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• How to get public key from a certificate in iPhone programe?

  - by user104667

  Now I have a certificate which includes a public key,i want to get the public key from it in iPhone SDK programming, and encrypt a string by RSA with the public key.What should i do? Please help me!!Thanks very much.

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• iPhone SQLite connection in domain object - close each time?

  - by BahaiResearch.com

  I have what I would consider a small sized iPhone app that uses SQLite. There is a singleton domain object which gets data from a SQLite database. Is it better to create and open the SQLite connection for each request, or to open the DB once and hold on to it for the duration of the app. The app's reason for being is the domain object so other objects will not need the DB.

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• What will happen if my iOS 4 iPhone app gets executed on an iOS 3.2 phone?

  - by BeachRunnerJoe

  I assume it will just crash, right? If I develop an iPhone app that uses the iOS 4 SDKs and it makes it's way on into the app store, how can I ensure it doesn't get downloaded by a person running an older version of the iOS? Thanks in advance for your help!

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• On iPhone, what does EPERM (errno == 1) mean in reponse to send() of UDP data?

  - by Chris Markle

  We sending data over UDP from the iPhone, sometimes, but not always, in response to our first send() of UDP data, we are getting back a -1 return code and errno set to 1 (EPERM / operation not permitted). The EPERM result for send(), sendto() and sendmsg() is not documented in the man pages as a return result from those functions. Has anyone out there encountered this and might be able to shed some light on what this errno value means in this context?

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• Is there any Apis to displayed the iWork files in iPhone?

  - by user291302

  I want to display some iWork file in iphone? Is there any apis to help to display it?

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• How to make tabbar visible when opening a mail view in iphone?

  - by Warrior

  I am new to iphone development.I want to create a tab bar with 5 view.In one view i should be able to open a mail composer.I am able to open the composer but mail composer view , i am not able to see the tab bar.How can i achieve that.Thanks.

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• Is there a technology that can pinpoint an iPhone's *exact* location (to the feet/couple feet, indoo

  - by Julian

  Is there is a way to determine an iPhone's exact location (indoors, and to a distance of just a couple of feet) via use of radio/antenna's or some other infrastructure located around premises (i.e a hospital, shopping mall, school). Will appreciate any ideas/direction (technologies, research) as for how to overcome this limitation.

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• Is it possible to decode an MMS+WMA2 stream using audio units on the iPhone?

  - by Nick Toumpelis

  I am not sure whether audio units can work as codecs in a streaming audio scenario on the iPhone. I've read in various places that it can be done, but I haven't seen any examples or proper documentation for that. Instead, I find that most of the apps released have utilised ffmpeg and libmms. I appreciate any help or pointers you can give me.

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• comparison between iphone OS 3.0 and 3.1.3?

  - by Ankit Vyas

  i want to know in Detail comparison between iPhone OS 3.0 and 3.1.3 and also want to to about all newly added features in OS 4.0 so please give a link or some source which gives the comparison and Newly added features in details with Description.

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• iPhone / Cocoa - Are NSThreads less efficient than POSIX threads, or is the diff negligable?

  - by jtrim

  I'm looking at putting together a high-performance multi-threaded iPhone app that's doing a couple of fairly high-intensity operations concurrently. Is the performance difference between NSThread and POSIX threading enough to care about here? If so, I would assume POSIX threads would be more efficient because it bypasses the obj-c overhead. Is this correct?

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• How to check whether the cell has a subview or not in iphone?

  - by Warrior

  I am new to iphone development.I have a view called barView which is added as the subview to the cell, if want to check for the condition like this if(cell has a subview barview) { do something....... }else { do something...... } How can i check like this, please help me out.Thanks.

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• Migrating Identity Providers - specifying a new users password hash.

  - by Stephen Denne

  We'd like to switch Identity Provider (and Web Access Manager), and also the user directory we use, but would like to do so without users needing to change their password. We currently have the SSHA of the passwords. I'm expecting to write code to perform the migration. I don't mind how complex the code has to be, rather my concern is whether such a migration is possible at all. MS Active Directory would be our preferred user store, but I believe that it can not have new users set up in it with a particular password hash. Is that correct? What user directory stores can be populated with users already set up with a SSHA password? What Identity Provider and Access Management products work with those stores?

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• Third-party epub readers for integration with iPad/iPhone app?

  - by lostInTransit

  Hi I would like to know whether there are any third-party epub reader APIs available on the internet which I can integrate with my iPhone/iPad app? Did a search through Google but couldn't come up with an API/reader which can be integrated within my app. Would appreciate any help. Thanks.

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• What is the best way to create continuously looping background in iPhone SDK ?

  - by catpad

  What is the best way to create a continuously looping background using iPhone SDK so that it seems the foreground object is in perpetual motion ? I have a background image which I want to move continuously at a given speed from right to left and seamlessly start displaying the beginning of the image when its end is reached. What is the best, most efficient way to do it to avoid any jumps and get optimal performance ?

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• iPhone Mapkit: How can I get a real business name/address from a longitude/latitude?

  - by vavajo

  I'm writing an iPhone application and trying to determine how to find a business name/address from a user's current GPS location (longitude/latitude). For example, if someone if using the application from inside a Starbucks, how can I find this out from their location? Is there a way to do this using mapkit or any API/Webservice? Many Thanks!

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• Where can I find the xcode template for opencv on iPhone ?

  - by apple.dev

  I want to use opencv frequently for iPhone development, so if there is existing xcode template , that will save me a lot time. Also for others who have same purpose. If not, I need to do it myself. Thanks for let me know if you know.

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• how to check gps singal whether is avliable on iPhone ?

  - by Robin

  as topic... I try to use the didError method , but it does not works ... if I am in room , the iPhone sdk seem insist try to got the location as it could in my app, even the value is not accurate ... how to deal with such problem ? thanks for your help in advance . Regards

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• iphone sdk - why is the video returned not full res?

  - by ADAM

  im developing an app for the iphone and im able to get a video using a UIImagePickerController the problem is that the video thats returned by the UIImagePickerControllerMediaURL is not full resoultion -- its only 480 x 360 as opposed to 640 x 480 like the videos that sync to my itunes. -please someone tell me this is not a limitation of the current sdk? - how can i work around it and is there a way to set the uiimage picker so its taking full res video?

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• How to convert a video via ffmpeg to an mp4 format that will stream and/or download to iPhone and Bl

  - by Yegor

  I have a site where people upload videos, which are converted to .flv format. Simple. I wanted to also convert to an mp4 format that will "stream" to an iphone and blackberry, or allowed to be downloaded to either, for later viewing. Can someone post a working ffmpeg line to accomplish this task? Closest I got was this (which doesn't work) ffmpeg -i in.avi -f mp4 -vcodec libx264 -maxrate 1000 -qmin 3 -qmax 5 -bufsize 4096 -g 300 -acodec libfaac -s 480x320 -ab 128k -qscale 7 out.mp4

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• Best practices to compile an iPhone app optimizing it for maximum speed?

  - by unforgiven

  I was wondering what people is doing in order to compile their iPhone applications optimizing them for maximum speed rather than size or the tradeoff speed versus size.

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• Does Objective-C have garbage collector on the iPhone?

  - by user208662

  Hello, I'm thinking of writing an app for the iphone. But I'm confused in regards to the objective-c language. Am I correct in saying that I have to do my own memory management? Is Objective-C a managed language such as C# and/or Java? Thank you!

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• Iphone newb Question - How to export information to a website?

  - by Rob

  I am a new iphone developer and was wondering if I could get some help with some code. I just want to know how to export basic character strings and variables to a website to be used by a third-party program. Basically, if I had something as basic as: int variableOne; int variableTwo; What code would I use to export these variables to a website?

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• iphone location works in simulator with local code but not on server?

  - by princyp

  so this is really weird to me but my code works properly for getting the geolocation if I run my code locally in the simulator, If I have the code on my server it does not work in the simulator, yet the same url and code on my server works on my actual iphone? It seems to not pick up on the geolocation javascript when its on my server in the simulator?

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• French characters in SQLite..how to display properly in iPhone app?

  - by squeezemylime

  I am working on an iPhone app using a SQLite db. I have some French characters that are not rendering properly in the app - they are being displayed as squares. The character set client is: utf8. Is there an easy fix for this?

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• Using lattitude and longitude of the current location and destination location , how can we get the direction in iphone

  - by ratnasomu

  Hello Everyone , I am working in 1 iphone app where we need to show the direction from 1 place to other place That is from current location in which direction (N or E or W or S or NE or NW or SE or SW ) the destination is . I know how to get the directions from 1 place to another place but I am searching for showing the direction . Is my problem clear ? If any one know how to do it , Pleae help me Thanks every one!

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