Hi there, I'm about to create a series of NSOperations and run them in a queue. They will all be sequential and run one at a time. These operations will fetch data from the web and create and save core data managed objects. How do I handle the situation where the application exits? As the operations run in detached threads, how can I...
Hi friends, I am developing an alarm clock application in iphone. I am not able to find how to set alarm which will trigger even if the app is not running. Please suggest me some code or tutorial to do it. Thanks in advance. ...
Since new Xcode 3.2 I find it very hard to add Quartz Core Framework. It does not appear in the list. Previously I just typed in Quartz and some QuartzCore.framework thing popped up. Finder is so bad it does not find any *.framework file on the mac so now the big question is: Where is it hidden? ...
As far as I can tell, I need an UIView (or subclass of UIView) to display an CALayer on screen, right? Then, what's the point of using CALayer for saving memory? The only point I see is when I would add several sublayers to a CALayer. Then those sublayers would not get copied 3 times for all the different tree types like presentation tr...
I developed an app which takes 2-3 seconds to start up. I want to show a picture in this time frame, a UIImage or some other view. How can I do that? I tried pasting it in the window but it isnt showing. ...
Hi, I was just have an idea of creating a card game and I was just thinking whether to use OpenGl or CoreAnimation.Can you please tell me whether it would be a bit of a overkill to use OpenGL for s 2D card game.Thanks :) ...
I am presenting the user with a field that displays the number keyboard and only want them to be able to enter numbers--no decimals. Since the field is a currency field, however, I want the number to always display with two decimal places. You've probably seen this type of an interface at an ATM. I've looked at the NSNumberFormatter doc...
I am posting this question because I had a complete answer for this written out for another post, when I found it did not apply to the original but I thought was too useful to waste. Thus I have also made this a community wiki, so that others may flesh out question and answer(s). If you find the answer useful, please vote up the questi...
Hello all, I have a tableview(being IBOutlet) and tableviewController in my ViewController what I do is //.... allocation for tableviewController self.tableview.delegate = tableviewController; //now this increases the retain count of tableviewController... So in deallocation do I need to set the tableview delegate to nil...like s...
I have a web service developed in coldfusion that I am trying to consume on the iphone. The web service returns JSON which should be fairly simple to read. However, I have been unable to find a good simple example of an iphone app calling a web service and using the data. Are there any good tutorials or examples out there that I am just ...
Hi there, I want to use valueForKeyPath on my NSDictionary, but the problem is that one of the keys is a string that starts with the @ symbol. I have no control over the naming of the key. I'm having problems trying to create the key path as I'm getting a format exception, even when trying to escape the @ symbol: This works fine: [[[...
Hello, as you probably know, the UIImagePickerController in the UIKit Framework allows the user to take a photo which is then handed over to my App for further processing. If the property allowsEditing is set to YES, the user is allowed to move and scale the photo after taking it. What I'd like to accomplish is to modify the photo in m...
Hi, I am about to do a [vistaX removeFromSuperview]; How do I test to see if vistaX is present on the super view before removing it? Removing a view that isn't there would lead to a crash on the application... thanks for any help. ...
I'm currently creating an iPhone app where in one part of my app you can view your twitter stream. I'm unsure if I need to ever save the twitter information to a sqlite database or not. So here is the flow of this part of the app: press button to see twitter stream go get twitter stream display twitter stream in table view I'm won...
The documentation says about timerWithTimeInterval:target:selector:userInfo:repeats: Returns a new NSTimer that, when added to a run loop, will fire after a specified number of seconds. I don't fully understand this. Maybe someone can tell if it fires immediately or if the first time the selector gets called would be after the ...
I'm new to mac and iPhone programing. I got a mac computer with os 8.5 from a friend, can I program iPhone applications on this computer? If not, what should I do? ...
I have a client that wises to distribute their iphone application to only their employees and not on the iTunes App Store. To me this sounds like a situation for Enterprise Distribution. Could someone explain to me in as much detail as possible this process. I know we will need to enroll as an Enterprise Distribution Member before a...
Hi all, I wanted from within my application to open another native iPhone application installed on the device. I used openUrl method and give it the URL schema for that application but it always launch the web application not the native one. Is there a way I can launch the native application instead? I would appreciate any help. Thank...
Hi, can anybody suggest API either free (that's very good) or paid to convert speech in to text for iPhone application. Thanks, AAryan ...
I'm about to buy a Mac Mini so I can develop an iPhone application. The details are: 1.42ghz 1gb ram 75gb OS 10.5.08 Is this good enough for developing an iPhone application? ...