iphone

iPhone screen rotates at random !

I use a tabBar Controller as root controller. It has 4 tabs and each of its ViewControllers has - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation { return YES; } as long as the tabBarController itself. But when I rotate the device (real or simulator), the screen turns at random! If i...

IPhone SDK - Leaking Memory with performSelectorInBackground

Hi. Maybe someone can help me with this strange thing: If a user clicks on a button, a new UITableView is pushed to the navigation controller. This new view is doing some database querying which takes some time. Therefore I wanted to do the loading in background. What works WITHOUT leaking memory (but freezes the screen until everythin...

Inserting "£" in a string to a text file

iPhone Application writes data to a text file, saves it on the Documnets folder. Great that works If I place "£" in the string, or use [currencyStyle stringFromNumber] the text file will not be created. The "£" and the [currencyStyle stringFromNumber] works if the information is printed to a "New View" page on the simulator, pound and...

NSURL Connection will/won't load data

So here's my issue: I followed the NSURLConnection tutorial in the iPhone Developer Documentation almost to the T, and it only kinda works. Here's where it all goes wrong: The object seems to be created correctly and delegates to connectionDidFinishLoading, but with any URL I try to load the response data always ends up only being 0 by...

Question about Objective C calling convention and argument passing on ARM

I want to know how objective C runtime handle arguments when I call a objective C method like [NSString stringWithFomat:@"%@, %@", @"Hello", @"World"] There are three arguments for this objective C call, how does it work compared to typical way on a ARM system. I have known register r0, r1, r2, r3 will hold first 4 arguments, how abou...

UITabBarController + autorotation

Hi, I created an application with a TabBarController using IB who have 4 TabBarItems and so display 4 differents ViewControllers. To allow a landscape orientation I must add this code in all of my ViewController: - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return (interfaceOrienta...

How does [self.tableView reloadData] know what data to reload?

It bugs me to death that my viewcontroller, which happens to be a tableViewController, knows without being told that its property that is an NSArray or an NSDictionary holds the data that is to be loaded into the table for display. Seems like I should explicitly say something like: [self.tableView useData:self.MyArray]; I want to ha...

how to make the pin show bigger in Google map?

any property can set the pin in google map bigger? from what i know, MKPinAnnotationView class only provided few properties but not any related to set custom pin size. Pls help if have any idea. Thanks in advance ...

How to reference object values from subview?

I have a UIViewController with a XIB and want to add programmatically another subview. During the initialization of the subview (initWithFrame) i want to set some attributes to values according to attributes that belong to another Object which holds data (actually a ViewControllers Child-Object, but not a view). -(id)initWithFrame:(CGR...

Strange padding/margin when using UIWebView

Hello, I am creating an app that is having a UIWebView which contains an advert. The size of the view is the same as the advert (image) itself. Still, there is a white margin/padding of some kind above and to the left of the image, inside the UIWebView. Check out the linked image: Actually, the image is pushed down and to the right ...

NSFetchedResultsController is driving me crazy

Hi everyone. i've been building an app since 1 month using NSFetchedResultsController and i was testing the app on the 3.1.2 SDK. The poblem is that i've been using NSFetchedResultsController everywhere in my app and was working on the 3.1.2 version of the SDK, now my client say that i should make it compatible with the 3.0 version and ...

Common, reusable iPhone-App configuration screen

I'm writing code that will allow my iphone-app to have a "configuration page". A grouped, scrolling, UITableView... with cells that contain the needed textFields, switches, sliders, etc. It is an ENOURMOUS amount of code. Is there an easier way? Is there a way I could create a simple text-file, contain all my desired design choices a...

IPhone two fingers twist gesture

Hi. I need to rotate an image when the user do a two finger twist on it. do you have an idea on how i can code this or if you've done this before. I think it would be a good idea to write a class that detect all the main gesture and provide iif. ...

NSCalendar: Problem getting weeks in a month...

I am creating a calendar control of sorts... One thing I need to know is how many weeks are there in a Month... So NSCalendar rangeOfUnit:inUnit:forDate Seems to be exactly what I need... Except I am noticing something that seems off and I can't quite figure out why this is happening... The following code... NSCalendar *calendar = [...

Using undecorated UiNavigationBar

Hello, I would like to use UINavigationBar without decoration. I.e. I would like to create my own custom buttons and link those to the same actions (e.g. back) as the navigation items were linked to and have no bar presented at the top. I was told that one should use navigation bar even though graphically you should design the interacti...

How to put an image and a bottom text together in a UIButton?

Hello, guys. I want to put an centered image and a bottom centered text in a UIButton. How I can do that? Thanks in advance. ...

what's the preferred visibility toggle for UIImage (like setHidden on UIButton)?

I'd like to control visibility on a simple UI element. If it was a button, I'd just call setHiden on it, but UIImage has no such method. What's the preferred way of showing or hiding an image? Just making it a UIButton and not hooking it up to any methods seems wasteful.. is that really the right way to do it? ...

For UITableViewCell (on iPhone) I need to figure out how to get it's current position?

So, idea is the following. I have UITableViewCell, and when I click on it, I want to show UIActivityIndicatorView right in this cell. I cannot figure out how do I find the X/Y or any position (I can find the frame size of UITableViewCell though but it does not help much :-) for the given cell. Any tips? Help? Thank you! ...

sqlite3 datetime not functioning properly on iPhone

Hello, I am having trouble getting sqlite3 to do comparisons between datetimes. On my mac, when I run the sql queries, it works. However, on the iPhone, the exact same query fails. I have a sqlite3 table setup as follows: CREATE TABLE IF NOT EXISTS `Artists` ( `id` int(11) NOT NULL PRIMARY KEY, `name` varchar(256) NOT NULL, `lastUp...

iphone - forcing button to acknowledge touch programmatically

When you touch a UIButton it hides for a fraction of second and then it executes its action. This fast "blink" is the feedback the user needs to know that the button has been clicked. In the project I am doing, I need to select the button programmatically, as if the user had clicked it. In other words, the same behavior has the button h...