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  • Push/Present Modal View Controller

    - by Yakattak
    I have a table in my view controller (let's call it TVC1). I have rows in TVC1 that are used so the user can input some more data in addition to the data on TVC1. So, when someone taps a specific row in TVC1, it will show another view controller (let's call it TVC2). However, when TVC2 is shown, all of the data in TVC1 is cleared. How can I save the data in TVC1? Should I do it through the app delegate? DescriptionInputViewController *descriptionController = [[DescriptionInputViewController alloc] initWithNibName:@"DescriptionInputView" bundle:nil]; [self presentModalViewController:navController animated:YES]; [self.navigationController pushViewController:descriptionController animated:YES]; [descriptionController release];

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  • To static or not to static

    - by Idsa
    I really like to use static methods (especially for helpers classes). But as static methods are not stubbable, eventually they are a bad practice, aren't they? So I have to choose between static methods usage convenience and testability. Is there any compromise?

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  • Can NSDictionary be used with TableView on iPhone?

    - by bobo
    In a UITableViewController subclass, there are some methods that need to be implemented in order to load the data and handle the row selection event: - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; //there is only one section needed for my table view } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [myList count]; //myList is a NSDictionary already populated in viewDidLoad method } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease ]; } // indexPath.row returns an integer index, // but myList uses keys that are not integer, // I don't know how I can retrieve the value and assign it to the cell.textLabel.text return cell; } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // Handle row on select event, // but indexPath.row only returns the index, // not a key of the myList NSDictionary, // this prevents me from knowing which row is selected } How is NSDictionary supposed to work with TableView? What is the simplest way to get this done?

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  • AVAudioPlayer not looping

    - by Nick
    Hey guys, I have this code: - (id<SelfReleasingSound>) initWithFilepath: (NSString *) filepath { self = [super init]; if(self != nil){ NSData * soundFileData = [NSData dataWithContentsOfFile: filepath]; NSError * error; player = [[AVAudioPlayer alloc] initWithData: soundFileData error: &error]; if(error != nil){ JNLogAlert(@"Failed to load sound(%@)", filepath); } volume = 1.0; loops = 0; player.volume = volume; player.numberOfLoops = loops; [player prepareToPlay]; } return self; } - (void) play { player.numberOfLoops = loops; JNLogString(@"PLAYING: %D LOOPS", player.numberOfLoops); [player play]; } JNLogString is a wrapper for NSLog, and while my program says this: 2010-03-24 03:39:40.882 Bubbleeh[50766:207] JNSoundFile.m:40 PLAYING: 5 LOOPS It actually only plays 1 time, as if numberOfLoops were 0. Am I doing something wrong? Thanks in advance,

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  • UIMenuController Custom Items

    - by Joshua
    I have created a UIMenuController and have set it a custom menu item like so: UIMenuController *menuController = [UIMenuController sharedMenuController]; UIMenuItem *item1 = [[UIMenuItem alloc] initWithTitle:@"Do This" action:@selector(item1)]; [menuController setMenuItems:[NSArray arrayWithObject:item1]]; But I wanted that object to be the only one to appear so I added this code: - (BOOL)canPerformAction: (SEL)action withSender: (id)sender { BOOL answer = NO; if (action == @selector(item1)) answer = YES; return answer; } The problem is it still shows other## Heading ## items, such as "Select", "Select All" and "Paste". This may have something to do with this being displayed in a UITextView. But how do I stop if from displaying all other items?

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  • Editing Mac OS X login items in Objective-C through AppleScript

    - by mon4goos
    In my Cocoa program, I want to examine what programs are registered to run at startup and modify that list as I feel appropriate. In order to be compatible with Tiger it seems like I need to work through AppleScript. I currently have the following code: NSDictionary* errorDict; NSAppleEventDescriptor* returnDescriptor = NULL; NSString *appleSource = @"tell application \"System Events\"\n\ get every login item\n\ end tell"; NSAppleScript *appleScript = [[NSAppleScript alloc] initWithSource: appleSource]; returnDescriptor = [appleScript executeAndReturnError: &errorDict]; If I run that command in AppleScript, I get back an array of login items. However, I can't figure out how to iterate through this array in Objective-C. More specifically, I want to examine the names and paths of the programs registered to run at startup. Any ideas?

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  • Filter chain halted as [:login_required] rendered_or_redirected

    - by Magicked
    Hopefully I can explain this well enough, but please let me know if more information is needed! I'm building a form where a user can create an "incident". This incident has the following relationships: belongs_to: customer (customer has_many incidents) belongs_to: user (user has_many incidents) has_one: incident_status (incident_status belongs to incident) The form allows the user to assign the incident to a user (select form) and then select an incident status. The incident is nested in customer. However, I'm getting the following in the server logs: Processing IncidentsController#create (for 127.0.0.1 at 2010-04-26 10:41:33) [POST] Parameters: {"commit"=>"Create", "action"=>"create", "authenticity_token"=>"YhW++vd/dnLoNV/DSl1DULcaWq/RwP7jvLOVx9jQblA=", "customer_id"=>"4", "controller"=>"incidents", "incident"=>{"title"=>"Some Bad Incident", "incident_status_id"=>"1", "user_id"=>"2", "other_name"=>"SS01-042310-001"}} User Load (0.3ms) SELECT * FROM "users" WHERE ("users"."id" = 2) LIMIT 1 Redirected to http://localhost:3000/session/new Filter chain halted as [:login_required] rendered_or_redirected. Completed in 55ms (DB: 0) | 302 Found [http://localhost/customers/4/incidents] It looks to me like it's trying to gather information about the user, even though it already has the id (which is all it needs to create the incident), and the user may not have permission to do a select statement like that? I'm rather confused. Here is the relevant (I think) information in the Incident controller. before_filter :login_required, :get_customer def new @incident = @customer.incidents.build @users = @customer.users @statuses = IncidentStatus.find(:all) respond_to do |format| format.html # new.html.erb format.xml { render :xml => @incident } end end def create @incident = @customer.incidents.build(params[:incident]) respond_to do |format| if @incident.save flash[:notice] = 'Incident was successfully created.' format.html { redirect_to(@incident) } format.xml { render :xml => @incident, :status => :created, :location => @incident } else format.html { render :action => "new" } format.xml { render :xml => @incident.errors, :status => :unprocessable_entity } end end end Just as an FYI, I am using the restful_authentication plugin. So in summary, when I submit the incident creation form, it does not save the incident because it halts. I'm still very new to rails, so my skill at diagnosing problems like this is still very bad. I'm going in circles. :) Thanks in advance for any help. Please let me know if more information is needed and I'll edit it in!

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  • Animation on the iPhone - use image sequence or rotation?

    - by user157733
    I am creating a basic animation for my iPhone app. I have a choice to make between 2 different types of animation. I can use this... NSArray *myImages = [NSArray arrayWithObjects: [UIImage imageNamed:@"myImage1.png"], [UIImage imageNamed:@"myImage2.png"], [UIImage imageNamed:@"myImage3.png"], [UIImage imageNamed:@"myImage4.gif"], nil]; UIImageView *myAnimatedView = [UIImageView alloc]; [myAnimatedView initWithFrame:[self bounds]]; myAnimatedView.animationImages = myImages; myAnimatedView.animationDuration = 0.25; [self addSubview:myAnimatedView]; [myAnimatedView release]; or something like this... [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:1.5]; // other animations goes here myImage.transform = CGAffineTransformMakeRotation(M_PI*0.5); // other animations goes here [UIView commitAnimations]; I have quite a few of these parts to animate so I want to choose an option which uses the least amount of memory and runds the quickest. Any advice would be great, thanks

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  • Why isn't my query using any indices when I use a subquery?

    - by sfussenegger
    I have the following tables (removed columns that aren't used for my examples): CREATE TABLE `person` ( `id` int(11) NOT NULL, `name` varchar(1024) NOT NULL, `sortname` varchar(1024) NOT NULL, PRIMARY KEY (`id`), KEY `sortname` (`sortname`(255)), KEY `name` (`name`(255)) ); CREATE TABLE `personalias` ( `id` int(11) NOT NULL, `person` int(11) NOT NULL, `name` varchar(1024) NOT NULL, PRIMARY KEY (`id`), KEY `person` (`person`), KEY `name` (`name`(255)) ) Currently, I'm using this query which works just fine: select p.* from person p where name = 'John Mayer' or sortname = 'John Mayer'; mysql> explain select p.* from person p where name = 'John Mayer' or sortname = 'John Mayer'; +----+-------------+-------+-------------+---------------+---------------+---------+------+------+----------------------------------------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-------+-------------+---------------+---------------+---------+------+------+----------------------------------------------+ | 1 | SIMPLE | p | index_merge | name,sortname | name,sortname | 767,767 | NULL | 3 | Using sort_union(name,sortname); Using where | +----+-------------+-------+-------------+---------------+---------------+---------+------+------+----------------------------------------------+ 1 row in set (0.00 sec) Now I'd like to extend this query to also consider aliases. First, I've tried using a join: select p.* from person p join personalias a where p.name = 'John Mayer' or p.sortname = 'John Mayer' or a.name = 'John Mayer'; mysql> explain select p.* from person p join personalias a on p.id = a.person where p.name = 'John Mayer' or p.sortname = 'John Mayer' or a.name = 'John Mayer'; +----+-------------+-------+--------+-----------------------+---------+---------+-------------------+-------+-----------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+-------------+-------+--------+-----------------------+---------+---------+-------------------+-------+-----------------+ | 1 | SIMPLE | a | ALL | ref,name | NULL | NULL | NULL | 87401 | Using temporary | | 1 | SIMPLE | p | eq_ref | PRIMARY,name,sortname | PRIMARY | 4 | musicbrainz.a.ref | 1 | Using where | +----+-------------+-------+--------+-----------------------+---------+---------+-------------------+-------+-----------------+ 2 rows in set (0.00 sec) This looks bad: no index, 87401 rows, using temporary. Using temporary only appears when I use distinct, but as an alias might be the same as the name, I can't really get rid of it. Next, I've tried to replace the join with a subquery: select p.* from person p where p.name = 'John Mayer' or p.sortname = 'John Mayer' or p.id in (select person from personalias a where a.name = 'John Mayer'); mysql> explain select p.* from person p where p.name = 'John Mayer' or p.sortname = 'John Mayer' or p.id in (select id from personalias a where a.name = 'John Mayer'); +----+--------------------+-------+----------------+------------------+--------+---------+------+--------+-------------+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | +----+--------------------+-------+----------------+------------------+--------+---------+------+--------+-------------+ | 1 | PRIMARY | p | ALL | name,sortname | NULL | NULL | NULL | 540309 | Using where | | 2 | DEPENDENT SUBQUERY | a | index_subquery | person,name | person | 4 | func | 1 | Using where | +----+--------------------+-------+----------------+------------------+--------+---------+------+--------+-------------+ 2 rows in set (0.00 sec) Again, this looks pretty bad: no index, 540309 rows. Interestingly, both queries (select p.* from person ... or p.id in (4711,12345) and select id from personalias a where a.name = 'John Mayer') work extremely well. Why doesn't MySQL use any indices for both of my queries? What else could I do? Currently, it looks best to fetch person.ids for aliases and add them statically as an in(...) to the second query. There certainly has to be another way to do this with a single query. I'm currently out of ideas though. Could I somehow force MySQL into using another (better) query plan?

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  • Preparing a Universal App for iPhone SDK 3.2

    - by user133611
    Hi all, I am working on a universal app, I used UISplitViewController in doing iPad application. I followed the Universal app guidelines i.e, i keep base SDK as 3.2, iPhone Target OS ad iPhone OS 3.1.3, Taget device as iPhone/iPad. And i used "Adding Runtime Checks for Newer Symbols" for UISplitViewController and UIPopOverController. Class splitVCClass = NSClassFromString(@"UISplitViewController"); if (splitVC) { UISplitViewController* mySplitViewController = [[splitVCClass alloc] init]; // Configure the split view controller. } I used this in .m files I declared UIPopOverController in .h files also "dyld: Symbol not found: _OBJC_CLASS_$_UIPopoverController Referenced from: /var/mobile/Applications/9E0CE75F-D2A9-4132-AE56-1780928BCF21/UniversalTasks.app/UniversalTasks Expected in: /System/Library/Frameworks/UIKit.framework/UIKit in /var/mobile/Applications/9E0CE75F-D2A9-4132-AE56-1780928BCF21/UniversalTasks.app/UniversalTasks" What i have to do can any one help me out

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  • .Net concurrency performance on client side

    - by Yaron Naveh
    I am writing a client side .Net application which is expected to use a lot of threads. I was warned that .Net performance is very bad when it comes to concurrency. While I am not writing a real-time application, I want to make sure my application is scalable (i.e. allows many threads) and somehow comparable to an equivalent cpp application. Anyone can share his experience? Anyone can refer me to a relevant benchmark?

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  • Changing color of the titlebar, background and text of MFMailComposeViewController

    - by iSharreth
    I am sending email from my iPhone application. Everything working fine, but I want to change the color of the title bar that appears from blue to black and the background color from white to black. Also, all the text to white color. What should I do? Anyone please help! I used the below code: (IBAction)sendMail{ MFMailComposeViewController *mailComposer = [[MFMailComposeViewController alloc]init]; mailComposer.mailComposeDelegate = self; if([MFMailComposeViewController canSendMail]){ [mailComposer setToRecipients: [NSArray arrayWithObjects:@"[email protected]",nil]]; [mailComposer setSubject: nil]; [mailComposer setMessageBody: nil isHTML:NO]; [self presentModalViewController:mailComposer animated: YES]; }

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  • iPhone app memory leak

    - by Marian Busoi
    Any idea why this code gives me a memory leak? As you can see, I'm running out of ideas as to what I can do to stop it. (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; NSArray *allSketches = [project.sketches allObjects]; NSMutableArray *temp = [[NSMutableArray alloc] initWithArray:allSketches]; if(sketchesArray != nil) [sketchesArray release]; [self setSketchesArray:temp]; [allSketches release]; allSketches = nil; [temp release]; temp = nil; } I also release sketchesArray inside viewDidDissapear. I'm not using viewDidLoad and dealloc to init/release these objects as what I am doing requires me to use viewWillAppear and viewDidDissapear. Thanks

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  • New line and returns ignored in setMessageBody

    - by Magic Bullet Dave
    Am I doing something dumb? I can pre-fill and email ok but the "\r\n" is ignored in the emailBody: - (void) sendEventInEmail { MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init]; picker.mailComposeDelegate = self; NSString *emailSubject = [eventDictionary objectForKey:EVENT_NAME_KEY]; [picker setSubject:emailSubject]; // Fill out the email body text NSString *iTunesLink = @"http://itunes.apple.com/gb/app/whats-on-reading/id347859140?mt=8"; // Link to iTune App link NSString *content = [eventDictionary objectForKey:@"Description"]; NSString *emailBody = [NSString stringWithFormat:@"%@\r\nSent using <a href = '%@'>What's On Reading</a> for the iPhone.", content, iTunesLink]; [picker setMessageBody:emailBody isHTML:YES]; picker.navigationBar.barStyle = UIBarStyleBlack; [self presentModalViewController:picker animated:YES]; [picker release]; } Regards Dave

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  • Testing MPMoviePlayerViewController in iPad simulator

    - by hgpc
    I have a view that shows a MPMoviePlayerViewController modally. When testing it in the iPad simulator it works well on the first try. If I dismiss the video and then show the view again, the player only plays the audio, but not the video. Is this a simulator quirk or am I doing something wrong? Here's my code: - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; MPMoviePlayerViewController* v = [[MPMoviePlayerViewController alloc] initWithContentURL:url]; [[NSNotificationCenter defaultCenter] addObserver:self selector: @selector(playbackDidFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:v.moviePlayer]; [self presentMoviePlayerViewControllerAnimated:v]; [v release]; } -(void) playbackDidFinish:(NSNotification*)aNotification { MPMoviePlayerController *player = [aNotification object]; [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:player]; [player stop]; [self dismissMoviePlayerViewControllerAnimated]; }

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  • how can I translate a NSString to NSData? And the data has the same content as the string

    - by someonemaybe
    NSString * theString=@"e88d"; NSData * data; // something I should implement NSLog(@"%@", theString); NSLog(@"%@",[data description]); I want the results of the two printings are the same. AES encryption and decryption: (1).The server: if the plaintext is :@"abcd"; the AES encrypted data(NSData data type) is :"d882830c dc892036 4345839f 13c7516a"; (2).in my local app, my code is : NSData*data=[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://..."]]; NSString * mystring= [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; However, to decrypt data successfully, I must got a data(NSData date type) which equals to "d882830c dc892036 4345839f 13c7516a".But it is the mystring (NSString data type) not the data(NSData data type) that equals to the right value. the encryption and decryption function both need a data(NSData data type) as input datas. (NSData*)AES128EncryptWithKey:(NSString*)key; (NSData*)AES128DecryptWithKey:(NSString*)key;

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  • queston related to popToViewController

    - by user217572
    My Secondview is BController *bview. now in this view there is 1 back button on click of that back button -(IBAction)done:(id)sender { AController *aview= [[AController alloc] initWithNibName:@"AController" bundle:[NSBundle mainBundle]]; NSArray *array = [self.navigationController popToViewController: aview animated:YES]; } AController *aview is nothing but my first view or u can say first view but in click of back button i'm getting exception ** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Tried to pop to a view controller that doesn't exist.' 2010-03-18 15:53:05.948 IChitMe[5072:207] Stack: ( 820145437, 837578260, 819694387, 814928571, 862794500, 862794216, 54911, 819902607, 861951876, 862404412, 819902607, 861951876, 861951724, 861951668, 861950732, 861953932, 861948160, 861945748, 861927312, 861925524, 858687888, 819893547, 819891231, 858682228, 861592624, 861585968, 10069, 9964 ) terminate called after throwing an instance of 'NSException'

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  • OCmock and MKReverseGeocoder

    - by user315374
    Hi, I would like to test a method that uses reverse Geocoding. What i would like to do is : set the geocoder as a property of my controller create the geocoder in the init method call the geocoder in the method i want to test replace the geocoder with a mock in my test The problem is that the MKReverseGeocoder coordinate property is read only, i can only set it in the constructor method : [[MKReverseGeocoder alloc] initWithCoordinate:coord] And of course the coordinates are only available in the method i want to test.. Does anyone knows how i could mock the MKReverseGeocoder class ? Thanks in advance, Vincent.

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  • Is it ethical to let users see the request headers from visitors to a url shortening service?

    - by soniiic
    I'm currently in the progress of making a url shortening service that will let the creator see the http request headers that the browser has made when visitors visit the url. The visitors won't be made aware that they are being tracked, but obviously nothing is personally identifiable. Is there anything I should be made aware of ethically or legally that makes this a bad idea?

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  • NSArrays in NSArrays. A pointer problem?

    - by RyJ
    I believe my problem involves pointers, a concept I often struggle with, but here's what I'm trying to do. I have six NSArrays. I want an additional NSArray comprised of these six arrays, so: self.arr1 = [NSArray array]; self.arr2 = [NSArray array]; self.arr3 = [NSArray array]; self.arr4 = [NSArray array]; self.arr5 = [NSArray array]; self.arr6 = [NSArray array]; NSArray *containerArray = [[NSArray alloc] initWithObjects:self.arr1, ... etc, nil]; Whenever I update one of the first 6 NSArrays, I want the object updated in containerArray. (I know I'm using an NSArray and not an NSMutableArray, when I update the arrays I create a new one and assign it to the instance variable). Currently, any manipulation of arr1 is not reflected in [containerArray objectAtIndex:0].

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  • Can I push a modal view controller from within another modal view controller?

    - by Andy
    I've got a rootViewController that, at one point, displays a peoplePickerNavigationController. I'm trying to push a second view controller when my user selects a specific contact property, like so: -(BOOL)peoplePickerNavigationController:(ABPeoplePickerNavigationController *)picker shouldContinueAfterSelectingPerson:(ABPersonRef)person property:(ABPropertyID)property identifier:(ABMultiValueIdentifier)identifier { RuleBuilder *ruleBuilder = [[RuleBuilder alloc] initWithNibName:@"RuleBuilder" bundle:nil]; [self pushModalViewController:ruleBuilder animated:YES]; [ruleBuilder release]; return NO; } This compiles just fine, but when I run the code in the simulator and run through the peoplePicker, nothing happens when I select a contact property. On a whim, I added a [self dismissModalViewControllerAnimated:YES]; just before [ruleBuilder release]; and that dismisses the peoplePicker, but otherwise has no effect on my missing ruleBuilder. Any ideas?

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  • Autoresizing subclassed UITableViewCell subviews

    - by JustinXXVII
    I've subclassed UITableViewCell and incorporated some subviews via the layoutSubviews method. All views are allocated and initiated in the initWithStyle method, and frames are set in the layoutSubviews method, like so: initWithStyle:... { UILabel *myLabel = [[UILabel alloc] initWithFrame:CGRectZero]; myLabel.someProperties = Configured; [self.contentView addSubview:myLabel]; layoutSubviews { CGRect labelRect = CGRectMake(10.0f, 5.0f, 35.0f, 180.0f); myLabel.frame = labelRect; Setting the shouldAutoRotateOrientation to YES in the viewController rotates the NavigationController, tableView and UIToolbar appropriately, but the contents of the tableViewCells don't move. I'm not clear on where or what to add as far as AutoResizingMasks. The combinations I've tried so far haven't done anything. Can someone give me a hand? Thanks!

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  • Could MacRuby / HotCocoa supplant the need to know Objective-C?

    - by frou
    I just discovered MacRuby / HotCocoa and really like the sound of what they're doing. I had essentially discounted the prospect of making Cocoa GUI applications myself because I have an aversion to spending time & effort learning yet another C-based language, Objective-C. I'm not saying it's bad, just not for me. Is it the case now, or in the probable future, that one will be able to make Cocoa GUI applications of substantial and first-class nature with MacRuby / HotCocoa alone while ignoring Objective-C completely?

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  • Adding UIBarButtonItem to UINav..Controller

    - by mlecho
    i am not sure what i am missing here. I Have a custom UINavigationController and i am trying to add a persistant UIBarButtonItem to the bar. -(void)viewDidLoad { self.navigationBar.barStyle = UIBarStyleBlack; UIBarButtonItem *bbi = [[UIBarButtonItem alloc] initWithTitle:@"Nope..." style:UIBarButtonItemStyleBordered target:self action:@selector(goBack:)]; self.navigationItem.leftBarButtonItem =bbi; [bbi release]; } -(void)goBack:(id)sender { NSLog(@"go back now"); } what am i missing here? - BTW, i do not want to/ will not use IB.

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