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2014/10/15 ¤U¤È 10:13:31
iphone Programming Glossary: routinesiPhone - Why does the documentation say UIImageView is NSCoding compliant? http://stackoverflow.com/questions/1072700/iphone-why-does-the-documentation-say-uiimageview-is-nscoding-compliant initWithCoder at least I thought so till recently without the developer having to bother about what goes on inside the routines unless my idea of an NSCoding compliant class are totally screwed up The UIImageView class is NSCoding compliant. So I should..
UIImageWriteToSavedPhotosAlbum save as PNG with transparency? http://stackoverflow.com/questions/1489250/uiimagewritetosavedphotosalbum-save-as-png-with-transparency NSInteger _height CGSize _size CGSizeMake _width _height UIGraphicsBeginImageContext _size Draw image with Quartz 2D routines over here... UIImage _compositeImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return _compositeImage..
http://stackoverflow.com/questions/1656476/new-to-core-data-for-iphone to get data out of Core Data and display it into your table view. Add code in your existing RSS fetching and parsing routines to store new Core Data objects back into the store when appropriate. A good way to start is just to create a new Core Data..
http://stackoverflow.com/questions/205431/rounded-corners-on-uiimage in the Contacts app. I've got code that generally work but it occasionally crashes inside of the UIImage drawing routines with an EXEC_BAD_ACCESS KERN_INVALID_ADDRESS . I thought this might be related to the cropping question I asked a few weeks..
apply style to range of text with javascript in uiwebview http://stackoverflow.com/questions/2887101/apply-style-to-range-of-text-with-javascript-in-uiwebview approach. I am not that familiar with javascript and DOM so I do not know if it is a reasonable approach. I wrote some routines to translate between text ranges and node ranges with offsets. So if I start with text range 100 200 and that starts in..
ApplicationWillTerminate in iOS 4.0 http://stackoverflow.com/questions/3139588/applicationwillterminate-in-ios-4-0 But I want to know when the applicationWillTerminate delegate method will be called where I do some DB file backup routines. void applicationWillTerminate UIApplication application I even tried to hit the minus sign and deleted the App running..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework is one final thing that needs to be done Need to see the documentation for this one... in order to optimise different routines return values that need to be scaled by different amounts in order to be correct as per the math In this case... scale float..
Find the tangent of a point on a cubic bezier curve (on an iPhone) http://stackoverflow.com/questions/4089443/find-the-tangent-of-a-point-on-a-cubic-bezier-curve-on-an-iphone In both cases use bezierTangent to find the tangents. Finally at the bottom is a code block containing only the two routines you need for the calculation and nothing else. Hope this helps someone in the future. MBBezierView.m original BY MICHAL.. 400 20 600 700 mm setNeedsDisplay self addSubview mm Finally here in the simplest possible fashion are the two routines to calculate equidistant points in fact approximately equidistant and the tangents of those along a bezier cubic CGFloat.. usually called the four control points. Of course t runs from 0 to 1 perhaps for example every 0.05. Simply call these routines once for X and separately once for Y. Hope it helps someone iphone ipad bezier share improve this question The tangent..
http://stackoverflow.com/questions/412982/iphone-unzip-code archives created by WinZip. Those can also be decompressed using zLib but you'd have to parse the header and use other routines. To check have a look at the first two bytes of the file. If it is 'PK' it's WinZip if it's 0x1F8B it's gZip. Because this..
CoreGraphics for retina display http://stackoverflow.com/questions/4707465/coregraphics-for-retina-display you have to do so yourself. To do that you need to multiply all of your coordinates and sizes that use in CoreGraphics routines by the input image's scale property which will be 2.0 on Retina devices to ensure you do all your manipulation at double..
Choose OpenGL ES 1.1 or OpenGL ES 2.0? http://stackoverflow.com/questions/4784137/choose-opengl-es-1-1-or-opengl-es-2-0 toward 1.1 so it can be more difficult to get started with the 2.0 API. However the fact that you can write your own routines for dealing with your geometry and textures and how they are displayed to the screen means that OpenGL ES 2.0 lets you do..
How do I detect a touch on a UIBezierPath and move a ball along that? http://stackoverflow.com/questions/4854035/how-do-i-detect-a-touch-on-a-uibezierpath-and-move-a-ball-along-that For the convenience of anyone reading in the future here is the summary from the linked question of the two handy routines... Finally here in the simplest possible fashion are the two routines to calculate equidistant points in fact approximately.. from the linked question of the two handy routines... Finally here in the simplest possible fashion are the two routines to calculate equidistant points in fact approximately equidistant and the tangents of those along a bezier cubic CGFloat..
iPhone smooth sketch drawing algorithm http://stackoverflow.com/questions/5076622/iphone-smooth-sketch-drawing-algorithm
http://stackoverflow.com/questions/5880597/custom-image-mask-in-ios it'll fit UIImage Resize then Crop https sites.google.com a injoit.com knowledge base for developers graphics uiimage routines scaling cropping rotating etc http www.hive05.com 2008 11 crop an image using the iphone sdk http maybelost.com 2010 11..
iPhone FFT with Accelerate framework vDSP http://stackoverflow.com/questions/6358764/iphone-fft-with-accelerate-framework-vdsp into an even odd configuration. vDSP_ctoz COMPLEX originalReal 2 A 1 nOver2 Set up the required memory for the FFT routines and check its availability. setupReal vDSP_create_fftsetup log2n FFT_RADIX2 if setupReal NULL printf nFFT_Setup failed to..
Video Encoding using AVAssetWriter - CRASHES http://stackoverflow.com/questions/8191840/video-encoding-using-avassetwriter-crashes running that loop tightly without managing an autorelease pool. If there are objects being autoreleased in any of the routines you're calling they will not be released until the autorelease pool above you drains. Since your while loop duration is..
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