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2014/10/15 ¤U¤È 10:08:53
iphone Programming Glossary: fastDelete/Reset all entries in Core Data? http://stackoverflow.com/questions/1077810/delete-reset-all-entries-in-core-data or you won't be able to persist your changes. Just removing the store and recreating it is both fast and safe and can certainly be done programatically at runtime. Update for iOS5 With the introduction..
Comparison of JSON Parser for Objective-C (JSON Framework, YAJL, TouchJSON, etc) http://stackoverflow.com/questions/2256625/comparison-of-json-parser-for-objective-c-json-framework-yajl-touchjson-etc of NSString. In addition as far as I tested the result of performance comparison is as follows fast YAJL JSON Framework Touch JSON slow . If you know pros and cons of these JSON parsers could you tell.. question I had the same results as you for JSON Framework and TouchJSON. TouchJSON claims to be faster but my test with parsing one big 10K array objects JSON string was different JSON Framework was faster...
Starting iPhone app development in Linux? http://stackoverflow.com/questions/276907/starting-iphone-app-development-in-linux X and Xcode on a virtualised VMware machine on Linux. CPU is a Core2Quad Q8800 and it is perfectly fast. I found a prebuilt VM online I'll leave it to you to find Xcode iPhone development works perfectly..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework NOTE Program outputs to console results come out as 0.000 that's not an error it's just very very fast This code is really stupidly obscure it is generously commented but the comments don't actually make..
UITextView with Syntax Highlighting [duplicate] http://stackoverflow.com/questions/3642540/uitextview-with-syntax-highlighting 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..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints placeholder objects alternitively another design approach is this one Note that images will render faster than a CGPDFPageRef Use NSOperations or GCD Blocks to prepare pages ahead of time. call CGContextSetInterpolationQuality.. but I'm not sure Credit BrainFeeder CALayer and Off Screen Rendering render the next page for fast smooth display Documentation Quartz PDFObjects Used for meta info annotations thumbs Abobe PDF Spec..
Want to display a 3D model on the iPhone: how to get started? http://stackoverflow.com/questions/413919/want-to-display-a-3d-model-on-the-iphone-how-to-get-started started I started with no knowledge of xcode obj c iphone or mac and got to a working app fairly fast using mainly this . However I should add that I come from a fairly good background in C C and Java...
http://stackoverflow.com/questions/4847163/round-two-corners-in-uiview ways to do this. The first one is a bit more elegant the second one is a workaround but it's also fast. Both are based on CALayer masking. I've used both methods in a couple of projects last year then I.. you just need few lines of code. I put stuff in my viewController viewDidLoad method because it's faster but you can use it also in your custom UIView with the layoutSubviews method in example. void viewDidLoad.. can only see the upper rounded corner. I put the code just in the viewDidLoad method because it's faster but you can use it also in your custom UIView with the layoutSubviews method in example. void viewDidLoad..
iPhone smooth sketch drawing algorithm http://stackoverflow.com/questions/5076622/iphone-smooth-sketch-drawing-algorithm
Lazy load images in UITableViewCell http://stackoverflow.com/questions/531482/lazy-load-images-in-uitableviewcell Trying to cache images in an NSMutableDictionary object creates problems when the user scrolls fast. I am getting images only when scrolling completely stops and clearing out the cache on memory warning... due to size of images being cached and clears the cache before reloading. If scrolling is very fast it crashes. Any other suggestions are welcome iphone cocoa touch uitableview image lazy loading share..
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 alternative to glReadPixels in iPhone OpenGL ES 2.0 Is there any faster way to access the frame buffer than using glReadPixels I would need read only access to a small rectangular.. iphone ios opengl es opengl es 2.0 share improve this question As of iOS 5.0 there is now a faster way to grab data from OpenGL ES. It isn't readily apparent but it turns out that the texture cache.. apparent but it turns out that the texture cache support added in iOS 5.0 doesn't just work for fast upload of camera frames to OpenGL ES but it can be used in reverse to get quick access to the raw pixels..
Delete/Reset all entries in Core Data? http://stackoverflow.com/questions/1077810/delete-reset-all-entries-in-core-data you still need to make sure you retain referential integrity or you won't be able to persist your changes. Just removing the store and recreating it is both fast and safe and can certainly be done programatically at runtime. Update for iOS5 With the introduction of external binary storage allowsExternalBinaryDataStorage..
Comparison of JSON Parser for Objective-C (JSON Framework, YAJL, TouchJSON, etc) http://stackoverflow.com/questions/2256625/comparison-of-json-parser-for-objective-c-json-framework-yajl-touchjson-etc history and is widely used. Touch JSON parses NSData instead of NSString. In addition as far as I tested the result of performance comparison is as follows fast YAJL JSON Framework Touch JSON slow . If you know pros and cons of these JSON parsers could you tell me Lastly if you know any other JSON Parser please tell me...
Starting iPhone app development in Linux? http://stackoverflow.com/questions/276907/starting-iphone-app-development-in-linux question To provide a differing response I'm running OS X and Xcode on a virtualised VMware machine on Linux. CPU is a Core2Quad Q8800 and it is perfectly fast. I found a prebuilt VM online I'll leave it to you to find Xcode iPhone development works perfectly as does debugging via USB to the phone itself. It actually surprised..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework a xib but I'm 90 sure you don't need to bother with that. NOTE Program outputs to console results come out as 0.000 that's not an error it's just very very fast This code is really stupidly obscure it is generously commented but the comments don't actually make life any easier. Basically at the heart of it is vDSP_fft_zrip..
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 and to grab text input . Also features basic text replacements. Problem..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints rendering on TiledLayers init frequently used arrays with placeholder objects alternitively another design approach is this one Note that images will render faster than a CGPDFPageRef Use NSOperations or GCD Blocks to prepare pages ahead of time. call CGContextSetInterpolationQuality ctx kCGInterpolationHigh CGContextSetRenderingIntent.. some just show weird characters I guess it's an encoding issue but I'm not sure Credit BrainFeeder CALayer and Off Screen Rendering render the next page for fast smooth display Documentation Quartz PDFObjects Used for meta info annotations thumbs Abobe PDF Spec Example projects Apple ZoomingPDF zooming UIScrollView CATiledLayer..
Want to display a 3D model on the iPhone: how to get started? http://stackoverflow.com/questions/413919/want-to-display-a-3d-model-on-the-iphone-how-to-get-started programmer's iphone book which has enough information to get started I started with no knowledge of xcode obj c iphone or mac and got to a working app fairly fast using mainly this . However I should add that I come from a fairly good background in C C and Java. For your particular project perhaps take a look at this answer..
http://stackoverflow.com/questions/4847163/round-two-corners-in-uiview mask the subviews you could use CALayer masking. There are 2 ways to do this. The first one is a bit more elegant the second one is a workaround but it's also fast. Both are based on CALayer masking. I've used both methods in a couple of projects last year then I hope you can find something useful. Solution 1 First of all.. bitmapContext return the image return theImage Now you just need few lines of code. I put stuff in my viewController viewDidLoad method because it's faster but you can use it also in your custom UIView with the layoutSubviews method in example. void viewDidLoad Create the mask image you need calling the previous.. In this way the bottom rounded corners are hidden and you can only see the upper rounded corner. I put the code just in the viewDidLoad method because it's faster but you can use it also in your custom UIView with the layoutSubviews method in example. void viewDidLoad set the radius CGFloat radius 50.0 set the mask frame..
iPhone smooth sketch drawing algorithm http://stackoverflow.com/questions/5076622/iphone-smooth-sketch-drawing-algorithm
Lazy load images in UITableViewCell http://stackoverflow.com/questions/531482/lazy-load-images-in-uitableviewcell please tell me how to duplicate this behavior. Thanks. Edit Trying to cache images in an NSMutableDictionary object creates problems when the user scrolls fast. I am getting images only when scrolling completely stops and clearing out the cache on memory warning. But the app invariably gets a memory warning due to size.. on memory warning. But the app invariably gets a memory warning due to size of images being cached and clears the cache before reloading. If scrolling is very fast it crashes. Any other suggestions are welcome iphone cocoa touch uitableview image lazy loading share improve this question Loading the images on a background..
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 alternative to glReadPixels in iPhone OpenGL ES 2.0 Is there any faster way to access the frame buffer than using glReadPixels I would need read only access to a small rectangular rendering area in the frame buffer to process the.. but it seems that OpenGL ES 2.0 does not support them. iphone ios opengl es opengl es 2.0 share improve this question As of iOS 5.0 there is now a faster way to grab data from OpenGL ES. It isn't readily apparent but it turns out that the texture cache support added in iOS 5.0 doesn't just work for fast upload.. now a faster way to grab data from OpenGL ES. It isn't readily apparent but it turns out that the texture cache support added in iOS 5.0 doesn't just work for fast upload of camera frames to OpenGL ES but it can be used in reverse to get quick access to the raw pixels within an OpenGL ES texture. You can take advantage of..
Delete/Reset all entries in Core Data? http://stackoverflow.com/questions/1077810/delete-reset-all-entries-in-core-data referential integrity or you won't be able to persist your changes. Just removing the store and recreating it is both fast and safe and can certainly be done programatically at runtime. Update for iOS5 With the introduction of external binary..
Comparison of JSON Parser for Objective-C (JSON Framework, YAJL, TouchJSON, etc) http://stackoverflow.com/questions/2256625/comparison-of-json-parser-for-objective-c-json-framework-yajl-touchjson-etc parses NSData instead of NSString. In addition as far as I tested the result of performance comparison is as follows fast YAJL JSON Framework Touch JSON slow . If you know pros and cons of these JSON parsers could you tell me Lastly if you know.. share improve this question I had the same results as you for JSON Framework and TouchJSON. TouchJSON claims to be faster but my test with parsing one big 10K array objects JSON string was different JSON Framework was faster. Didn't know about..
Starting iPhone app development in Linux? http://stackoverflow.com/questions/276907/starting-iphone-app-development-in-linux I'm running OS X and Xcode on a virtualised VMware machine on Linux. CPU is a Core2Quad Q8800 and it is perfectly fast. I found a prebuilt VM online I'll leave it to you to find Xcode iPhone development works perfectly as does debugging via..
Entering background on iOS4 to play audio http://stackoverflow.com/questions/3161635/entering-background-on-ios4-to-play-audio on the applicationDidEnterBackground To me that wouldn't make sense since I am not saving state they do for me with fast app switching or really handling anything in the background other than audio which they say is supposed to be handled automagically...
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework to bother with that. NOTE Program outputs to console results come out as 0.000 that's not an error it's just very very fast This code is really stupidly obscure it is generously commented but the comments don't actually make life any easier. Basically..
streaming video FROM an iPhone http://stackoverflow.com/questions/3444791/streaming-video-from-an-iphone 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. Conversely if the connection is slow so upload is slower than recording managing delayed upload..
UITextView with Syntax Highlighting [duplicate] http://stackoverflow.com/questions/3642540/uitextview-with-syntax-highlighting 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..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints used arrays with placeholder objects alternitively another design approach is this one Note that images will render faster than a CGPDFPageRef Use NSOperations or GCD Blocks to prepare pages ahead of time. call CGContextSetInterpolationQuality.. it's an encoding issue but I'm not sure Credit BrainFeeder CALayer and Off Screen Rendering render the next page for fast smooth display Documentation Quartz PDFObjects Used for meta info annotations thumbs Abobe PDF Spec Example projects Apple..
Want to display a 3D model on the iPhone: how to get started? http://stackoverflow.com/questions/413919/want-to-display-a-3d-model-on-the-iphone-how-to-get-started information to get started I started with no knowledge of xcode obj c iphone or mac and got to a working app fairly fast using mainly this . However I should add that I come from a fairly good background in C C and Java. For your particular..
http://stackoverflow.com/questions/4847163/round-two-corners-in-uiview masking. There are 2 ways to do this. The first one is a bit more elegant the second one is a workaround but it's also fast. Both are based on CALayer masking. I've used both methods in a couple of projects last year then I hope you can find something.. return theImage Now you just need few lines of code. I put stuff in my viewController viewDidLoad method because it's faster but you can use it also in your custom UIView with the layoutSubviews method in example. void viewDidLoad Create the mask.. are hidden and you can only see the upper rounded corner. I put the code just in the viewDidLoad method because it's faster but you can use it also in your custom UIView with the layoutSubviews method in example. void viewDidLoad set the radius..
iPhone smooth sketch drawing algorithm http://stackoverflow.com/questions/5076622/iphone-smooth-sketch-drawing-algorithm
Lazy load images in UITableViewCell http://stackoverflow.com/questions/531482/lazy-load-images-in-uitableviewcell behavior. Thanks. Edit Trying to cache images in an NSMutableDictionary object creates problems when the user scrolls fast. I am getting images only when scrolling completely stops and clearing out the cache on memory warning. But the app invariably.. gets a memory warning due to size of images being cached and clears the cache before reloading. If scrolling is very fast it crashes. Any other suggestions are welcome iphone cocoa touch uitableview image lazy loading share improve this question..
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.. 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 live filters and effects to camera video Also what would be a good starting point to learn the Core Image.. 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 fast..
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 alternative to glReadPixels in iPhone OpenGL ES 2.0 Is there any faster way to access the frame buffer than using glReadPixels I would need read only access to a small rectangular rendering.. not support them. iphone ios opengl es opengl es 2.0 share improve this question As of iOS 5.0 there is now a faster way to grab data from OpenGL ES. It isn't readily apparent but it turns out that the texture cache support added in iOS.. ES. It isn't readily apparent but it turns out that the texture cache support added in iOS 5.0 doesn't just work for fast upload of camera frames to OpenGL ES but it can be used in reverse to get quick access to the raw pixels within an OpenGL..
How to correctly subclass UIControl? http://stackoverflow.com/questions/1245248/how-to-correctly-subclass-uicontrol or UISlider as base for subclassing but I want to go closer to UIControl since that's the source for what I want Fast and undelayed Touch coordinates. Any idea would be great iphone share improve this question I know this question is..
http://stackoverflow.com/questions/16337362/kvc-vs-fast-enumeration
Create UIActionSheet 'otherButtons' by passing in array, not varlist http://stackoverflow.com/questions/2384044/create-uiactionsheet-otherbuttons-by-passing-in-array-not-varlist @ Title Here delegate self cancelButtonTitle nil destructiveButtonTitle nil otherButtonTitles nil ObjC Fast Enumeration for NSString title in array actionSheet addButtonWithTitle title actionSheet addButtonWithTitle @ Cancel actionSheet.cancelButtonIndex..
iPhone UIScrollView Speed Check http://stackoverflow.com/questions/3719753/iphone-uiscrollview-speed-check Have these properties on your UIScrollViewDelegate CGPoint lastOffset NSTimeInterval lastOffsetCapture BOOL isScrollingFast Then have this code for your scrollViewDidScroll void scrollViewDidScroll UIScrollView scrollView CGPoint currentOffset.. distance 10 1000 in pixels per millisecond CGFloat scrollSpeed fabsf scrollSpeedNotAbs if scrollSpeed 0.5 isScrollingFast YES NSLog @ Fast else isScrollingFast NO NSLog @ Slow lastOffset currentOffset lastOffsetCapture currentTime And from.. in pixels per millisecond CGFloat scrollSpeed fabsf scrollSpeedNotAbs if scrollSpeed 0.5 isScrollingFast YES NSLog @ Fast else isScrollingFast NO NSLog @ Slow lastOffset currentOffset lastOffsetCapture currentTime And from this i'm getting..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints and Lean PDF Viewer for iPhone iPad iOs tips and hints There has been many Questions recently about drawing PDF's. Yes..
Fast, very lightweight algorithm for camera motion detection? http://stackoverflow.com/questions/4393841/fast-very-lightweight-algorithm-for-camera-motion-detection very lightweight algorithm for camera motion detection I'm working on an augmented reality app for iPhone that involves..
PVR textures versus PNG in OpenGL ES http://stackoverflow.com/questions/501956/pvr-textures-versus-png-in-opengl-es gradients. Image quality varies with content. 2 bit and 4 bit compression methods are available 3 or 4 color channels. Fast loading from disk no software decompression needed. Almost instant texture upload because it's an internal hardware format..
Animating custom-drawn UITableViewCell when entering edit mode http://stackoverflow.com/questions/742829/animating-custom-drawn-uitableviewcell-when-entering-edit-mode when entering edit mode Background First of all much gratitude to atebits for their very informative blog post Fast Scrolling in Tweetie with UITableView . The post explains in detail how the developers were able to squeeze as much scrolling..
iPhone GPS - Battery Draining Extremely Fast http://stackoverflow.com/questions/8689626/iphone-gps-battery-draining-extremely-fast GPS Battery Draining Extremely Fast We are developing an app that has heavy GPS usage and we are unable to optimize the battery life. Even when the device..
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