then I get a compiler warning on the call to super. Alternatively, if I do this: - (void)setFoo: (NSObject *)inFoo { [super setValue: inFoo forKey: inFoo]; [self updateStuff]; } then I end up in an infinite loop. So what's the correct approach to write a custom setter for a subclass of NSManagedObject?

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• How to find why NSMutableData is invalid

  - by 4thSpace

  I access a RESTFUL url and get back results. The results are in JSON. I turn the response into a string via: - (void)connectionDidFinishLoading:(NSURLConnection *)connection { NSString *json = [[NSString alloc] initWithBytes:[self.receivedData mutableBytes] length:[self.receivedData length] encoding:NSUTF8StringEncoding]; The json variable has a value of 0x0. When I mouse over it, I see <Invalid CFStringRef. How can I debug this to tell why it is invalid? I render the JSON given back through the browser in A JSON parser. That checks out fine. Results are given back by entering an ID in the URL. Other IDs return results without issue. The result set is fairly large.

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• Problems using the Razor model when creating my knockout ViewModel

  - by Emil Kantis

  I'm having problems with using the Model in a javascript call when setting up my knockout VM.. @model List<AdminGui.Models.Domain> <script src="http://ajax.aspnetcdn.com/ajax/knockout/knockout-2.2.1.js" type="text/javascript"></script> <script type="text/javascript"> function ViewModel() { var self = this; self.domains = ko.observableArray( ko.utils.arrayMap(@Model, function(item) { return new Domain(item.guid, item.description, item.namespaces); })); } I get a syntax error on @Model in the ko.utils.arrayMap call. I suspect it might be my Razor-fu that is lacking... :)

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• Set text equal to string and pass to receipt printer at a different size on iOS

  - by Max Roper

  I am using the StarIO SDK to print text to a receipt printer and I am trying to get a certain line of text larger than the rest. I have some help from their support but I can't really get it to go. -(void)print{ NSMutableString *final=[NSMutableString stringWithFormat:@"-----"]; [final appendFormat:@"\n\nLevel:%@ Section:%@ Row:%@ Seat:%@", [response_dict objectForKey:@"level"], [response_dict objectForKey:@"section"],[response_dict objectForKey:@"row"],[response_dict objectForKey:@"seat"]]; There is a bunch of other stuff that is printing, but that is the line that I would like to be a different size than the rest. The StarIO support said that I should try and pass that to this... -(IBAction)PrintText { NSString *portName = [IOS_SDKViewController getPortName]; NSString *portSettings = [IOS_SDKViewController getPortSettings]; [PrinterFunctions PrintTextWithPortname:portName portSettings:portSettings heightExpansion:heightExpansion widthExpansion:widthExpansion textData:textData textDataSize:[textNSData length]]; free(textData); } Would love some help if possible. :) Thanks so much. This is the main bit I think I would need from the StarIO Text formatting doc... - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { array_hieghtExpansion = [[NSMutableArray alloc] init]; [array_hieghtExpansion addObject:@"1"]; [array_hieghtExpansion addObject:@"2"]; [array_hieghtExpansion addObject:@"3"]; [array_hieghtExpansion addObject:@"4"]; [array_hieghtExpansion addObject:@"5"]; [array_hieghtExpansion addObject:@"6"]; array_widthExpansion = [[NSMutableArray alloc] init]; [array_widthExpansion addObject:@"1"]; [array_widthExpansion addObject:@"2"]; [array_widthExpansion addObject:@"3"]; [array_widthExpansion addObject:@"4"]; [array_widthExpansion addObject:@"5"]; [array_widthExpansion addObject:@"6"]; array_alignment = [[NSMutableArray alloc] init]; [array_alignment addObject:@"Left"]; [array_alignment addObject:@"Center"]; [array_alignment addObject:@"Right"]; } return self; } and int heightExpansion = [pickerpopup_heightExpansion getSelectedIndex]; int widthExpansion = [pickerpopup_widthExpansion getSelectedIndex];

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• Added a tableview in a viewcontroller. How do I load tableview cells

  - by user1509593

  I have a view controller In storyboard, added tableview to view controller. Created an IBOutlet for tableview to View controller's header file. The view controller's header file includes an resultsarray Changed the @interface to include delegates <\UITableViewDelegate, UITableViewDataSource View controller implementation file has mandatory tableview protocols (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath The view controller has search button in storyboard and IBAction in view controller header file. On click of search button, results are obtained. How do I load the array and redisplay tableview with results in search method. After I loaded the results in array, I tried [self viewdidload];, hoping the cells will be loaded. But didn't. I thought of calling [self.detailView cellForRowAtIndexPath:?indexpath], but dontknow what the value of index path is. Appreciate help from guru's to load the UItableviewcell Thanks

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• how can i set mTextView to show on button click

  - by Ajay Pandey

  i have a UITextView object which i have created in interface builder with it's hidden property unmarked.Now i want this textView to be invisible when my application launches and first view appears.Further i want it to be displayed when a particular method is called.Now this is what i have written in view did load [mTextView setHidden:YES]; self.mTextView=[[UITextView alloc] init]; it hides the textView ats the first view appears but when my desired method is called and i write [mTextView setHidden:NO]; it does not show it again.. Is it like we cant change the appearance of a textView once it is assigned because after assigning memory as self.mTextView=[[UITextView alloc] init]; and then writing [mTextView setHidden:YES]; it does not hide textView in viwDidLoad either.....

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• What's the preferred way to use helper methods in Ruby?

  - by DR

  Disclaimer: Although I'm asking in context of a Rails application, I'm not talking about Rails helpers (i.e. view helpers) Let's say I have a helper method/function: def dispatch_job(job = {}) #Do something end Now I want to use this from several places (mostly controllers, but also a few BackgrounDRb workers) What's the preferred way to do this? I can think of two possibilities: 1. Use a class and make the helper a static method: class MyHelper def self.dispatch_job(job = {}) end end class MyWorker def run MyHelper.dispatch_job(...) end end 2. Use a module and include the method into whatever class I need this functionality module MyHelper def self.dispatch_job(job = {}) end end class MyWorker include MyHelper def run dispatch_job(...) end end 3. Other possibilities I don't know yet ... The first one is more Java-like, but I'm not sure if the second one is really an appropriate use of Ruby's modules.

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• optimize python code

  - by user283405

  i have code that uses BeautifulSoup library for parsing. But it is very slow. The code is written in such a way that threads cannot be used. Can anyone help me about this? I am using beautifulsoup library for parsing and than save in DB. if i comment the save statement, than still it takes time so there is no problem with database. def parse(self,text): soup = BeautifulSoup(text) arr = soup.findAll('tbody') for i in range(0,len(arr)-1): data=Data() soup2 = BeautifulSoup(str(arr[i])) arr2 = soup2.findAll('td') c=0 for j in arr2: if str(j).find("<a href=") > 0: data.sourceURL = self.getAttributeValue(str(j),'<a href="') else: if c == 2: data.Hits=j.renderContents() #and few others... #... c = c+1 data.save() Any suggestions? Note: I already ask this question here but that was closed due to incomplete information.

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• Correct way to add "Tab Bar" in Navigation based tamplate in iPhon

  - by iPhoneDev

  I have added Tab Bar in Navigation based tamplate like this: [self.navigationController pushViewController:anotherViewController animated:YES]; And I think this is not the correct way to have Tab Bar in detail view in Navigation based tamplate. Please make me correct? UnsentView *unsent = [[UnsentView alloc] initWithNibName:@"UnsentView" bundle:nil]; unsent.title =@"Unsent"; UITabBarController *anotherViewController = [[UITabBarController alloc] init]; anotherViewController.viewControllers = [NSArray arrayWithObjects: unsent, setting, nil]; [self.navigationController pushViewController:anotherViewController animated:YES]; [anotherViewController release];

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• How to make pytest display a custom string representation for fixture parameters?

  - by Björn Pollex

  When using builtin types as fixture parameters, pytest prints out the value of the parameters in the test report. For example: @fixture(params=['hello', 'world'] def data(request): return request.param def test_something(data): pass Running this with py.test --verbose will print something like: test_example.py:7: test_something[hello] PASSED test_example.py:7: test_something[world] PASSED Note that the value of the parameter is printed in square brackets after the test name. Now, when using an object of a user-defined class as parameter, like so: class Param(object): def __init__(self, text): self.text = text @fixture(params=[Param('hello'), Param('world')] def data(request): return request.param def test_something(data): pass pytest will simply enumerate the number of values (p0, p1, etc.): test_example.py:7: test_something[p0] PASSED test_example.py:7: test_something[p1] PASSED This behavior does not change even when the user-defined class provides custom __str__ and __repr__ implementations. Is there any way to make pytest display something more useful than just p0 here? I am using pytest 2.5.2 on Python 2.7.6 on Windows 7.

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