¡@
2014/10/15 ¤U¤È 10:13:09
iphone Programming Glossary: readingParsing XML in iPhone [closed] http://stackoverflow.com/questions/1021102/parsing-xml-in-iphone share improve this question Please have a look at Touch XML a Objective C framework for reading and writing XML. It's usage is similar drop in replacement for Apple's NSXMLDocument which is not available..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage CGContexts have their y axis pointing up while in UIKit it points down. See the docs . Edit after reading code You also want to set the blend mode to replace before drawing the image since you want the image's..
UIImagePickerController and extracting EXIF data from existing photos http://stackoverflow.com/questions/1238838/uiimagepickercontroller-and-extracting-exif-data-from-existing-photos them enabling the app to extract the geodata from the selected photo. They seem to do this by reading the original file from the private var mobile Media DCIM 100APPLE folder and running it through an EXIF..
How can I get a writable path on the iPhone? http://stackoverflow.com/questions/1567134/how-can-i-get-a-writable-path-on-the-iphone or NSString filePath cachePath stringByAppendingPathComponent @ SomeTmpFile.png Use that path for reading or writing. Note that you can make subdirectories in either of those writable paths which one of the..
Does my application “contain encryption”? http://stackoverflow.com/questions/2135081/does-my-application-contain-encryption Does your product contain encryption I use https but only via NSURLConnection and UIWebView . My reading of this is that my app doesn't contain encryption but I'm wondering if this is spelled out anywhere...
Is MonoTouch now banned on the iPhone? [closed] http://stackoverflow.com/questions/2604033/is-monotouch-now-banned-on-the-iphone translation or compatibility layer or tool are prohibited . And makes the following observation My reading of this new language is that cross compilers such as the Flash to iPhone compiler in Adobe ™s upcoming..
What's the best way to find the user's Documents directory on an iPhone? http://stackoverflow.com/questions/272544/whats-the-best-way-to-find-the-users-documents-directory-on-an-iphone the best way to find the user's Documents directory on an iPhone I'm reading Erica Sadun's iPhone Developer's Cookbook and ran into a question. She says in the book that the way..
Is it even possible to change a UIButtons background color? http://stackoverflow.com/questions/2808888/is-it-even-possible-to-change-a-uibuttons-background-color
Install xCode 3.2.3 w/ iPhone SDK 4, get “Base SDK missing”, can't see other SDKs http://stackoverflow.com/questions/3161385/install-xcode-3-2-3-w-iphone-sdk-4-get-base-sdk-missing-cant-see-other-sdk specific Base SDK Missing problem. You can skip to the bottom for just the fix though I recommend reading all of this. I also recommend John Muchow's excellent take on this issue. If you are specifically interested..
How to send json data in the Http request using NSURLRequest http://stackoverflow.com/questions/4456966/how-to-send-json-data-in-the-http-request-using-nsurlrequest NSDictionary question jsonDict objectForKey @ question This isn't 100 clear and will take some re reading but everything should be here to get you started. And from what I can tell this is asynchronous. My..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events looking into a way in my iPhone app to poll every X minutes to check the data counters. After much reading of the Background Execution documentation and a few trial apps I'd dismissed this as impossible without..
Is there a way to make drawRect work right NOW? http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now or using one of the 'immediate' methods. Practical solutions ........................ For anyone reading in the future if you are actually unable to get this to work in production code because of the mystery.. you can break off a background thread manually or through an NSOperation. For manual background threading you can use NSThread detachNewThreadSelector @selector doWork toTarget self withObject nil or self performSelectorInBackground..
How to Sync iPhone Core Data with web server, and then push to other devices? http://stackoverflow.com/questions/5035132/how-to-sync-iphone-core-data-with-web-server-and-then-push-to-other-devices iphone ios core data sync data synchronization share improve this question I suggest carefully reading and implementing the sync strategy discussed by Dan Grover at iPhone 2009 conference available here..
Return to app behavior after phone call different in native code than UIWebView http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview and if I want to return to my application I have to do so manually. As far as I can tell from reading what others have said there is no way to change this behavior. Here is my question Is it true that it's..
Need to find Distance using Gyro+Accelerometer http://stackoverflow.com/questions/6647314/need-to-find-distance-using-gyroaccelerometer is not necessary for this but if you are measuring linear distances you can use the gyroscope reading to control that rotation of the device was not too large. If rotation was too strong make the user re..
http://stackoverflow.com/questions/8088473/url-encode-an-nsstring NULL CFStringRef unencodedString NULL CFStringRef @ ' @ # kCFStringEncodingUTF8 Some good reading about the subject Objective c iPhone percent encode a string Objective C url encoding http cybersam.com..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 glReadPixels in my benchmarks. I found that on my iPhone 4 glReadPixels was the bottleneck in reading 720p video frames for encoding to disk. It limited the encoding from taking place at anything more than.. reads allows me to encode 720p video at 20 FPS now and the bottleneck has moved from the pixel reading to the OpenGL ES processing and actual movie encoding parts of the pipeline. On an iPhone 4S this allows.. supportsFastTextureUpload CVPixelBufferRelease pixel_buffer Note that at no point here am I reading anything manually. Also the textures are natively in BGRA format which is what AVAssetWriters are optimized..
Parsing XML in iPhone [closed] http://stackoverflow.com/questions/1021102/parsing-xml-in-iphone
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage graphics quartz graphics share improve this question Yes CGContexts have their y axis pointing up while in UIKit it points down. See the docs . Edit after reading code You also want to set the blend mode to replace before drawing the image since you want the image's alpha value not the one which was in the context's buffer..
UIImagePickerController and extracting EXIF data from existing photos http://stackoverflow.com/questions/1238838/uiimagepickercontroller-and-extracting-exif-data-from-existing-photos able to read the original files and the EXIF data stored within them enabling the app to extract the geodata from the selected photo. They seem to do this by reading the original file from the private var mobile Media DCIM 100APPLE folder and running it through an EXIF library. However I can't work out a way of matching a photo..
How can I get a writable path on the iPhone? http://stackoverflow.com/questions/1567134/how-can-i-get-a-writable-path-on-the-iphone stringByAppendingPathComponent @ SomeDirectory SomeFile.txt or NSString filePath cachePath stringByAppendingPathComponent @ SomeTmpFile.png Use that path for reading or writing. Note that you can make subdirectories in either of those writable paths which one of the example string above is using assuming one has been created..
Does my application “contain encryption”? http://stackoverflow.com/questions/2135081/does-my-application-contain-encryption in severe penalties. For further information click here. Does your product contain encryption I use https but only via NSURLConnection and UIWebView . My reading of this is that my app doesn't contain encryption but I'm wondering if this is spelled out anywhere. Severe penalties doesn't sound pleasant at all so I think that's..
Is MonoTouch now banned on the iPhone? [closed] http://stackoverflow.com/questions/2604033/is-monotouch-now-banned-on-the-iphone that link to Documented APIs through an intermediary translation or compatibility layer or tool are prohibited . And makes the following observation My reading of this new language is that cross compilers such as the Flash to iPhone compiler in Adobe ™s upcoming Flash Professional CS5 release are prohibited. This also bans..
What's the best way to find the user's Documents directory on an iPhone? http://stackoverflow.com/questions/272544/whats-the-best-way-to-find-the-users-documents-directory-on-an-iphone the best way to find the user's Documents directory on an iPhone I'm reading Erica Sadun's iPhone Developer's Cookbook and ran into a question. She says in the book that the way to find the user's Documents directory is with the code NSHomeDirectory..
Is it even possible to change a UIButtons background color? http://stackoverflow.com/questions/2808888/is-it-even-possible-to-change-a-uibuttons-background-color
Install xCode 3.2.3 w/ iPhone SDK 4, get “Base SDK missing”, can't see other SDKs http://stackoverflow.com/questions/3161385/install-xcode-3-2-3-w-iphone-sdk-4-get-base-sdk-missing-cant-see-other-sdk going to explain why this is going on and then how fix the specific Base SDK Missing problem. You can skip to the bottom for just the fix though I recommend reading all of this. I also recommend John Muchow's excellent take on this issue. If you are specifically interested in the Xcode 3.2.4 upgrade which has a strongly related..
How to send json data in the Http request using NSURLRequest http://stackoverflow.com/questions/4456966/how-to-send-json-data-in-the-http-request-using-nsurlrequest NSDictionary jsonDict jsonString JSONValue NSDictionary question jsonDict objectForKey @ question This isn't 100 clear and will take some re reading but everything should be here to get you started. And from what I can tell this is asynchronous. My UI is not locked up while these calls are made. Hope that helps...
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events to poll for events For quite a while I'd been looking into a way in my iPhone app to poll every X minutes to check the data counters. After much reading of the Background Execution documentation and a few trial apps I'd dismissed this as impossible without abusing the background APIs. Last week I found this application..
Is there a way to make drawRect work right NOW? http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now that this applies to both doing it properly background look or using one of the 'immediate' methods. Practical solutions ........................ For anyone reading in the future if you are actually unable to get this to work in production code because of the mystery progressive slowdown ... Felz and Void have each presented.. needed a UI update to be performed. For older OS versions you can break off a background thread manually or through an NSOperation. For manual background threading you can use NSThread detachNewThreadSelector @selector doWork toTarget self withObject nil or self performSelectorInBackground @selector doWork withObject nil and..
How to Sync iPhone Core Data with web server, and then push to other devices? http://stackoverflow.com/questions/5035132/how-to-sync-iphone-core-data-with-web-server-and-then-push-to-other-devices kinds of frameworks should I look at to make this possible iphone ios core data sync data synchronization share improve this question I suggest carefully reading and implementing the sync strategy discussed by Dan Grover at iPhone 2009 conference available here as a pdf document. This is a viable solution and is not that..
Return to app behavior after phone call different in native code than UIWebView http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview string my iphone stays in the iphone's regular phone application and if I want to return to my application I have to do so manually. As far as I can tell from reading what others have said there is no way to change this behavior. Here is my question Is it true that it's impossible to return to an application after making a phone..
Need to find Distance using Gyro+Accelerometer http://stackoverflow.com/questions/6647314/need-to-find-distance-using-gyroaccelerometer
http://stackoverflow.com/questions/8088473/url-encode-an-nsstring encodedString NSString CFURLCreateStringByAddingPercentEscapes NULL CFStringRef unencodedString NULL CFStringRef @ ' @ # kCFStringEncodingUTF8 Some good reading about the subject Objective c iPhone percent encode a string Objective C url encoding http cybersam.com programming proper url percent encoding in ios https devforums.apple.com..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 down using glReadPixels . This is much much faster than using glReadPixels in my benchmarks. I found that on my iPhone 4 glReadPixels was the bottleneck in reading 720p video frames for encoding to disk. It limited the encoding from taking place at anything more than 8 9 FPS. Replacing this with the fast texture cache reads.. more than 8 9 FPS. Replacing this with the fast texture cache reads allows me to encode 720p video at 20 FPS now and the bottleneck has moved from the pixel reading to the OpenGL ES processing and actual movie encoding parts of the pipeline. On an iPhone 4S this allows you to write 1080p video at a full 30 FPS. My implementation.. pixel_buffer 0 if GPUImageOpenGLESContext supportsFastTextureUpload CVPixelBufferRelease pixel_buffer Note that at no point here am I reading anything manually. Also the textures are natively in BGRA format which is what AVAssetWriters are optimized to use when encoding video so there's no need to do..
Parsing XML in iPhone [closed] http://stackoverflow.com/questions/1021102/parsing-xml-in-iphone same iphone xml parsing share improve this question Please have a look at Touch XML a Objective C framework for reading and writing XML. It's usage is similar drop in replacement for Apple's NSXMLDocument which is not available for the iPhone..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage this question Yes CGContexts have their y axis pointing up while in UIKit it points down. See the docs . Edit after reading code You also want to set the blend mode to replace before drawing the image since you want the image's alpha value not..
UIImagePickerController and extracting EXIF data from existing photos http://stackoverflow.com/questions/1238838/uiimagepickercontroller-and-extracting-exif-data-from-existing-photos EXIF data stored within them enabling the app to extract the geodata from the selected photo. They seem to do this by reading the original file from the private var mobile Media DCIM 100APPLE folder and running it through an EXIF library. However..
How can I get a writable path on the iPhone? http://stackoverflow.com/questions/1567134/how-can-i-get-a-writable-path-on-the-iphone SomeFile.txt or NSString filePath cachePath stringByAppendingPathComponent @ SomeTmpFile.png Use that path for reading or writing. Note that you can make subdirectories in either of those writable paths which one of the example string above..
Does my application “contain encryption”? http://stackoverflow.com/questions/2135081/does-my-application-contain-encryption click here. Does your product contain encryption I use https but only via NSURLConnection and UIWebView . My reading of this is that my app doesn't contain encryption but I'm wondering if this is spelled out anywhere. Severe penalties doesn't..
Is MonoTouch now banned on the iPhone? [closed] http://stackoverflow.com/questions/2604033/is-monotouch-now-banned-on-the-iphone an intermediary translation or compatibility layer or tool are prohibited . And makes the following observation My reading of this new language is that cross compilers such as the Flash to iPhone compiler in Adobe ™s upcoming Flash Professional..
What's the best way to find the user's Documents directory on an iPhone? http://stackoverflow.com/questions/272544/whats-the-best-way-to-find-the-users-documents-directory-on-an-iphone the best way to find the user's Documents directory on an iPhone I'm reading Erica Sadun's iPhone Developer's Cookbook and ran into a question. She says in the book that the way to find the user's..
Is it even possible to change a UIButtons background color? http://stackoverflow.com/questions/2808888/is-it-even-possible-to-change-a-uibuttons-background-color
Install xCode 3.2.3 w/ iPhone SDK 4, get “Base SDK missing”, can't see other SDKs http://stackoverflow.com/questions/3161385/install-xcode-3-2-3-w-iphone-sdk-4-get-base-sdk-missing-cant-see-other-sdk and then how fix the specific Base SDK Missing problem. You can skip to the bottom for just the fix though I recommend reading all of this. I also recommend John Muchow's excellent take on this issue. If you are specifically interested in the Xcode..
How to send json data in the Http request using NSURLRequest http://stackoverflow.com/questions/4456966/how-to-send-json-data-in-the-http-request-using-nsurlrequest jsonString JSONValue NSDictionary question jsonDict objectForKey @ question This isn't 100 clear and will take some re reading but everything should be here to get you started. And from what I can tell this is asynchronous. My UI is not locked up..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events a while I'd been looking into a way in my iPhone app to poll every X minutes to check the data counters. After much reading of the Background Execution documentation and a few trial apps I'd dismissed this as impossible without abusing the background..
Is there a way to make drawRect work right NOW? http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now background look or using one of the 'immediate' methods. Practical solutions ........................ For anyone reading in the future if you are actually unable to get this to work in production code because of the mystery progressive slowdown.. older OS versions you can break off a background thread manually or through an NSOperation. For manual background threading you can use NSThread detachNewThreadSelector @selector doWork toTarget self withObject nil or self performSelectorInBackground..
How to Sync iPhone Core Data with web server, and then push to other devices? http://stackoverflow.com/questions/5035132/how-to-sync-iphone-core-data-with-web-server-and-then-push-to-other-devices make this possible iphone ios core data sync data synchronization share improve this question I suggest carefully reading and implementing the sync strategy discussed by Dan Grover at iPhone 2009 conference available here as a pdf document. This..
Return to app behavior after phone call different in native code than UIWebView http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview phone application and if I want to return to my application I have to do so manually. As far as I can tell from reading what others have said there is no way to change this behavior. Here is my question Is it true that it's impossible to return..
Need to find Distance using Gyro+Accelerometer http://stackoverflow.com/questions/6647314/need-to-find-distance-using-gyroaccelerometer dx dy dy dz dz Gyroscope is not necessary for this but if you are measuring linear distances you can use the gyroscope reading to control that rotation of the device was not too large. If rotation was too strong make the user re do the measurement...
http://stackoverflow.com/questions/8088473/url-encode-an-nsstring NULL CFStringRef unencodedString NULL CFStringRef @ ' @ # kCFStringEncodingUTF8 Some good reading about the subject Objective c iPhone percent encode a string Objective C url encoding http cybersam.com programming proper..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 much faster than using glReadPixels in my benchmarks. I found that on my iPhone 4 glReadPixels was the bottleneck in reading 720p video frames for encoding to disk. It limited the encoding from taking place at anything more than 8 9 FPS. Replacing.. the fast texture cache reads allows me to encode 720p video at 20 FPS now and the bottleneck has moved from the pixel reading to the OpenGL ES processing and actual movie encoding parts of the pipeline. On an iPhone 4S this allows you to write 1080p.. if GPUImageOpenGLESContext supportsFastTextureUpload CVPixelBufferRelease pixel_buffer Note that at no point here am I reading anything manually. Also the textures are natively in BGRA format which is what AVAssetWriters are optimized to use when..
Reading MP3 information using objective c http://stackoverflow.com/questions/1239460/reading-mp3-information-using-objective-c MP3 information using objective c I have mp3 files stored on the iPhone and I my application should to be able to read..
http://stackoverflow.com/questions/1388467/reading-epub-format ePub format I am trying to develop an iPhone application to read ePub files. Is there any framework available to develop..
Reading call history in iPhone OS http://stackoverflow.com/questions/144888/reading-call-history-in-iphone-os call history in iPhone OS I'm doing some research on the feasibility of an iPhone application and can't find any indication..
How to crossfade between 2 images on iPhone using Core Animation http://stackoverflow.com/questions/1550206/how-to-crossfade-between-2-images-on-iphone-using-core-animation to learn how to work with Core Animation animatable properties on iPhone not to learn how to crossfade images per se . Reading similar questions on SO leads me to believe it can be done by animating the .contents property of the UIImageView's layer..
Reading Open-XML documents in IOS http://stackoverflow.com/questions/2131430/reading-open-xml-documents-in-ios Open XML documents in IOS I have used the CGPDFDocument class to read .pdf documents and retrieve the # of pages or pull..
How to store custom objects in NSUserDefaults http://stackoverflow.com/questions/2315948/how-to-store-custom-objects-in-nsuserdefaults decoder decodeObjectForKey @ category self.subCategoryName decoder decodeObjectForKey @ subcategory return self Reading and writing from NSUserDefaults void saveCustomObject MyObject object key NSString key NSData encodedObject NSKeyedArchiver..
Reading binary image data from a web service into UIImage http://stackoverflow.com/questions/2360986/reading-binary-image-data-from-a-web-service-into-uiimage binary image data from a web service into UIImage I'm consuming a web service in my iPhone app. The web service method..
Reading PDF files as string through iPhone application http://stackoverflow.com/questions/2362393/reading-pdf-files-as-string-through-iphone-application PDF files as string through iPhone application I am facing some problem in iPhone application development for Reading PDF.. PDF files as string through iPhone application I am facing some problem in iPhone application development for Reading PDF . I have tried following code. I know I have used wrong methods for parsing parsing methods are just used for searching..
Recommended Reading for iPhone Core Animation http://stackoverflow.com/questions/2907068/recommended-reading-for-iphone-core-animation Reading for iPhone Core Animation Can anyone here recommend any good books for getting my head around Core animation I've been..
Reading iphone carrier's signal strength http://stackoverflow.com/questions/3279163/reading-iphone-carriers-signal-strength iphone carrier's signal strength Is this even possible If not I'm really suprised this hasn't been open thru the API yet...
Reading samples via AVAssetReader http://stackoverflow.com/questions/4049207/reading-samples-via-avassetreader samples via AVAssetReader How do you read samples via AVAssetReader I've found examples of duplicating or mixing using.. outputSettings dictionary asset_reader addOutput asset_reader_output Kick off the asset reader asset_reader startReading Read off the samples CMSampleBufferRef buffer while asset_reader status AVAssetReaderStatusReading buffer asset_reader_output..
iPhone App Development Tutorials (beginner) [closed] http://stackoverflow.com/questions/4765451/iphone-app-development-tutorials-beginner it's the official one. There's also AppCode and RubyMotion not an IDE . I personally really enjoy developing for iOS. Reading and writing a lot of code is the best way to learn. Pick some project and just start developing it that's a great hands..
Reading audio samples via AVAssetReader http://stackoverflow.com/questions/4972677/reading-audio-samples-via-avassetreader audio samples via AVAssetReader How do you read audio samples via AVAssetReader I've found examples of duplicating or mixing..
pdf file text reading and searching http://stackoverflow.com/questions/5103281/pdf-file-text-reading-and-searching Conceptual drawingwithquartz2d dq_pdf_scan dq_pdf_scan.html# apple_ref doc uid TP30001066 CH220 CJBDCGCB Reading PDF files as string through iPhone application Thanks shyam parmar iphone xcode ipad pdf ios4 share improve this question..
Problem setting exif data for an image http://stackoverflow.com/questions/5125323/problem-setting-exif-data-for-an-image using the following CFDictionaryRef metadataDict CMGetAttachment sampleBuffer kCGImagePropertyExifDictionary NULL Reading it out it appears valid. Saving an image out works but there is never any exif data in the image. CGImageDestinationRef..
Save An Image To Application Documents Folder From UIView On IOS http://stackoverflow.com/questions/6821517/save-an-image-to-application-documents-folder-from-uiview-on-ios @ image.png Add the file name pngData writeToFile filePath atomically YES Write the file Reading it later works the same way. Build the path like we just did above then NSData pngData NSData dataWithContentsOfFile filePath..
Most efficient way to draw part of an image in iOS http://stackoverflow.com/questions/8035673/most-efficient-way-to-draw-part-of-an-image-in-ios reading operation freely and it's fast. That means it assumes back end storage is located in memory near the CPU. Reading from GPU memory is usually very expensive slow. Maybe somewhat different on unified memory architecture but anyway initial..
http://stackoverflow.com/questions/905542/how-to-write-data-in-plist temp NSLog errorDesc errorDesc release temp setValue @ 123 forKey @ line1 temp writeToFile plistPath atomically YES Reading data from save.plist NSLog temp objectForKey @ name NSLog temp objectForKey @ wish NSNumber num temp valueForKey @ roll..
Reading HTML content from a UIWebView http://stackoverflow.com/questions/992348/reading-html-content-from-a-uiwebview HTML content from a UIWebView Is it possible to the raw HTML content of a web page that has been loaded into a UIWebView..
|