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• encode-decode image data with base64

  - by haicnpmk44

  Hi Guys I am try to make iPhone application to encode-decode an images (NSData format). NSData imageData = UIImagePNGRepresentation(image);` How can I do, please give some source code. Thank you!

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• How to programmatically generate an audio podcast file?

  - by adib

  Hi Anybody know how to programmatically generate MP3 files with bookmarks that can be used in iTunes / iPod / iPhone / iPod touch? Specifically text bookmarks (bookmarks with titles) that the listener can skip to a specific point in time in the audio file. Also how to add the text transcription of the podcast's content. Even better if you have an example Cocoa code or library to write the MP3 file. Thanks.

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• XCode and developer tools

  - by Infinity

  Hello guys! I want to use the FileMerge utility on my mac, but it isn't installed. I searched in the google and there is written that it will be installed with the developer tools. So the big question is where can I find the developer tools, because I downloaded the iPhone SDK 3.2 beta 5, and installed it, but I can't found the download location of developer tools. Maybe can you help me?

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• how to retrieve data from app of In App purchase

  - by riteshkumar1905

  My IN App Purchase application is running fine in iPhone but My data is not retrieve from my app. so please give me the code to retrieve data from my app..

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• How do I create a view that persists through all other views and controllers?

  - by erickreutz

  I was wondering how I would go about creating a view that persists through all the over views and controllers in the application. Similarly to how Soundcloud does it with their music player in their iPhone app (See pic). No matter where you go in the application the music player view stays at the top below the toolbar.

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• Draw a cross at center of a UIImagePickerController.

  - by VansFannel

  Hello. I'm very new on iPhone development. I'm trying to draw a cross over the image obtained from camera. I'm using a custom ViewController that inherits from UIImagePickerController. When I star the application, I see the cross, but a few seconds after the cross disappears. Should I use cameraOverlayView? Thank you

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• Adding map overlays

  - by diana

  Hi all, I am using iPhone os4 for development. I need to add overlays to mapview. Apple now provides overlays as a new feature of os4. How can i add overlays.Any help will be greatly appreciated.

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• What is the best software for creating OpenGL ES models and textures?

  - by Gedeon

  Hi everybody What is best software for creating models , textures etc... for iphone development. From simplest to more complex programs. First thing that comes to my mind is blender , but I'm curious what everybody else is using and their opinions.

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• Why we send Push from Server Side ?

  - by Tharindu Madushanka

  Hi, Is there any possiblity to implement Push at iPhone Client if we know the DeviceToken. Why we cannot go for a client side Push Implementation ? And if we have cert as .p12 on client Documents Directory Tharindu.

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• Change texture opacity in OpenGL

  - by zoul

  Hello! This is hopefully a simple question: I have an OpenGL texture and would like to be able to change its opacity, how do I do that? The texture already has an alpha channel and blending works fine, but I want to be able to decrease the opacity of the whole texture, to fade it into the background. I have fiddled with glBlendFunc, but with no luck – it seems that I would need something like GL_SRC_ALPHA_MINUS_CONSTANT, which is not available. I am working on iPhone, with OpenGL ES.

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• How to resize a UIPresentationFormSheet?

  - by Sheehan Alam

  I am trying to display a modal view controller as a UIPresentationFormSheet. The view appears, but I can't seem to resize it. My XIB has the proper height & width, but it seems to get overridden when I call it like this: composeTweetController = [[ComposeTweet alloc] initWithNibName:@"ComposeTweet" bundle:nil]; composeTweetController.modalPresentationStyle = UIModalPresentationFormSheet; [self presentModalViewController:composeTweetController animated:TRUE]; Any thoughts? I am using the iPhone SDK 3.2 beta 4

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• how to transform GLImageProcessing example result to UIIMage

  - by ofllm

  hello,I'm a newbie on iphone develop,I get the example of GLIImageProcessing,and I want to do same image processing ,and now I want to know how to transform GLIImageProcessing example result like brightness to a UIImage,thank you.

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• How to add database layer in core data application

  - by aditya

  Hi all I am fairly new to core data technology and i searched a lot on how to add the database to a core data application.so can anybody guide me on how to integrate the database layer? i have seen the iphone tutorial on core data (i.e books example) but i am not able to understand how to .sqlite file has been included in that application

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• Could my iPad app be denied from the app store for using the Tapku library?

  - by Dr Dork

  I'd like to use the Tapku library to add a calander date picker control to my iPad app. I'm new to iPhone OS development and I'm still rusty on identifying the 3rd party tools and code that will get my iPad app denied from the app store. For those that have used the Tapku library, would using it in my iPad app violate any app store rules? Thanks so much in advance for your help. I'm going to continue researching this question right now.

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• How to view sqlite database by button press

  - by fai

  hye all, i have built a SQLite database and wanna to add into iphone app. already i have add it resource-add-x.sqlite and also add libsqlite3.0.dylib.framework but i don't know what is the showing code. I wanna to show the data in the db when user pressed button. Can anyone help me to give an example on how the db can be view when button is press??

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• Drawing formulas with Quartz 2d

  - by burki

  In my iPhone App I'd like to draw a few formulas. How can I manage that with quartz 2d? Is there a way to build formulas like for example in latex? Or are there any existing frameworks? Thanks.

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• Showing tokens in UITextField

  - by Miraaj

  Hi all, I want to get tokens appearance in UITextField as we have in NSTokenField ie. as soon as user enters some name in UITextField it gets enclosed within a token. We have this control in to-cc fields in mail in iPhone / iPod and I want to get similar feature in my application. Can anyone suggest me some solution for it?? Thanks, Miraaj

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• UIVideoAtPathIsCompatibleWithSavedPhotosAlbum generates error implicit declaration of function, why?

  - by just_another_coder

  In my project I am trying to save video to the iPhone after being taken by the camera. When I call the method: UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(path) It reports the error: Implicit declaration of function 'UIVideoAtPathIsCompatibleWithSavedPhotosAlbum' I've imported MobileCoreServices/UTCoreTypes.h I was previously using this same code for saving camera pictures, and it worked fine. In another class, in the same project, I am able to reference the UIKit method: UIImagePNGRepresentation() without any problems So why does it give me this error?

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• Difference between writing to file atomically and not

  - by Mark Szymanski

  What is the difference in writing to files atomically on the iPhone in objective-c and not, is there any performance difference between the two? Thanks in advance!

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• While connecting with LinkedIn from my native application i have got one message what it means?

  - by Ankit

  I have used LinkedIn in my Native iphone application and i have got the message below:I don't know what it means:The masage is"You have successfully authorised [AppName].Please return to your application and enter following security code to grant access: 61592 " please help me what should i do?

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• Objective-C Social Networking General Question

  - by ludo

  Hi, I've been developing application for Iphone and now I want to try to create appplication like social bookmarking but I didn't really find any help on the net. I will have a create a login/pass, retrieve data and display them. So I want to know what do I have to use to implement all of that for any social bookmarking website. If you have suggestion, idea, tutorial, you are welcome. thanks,

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• The move from IE6/XP to IE8/Win7 and its effect on ASP.NET applications

  - by user311020

  Hello, The company I work for is preparing for application testing in IE8. Previously we have been using IE6. Many of our web applications are written in .NET 1.0 and 1.1 with more recent apps written in 2.x and 3.x. I know IE8 has an IE7 compatibility mode and it says it has a quirks mode, but most of our apps were written for 6, which is not specifically mentioned. Compatibility is for 7, which had a compatibility for 6. I do not know if that is necessarily carried over to 8. In 6 quirks mode was to run 5.5 sites without a problem. With no deeper explanation on any of Microsoft's release notes does it mention quirks mode as 6 compliant or even 5.5, just a basis of what it is (specific DOCTYPEs or no DOCTYPEs). If anyone could shed some light on how sites and apps designed for IE6 should run in IE8 would be greatly appreciated. If anyone else has made a similar move how smooth was the transition? Thanks.

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• Set the accessibility attributes on UIBarButtonItem

  - by Tim Norman

  I am working on making my iPhone app accessible. I have several UIBarButtonItem objects in Interface Builder, and I cannot find any option to set the accessibility label or hint for these buttons. How can I set these attributes?

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• How to access the CGColor property of UIColor in CGContextSetFillColorWithColor?

  - by Azeworai

  CGContextSetFillColorWithColor(g, [UIColor greyColor].CGColor); I'm trying to follow O'Reilly's iPhone Game Development book on page 73 Chapter 3 but I'm running into a compile error that states error: request for member 'CGColor' in something not a structure or union According to the book's errata page this is an unconfirmed errata in the book. I'm hoping that someone could help me replace that line of code to something that works. The example project can be downloaded from sourceforge at this link.

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• How do I detect shake while movie is playing?

  - by intunejoe

  I have an iphone app where I am able to shake and play a random file with MPMoviePlayerController. But while the Movie Player is on the screen, it is unable to detect a shake. How can I get the Movie Player to detect shakes while playing? Thanks for your help!

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