2014/10/15 下午 10:08:33

iphone Programming Glossary: examples

How do I record audio on iPhone with AVAudioRecorder?

http://stackoverflow.com/questions/1010343/how-do-i-record-audio-on-iphone-with-avaudiorecorder

and not the older way of recording like the example SpeakHere shows. There are not any examples of how to best do this in the iPhone Dev Center and only reference to the classes. I am a newbie at.. Thanks in advance. iphone audio recording share improve this question Actually there are no examples at all. Here is my working code. Recording is triggered by the user pressing a button on the navBar...

Real-time Pitch Shifting on the iPhone

http://stackoverflow.com/questions/1100495/real-time-pitch-shifting-on-the-iphone

apps in the app store that do this so I know I am not the first one. However I cannot find any examples of it being done. iphone audio core audio pitch pitch tracking share improve this question you..

How do I make UILabel display outlined text?

http://stackoverflow.com/questions/1103148/how-do-i-make-uilabel-display-outlined-text

with the code below which I clumsily cobbled together from a few tangentially related online examples. And it works but it's very very slow except on the simulator and I couldn't get it to center the text..

Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application

http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application

Core Data stack happens to be created by the application delegate. Importantly however as all the examples show the stack principally the managed object context is not retrieved directly from the stack . Instead..

iPhone viewWillAppear not firing

http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing

add a view. I am fairly new to Cocoa and iPhone so it would be nice if there were useful examples from Apple besides the basic Hello World crap. Any help is greatly appreciated... iphone ios cocoa..

Tricks for improving iPhone UITableView scrolling performance?

http://stackoverflow.com/questions/1352479/tricks-for-improving-iphone-uitableview-scrolling-performance

if you have one Use the reusableCellIdentifier functionality as recommended by the UITableView examples documentation Avoid gradients complicated graphical effects that aren't pre baked into UIImage s share..

iPhone reachability checking

http://stackoverflow.com/questions/1861656/iphone-reachability-checking

reachability checking I've found several examples of code to do what I want check for reachability but none of it seems to be exact enough to be of use..

Drawing a route in mapkit in iphone sdk

http://stackoverflow.com/questions/2834523/drawing-a-route-in-mapkit-in-iphone-sdk

I am aware of sites on the internet which tell how to draw polylines on map. But most of the examples had a preloaded .csv file with various coordinates. Is there an alternate way to get the coordinates..

Does UIGestureRecognizer work on a UIWebView?

http://stackoverflow.com/questions/2909807/does-uigesturerecognizer-work-on-a-uiwebview

new Date .getTime This is only the second project I have used javascript with. You can find better examples elsewhere. As you can see this is no quick answer to your problem. I am pretty happy with the results..

Autoplay audio files on an iPad with HTML5

http://stackoverflow.com/questions/3009888/autoplay-audio-files-on-an-ipad-with-html5

and thats what I've used it for. Here is a javascript fake click solution http www.roblaplaca.com examples html5AutoPlay Copy Pasted Code from the site script type text javascript function fakeClick fn var..

Property Declaration and Automatic Backing Storage Allocation

http://stackoverflow.com/questions/3238009/property-declaration-and-automatic-backing-storage-allocation

versions of the iPhone simulator use the modern runtime but older ones don't. So while both code examples will work on actually iPhones synthesizing the necessary storage the second example will fail to compile..

Bold & Non-Bold Text In A Single UILabel?

http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel

is a couple of good introductory blog posts here from guys at invasivecode that explain with more examples uses of NSAttributedString look for Introduction to NSAttributedString for iOS 6 and Attributed strings..

Getting current device language in iOS?

http://stackoverflow.com/questions/3910244/getting-current-device-language-in-ios

for the currently selected language. en for English es for Spanish de for German etc. For more examples please see this Wikipedia entry in particular the 639 1 column List of ISO 639 1 codes Then it's a simple..

How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar

http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll

make sure I'm on the right path before I change too much code. I'm confused because so many of the examples are array based instead of CoreData. Here are some questions Do I need to have a second NSFetchedResultsController.. original predicate that was used to retrieve the FRC results in the first place If anyone has any examples of code using search with the FRC I would greatly appreciate it iphone search core data uisearchbar..

Example or explanation of Core Data Migration with multiple passes?

http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes

here. It can be found at Customizing the Migration Process it's just a merge of the first two code examples. The third and last part will be modified as follows Instead of using the class method of the NSMappingModel..

Understanding reference counting with Cocoa and Objective-C

http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c

Programming for Mac OS X 4th Edition by Aaron Hillegas a very well written book with lots of great examples. It reads like a tutorial. If you're truly diving in you could head to Big Nerd Ranch . This is a training..

File Upload to HTTP server in iphone programming

http://stackoverflow.com/questions/936855/file-upload-to-http-server-in-iphone-programming

Upload to HTTP server in iphone programming Can anyone provide me some links or examples to upload files to the HTTP server using iphone APIs. Thanks in Advance BP iphone http file upload..

Transforming a rectangle image into a quadrilateral using a CATransform3D

http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d

use as z z' w and w' coefficients p The following picture shows what I want to do Here are some examples of points 276.523 236.438 517.656 208.945 275.984 331.285 502.23 292.344 261.441 235.059 515.09 211.5..

How do I record audio on iPhone with AVAudioRecorder?

http://stackoverflow.com/questions/1010343/how-do-i-record-audio-on-iphone-with-avaudiorecorder

to record audio in my application but I want to use AVAudioRecorder and not the older way of recording like the example SpeakHere shows. There are not any examples of how to best do this in the iPhone Dev Center and only reference to the classes. I am a newbie at iPhone development so I am looking for a simple sample to get.. so I am looking for a simple sample to get me started. Thanks in advance. iphone audio recording share improve this question Actually there are no examples at all. Here is my working code. Recording is triggered by the user pressing a button on the navBar. The recording uses cd quality 44100 samples stereo 2 channels..

Real-time Pitch Shifting on the iPhone

http://stackoverflow.com/questions/1100495/real-time-pitch-shifting-on-the-iphone

could look at where this is done. There are many music and game apps in the app store that do this so I know I am not the first one. However I cannot find any examples of it being done. iphone audio core audio pitch pitch tracking share improve this question you can use dirac 2 from dsp dimension for pitch shifting on the..

How do I make UILabel display outlined text?

http://stackoverflow.com/questions/1103148/how-do-i-make-uilabel-display-outlined-text

around my white UILabel text. I got as far as subclassing UILabel with the code below which I clumsily cobbled together from a few tangentially related online examples. And it works but it's very very slow except on the simulator and I couldn't get it to center the text vertically either so I hard coded the y value on the last..

Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application

http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application

indeed doing so is likely to be counter productive. The Core Data stack happens to be created by the application delegate. Importantly however as all the examples show the stack principally the managed object context is not retrieved directly from the stack . Instead the context is passed to the first view controller and..

iPhone viewWillAppear not firing

http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing

to do this. What the hell does directly mean. How do you indirectly add a view. I am fairly new to Cocoa and iPhone so it would be nice if there were useful examples from Apple besides the basic Hello World crap. Any help is greatly appreciated... iphone ios cocoa touch share improve this question If you use a navigation..

Tricks for improving iPhone UITableView scrolling performance?

http://stackoverflow.com/questions/1352479/tricks-for-improving-iphone-uitableview-scrolling-performance

iPhone reachability checking

http://stackoverflow.com/questions/1861656/iphone-reachability-checking

reachability checking I've found several examples of code to do what I want check for reachability but none of it seems to be exact enough to be of use to me. I can't figure out why this doesn't want to play nice...

Drawing a route in mapkit in iphone sdk

http://stackoverflow.com/questions/2834523/drawing-a-route-in-mapkit-in-iphone-sdk

draw route as well as inform the distance from current location. I am aware of sites on the internet which tell how to draw polylines on map. But most of the examples had a preloaded .csv file with various coordinates. Is there an alternate way to get the coordinates from Google or any other provider as the location is selected..

Does UIGestureRecognizer work on a UIWebView?

http://stackoverflow.com/questions/2909807/does-uigesturerecognizer-work-on-a-uiwebview

touch.startY event.touches.item 0 .pageY touch.startT new Date .getTime This is only the second project I have used javascript with. You can find better examples elsewhere. As you can see this is no quick answer to your problem. I am pretty happy with the results I got. The html I was working with had no interactive elements..

Autoplay audio files on an iPad with HTML5

http://stackoverflow.com/questions/3009888/autoplay-audio-files-on-an-ipad-with-html5

online content. For Offline HTML sites it's a great feature and thats what I've used it for. Here is a javascript fake click solution http www.roblaplaca.com examples html5AutoPlay Copy Pasted Code from the site script type text javascript function fakeClick fn var a ' a href # id fakeClick a ' a.bind click function e e.preventDefault..

Property Declaration and Automatic Backing Storage Allocation

http://stackoverflow.com/questions/3238009/property-declaration-and-automatic-backing-storage-allocation

of code you wrote would not compile properly. The most recent versions of the iPhone simulator use the modern runtime but older ones don't. So while both code examples will work on actually iPhones synthesizing the necessary storage the second example will fail to compile for the simulator unless you have an up to date Xcode...

Bold & Non-Bold Text In A Single UILabel?

http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel

Now I am just being lazy so p _label setText text There is a couple of good introductory blog posts here from guys at invasivecode that explain with more examples uses of NSAttributedString look for Introduction to NSAttributedString for iOS 6 and Attributed strings for iOS using Interface Builder PS Above code it should..

Getting current device language in iOS?

http://stackoverflow.com/questions/3910244/getting-current-device-language-in-ios

objectAtIndex 0 This will return a two letter code for the currently selected language. en for English es for Spanish de for German etc. For more examples please see this Wikipedia entry in particular the 639 1 column List of ISO 639 1 codes Then it's a simple matter of converting the two letter codes to the string..

How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar

http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll

to retrieve the data for the primary TableView. I want to make sure I'm on the right path before I change too much code. I'm confused because so many of the examples are array based instead of CoreData. Here are some questions Do I need to have a second NSFetchedResultsController that retrieves only the matching items or can.. I just set the search predicate to nil Won't that kill the original predicate that was used to retrieve the FRC results in the first place If anyone has any examples of code using search with the FRC I would greatly appreciate it iphone search core data uisearchbar uisearchdisplaycontroller share improve this question I..

Example or explanation of Core Data Migration with multiple passes?

http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes

skip the boilerplate code for now. If you need it I'll post here. It can be found at Customizing the Migration Process it's just a merge of the first two code examples. The third and last part will be modified as follows Instead of using the class method of the NSMappingModel class mappingModelFromBundles forSourceModel destinationModel..

Understanding reference counting with Cocoa and Objective-C

http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c

you going Apple's introduction to memory management. Cocoa Programming for Mac OS X 4th Edition by Aaron Hillegas a very well written book with lots of great examples. It reads like a tutorial. If you're truly diving in you could head to Big Nerd Ranch . This is a training facility run by Aaron Hillegas the author of the book..

File Upload to HTTP server in iphone programming

http://stackoverflow.com/questions/936855/file-upload-to-http-server-in-iphone-programming

Upload to HTTP server in iphone programming Can anyone provide me some links or examples to upload files to the HTTP server using iphone APIs. Thanks in Advance BP iphone http file upload share improve this question The code below uses HTTP POST..

Transforming a rectangle image into a quadrilateral using a CATransform3D

http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d

of A' A x u but it did not work I'm not sure of what I should use as z z' w and w' coefficients p The following picture shows what I want to do Here are some examples of points 276.523 236.438 517.656 208.945 275.984 331.285 502.23 292.344 261.441 235.059 515.09 211.5 263.555 327.066 500.734 295 229.031 161.277 427.125 192.562..

How do I record audio on iPhone with AVAudioRecorder?

http://stackoverflow.com/questions/1010343/how-do-i-record-audio-on-iphone-with-avaudiorecorder

I want to use AVAudioRecorder and not the older way of recording like the example SpeakHere shows. There are not any examples of how to best do this in the iPhone Dev Center and only reference to the classes. I am a newbie at iPhone development so.. to get me started. Thanks in advance. iphone audio recording share improve this question Actually there are no examples at all. Here is my working code. Recording is triggered by the user pressing a button on the navBar. The recording uses..

Real-time Pitch Shifting on the iPhone

http://stackoverflow.com/questions/1100495/real-time-pitch-shifting-on-the-iphone

are many music and game apps in the app store that do this so I know I am not the first one. However I cannot find any examples of it being done. iphone audio core audio pitch pitch tracking share improve this question you can use dirac 2 from..

How do I make UILabel display outlined text?

http://stackoverflow.com/questions/1103148/how-do-i-make-uilabel-display-outlined-text

as subclassing UILabel with the code below which I clumsily cobbled together from a few tangentially related online examples. And it works but it's very very slow except on the simulator and I couldn't get it to center the text vertically either..

Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application

http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application

productive. The Core Data stack happens to be created by the application delegate. Importantly however as all the examples show the stack principally the managed object context is not retrieved directly from the stack . Instead the context is..

iPhone viewWillAppear not firing

http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing

mean. How do you indirectly add a view. I am fairly new to Cocoa and iPhone so it would be nice if there were useful examples from Apple besides the basic Hello World crap. Any help is greatly appreciated... iphone ios cocoa touch share improve..

Tricks for improving iPhone UITableView scrolling performance?

http://stackoverflow.com/questions/1352479/tricks-for-improving-iphone-uitableview-scrolling-performance

for the content view if you have one Use the reusableCellIdentifier functionality as recommended by the UITableView examples documentation Avoid gradients complicated graphical effects that aren't pre baked into UIImage s share improve this answer..

iPhone reachability checking

http://stackoverflow.com/questions/1861656/iphone-reachability-checking

reachability checking I've found several examples of code to do what I want check for reachability but none of it seems to be exact enough to be of use to me. I can't figure..

Drawing a route in mapkit in iphone sdk

http://stackoverflow.com/questions/2834523/drawing-a-route-in-mapkit-in-iphone-sdk

from current location. I am aware of sites on the internet which tell how to draw polylines on map. But most of the examples had a preloaded .csv file with various coordinates. Is there an alternate way to get the coordinates from Google or any..

Does UIGestureRecognizer work on a UIWebView?

http://stackoverflow.com/questions/2909807/does-uigesturerecognizer-work-on-a-uiwebview

.pageY touch.startT new Date .getTime This is only the second project I have used javascript with. You can find better examples elsewhere. As you can see this is no quick answer to your problem. I am pretty happy with the results I got. The html I..

Autoplay audio files on an iPad with HTML5

http://stackoverflow.com/questions/3009888/autoplay-audio-files-on-an-ipad-with-html5

it's a great feature and thats what I've used it for. Here is a javascript fake click solution http www.roblaplaca.com examples html5AutoPlay Copy Pasted Code from the site script type text javascript function fakeClick fn var a ' a href # id fakeClick..

Property Declaration and Automatic Backing Storage Allocation

http://stackoverflow.com/questions/3238009/property-declaration-and-automatic-backing-storage-allocation

The most recent versions of the iPhone simulator use the modern runtime but older ones don't. So while both code examples will work on actually iPhones synthesizing the necessary storage the second example will fail to compile for the simulator..

Bold & Non-Bold Text In A Single UILabel?

http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel

setText text There is a couple of good introductory blog posts here from guys at invasivecode that explain with more examples uses of NSAttributedString look for Introduction to NSAttributedString for iOS 6 and Attributed strings for iOS using Interface..

Getting current device language in iOS?

http://stackoverflow.com/questions/3910244/getting-current-device-language-in-ios

a two letter code for the currently selected language. en for English es for Spanish de for German etc. For more examples please see this Wikipedia entry in particular the 639 1 column List of ISO 639 1 codes Then it's a simple matter of converting..

How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar

http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll

I want to make sure I'm on the right path before I change too much code. I'm confused because so many of the examples are array based instead of CoreData. Here are some questions Do I need to have a second NSFetchedResultsController that.. Won't that kill the original predicate that was used to retrieve the FRC results in the first place If anyone has any examples of code using search with the FRC I would greatly appreciate it iphone search core data uisearchbar uisearchdisplaycontroller..

Example or explanation of Core Data Migration with multiple passes?

http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes

need it I'll post here. It can be found at Customizing the Migration Process it's just a merge of the first two code examples. The third and last part will be modified as follows Instead of using the class method of the NSMappingModel class mappingModelFromBundles..

Understanding reference counting with Cocoa and Objective-C

http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c

management. Cocoa Programming for Mac OS X 4th Edition by Aaron Hillegas a very well written book with lots of great examples. It reads like a tutorial. If you're truly diving in you could head to Big Nerd Ranch . This is a training facility run..

File Upload to HTTP server in iphone programming

http://stackoverflow.com/questions/936855/file-upload-to-http-server-in-iphone-programming

Transforming a rectangle image into a quadrilateral using a CATransform3D

http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d

sure of what I should use as z z' w and w' coefficients p The following picture shows what I want to do Here are some examples of points 276.523 236.438 517.656 208.945 275.984 331.285 502.23 292.344 261.441 235.059 515.09 211.5 263.555 327.066 500.734..

How to programmatically change the hue of UIImage?

http://stackoverflow.com/questions/11555071/how-to-programmatically-change-the-hue-of-uiimage

improve this question First you need to decide if you are making an image a fixed hue or rotating the existing hue . Examples of both are shown below. Fixed hue Fixing the hue can be done using the standard drawing tools just make sure the blend..

Where can I find examples of Quartz 2D drawing on the iPhone?

http://stackoverflow.com/questions/1677984/where-can-i-find-examples-of-quartz-2d-drawing-on-the-iphone

between Quartz and QuartzCore I have searched a lot over the internet but only able to find out the MAC OS with Quartz Examples. If any body has any Link URL for Examples of Quartz 2D using Iphone Developement which would be run in the Real Iphone.. a lot over the internet but only able to find out the MAC OS with Quartz Examples. If any body has any Link URL for Examples of Quartz 2D using Iphone Developement which would be run in the Real Iphone Device Also if possible than give the Link..

How to create a UIScrollView of infinite scrolling?

http://stackoverflow.com/questions/1845789/how-to-create-a-uiscrollview-of-infinite-scrolling

tricky... You don't need to define the specific size for the ScrollView..... Generally we use to define ....as per the Examples of Apple #define SCROLLVIEW_CONTENT_HEIGHT 460 #define SCROLLVIEW_CONTENT_WIDTH 320 which is of no use...if you need the..

Does my application “contain encryption”?

http://stackoverflow.com/questions/2135081/does-my-application-contain-encryption

for purposes other than those listed as exemptions under question 2 you need to submit for an ERN authorization . Examples of standard encryption are AES SSL https . This authorization requires that you submit an annual report to two U.S. Government..

understanding TTNavigator

http://stackoverflow.com/questions/2317754/understanding-ttnavigator

they are opening a class with @ tt photos for example. this works quite fine. the first thing is i saw some urls in TT Examples like @ tt photos 1 . is it possible to fetch this 1 in my photos class and say for example okay please open picture one..

SpeakHere sample can't play sound which loads from internet

http://stackoverflow.com/questions/293929/speakhere-sample-cant-play-sound-which-loads-from-internet

directly from the internet. I found the AudioFileStreamExample example useful which should be installed in Developer Examples CoreAudio Services AudioFileStreamExample Also Matt Gallagher has an article called Streaming and playing an MP3 stream..

Rich text editor library for iOS

http://stackoverflow.com/questions/3542463/rich-text-editor-library-for-ios

Bold & Non-Bold Text In A Single UILabel?

http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel

using NSAttributedString but I have no idea how to use that. Any ideas Apple achieves this in several of their apps Examples Screenshot Thanks Dom iphone objective c ipad nsattributedstring share improve this question Update for iOS6 In iOS6..

UISwitch in a UITableView cell

http://stackoverflow.com/questions/3770019/uiswitch-in-a-uitableview-cell

in a UITableView cell How can I embed a UISwitch on a UITableView cell Examples can be seen in the settings menu. My current solution UISwitch mySwitch UISwitch alloc init autorelease cell.accessoryView..

Fish Eye Effect With Core Animation?

http://stackoverflow.com/questions/3790238/fish-eye-effect-with-core-animation

With Core Animation I am trying to achieve an effect similar to the globe of the ABC News iPad app. Google Images Examples Is it possible to get this effect by transforming CALayers Or is this using OpenGL and fragment vertex shaders CALayer provides..

How safe is information contained within iPhone app compiled code?

http://stackoverflow.com/questions/3919765/how-safe-is-information-contained-within-iphone-app-compiled-code

if anyone out there had definitive knowledge one way or the other I do know that .plist files are readily available. Examples could be things like URL values kept in a string API key and secret values iphone objective c security decompiling share..

What is -[NSString sizeWithFont:forWidth:lineBreakMode:] good for?

http://stackoverflow.com/questions/455553/what-is-nsstring-sizewithfontforwidthlinebreakmode-good-for

forWidth lineBreakMode states explains it doesn't actually wrap the text to additional lines. So how would I use it Examples would help. iphone objective c cocoa touch share improve this question It works great for multi line strings as well...

What exactly does delegate do in xcode ios project?

http://stackoverflow.com/questions/7215698/what-exactly-does-delegate-do-in-xcode-ios-project

wants to abstract out the details on how to do work like retrieve data . Allow others to hook code into a pipeline. Examples UITableView a table view is just a control that knows how to render a list of cells. It handles all the heavy lifting of..

iOS:How to open camera with animation effect?

http://stackoverflow.com/questions/7625016/ioshow-to-open-camera-with-animation-effect

This could be somewhat tidious but try out downloading ZBar SDK which is .dmg file. and double click it. You will find Examples Folder. In that you will find 4 apps. Try out that app in Device only. You will find amazing CAMERA open with animation..

Any tutorials for using GData API to upload to video to youtube form iOS app?

http://stackoverflow.com/questions/7860923/any-tutorials-for-using-gdata-api-to-upload-to-video-to-youtube-form-ios-app

objectivec client.googlecode.com svn trunk ~ Desktop gdata objectivec and search inside ~ Desktop gdata objectivex Examples YoutubeSample. In this directory there is a project implementing login with Oauth2 upload of a video and more operations...

Using iOS 5 rich text editor

http://stackoverflow.com/questions/8012245/using-ios-5-rich-text-editor

have to make your own. Edit Try using this https github.com omnigroup OmniGroup tree master Frameworks OmniUI iPad Examples TextEditor . I haven't used it so I don't know how well it will work. Link from this question share improve this answer..

IOS 5 Storage Guidelines

http://stackoverflow.com/questions/8374006/ios-5-storage-guidelines

up by iCloud. Data that can be downloaded again or regenerated should be stored in the Library Caches directory. Examples of files you should put in the Caches directory include database cache files and downloadable content such as that used..

Application rejected because of not following iOS Data Storage Guidelines

http://stackoverflow.com/questions/8818117/application-rejected-because-of-not-following-ios-data-storage-guidelines

Converting a UIImage black'n white and not grayscale for using tesseract

http://stackoverflow.com/questions/9992078/converting-a-uiimage-blackn-white-and-not-grayscale-for-using-tesseract

lighting conditions. This is specifically designed to help with OCR applications so it might be the way to go here. Examples images from both types of filters can be found in this answer . Note that the roundtrip through UIImage is slower than handling..