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• Implementing full text search on iPhone?

  - by Nimrod

  I'm looking for suggestions on the best way to implement a full-text search on some static data on the iPhone. Basically I have an app that contains the offline version of a web site, about 50MB of text, and I'd like for users to be able to search for terms. I figure that I should somehow build an table of ("word", reference_to_file_containing_word) or something, put that into either Core Data or just sqlite, index the "word" column, then have the search facility search the table for search terms and take the intersection of the sets of results for the terms or something. That wouldn't allow people to search for phrases but it would be pretty easy and probably not too slow. I'd like to just use existing SDK features for this. Should I use Core Data or sqlite? Does anyone have any other ideas on how this could be done?

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• iphone pushviewcontroller to landscape

  - by satyam

  I've simple iphone application. it has 3 views. first view is portrait view that has 3 buttons. second view has a table view which is also a portrait. In first view, on click of a button second view is shown. on click of a cell in second view, thrid view is shown. but third view is a landscape. I'm using "pushViewController" to navigate from each view. When creating views in IB, first two views are portait and 3rd view is a landscape. In 3rd viewcontroller, i'm using following code as well: - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { //return UIInterfaceOrientationIsLandscape(interfaceOrientation); return ((interfaceOrientation == UIInterfaceOrientationLandscapeRight) || (interfaceOrientation == UIInterfaceOrientationLandscapeLeft)); } How can I show first two views in portrait and third view in landscape.

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• Iphone UIView implementation

  - by Joo Park

  How does one code this scenerio in iphone sdk? In an expense app, when you want to add an expense, this view comes up. After selecting "Clothing," another view slides up with a UIPickerView control that has a "done" button which will dismiss the UIPickerView. Below is a screen shot after hitting "Clothing." I'm trying to figure out how one would slide up the UIPickerView half way up the screen with a "done" button on top of the "New Expense" view? thank you in advance!

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• iPhone Text entry with completion and DONE button (not search)

  - by Adam Jack

  Using iPhone SDK 3.0, I wish to allow text entry with (optional) completion options that appear as typing is occurring, i.e. also allowing freeformat entry. As such I am using a UISearchBar (which has the text change events) and a UISearchDisplayController to present options. The problems is I want the DONE button to say DONE and not SEARCH, however I cannot find a way to set that. Clearly I feel I am missing something, or Interface Builder of the SDK API would have some property to set. I have seen other apps (in the store) that have achieved the result I want (free format entry, completion, DONE button) so maybe there is an alternative approach I am missing. Thanks in advance for any pointers.

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• Click Tabbar to Open Email view in iphone

  - by Pugal Devan

  HI, I am new to iphone development.I have created tabbar as programmatically and sets two view in the tabbar. Now i want to load a email application view when i clicked the tabbar and it opened and works properly.Then i clicked the next tabbar and come back to the email view, it doesnot displayed.So i am facing the problem is only one time open my mail application. I want to display the email view while clicked the tabbar. Now i have written in my code is viewDidLoad. So please guide me. Here is my code, - (void)viewDidLoad { [super viewDidLoad]; MFMailComposeViewController *mail = [[MFMailComposeViewController alloc] init]; mail.mailComposeDelegate = self; if ([MFMailComposeViewController canSendMail]) { [mail setToRecipients:[NSArray arrayWithObjects:@"[email protected]",nil]]; [mail setSubject:@"Title"]; [self presentModalViewController:mail animated:NO]; } [mail release]; } Thanks.

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• UIViewControllers - TabBarApplication - iPhone SDK

  - by Kevin

  Hello everyone, I am very new to the iPhone SDK. I need to know if in a tab bar application I need to make UIViewController classes. For example, when I make a new tab bar application there is a default FirstViewController class (.h, .m) already there. Now if I have code on the second tab, would I need to create a SecondViewController class? If not, how would I make a button on the 2nd tab, and make that button do something. I'm not really sure how to do it, because the FirstViewController works with the buttons and code, but if I make a SecondViewController, and I link everything my app crashes. If anyone could help it would be greatly appreciated. Kevin

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• iPhone application launch time guidelines

  - by Alexander Gladysh

  Please point me to the iPhone application launch time guidelines. I see that there is a hard limit of ~24 seconds. OS kills application if it did not started in that time with the message: com.bundle.id failed to launch in time There is also a QA article on this. (24 seconds is the time until OS on my phone kills the app.) But I think that there should be a shorter soft limit somewhere in the docs. However, my google-fu failed me and I was not able to find it. Any help?

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• How to synch SQLite data to server in iPhone

  - by crawler486

  Hello Guys, I'm a total noob when it comes to iPhone development and have been tasked to create a database app that can download and upload sqlite data to and from a server via http using web services. So far I already have a form for retrieving and saving data to a SQLite database and now I need some information on how I can upload the SQLite data to a server. The SQLite database will only have one table with 3 columns and about 200 rows max. I hope somebody can point me to the right direction or lead me to some sample codes. Appreciate any help.

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• iPhone filesystem permissions POSIX-compliant?

  - by Seva Alekseyev

  Hi all, I'm trying to pass some files from one app to another. I communicate the path (via a custom URL). The target application cannot read the file, citing errno 13 (permission denied). I've checked the permissions on file - they're 0644 (O+R), the permissions on directories all the way up to the root are 755 (O+RX). From a POSIX perspective, the file should be readable to any process and any user. Yet it's not. Any ideas, please? I can think of some workarounds. I could use a Web service (upload, get a cookie, communicate the cookie to the other app, other app downloads). I could also pass the actual file data in the URL - unelegant, and probably subject to length limitations. Clipboard is not supported on iPhone OS 2 IIRC.

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• How to store javascript variables in iPhone application

  - by sugar

  <script type="text/javascript"> function getSelectionRange() { var sel; if (window.getSelection) { sel = window.getSelection(); if (sel.rangeCount) { return sel.getRangeAt(0); } } else if (document.selection) { return document.selection.createRange(); } return null; } var range; </script> whatShouldBeHere=[wvText stringByEvaluatingJavaScriptFromString:@"getSelectionRange();"]; Here, method getSelectionRange is returning JavaScript Object of Range type. How can I catch & store in plist file in iPhone application ? Thanks in advance for sharing your knowledge. Sagar

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• How to achieve a palette effect on iPhone using OpenGL

  - by Joe

  I'm porting a 2d retro game to iPhone that has the following properties: targets OpenGL ES 1.1 entire screen is filled with tiles (textured triangle strip tile textured using a single 256x256 RGBA texture image the texture is passed to OpenGL once at the start of the game only 4 displayed colours are used one of the displayed colours is black The original game flashed the screen when time starts to run out by toggling the black pixels to white using an indexed palette. What is the best (i.e. most efficient) way to achieve this in OpenGL ES 1.1? My thoughts so far: Generate an alternative texture with white instead of black pixels, and pass to OpenGL when the screen is flashing Render a white poly underneath the background and render the texture with alpha on to display it Try and render a poly on top with some blending that achieves the effect (not sure this is possible) I'm fairly new to OpenGL so I'm not sure what the performance drawbacks of each of these are, or if there's a better way of doing this.

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• How to request device token on iphone

  - by Greg

  Hello, I am able to use the didRegisterForRemoteNotificationWithDeviceToken callback method to get the device token of my iphone when subscribing to push notifications. My question is how can I get this token again a later time? When a user subscribes to something in my application, I want to send the device token and the id of the item they are subscribing to...but I can't figure out where to get the device token from. I tried using the uniqueIdentifer from the UIDevice class but this value is different than what the original token was. I supposed I could call registerForRemoteNotificationTypes each time my app starts to produce the token. But if I do that, I'm not sure how I can access this value from a different class (my didRegisterForRemoteNotificationWithDeviceToken callback is located in the main application delegate). Thanks for any help for an objective C newbie!

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• iPhone Web Development Image Scaling

  - by Dominic Godin

  I am developing a simple web page to be viewed after an iphone application completes. I am finding the safari degrades the image quality of the jpg so its all fuzzy. The image is background image applied to a div div.foo { background: url(../images/foo.jpg) no-repeat; width:320px; height:349px; } The width and height are exactly the same as the jpg image. Is there a way to make sure the image gets displayed in its full quality?

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• Static string variable in Objective C on iphone

  - by Prajakta

  Hi, How to create & access static string in iPhone (objective c)? I declare static NSString *str = @"OldValue" in class A. If i assign some value to this in class B as str = @"NewValue". This value persists for all methods in class B. But if I access it in class C (after assignment in B) I am getting it as OldValue. Am I missing something? Should i use extern in other classes? Thanks & Regards, Yogini

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• [Iphone] - Problem in saving file using NSCoding

  - by Matte Gary

  Hi everybody, I've a problem with Iphone programming... I've a NSMutableArray containing object of type "MyClass". MyClass has some parameters, like NSNumber and NSString. I've followed the Apple Tutorial about coding and decoding object using NSCoding, but when I try to decode the file I've stored, the NSMutableArray contain object of type "MyClass", but with wrong parameters. I think i've done all I've to do (including protocol, including methods like initwithencode etc), but it's still not working... Any suggestions? Thanks a lot! And sorry for my English XD

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• Stop scrolling to top in UIWebView - iPhone

  - by sagar

  I have placed following javascript in my html file. <script TYPE="text/javascript"> function srk(){ document.ontouchmove = function(e){ e.preventDefault(); } } </script> I am scrolling my webview by following code with some animation. [myWebView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat: @"window.scrollTo(0,%i);",414*self.initialScrollPosition]]; Everything going right, but on problem that I am facing is as follows. Whenever User/I tap on the status bar of iPhone, WebView Bydefault scrolls to top. This should not be done. Is it possible to prevent inbuilt functionality ? I know one of the option is as follows. ((UIScrollView *)[[myWebView valueForKey:@"_internal"] valueForKey:@"scroller"]).scrollsToTop = NO; But is it valid to do ?

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• OAuth on iPhone: using Safari or UIWebView?

  - by athanhcong

  Hi all, When I implement OAuth in iPhone, I have a dilemma to choose Safari or UIWebView to open the Twitter pages for user authentication? I write some advantage and disadvantage of both case: Using UIWebWeb. The disadvantage is users have to enter their credentials in our application. It's maybe risky phishing. The advantage is this approach will not quit our app. Using Safari for user to authenticate (this approach automatically callbacks to our application) Addvantage: less risky. Disadvantage: have to quit our app A good reference link about this: http://fireeagle.yahoo.net/developer/documentation/oauth_best_practice Which approach do you prefer? Any response is appreciate. Thanks.

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• Iphone App Similar to the Talking Larry Application

  - by Zeeshan

  I am developing iphone application similar to the Talking Larry Application. I am facing an issue of Low Memory when i pre-load the animations into an NSMutable Array. If i do not pre-load the animations and load it into the Animation Images when the user touch the button then it takes Time and it play back the animation very Slow. And during video making it does not play the complete animations. How can i resolve this issue. I want to play back the animations similar to the Talking Larry app and do not want to get Low Memory Issue.

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• iPhone first time application ran and config files

  - by VansFannel

  Hello. I have two question: I'm developing an iPhone application and I want to know when it is the first time the application is executed. I want to check some extended permissions from facebook the first time. How can I know that? (first question) Another way to solved this problem is to store the extended permissions granted in some configuration file. I don't want to make visible this file through app settings icon. How can I add some configuration files to store these permissions granted? (second question) Thanks

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• iPhone SDK: Bonjour & NSNetService name != published name?

  - by Harkonian

  In my iPhone app, I'm publishing a bonjour service and using the following delegate method: - (void)netServiceDidPublish:(NSNetService *)ns { NSLog(@"Bonjour Service Published: http://%@.%@", [ns name], [ns domain]); } The "name" property is returning the device name, "How's Testing", which is correct. However, when I use Safari to discover available services the name is "hows-testing" -- the service is http://hows-testing.local.:. Why is the published name different than what is being reported by the NSNetService? How do I display for the actual name of the published service? Assuming that, for some reason, there is no way to get the published name from the object, how do I determine it myself? I understand that it's based on device name, but what are the substitution rules? Remove apostrophes, replace spaces with dash...anything else? What about special characters?

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• Having trouble with event creation using the events.create API with the iPhone SDK

  - by MahatmaManic

  I'm using the FBConnect library in my iPhone app, and I'm trying to create Facebook events. After getting a valid session and verifying permissions, I'm using events.create and getting what looks like a valid event ID back from FB in a success response. Oddly the event isn't showing up on my account's Events page either in current or in past events. I thought the problem might be that the event might not include me as an attendee so I followed the successful events.create call with an events.rsvp call to set my status to "attending". That also gets back success from FB, but I'm still not seeing anything show up. Am I missing a step? Is there something other than Create and then RSVP that I need to do, or is there an error with the api/Facebook? I don't think I'm missing any of the required fields for event creation (name and start_time) and I am populating a lot of the other fields in event_info...

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• best practice to obtain time zone for iPhone vs iPod Touch

  - by johnbdh

  I am creating an app that requires the users current time zone. If the device being used is an iPhone and the user has their Time Zone set to automatically change, I think I can be fairly confident that localTimeZone or systemTimezone will give me the correct time zone for the user's location. If on the other hand the device is an iPod Touch, the time zone returned by localTimeZone and systemTimeZone appears to always be whatever time zone is set in the Date & Time settings, regardless of the user's actual location. I tried using location services but, while the lat/long is being provided properly, the time zone offset in the timesStamp I am getting is always the same as whatever the user has set for their time zone setting. Any suggestions? John

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• iPad/iPhone: Form filling application pointers

  - by raj.tiwari

  Folks, I am starting work on an iPad/iPhone application that is essentially a form-filing UI. The requirement is to present a (rather large) form to the user. The form is composed of sections and questions, like so: Form Question 0.1 Question 0.2 Section 1 Question 1.1 etc. The user can take various paths down the form based on answers to questions. I would like to architect this by defining a declarative markup that can be used to author the form questionnaire including traversal rules. My questions are: Can anyone recommend a markup/language that would satisfy the declaration requirement? Is there any existing library that would ease the implementation as described above? Thanks for your time.

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• How to give a input date format in iphone

  - by Pugal Devan

  Hi, i am new to iphone development. In my input date format is "2010-03-05T18:20:40Z", and i donno to how to give a input format of my code.So i have mentioned in my code (?). input date format = "2010-03-05T18:20:40Z" Here my code is: NSString *indate = @"2010-03-05T18:20:40Z"; NSDateFormatter *inputFormatter = [[NSDateFormatter alloc] init]; [inputFormatter setDateFormat:@"????????????????????????"]; NSDate *inputDate = [inputFormatter dateFromString:indate]; NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init]; [outputFormatter setDateFormat:@"EEE. MMM. d, yyyy"]; NSString *outputDate = [outputFormatter stringFromDate:inputDate]; lDate.text = outputDate; Plz help me out. Thanks.

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• Tiling solution for the iPhone that can handle infinite # of tiles

  - by rickharrison

  I have been looking at ways to implement a tiling solution on the iPhone/iPad similar to something like Google Maps. I have looked at examples of how to implement a CATiledLayer into a view that is inside a UIScrollView. Then when you scroll the view, the tiles request the new data to be shown. However, this seems to work when you have a finite view size (ie: 3000x3000). However, how could I work this into a tiling solution for much larger sizes. Basically, I want to be able to show data as needed for tiles as large as I can. Can I somehow use CATiledLayer to do this? Any direction would be greatly appreciated.

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