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2014/10/15 ¤U¤Č 10:13:13
iphone Programming Glossary: reducedOptimized Image Loading in a UIScrollView http://stackoverflow.com/questions/1098234/optimized-image-loading-in-a-uiscrollview Also consider using PVRTC format images which will take the size down even further 8 1 reduction . This will greatly reduced the time it takes to read the images from disk . I apologize if any of this doesn't make sense. I don't see any issues with..
Fragment Shader - Average Luminosity http://stackoverflow.com/questions/12168072/fragment-shader-average-luminosity on iOS. Instead I did a multistage reduction similar to mipmap generation but with some slight tweaks. Each step down reduced the size of the image by a factor of four in both width and height rather than the normal factor of two used for mipmaps... you are starting with a Y channel luminance texture already but I was dealing with RGB images. Once the image had been reduced to a sufficiently small size I read the pixels from that back onto the CPU and did a last quick iteration over the remaining..
Cocoa Touch: When does an NSFetchedResultsController become necessary to manage a Core Data fetch? http://stackoverflow.com/questions/1263723/cocoa-touch-when-does-an-nsfetchedresultscontroller-become-necessary-to-manage would be to use it with every table view that has a Core Data backing. In every case I've used it for it significantly reduced the amount of code I had to write. Performance wise it can lead to a huge improvement as well. Rather than fetching in your..
When to call release on NSURLConnection delegate? http://stackoverflow.com/questions/1632168/when-to-call-release-on-nsurlconnection-delegate self By doing that your class the retain count would be increased by 1 when the connection starts and then would de reduced by 1 after the connection finishes loading fails or is canceled resulting in no memory leaks. The second option the one..
Image gallery and animations like Facebook http://stackoverflow.com/questions/16780843/image-gallery-and-animations-like-facebook nonatomic UIScrollView photoScroll @property nonatomic strong NSArray photosArray In .m file thumbHeight 73 2px is reduced for border thumbWidth 73 2px is reduced for border photosInRow 4 padding 4 xPos 0 yPos 0 You can change above values according.. nonatomic strong NSArray photosArray In .m file thumbHeight 73 2px is reduced for border thumbWidth 73 2px is reduced for border photosInRow 4 padding 4 xPos 0 yPos 0 You can change above values according to your need. Then populate with..
How to add a contact to the iPhone's Address Book from a Web Page? http://stackoverflow.com/questions/1773876/how-to-add-a-contact-to-the-iphones-address-book-from-a-web-page PHP file that creates the calendar event on the final webpage as easy as possible here is the vcal minimal of what I reduced it to. So all of the above as I said is not necessary to implement the contact download solution I just wanted to show you..
sqlite Indexing Performance Advice http://stackoverflow.com/questions/1862771/sqlite-indexing-performance-advice indexed. You then express your search in terms of this derived property using binary operators etc. I found doing this reduced our search from around 1 second to under 100ms. To make things clear I would suggest looking at the ADC example http developer.apple.com..
iPhone: how to get safari to recognize a vcard? http://stackoverflow.com/questions/1892373/iphone-how-to-get-safari-to-recognize-a-vcard PHP file that creates the calendar event on the final webpage as easy as possible here is the vcal minimal of what I reduced it to. So all of the above as I said is not necessary to implement the contact download solution I just wanted to show you..
Periodic iOS background location updates http://stackoverflow.com/questions/19042894/periodic-ios-background-location-updates minutes and because the locationManager hasn't been stopped backgroundTimeRemaining stays at its maximum value. This reduced battery consumption from ~10 per hour with constant kCLLocationAccuracyBest in the background to ~2 per hour on my device...
How to set the width of a cell in a UITableView in grouped style http://stackoverflow.com/questions/2539021/how-to-set-the-width-of-a-cell-in-a-uitableview-in-grouped-style of the tableView so that the table will be smaller. This will result in UITableView rendering the cell inside with the reduced width. A solution for this can look like this void viewWillAppear BOOL animated CGFloat tableBorderLeft 20 CGFloat tableBorderRight..
AVAudioPlayer Memory Leak - Media Player Framework http://stackoverflow.com/questions/2840637/avaudioplayer-memory-leak-media-player-framework . After suggestion from a ahmet emrah in this forum to add MediaPlayer framework the number of leaks reduced to one. And is there any way to completely get rid of it Thanks and regards krishnan. iphone avaudioplayer share improve..
http://stackoverflow.com/questions/3088624/support-legacy-iphone-users with 4.0 APIs but it would still be usable without them if you can conditionally use 4.0 APIs either by providing reduced functionality when on pre iOS 4.0 devices or by providing similar functionality while using different APIs when on pre 4.0..
http://stackoverflow.com/questions/3185626/ios4-fast-context-switching state how much dirty memory usages is good to go. In apple video it's mentioned that the dirty memory should be reduced as much as we can. But in my App I am using navigation controller to push and pop views. After moving from about 20 different..
CSS background image rendering differently on iPhone http://stackoverflow.com/questions/3884444/css-background-image-rendering-differently-on-iphone that has one sixteenth the number of pixels. JPEG images larger than 2 megapixels are subsampled ”that is decoded to a reduced size. JPEG subsampling allows the user to view images from the latest digital cameras. .. which I take to mean that Jpegs..
Levenshtein Distance Algorithm better than O(n*m)? http://stackoverflow.com/questions/4057513/levenshtein-distance-algorithm-better-than-onm Are you interested in reducing the time complexity or the space complexity The average time complexity can be reduced O n d^2 where n is the length of the longer string and d is the edit distance. If you are only interested in the edit distance..
UIWebView with just an image that should fit the whole view http://stackoverflow.com/questions/4667614/uiwebview-with-just-an-image-that-should-fit-the-whole-view whole view So the issue I'm having now is with UIWebViews displaying a single image. What I'd like is the image to be reduced if it doesn't fit the place and keep it's original size if not. So here is how I do it in a UIViewController void viewDidLoad..
setKeepAliveTimeout and BackgroundTasks http://stackoverflow.com/questions/4777499/setkeepalivetimeout-and-backgroundtasks rejected. EDIT As noted by Patrick in the comments the current amount of time the block is given to execute has been reduced from 30 seconds to 10 seconds with iOS 5. It's a good idea to keep an eye on these times whenever you re link your application..
How to protect app IPA from hacks if reverse engineering is possible http://stackoverflow.com/questions/6939222/how-to-protect-app-ipa-from-hacks-if-reverse-engineering-is-possible platforms suffer from similar vulnerabilities yet on the iPhone at least you have a somewhat closed environment and a reduced risk of being attacked with trojans and the like. The governments and security firms get hacked on a regular basis although..
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