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• Ability to Choose From Multiple SQLite DBs for Iphone Application

  - by Mark

  I am working on the design and implementation of an iPhone application ( a newbie, but I am getting the hang of it) where a person can download specific contact information about teachers based on their majors. The information is currently on different edu websites. And I have exported the information into SQLite databases. Is it possible to develop the application that when it is first initiated, it can give the user the option of which particular SQLite database they want for their application? Or if not, would it be better to merge all the DBs into one DB, and allow the user the option of downloading specific information from the SQLite db. I see that the db's can be downloaded into an app, but have yet to find a solution where there can be an option to download from different SQLite dbs. Thanks!

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• iphone @property(retain), init(), and standards

  - by inyourcorner

  I'm new to the memory management of the iphone and had a question about standards/correctness. My header file declares: IBOutlet UITabBarController *tabBarController; @property (nonatomic, retain) UITabBarController *tabBarController; In my init() code I was doing something like the following: self.tabBarController = [[UITabBarController alloc] init]; [tabBarController release]; NSLog(@"Retain count of tbc: %d",[tabBarController retainCount]); to get the retain count back to one. Is this correct from a standardization point of view? It just looked a bit different to me, but again I'm new to this. Thanks

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• iphone development bank payment

  - by twelshesgi

  I have been hired to develop an iphone app. My customer is non-technical and wants me to take care of everything. So, I want to develop and manage the app within my existing account, but have his bank information so he gets paid automatically. But itunes connect seems to only allow a single bank account for all my apps. Is there a way to route payments for just his app? Apologize for posting this to programming forum . . .

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• How to trigger Mouse-Over on iPhone?

  - by Andrew

  This might seem like a really dumb question, but I am writing an application and I have come across where my mouse-over, mouse-click and mouse-hover need different events bound to them. Now on Internet Explorer, Firefox, and Safari. It all works as expected. However, on my iPhone the actions will not trigger. Now my question is are their any specific ways I can have the Mouse-Over essentially be fired when I hold my finger down and trigger an event? An example where this doesn't work is right on this website when you hover over a comment it is supposed to display the +1 or flag icon. I am using jquery.

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• iPhone: different icon for homescreen and App Store

  - by arne_

  I would like to know if the app icon on the iPhone can be slightly different than the one shown in a large version in Apple's App Store. It was discussed in short here: http://stackoverflow.com/questions/28551/tips-for-a-successful-appstore-submission/266657#266657 But I wanted to make sure if anyone has more experience with that. To give an example: The New York Times has many words incorporated in its app icon (see http://itunes.apple.com/de/app/nytimes/id284862083?mt=8). Would it be okay to have a full black colored background without the words in the small/homescreen version of the icon?

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• iPhone xcode - Best way to control audio from several view controllers

  - by Are Refsdal

  Hi, I am pretty new to iPhone programming. I have a navBar with three views. I need to control audio from all of the views. I only want one audio stream to play at a time. I was thinking that it would be smart to let my AppDelegate have an instance of my audioplaying class and let the three other views use that instance to control the audio. My problem is that I don´t know how my views can use the audioplaying class in my AppDelegate. Is this the best approach and if so, how? Is there a better way?

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• UIPickerView in iphone

  - by Harita

  hi, i am making an application of iphone, in which i have a table view, on every row of table view i have created a button programmatically & on its click method am showing picker view. Picker view showing perfectly, on picker view's toolbar i have 2 barbuttonitem named Done & Cancel. i have added below code in Picker view's delegate method but button title is not changing with this delegate method static int _selectedRow; -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { NSString *title = [pickarray objectAtIndex:_selectedRow]; //[pickarray removeObjectAtIndex:_selectedRow]; [pickarray insertObject:title atIndex:_selectedRow]; [table reloadData]; } Any ideas how to show selected row title on button?

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• iPhone: Try to send html code to a php script (but fail)

  - by Marc-André Weibezahn

  Hello all, I am trying this for an iPhone app in Xcode: create html code for a website on the fly sending it to a php-script and getting the response with this code: NSError * error = [[[NSError alloc]init]autorelease]; NSURL * phpURL = [NSURL URLWithString: @"http://www.mydomain.com/myscript.php?mywebsite= (...websitestring...) ];NSString * myResponse = [NSString stringWithContentsOfURL:phpURL encoding:NSUTF8StringEncoding error:&error]; It does not work. It should not be a problem of the php code because when I replace the websitestring which contains the html code with "hello" or something, this is accepted. (the script then creates a file "test.html" with the content I sent.) But when I put html code in it, I always get the error: Error Domain=NSCocoaErrorDomain Code=256 "The operation couldn’t be completed. (Cocoa error 256.)" UserInfo=0x322ec10 {} It seems that there are some things to consider when sending code to php? Thanks in advance!

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• iPhone Application and programming Updates

  - by Cheryl

  Hi When a user logs into my iPhone App. I store their userID and relevant information in [NSUserDefaults standardUserDefaults]. This way they are not required to log in each time they access my application. When my application is live in the app store and I make updates to the code will this information be lost - will they then be required to log in? If so how do I go about preserving this information when I make updates? And while I can't image this happening but should a user choose to delete my application after they have installed it - how would I know that they have deleted it? I am using the push notifications and would like to flag the user as not being active so that I don't keep pushing out notifications to them. Thanks Very Much Cheryl

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• iPhone "multi-threading" question

  - by MrDatabase

  I have a simple iPhone game consisting of two "threads": the main game loop where all updating and rendering happen 30 times per second (NSTimer)... and the "thread" that calls the accelerometer delegate 100 times per second. I have a variable "xPosition" that's updated in the accelerometer delegate function and used in the game loop. Is there a possibility of the two "threads" trying to use xPosition at the same time (hence causing a crash or some other problem). If so how can I fix this w/ minimal impact to the game's performance? I've been using this set-up for many months of development and incremental testing and I've never run into any problems. Cheers!

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• Can I submit iPhone applications with same Icon.png but differnt bundle name

  - by AJ

  Can some one tell me if it is possible to submit two different iphone applications which has same Icon.png but have a different bundle name? I am working on a travel guide app that is targeted for different cities. I want the users of different cities to download the app as per their cities. So I want to submit different apps for different cities(3 in my case). User can also purchase any of these cities through in-app purchase. In that case the new purchased city would be unlocked in the app. Here is my thing. I want the same icon for all the three apps. I can do away with different names for app store and bundle(home screen icon name). But I am not sure if apple would approve/reject this app. Can someone enhance this blur picture I have?

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• Iphone UI Size / Layout Resource?

  - by blindJesse

  Is anyone aware of a website or download to reference for the size of UI elements or standard iphone interface stuff? What I mean is something that gives the height of elements like the status bar, tab bar, navigation bar, default tableviewcell height (and such things as width of accessory view, indentation, etc), default icon sizes, default font sizes for UI elements (if they need to be mimicked, for instance), etc etc etc. It's amazing how many times I have to go back to find a reference or estimate the size and position of a standard element. It seems like it would be an invaluable resource that could fit on a printed page or two.

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• iPhone Tab Bar App With Registration View

  - by leeks

  Hi! I'm a relative newbie on iPhone app development but have successfully created a tab bar app with 4 tab bar items. I would like to have a one-off registration page for users to key-in information when they open the application for the first time. The registration page should load before the view with the selection of tab bar items loads. What is the best way to do this? Also, how do I load a UIView or UIWebView before the tab bar items load? Any suggestions and sample code would be very much appreciated - thanks!

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• dabbledb + iPhone

  - by user193545

  I have been using DabbbleDB online database for storing/retrieving values for one of my iPhone applications. I am using their JSON response for retrieving the records. The problem that I am facing is that if there are a large number of records in the database, it takes a long time to get the response from the server and then to parse the JSON response. Instead I would like to to get a set of records at a time and run a loop to fetch all the records in background. I do not know whether we can query for a set of records at a time from online databases like DabbleDB. Anybody having an idea, please help.

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• iPhone : Primitives getters and setters

  - by Burf2000

  I feel a bit miffed at the moment, I done a few iPhone projects that use floats and ints etc and all is fine. I now using OpenGL and GLFloat[] C arrays etc and it seems unless I make methods to set / get them it crashes on the device (not the simulator). Now as these are not setup as properties (I don't think c arrays can) it kind of makes sense. However the project has been working for months without them. It seems something in the code is wiping out anything float / ints to the point that the debugger can see an assigned value but accessing it crashes the phone. As soon as I think I know something for this platform, something changes my mind lol.

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• iphone - Connecting to server in background

  - by Satyam svv

  I'm creating an app which connects to server and sends some text. If network (both wifi or 3g) is there, it will immediately send the text to server. But if there is no network, it keeps on polling for server connection every 5 minutes. All this part is working fine. But when using iPhone 4 device, i want the app to check for server connection even when app goes into background. So, when app goes to background and when network comes back, it must be able to send the text to server. How can I achieve it? I've seen some apps where they say that the app will upload photos to server even in background. How will they do it?

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• iphone - navigation controller - move to first view from last view without traversing all intermedia

  - by satyam

  i'm working on iphone app which will show 4 buttons in first view. on click of a button, it will load a new view with navigation controller. this navigation controller view allows to travel upto 11 sub views. in 11th sub view, i've a reset button. on click of reset button, i've to go back to navigation controllers first view without traversing all the 11 views? is it possible to achieve it? if yes how? if no, what can be the solution?

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• Handling out of memory errors in iPhone

  - by hgpc

  I would like to handle out of memory errors in iPhone to execute logic with lesser memory requirements in case I run of of memory. In particular, I would like to do something very similar to the followin pseudo-code: UIImage* image; try { image = [UIImage imageNamed:@"high_quality_image.png"]; } catch (OutOfMemoryException e) { image = [UIImage imageNamed:@"low_quality_image.jpg"]; } First I attempt to load a high-quality image, and if I run out of memory while doing it, then I use a lower quality image. Would this be possible?

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• iPhone real memory climbs when interacting with UI

  - by Scott Gress

  I've been using the Activity Monitor to check the memory usage of my iPhone apps. I've noticed that the Real Memory climbs whenever I interact with the UI in any way, even if there's no code being called. For example, I can create a brand new View-Based application and run it, and as I click or drag in the empty window the Real Memory increases even though the app isn't responding in any way. I get that the view controller is doing some stuff in the background to interpret my interactions, but it seems like the memory should go back down after a second or so. Instead, it keeps going up and up and up as long as I keep clicking or dragging. I can wait forever and it never decreases. This is a little disturbing. Am I missing something?

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• TabbarController in UIViewController in iPhone?

  - by arizah

  I'm pretty much new to iphone development and I started with ViewBasedApplication and I have a UIViewController(GetDetails) and I'm adding a tabBarController to it .There are two tabbar items GetDetails and Login.On startup of app GetDetails view will load up.Now when I click on the other tabbaritem (Login )it has to redirect to LoginViewController.But in my app when I click on Login ,LoginViewController with two textboxes and a button is loaded.But the problem is additionally I am also getting the textbox and button of GetDetailsViewController.For Login tabbaritem I have set the nib name to LoginViewController.. How can I get the corresponding view only when a tabbar item is clicked ?

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• iPhone - At user event create objects in the view

  - by insaneshow

  Hello, I am new to iPhone programming, so I think part of the problem is that I don't know what I really want to google to find my answer. I am looking for a method that allows a user to draw a line on the screen. There is no guarantee that it will be straight, it can be curved or whatever. I was thinking that I could create some small square image, and then as they draw, place them into a NSset. But I am not really sure how to communicate each new object up to the view. Up to this point, I've just been messing around with objects I put on the view and then assign movement to those, this is my first jump into on-the-fly object creation. It might be that I just need to jump into a class/object type or even a tutorial, any guidance would be great. Thanks!

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• "Refreshing" an XML feed on iPhone/Mac OSX

  - by Steve

  Hi all, I'm curious for those of you who are building iPhone apps based on REST/SOAP/XML-RPC or simply pulling down a dynamic XML feed, what does it mean exactly to you when a user says 'refresh' the feed? The straight forward way is to populate some collection, say an NSMutableArray, with whatever you bring down from the feed. If a widget on the UI is available to refresh, I typically do something like: [myMutableArray removeAllObjects]; // follow steps to repopulate myMutableArray It seems this is the least efficient algorithm for refreshing an XML feed. For instance many folks who are building Twitter clients, are appending changes to their existing feed, versus bringing down the entire feed in its complete form again. What kind of algorithms are you using to "refresh" your models when speaking to a server-side data source? Thanks all.

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• Can I sell video and music in iPhone app via in-app purchase

  - by initialz

  Hi, I'm going to sell some video and music (which I have right to use and sell) in iPhone app. But I'm not sure whether this is allowed by Apple. The plan is to create a consumable in-app purchase product and ask user to pay it when visit the individual video page. After successful purchase, user can download or view it online without any limitation. Server side will also remember the purchase status so the user won't be asked to pay when he visit this vide page next time. So, does anyone have experience on this kind of business and give me some suggestions? Thanks a lot!

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• Image impending other elements in iphone app view!

  - by wayne

  Hi. If someone could help I have a view in my iphone app with an image, a label and a button. I have positioned the image at the back however when I run the simulator the image is all that is showing. I have done exactly the same thing with other views and they work fine but can't get this one to work. I have checked that the image is "send to back" and other elements are at the front. Still no good. Any advice would be much appreciated. Thanks

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• How to skew/resize/distort an image given points within that image (iPhone)

  - by user544082

  I want to take an image in which there will be a quadrilateral, and skew or otherwise distort the entire image such that the object that was a quadrilateral is now a square or rectangle. I realize this will distort the image, and that is okay. I know how to skew or manipulate an image, but I can't conceptualize how this would be done given information regarding the coordinates of the four points that define the corners of a quadrilateral within the image itself. I can safely find those coordinates every time, so that part is a given. This is for an experimental iPhone app. Any help would be much appreciated.

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