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2014/10/15 ¤U¤È 10:13:05
iphone Programming Glossary: quiteUIImagePickerController and extracting EXIF data from existing photos http://stackoverflow.com/questions/1238838/uiimagepickercontroller-and-extracting-exif-data-from-existing-photos against the first x pixels of each image. This seems a bit over the top though and probably quite slow. Any suggestions iphone cocoa touch gps uiimagepickercontroller exif share improve this question..
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec myClass setMyVar v 1 Because manually declaring and implementing every accessor method was quite annoying @property and @synthesize were introduced to automatically generate the accessor methods MyClass.h..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone First pick a JSON library to use I personally like TouchJSON but several others out there are quite nice as well. The complicated part although not very hard is to convert your managed objects into suitable..
Setting direction for UISwipeGestureRecognizer http://stackoverflow.com/questions/3319209/setting-direction-for-uiswipegesturerecognizer direction will always fail when more than 1 direction is allowed. You can see it for yourself quite easily when you output the value of 'direction' in the selector method ie void scrollViewSwiped UISwipeGestureRecognizer..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework # masquerading as a complex number. The documentation overview explains this packing. it is quite neat basically it allows the complex results of the transform to be packed into the same memory footprint..
Objective-c iPhone percent encode a string? http://stackoverflow.com/questions/3423545/objective-c-iphone-percent-encode-a-string and CFURLCreateStringByAddingPercentEscapes are inadequate. The NSString method misses quite a few characters and the CF function only lets you say which specific characters you want to escape...
UITextView with Syntax Highlighting [duplicate] http://stackoverflow.com/questions/3642540/uitextview-with-syntax-highlighting no text input no spell checking no replacements no highlights no no no no no. Just rendering. And quite a bit of work to make it fast on old devices with long texts. UITextInput Protocol Allows interaction..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie That lets you feed the writer input data from a CVPixelBuffer that ™s quite easy to create from a CGImage. writerInput appendSampleBuffer sampleBuffer 4 Finish the session writerInput..
parsing HTML on the iPhone [closed] http://stackoverflow.com/questions/405749/parsing-html-on-the-iphone a C or Objective C library for HTML parsing It needs to handle messy HTML code that won't quite validate. Does such a library exist or am I better off just trying to use regular expressions iphone.. iphone html parsing html content extraction share improve this question I found using hpple quite useful to parse messy HTML. Hpple project is a Objective C wrapper on the XPathQuery library for parsing..
http://stackoverflow.com/questions/4168327/what-is-nszombie
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer insertSublayer gradient atIndex 0 I'd like to add an inner shadow effect to it but I am not quite sure how to do this. I suppose I would be required to draw in drawRect however this would add the layer..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events Backgrounding 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...
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 solution introduced by Tom Swift.................. Tom Swift has explained the amazing idea of quite simply manipulating the run loop . Here's how you trigger the run loop NSRunLoop currentRunLoop runMode..
OpenGL Texture Coordinates in Pixel Space http://stackoverflow.com/questions/5879403/opengl-texture-coordinates-in-pixel-space made that allowed for this. glMatrixMode GL_TEXTURE seems like it might be involved but I'm not quite sure how to implement it. My end goal would be to accomplish something like this where the texture I'd..
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 multiple passes My iPhone app needs to migrate its core data store and some of the databases are quite large. Apple's documentation suggests using multiple passes to migrate data to reduce memory use. However..
program access to iPhone volume buttons http://stackoverflow.com/questions/772832/program-access-to-iphone-volume-buttons would reject your app straightaway if it uses any of the private APIs though should note here that quite some apps on the App Store use this already and are still there The only way to do this now is to have..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample closed As a beginner I'm struggling with iCloud. There are some samples but they are usually quite detailed on the developer forum there is one for iCloud and CoreData which is massive . The apple docs.. are OK but I still can't see the big picture. So please bear with me some of these questions are quite fundamental but possibly easy to answer. Context I have a very simple iCloud app running full sample..
How do you optionally use iPhone OS 3.0 features in a 2.0 compatible app? http://stackoverflow.com/questions/986589/how-do-you-optionally-use-iphone-os-3-0-features-in-a-2-0-compatible-app I experimented a bit with weak linking of the MapKit.framework weak_framework MapKit . I found it quite cumbersome since I had to trick the compiler linker to use the 2.0 SDK with all code except the one..
UIImagePickerController and extracting EXIF data from existing photos http://stackoverflow.com/questions/1238838/uiimagepickercontroller-and-extracting-exif-data-from-existing-photos selected. I'm considering making a table of hashes and matching against the first x pixels of each image. This seems a bit over the top though and probably quite slow. Any suggestions iphone cocoa touch gps uiimagepickercontroller exif share improve this question Have you took a look at this exif iPhone library http..
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec int v myClass myVar assuming myClass is an object of type MyClass. myClass setMyVar v 1 Because manually declaring and implementing every accessor method was quite annoying @property and @synthesize were introduced to automatically generate the accessor methods MyClass.h @interface MyClass NSObject int myVar @property nonatomic..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone objective c json core data share improve this question First pick a JSON library to use I personally like TouchJSON but several others out there are quite nice as well. The complicated part although not very hard is to convert your managed objects into suitable structures for the conversion. I wrote this real quick..
Setting direction for UISwipeGestureRecognizer http://stackoverflow.com/questions/3319209/setting-direction-for-uiswipegesturerecognizer the allowed directions . This means that checks for the actual direction will always fail when more than 1 direction is allowed. You can see it for yourself quite easily when you output the value of 'direction' in the selector method ie void scrollViewSwiped UISwipeGestureRecognizer recognizer . Filed a bug report #8276386..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework only the first one is actually two real numbers DC offset Nyquist # masquerading as a complex number. The documentation overview explains this packing. it is quite neat basically it allows the complex results of the transform to be packed into the same memory footprint as the real but weirdly packaged inputs. vDSP_fft_zrip..
Objective-c iPhone percent encode a string? http://stackoverflow.com/questions/3423545/objective-c-iphone-percent-encode-a-string I've found that both stringByAddingPercentEscapesUsingEncoding and CFURLCreateStringByAddingPercentEscapes are inadequate. The NSString method misses quite a few characters and the CF function only lets you say which specific characters you want to escape. The proper specification is to escape all characters except..
UITextView with Syntax Highlighting [duplicate] http://stackoverflow.com/questions/3642540/uitextview-with-syntax-highlighting s. However there is no user interaction. No text selection no text input no spell checking no replacements no highlights no no no no no. Just rendering. And quite a bit of work to make it fast on old devices with long texts. UITextInput Protocol Allows interaction with the keyboard and to grab text input . Also features basic..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie ¦] 3 Write some samples Or you can use AVAssetWriterInputPixelBufferAdaptor. That lets you feed the writer input data from a CVPixelBuffer that ™s quite easy to create from a CGImage. writerInput appendSampleBuffer sampleBuffer 4 Finish the session writerInput markAsFinished videoWriter endSessionAtSourceTime ¦]..
parsing HTML on the iPhone [closed] http://stackoverflow.com/questions/405749/parsing-html-on-the-iphone HTML on the iPhone closed Can anyone recommend a C or Objective C library for HTML parsing It needs to handle messy HTML code that won't quite validate. Does such a library exist or am I better off just trying to use regular expressions iphone html parsing html content extraction share improve this.. or am I better off just trying to use regular expressions iphone html parsing html content extraction share improve this question I found using hpple quite useful to parse messy HTML. Hpple project is a Objective C wrapper on the XPathQuery library for parsing HTML. Using it you can send an XPath query and receive..
http://stackoverflow.com/questions/4168327/what-is-nszombie
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer id RGB 130 0 140 CGColor id RGB 108 0 120 CGColor nil self.layer insertSublayer gradient atIndex 0 I'd like to add an inner shadow effect to it but I am not quite sure how to do this. I suppose I would be required to draw in drawRect however this would add the layer on top of other UIView objects since it's supposed to be..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events Backgrounding 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..
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 has #defines for all five methods. Truly astounding alternate solution introduced by Tom Swift.................. Tom Swift has explained the amazing idea of quite simply manipulating the run loop . Here's how you trigger the run loop NSRunLoop currentRunLoop runMode NSDefaultRunLoopMode beforeDate NSDate date This is a truly..
OpenGL Texture Coordinates in Pixel Space http://stackoverflow.com/questions/5879403/opengl-texture-coordinates-in-pixel-space but haven't been able to suss out what previous calls were made that allowed for this. glMatrixMode GL_TEXTURE seems like it might be involved but I'm not quite sure how to implement it. My end goal would be to accomplish something like this where the texture I'd be using within the atlas is in the upper left 48px square..
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 or explanation of Core Data Migration with multiple passes My iPhone app needs to migrate its core data store and some of the databases are quite large. Apple's documentation suggests using multiple passes to migrate data to reduce memory use. However the documentation is very limited and doesn't explain..
program access to iPhone volume buttons http://stackoverflow.com/questions/772832/program-access-to-iphone-volume-buttons from Apple Do not use this. Apple now uses some patch which would reject your app straightaway if it uses any of the private APIs though should note here that quite some apps on the App Store use this already and are still there The only way to do this now is to have an AVAudioPlayer prepared to play but not playing player..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample basics and code sample closed As a beginner I'm struggling with iCloud. There are some samples but they are usually quite detailed on the developer forum there is one for iCloud and CoreData which is massive . The apple docs are OK but I still can't see the big picture. So please bear.. one for iCloud and CoreData which is massive . The apple docs are OK but I still can't see the big picture. So please bear with me some of these questions are quite fundamental but possibly easy to answer. Context I have a very simple iCloud app running full sample code below . There is only one UITextView shown to the user..
How do you optionally use iPhone OS 3.0 features in a 2.0 compatible app? http://stackoverflow.com/questions/986589/how-do-you-optionally-use-iphone-os-3-0-features-in-a-2-0-compatible-app because there are customers who do not want to update yet. I experimented a bit with weak linking of the MapKit.framework weak_framework MapKit . I found it quite cumbersome since I had to trick the compiler linker to use the 2.0 SDK with all code except the one which uses MapKit. Has anybody more experience with this What..
UIImagePickerController and extracting EXIF data from existing photos http://stackoverflow.com/questions/1238838/uiimagepickercontroller-and-extracting-exif-data-from-existing-photos of hashes and matching against the first x pixels of each image. This seems a bit over the top though and probably quite slow. Any suggestions iphone cocoa touch gps uiimagepickercontroller exif share improve this question Have you took..
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec an object of type MyClass. myClass setMyVar v 1 Because manually declaring and implementing every accessor method was quite annoying @property and @synthesize were introduced to automatically generate the accessor methods MyClass.h @interface MyClass..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone improve this question First pick a JSON library to use I personally like TouchJSON but several others out there are quite nice as well. The complicated part although not very hard is to convert your managed objects into suitable structures for..
Setting direction for UISwipeGestureRecognizer http://stackoverflow.com/questions/3319209/setting-direction-for-uiswipegesturerecognizer checks for the actual direction will always fail when more than 1 direction is allowed. You can see it for yourself quite easily when you output the value of 'direction' in the selector method ie void scrollViewSwiped UISwipeGestureRecognizer..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework numbers DC offset Nyquist # masquerading as a complex number. The documentation overview explains this packing. it is quite neat basically it allows the complex results of the transform to be packed into the same memory footprint as the real but..
Objective-c iPhone percent encode a string? http://stackoverflow.com/questions/3423545/objective-c-iphone-percent-encode-a-string and CFURLCreateStringByAddingPercentEscapes are inadequate. The NSString method misses quite a few characters and the CF function only lets you say which specific characters you want to escape. The proper specification..
UITextView with Syntax Highlighting [duplicate] http://stackoverflow.com/questions/3642540/uitextview-with-syntax-highlighting No text selection no text input no spell checking no replacements no highlights no no no no no. Just rendering. And quite a bit of work to make it fast on old devices with long texts. UITextInput Protocol Allows interaction with the keyboard..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie you can use AVAssetWriterInputPixelBufferAdaptor. That lets you feed the writer input data from a CVPixelBuffer that ™s quite easy to create from a CGImage. writerInput appendSampleBuffer sampleBuffer 4 Finish the session writerInput markAsFinished..
parsing HTML on the iPhone [closed] http://stackoverflow.com/questions/405749/parsing-html-on-the-iphone closed Can anyone recommend a C or Objective C library for HTML parsing It needs to handle messy HTML code that won't quite validate. Does such a library exist or am I better off just trying to use regular expressions iphone html parsing html.. regular expressions iphone html parsing html content extraction share improve this question I found using hpple quite useful to parse messy HTML. Hpple project is a Objective C wrapper on the XPathQuery library for parsing HTML. Using it..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer 120 CGColor nil self.layer insertSublayer gradient atIndex 0 I'd like to add an inner shadow effect to it but I am not quite sure how to do this. I suppose I would be required to draw in drawRect however this would add the layer on top of other..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events Backgrounding 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..
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 astounding alternate solution introduced by Tom Swift.................. Tom Swift has explained the amazing idea of quite simply manipulating the run loop . Here's how you trigger the run loop NSRunLoop currentRunLoop runMode NSDefaultRunLoopMode..
OpenGL Texture Coordinates in Pixel Space http://stackoverflow.com/questions/5879403/opengl-texture-coordinates-in-pixel-space previous calls were made that allowed for this. glMatrixMode GL_TEXTURE seems like it might be involved but I'm not quite sure how to implement it. My end goal would be to accomplish something like this where the texture I'd be using within the..
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 Data Migration with multiple passes My iPhone app needs to migrate its core data store and some of the databases are quite large. Apple's documentation suggests using multiple passes to migrate data to reduce memory use. However the documentation..
program access to iPhone volume buttons http://stackoverflow.com/questions/772832/program-access-to-iphone-volume-buttons some patch which would reject your app straightaway if it uses any of the private APIs though should note here that quite some apps on the App Store use this already and are still there The only way to do this now is to have an AVAudioPlayer..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample basics and code sample closed As a beginner I'm struggling with iCloud. There are some samples but they are usually quite detailed on the developer forum there is one for iCloud and CoreData which is massive . The apple docs are OK but I still.. . The apple docs are OK but I still can't see the big picture. So please bear with me some of these questions are quite fundamental but possibly easy to answer. Context I have a very simple iCloud app running full sample code below . There..
How do you optionally use iPhone OS 3.0 features in a 2.0 compatible app? http://stackoverflow.com/questions/986589/how-do-you-optionally-use-iphone-os-3-0-features-in-a-2-0-compatible-app want to update yet. I experimented a bit with weak linking of the MapKit.framework weak_framework MapKit . I found it quite cumbersome since I had to trick the compiler linker to use the 2.0 SDK with all code except the one which uses MapKit. Has..
How do I run a universal app on the iPhone 3.1.3 simulator? http://stackoverflow.com/questions/2759229/how-do-i-run-a-universal-app-on-the-iphone-3-1-3-simulator of the question did I miss a setting somewhere iphone xcode build process ipad share improve this question Quite the opposite. A universal app runs the same binary on iPhone and iPad so you cannot use conditional compilation to differentiate..
iPhone iAds Not working on iPhone 4 http://stackoverflow.com/questions/4480618/iphone-iads-not-working-on-iphone-4 every time you request one and particularly outside the US are often quite a bit more likely not to receive one . Quite probably either what you're seeing is a coincidence or the particular ads that Apple happens to be running at the minute..
Point in Tilt Direction - iPhone http://stackoverflow.com/questions/5128861/point-in-tilt-direction-iphone from accelerometer to angles... the accelerometer doesn't provide the raw data in angles. How do get from the raw data Quite right I forgot to mention it sorry. This is an everyday problem... distanceFactor square root of x^2 y^2 z^2 angle X axis..
Breakdown of iOS versions being used [closed] http://stackoverflow.com/questions/5291823/breakdown-of-ios-versions-being-used speaking you do not have to worry about legacy nonsense. There's no NT Vista W97 etc here Forget legacy and move ahead Quite simply in the Apple universe paying customers do not hold on to legacy. You can assume Apple users are paying customers..
Wordpress Blog iPhone App Reader [closed] http://stackoverflow.com/questions/6702317/wordpress-blog-iphone-app-reader the json framework to parse this data once you get it into your app I found it through the Stanford iOS dev lectures . Quite easily converts a json string into a NSDictionary https github.com stig json framework As for loading all archives ideally..
Best approach for XML parsing on the iPhone http://stackoverflow.com/questions/842292/best-approach-for-xml-parsing-on-the-iphone until you download someone's comment stream containing 400 very long comments clocking in at about 600KB of raw data. Quite aside from the size of the resultant XML tree the memory allocated internally while creating that tree can be enormous...
NSScanner working on WiFi but not 3G http://stackoverflow.com/questions/8508311/nsscanner-working-on-wifi-but-not-3g way. Use something like libxml2 which comes built into the iPhone to actually parse the html and get stuff from it. Quite honestly your system could break with a small update or malfunction with the page. Enough with the ranting but if you decide..
Which toolkit for iPhone mobile webapps? http://stackoverflow.com/questions/917935/which-toolkit-for-iphone-mobile-webapps C to the Javascript environment right down to Objective C style syntax extensions to Javascript and reusing NIB files. Quite incredible . Wink xui Jo by Dave Balmer blog . Designed to work with PhoneGap it can be used to build web apps for iPhone..
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