2014/10/15 下午 10:12:56
iphone Programming Glossary: processingHow would I tint an image programatically on the iPhone? http://stackoverflow.com/questions/1117211/how-would-i-tint-an-image-programatically-on-the-iphone drawInRect rect blendMode kCGBlendModeOverlay alpha 1.0 draw image iphone cocoa touch image processing share improve this question First you'll want to subclass UIImageView and override the drawRect..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale image CGContextRelease context return rawData UIImage processImage UIImage pImage DebugLog @ processing image unsigned char rawData self getBytesForImage pImage NSUInteger width pImage.size.width NSUInteger..
How to call Objective-C from Javascript? http://stackoverflow.com/questions/1662473/how-to-call-objective-c-from-javascript
Detecting which UIButton was pressed in a UITableView http://stackoverflow.com/questions/1802707/detecting-which-uibutton-was-pressed-in-a-uitableview id sender UIButton button UIButton sender how do I know which button sent this message processing button press for this row requires an indexPath. What's the standard way of doing this Edit I've kinda..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application handle particular document types and any application that uses a document controller can hand off processing of these documents to your own application. For example my application Molecules for which the source.. When the attachment is opened your application will be started and you will need to handle the processing of this file in your application didFinishLaunchingWithOptions application delegate method. It appears..
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 of drawRect on your ipop you will know that of course drawRect will not actually run until all processing is finished. setNeedsDisplay flags a view as invalidated and the OS in a word waits until all processing.. is finished. setNeedsDisplay flags a view as invalidated and the OS in a word waits until all processing is done. This can be infuriating in the common situation where you want to have a view controller 1.. work and then updating the UI when done. Also my Molecules application uses background threads for processing new structures with a status bar that is updated as this progresses. You can download the source code..
iPhone smooth sketch drawing algorithm http://stackoverflow.com/questions/5076622/iphone-smooth-sketch-drawing-algorithm to improve the drawing tobe more like Sketch Book App I think there is something to do with signal processing algorithm to rearrange all the points in the array but I am not sure. Any Help would be much appreciated...
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop of bounds or otherwise just not work correctly. Thank you SO much for your help. iphone ios image processing core graphics share improve this question I needed the same thing in my case to pick the dimension..
UIScrollView pauses NSTimer until scrolling finishes http://stackoverflow.com/questions/605027/uiscrollview-pauses-nstimer-until-scrolling-finishes timers to fire while scrolling since timers are processed as part of the event loop if you're busy processing scrolling your view you never get around to the timers. Though the perf battery penalty of running timers..
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 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..
How would I tint an image programatically on the iPhone? http://stackoverflow.com/questions/1117211/how-would-i-tint-an-image-programatically-on-the-iphone context rect draw base UIImage imageNamed @ someImage.png drawInRect rect blendMode kCGBlendModeOverlay alpha 1.0 draw image iphone cocoa touch image processing share improve this question First you'll want to subclass UIImageView and override the drawRect method. Your class needs a UIColor property let's call it overlayColor..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale colorSpace CGContextDrawImage context CGRectMake 0 0 width height image CGContextRelease context return rawData UIImage processImage UIImage pImage DebugLog @ processing image unsigned char rawData self getBytesForImage pImage NSUInteger width pImage.size.width NSUInteger height pImage.size.height DebugLog @ width d width DebugLog..
How to call Objective-C from Javascript? http://stackoverflow.com/questions/1662473/how-to-call-objective-c-from-javascript
Detecting which UIButton was pressed in a UITableView http://stackoverflow.com/questions/1802707/detecting-which-uibutton-was-pressed-in-a-uitableview to somehow tag the indexPath onto the control. void buttonPressedAction id sender UIButton button UIButton sender how do I know which button sent this message processing button press for this row requires an indexPath. What's the standard way of doing this Edit I've kinda solved it by doing the following. I would still like to have..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application custom URL schemes. You can register your application to handle particular document types and any application that uses a document controller can hand off processing of these documents to your own application. For example my application Molecules for which the source code is available handles the .pdb and .pdb.gz file types.. a list of applications that can open a particular attachment. When the attachment is opened your application will be started and you will need to handle the processing of this file in your application didFinishLaunchingWithOptions application delegate method. It appears that files loaded in this manner from Mail are copied into..
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 If you are an advanced user of drawRect on your ipop you will know that of course drawRect will not actually run until all processing is finished. setNeedsDisplay flags a view as invalidated and the OS in a word waits until all processing is done. This can be infuriating in the common situation.. of course drawRect will not actually run until all processing is finished. setNeedsDisplay flags a view as invalidated and the OS in a word waits until all processing is done. This can be infuriating in the common situation where you want to have a view controller 1 starts some function 2 which incrementally 3 creates a more..
iPhone smooth sketch drawing algorithm http://stackoverflow.com/questions/5076622/iphone-smooth-sketch-drawing-algorithm context UIGraphicsPushContext context And now I want to improve the drawing tobe more like Sketch Book App I think there is something to do with signal processing algorithm to rearrange all the points in the array but I am not sure. Any Help would be much appreciated. Thankz in advance iphone drawing quartz graphics share..
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop to smash the image be upside down look like crap draw out of bounds or otherwise just not work correctly. Thank you SO much for your help. iphone ios image processing core graphics share improve this question I needed the same thing in my case to pick the dimension that fits once scaled and then crop each end to fit the rest..
UIScrollView pauses NSTimer until scrolling finishes http://stackoverflow.com/questions/605027/uiscrollview-pauses-nstimer-until-scrolling-finishes have to run another thread and another run loop if you want timers to fire while scrolling since timers are processed as part of the event loop if you're busy processing scrolling your view you never get around to the timers. Though the perf battery penalty of running timers on other threads might not be worth handling this case...
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 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 can be found within the..
How would I tint an image programatically on the iPhone? http://stackoverflow.com/questions/1117211/how-would-i-tint-an-image-programatically-on-the-iphone @ someImage.png drawInRect rect blendMode kCGBlendModeOverlay alpha 1.0 draw image iphone cocoa touch image processing share improve this question First you'll want to subclass UIImageView and override the drawRect method. Your class needs..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale 0 0 width height image CGContextRelease context return rawData UIImage processImage UIImage pImage DebugLog @ processing image unsigned char rawData self getBytesForImage pImage NSUInteger width pImage.size.width NSUInteger height pImage.size.height..
How to call Objective-C from Javascript? http://stackoverflow.com/questions/1662473/how-to-call-objective-c-from-javascript
Detecting which UIButton was pressed in a UITableView http://stackoverflow.com/questions/1802707/detecting-which-uibutton-was-pressed-in-a-uitableview void buttonPressedAction id sender UIButton button UIButton sender how do I know which button sent this message processing button press for this row requires an indexPath. What's the standard way of doing this Edit I've kinda solved it by doing..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application your application to handle particular document types and any application that uses a document controller can hand off processing of these documents to your own application. For example my application Molecules for which the source code is available.. particular attachment. When the attachment is opened your application will be started and you will need to handle the processing of this file in your application didFinishLaunchingWithOptions application delegate method. It appears that files loaded..
Behaviour for significant change location API when terminated/suspended? http://stackoverflow.com/questions/3421242/behaviour-for-significant-change-location-api-when-terminated-suspended point you create your CLLocationManager call startMonitoringSignificantLocationChanges and do your background location processing for a limited time . So I am fine with this bit. The previous paragraph only talks about what happens when the app is terminated.. Do I just need to implement code in my didUpdateToLocation message which checks the application state and does minimal processing if in background mode In the process of writing this up I think I may have just answered my own question but it would be.. the applicationState and do limited work for the case where you are woken from a suspended state to do location processing. UIApplication sharedApplication .applicationState UIApplicationStateBackground I came to this conclusion with a location..
streaming video FROM an iPhone http://stackoverflow.com/questions/3444791/streaming-video-from-an-iphone advantages over frame by frame upload The files can be directly used for HTTP live streaming without any server side processing. The gap between data transfers allow the antennas to sleep in between if the connection is fast enough saving battery life...
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 are an advanced user of drawRect on your ipop you will know that of course drawRect will not actually run until all processing is finished. setNeedsDisplay flags a view as invalidated and the OS in a word waits until all processing is done. This can.. run until all processing is finished. setNeedsDisplay flags a view as invalidated and the OS in a word waits until all processing is done. This can be infuriating in the common situation where you want to have a view controller 1 starts some function.. background work and then updating the UI when done. Also my Molecules application uses background threads for processing new structures with a status bar that is updated as this progresses. You can download the source code to see how I achieved..
iPhone smooth sketch drawing algorithm http://stackoverflow.com/questions/5076622/iphone-smooth-sketch-drawing-algorithm And now I want to improve the drawing tobe more like Sketch Book App I think there is something to do with signal processing algorithm to rearrange all the points in the array but I am not sure. Any Help would be much appreciated. Thankz in advance..
http://stackoverflow.com/questions/5214197/simple-iphone-motion-detect interested in knowing that a slight motion was made as you stated you can omit rotation handling and narrow signal processing on CMDeviceMotion.userAcceleration. This is because every rotation results in accelerometer signals as well. Create a CMDeviceMotionHandler..
Creating a JSON Store For iPhone http://stackoverflow.com/questions/5237943/creating-a-json-store-for-iphone have no relationships between themselves and the cards have no behaviors. SQL or other procedural DBs are very good at processing large amounts of low complexity information. If the data is simple then SQL can handle even highly volatile data efficiently...
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop like crap draw out of bounds or otherwise just not work correctly. Thank you SO much for your help. iphone ios image processing core graphics share improve this question I needed the same thing in my case to pick the dimension that fits once scaled..
UIScrollView pauses NSTimer until scrolling finishes http://stackoverflow.com/questions/605027/uiscrollview-pauses-nstimer-until-scrolling-finishes loop if you want timers to fire while scrolling since timers are processed as part of the event loop if you're busy processing scrolling your view you never get around to the timers. Though the perf battery penalty of running timers on other threads..
Are the Core Image filters in iOS 5.0 fast enough for realtime video processing? http://stackoverflow.com/questions/6625888/are-the-core-image-filters-in-ios-5-0-fast-enough-for-realtime-video-processing the Core Image filters in iOS 5.0 fast enough for realtime video processing Now that Apple has ported the Core Image framework over to iOS 5.0 I'm wondering is Core Image is fast enough to apply.. will certainly vary with more complex operations. This would seem to indicate that Core Image cannot do live processing fast enough to match the iPhone's camera rate on the iPhone 4 running iOS 5 but as of iOS 6 it processes video more than.. the video for WWDC 2011 Session 422 Using Core Image on iOS and Mac OS X. Core Image mostly uses the GPU for image processing so you could look at how fast OpenGL ES 2.0 shaders handle image processing on existing devices. I did some work in this..
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 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...
how to parse the attributes like in this xml file through xml parser http://stackoverflow.com/questions/10877374/how-to-parse-the-attributes-like-in-this-xml-file-through-xml-parser @ isbn integerValue NSLog @ Reading isbn value @ aBook.isbn NSLog @ Reading id value i aBook.bookID NSLog @ Processing Element @ elementName iphone xml parsing share improve this question First take a bool variable. and then write the..
http://stackoverflow.com/questions/11983514/how-to-parse-simple-xml NSDictionary attributeDict if elementName isEqualToString @ NewDataSet caseID_List NSMutableArray alloc init NSLog @ Processing Element @ elementName if elementName isEqualToString @ CaseId void parser NSXMLParser parser foundCharacters NSString string.. currentElementValue NSMutableString alloc initWithString string else currentElementValue appendString string NSLog @ Processing Value @ currentElementValue void parser NSXMLParser parser didEndElement NSString elementName namespaceURI NSString namespaceURI..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale colors float red rawData byteIndex 255.f float green rawData byteIndex 1 255.f float blue rawData byteIndex 2 255.f Processing pixel data float averageColor red green blue 3.0f red averageColor green averageColor blue averageColor Assigning new color..
Common multithreading mistakes beginners make on iPhone http://stackoverflow.com/questions/1357108/common-multithreading-mistakes-beginners-make-on-iphone release editPhotoData3 release editPhotoData4 release break This is the edited photo that has been onscreen. Processing is now done so it is okay to release it. The UI should be updated and now have a blank black background instead of the image...
How to detect sound frequency for particular sound in iphone? http://stackoverflow.com/questions/13950358/how-to-detect-sound-frequency-for-particular-sound-in-iphone database. Some pointers to the type of signal processing required might be answered here Music Recognition and Signal Processing This is non trivial stuff more suited for multiple college textbook chapters than any short tutorial. share improve this..
iOS NSXMLParsing unformed HTML http://stackoverflow.com/questions/14861674/ios-nsxmlparsing-unformed-html NSString string if currentHTMLElement currentHTMLElement NSMutableString alloc initWithString string NSLog @ Processing Value @ currentHTMLElement void parser NSXMLParser parser didEndElement NSString elementName namespaceURI NSString namespaceURI..
How to detect objects from Image Processing in iOS? http://stackoverflow.com/questions/16355878/how-to-detect-objects-from-image-processing-in-ios to detect objects from Image Processing in iOS I have a image and the image have in it A glass a cup two spoon. This image is showing on the iPad. Now I want when..
Audio Processing: Playing with volume level http://stackoverflow.com/questions/3982723/audio-processing-playing-with-volume-level Processing Playing with volume level I want to read a sound file from application bundle copy it play with its maximum volume level..
MIDI player/synthesizer library for the iPhone http://stackoverflow.com/questions/449057/midi-player-synthesizer-library-for-the-iphone
How to develop an iphone app with reverb functionality? http://stackoverflow.com/questions/4750032/how-to-develop-an-iphone-app-with-reverb-functionality to develop an iphone app with reverb functionality I am developing an iPhone application like Audio Processing . I have to give some effect to the audios. If it is desktop app many options are there. We can get good examples and full..
Edge Detection of Image in iPhone Using Image Magick http://stackoverflow.com/questions/5037502/edge-detection-of-image-in-iphone-using-image-magick Image into Image 2. Here is below two images. I would like to use Only ImageMagick Library. I would like to do Image Processing simillar to this Link in Objective C. iphone ios ios4 imagemagick share improve this question @Apoorv i dont know any..
Building openears compatible language model http://stackoverflow.com/questions/5220661/building-openears-compatible-language-model class which uses the MITLM library and NSScanner to accomplish the same task as the CMU toolkit mentioned above. Processing a corpus with 5000 words on the iPhone is going to take a very long time but you could always use the Simulator to run it..
iPhone:Programmatically compressing recorded video to share? http://stackoverflow.com/questions/5687341/iphoneprogrammatically-compressing-recorded-video-to-share else NSLog @ Video Capture Error Captured video cannot be saved...didFinishPickingMediaWithInfo else NSLog @ Processing soon to saved photos album...else loop of lastPathComponent..didFinishPickingMediaWithInfo self dismissModalViewControllerAnimated..
How to POST an object to rails using RestKit? http://stackoverflow.com/questions/8409115/how-to-post-an-object-to-rails-using-restkit up The title I put in was Made from the iPhone 2 Started POST lists for 129.21.86.32 at 2011 12 07 09 34 43 0500 Processing by ListsController#create as JSON Parameters id 0 title Made from the iPhone 2 list id 0 title Made from the iPhone 2 WARNING..
Create User in Devise from JSON http://stackoverflow.com/questions/8841946/create-user-in-devise-from-json sent off. The server gets it and this is the log Started POST users.json for 129.21.84.10 at 2012 01 12 15 33 57 0500 Processing by Devise RegistrationsController#create as JSON Parameters password FILTERED password_confirmation FILTERED email test1@test.com..
How to remove parsing and NSPlaceholderMutableString frame Leaks in iPhone [closed] http://stackoverflow.com/questions/8860576/how-to-remove-parsing-and-nsplaceholdermutablestring-frame-leaks-in-iphone valueForKey @ lng aMarker.phone NSMutableString alloc initWithString attributeDict valueForKey @ phone NSLog @ Processing Element @ elementName void dealloc aMarker release currentElementValue release super dealloc Updated code void parser NSXMLParser..
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