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2014/10/15 ¤U¤È 10:15:05
iphone Programming Glossary: translateDrawing rotated text with NSString drawInRect http://stackoverflow.com/questions/10289898/drawing-rotated-text-with-nsstring-drawinrect to move the context back into the view. In the example below I rotate the context counterclockwise 90 degrees. Then I translate the tx of the context the distance of the height. void drawRect CGRect rect CGContextRef context UIGraphicsGetCurrentContext..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage expect. For a completely black transparent area of the image I get non zero values for the alpha channel. Do I need to translate the co ordinates between UIKit and Core Graphics i.e is the y axis inverted Or have I misunderstood premultiplied alpha.. misunderstood premultiplied alpha values Update @Nikolai Ruhe's suggestion was key to this. I did not in fact need to translate between UIKit coordinates and Core Graphics coordinates. However after setting the blend mode my alpha values were what..
iPhone board game: OpenGL ES or CoreGraphics? [closed] http://stackoverflow.com/questions/1082511/iphone-board-game-opengl-es-or-coregraphics
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone NSUTF8StringEncoding UTF8String pool drain return 0 Given this code and the fact that encrypted data will not always translate nicely into an NSString it may be more convenient to write two methods that wrap the functionality you need in forward and..
Encrypted NSData to NSString in obj-c? http://stackoverflow.com/questions/1417893/encrypted-nsdata-to-nsstring-in-obj-c methods to convert between NSData and NSString. Even with these note that AES encrypted data will probably not translate well into strings as is some byte sequences just won't play nicely so it's a good idea to encode the data before creating..
How do I translate parabolically? http://stackoverflow.com/questions/1886158/how-do-i-translate-parabolically do I translate parabolically I'm working on an iPhone app with some simple animation. I have a view I want to translate but not along.. do I translate parabolically I'm working on an iPhone app with some simple animation. I have a view I want to translate but not along a line. I want to translate it parabolically. Imagine that I am animating a car moving along a curved road... working on an iPhone app with some simple animation. I have a view I want to translate but not along a line. I want to translate it parabolically. Imagine that I am animating a car moving along a curved road. I know I can set the transform properly..
Installing a configuration profile on iPhone - programmatically http://stackoverflow.com/questions/2338035/installing-a-configuration-profile-on-iphone-programmatically but that did not convince. Same behavior for mailto URLs within UIWebView. For mailto URLs the common technique is to translate them into openURL calls but that doesn't quite work for my case see scenario A. For itms URLs however UIWebView works as..
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 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 one paragraph..
finding location of specific characters in UILabel on iPhone http://stackoverflow.com/questions/3191049/finding-location-of-specific-characters-in-uilabel-on-iphone this UILabel. Logical first step is find the position of those characters in the string UILabel.text but then how do I translate that into coordinates when it's actually drawn on screen The idea is to find those coordinates and draw something custom..
How to get UILabel (UITextView) auto adjusted font size? http://stackoverflow.com/questions/3669844/how-to-get-uilabel-uitextview-auto-adjusted-font-size 2 CGFloat locations 2 0.0 1.0 CGFloat components 8 1 1 1 0.25 BOTTOM color 1 1 1 0.12 UPPER color scale and translate so that text would not be rotated 180 deg wrong CGContextTranslateCTM myContext 0 rect.size.height CGContextScaleCTM myContext..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file a .xib file with a view and sized the view to 850 x 1100 my PDF was targeting 8.5 x 11 inches so this makes it easy to translate to from design time coordinates . In code I load the view UIView loadTemplate NSArray nib NSBundle mainBundle loadNibNamed..
Slight zoom on MKCoordinateRegion? http://stackoverflow.com/questions/4724176/slight-zoom-on-mkcoordinateregion upper.longitude lower.longitude 0.9 However I have noticed that fine adjustments don't seem to translate to a small zoom increase is there some form of snapping on the zoom Really small values work as do really big ones but just..
Creating a JSON Store For iPhone http://stackoverflow.com/questions/5237943/creating-a-json-store-for-iphone Store For iPhone We have loads of apps where we fetch data from remote web services as JSON and then use a parser to translate that into a Core Data model. For one of our apps I'm thinking we should do something different. This app has read only data..
http://stackoverflow.com/questions/8482327/learning-opengles-2-0-on-ios resources you can refer to. While written for desktop OpenGL most of the shading language and shaders presented there translate directly across to OpenGL ES 2.0 with only a little modification required. The books ShaderX6 ShaderX7 GPU Pro and GPU Pro..
UIImage Rotation custom degrees http://stackoverflow.com/questions/917713/uiimage-rotation-custom-degrees UIImage image UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return image You might need to also translate the CTM in addition to rotating to compensate for the center of rotation. If you want to not crop the edges of the image..
Rotate CGPath without changing its position http://stackoverflow.com/questions/13738364/rotate-cgpath-without-changing-its-position instead of around the origin. The trick is to create a composite transform that combines three individual transforms Translate the origin to the rotation point. Rotate. Invert the translation from step 1. For example here's a function that takes a.. bounds CGRectGetMidY bounds CGAffineTransform transform CGAffineTransformIdentity transform CGAffineTransformTranslate transform center.x center.y transform CGAffineTransformRotate transform radians transform CGAffineTransformTranslate transform.. transform center.x center.y transform CGAffineTransformRotate transform radians transform CGAffineTransformTranslate transform center.x center.y return CGPathCreateCopyByTransformingPath path transform Note that this function returns a new..
Convert GPS coordinates to coordinate plane http://stackoverflow.com/questions/3588653/convert-gps-coordinates-to-coordinate-plane GPS coordinates to coordinate plane This is somewhat related to another question I asked Translate GPS coordinates to location on PDF Map . That got me to this point now I'm stuck on the math. Let's say I have a floor plan..
UIImage with transparent rounded corners http://stackoverflow.com/questions/4885713/uiimage-with-transparent-rounded-corners state so that the translate and scale can be undone with a call to CGContextRestoreGState. CGContextSaveGState context Translate the origin of the contex to the lower left corner of the rectangle. CGContextTranslateCTM context CGRectGetMinX rect CGRectGetMinY.. CGContextSaveGState context Translate the origin of the contex to the lower left corner of the rectangle. CGContextTranslateCTM context CGRectGetMinX rect CGRectGetMinY rect Normalize the scale of the context so that the width and height of the..
Custom transition between two UIViews http://stackoverflow.com/questions/5511514/custom-transition-between-two-uiviews Pre transform our view s target current d target current CGAffineTransform transform CGAffineTransformIdentity Translate our view CGPoint center CGPointMake screenOrigin.x image.size.width 2.0 screenOrigin.y image.size.height 2.0 float dX center.x.. dX center.x self.view.center.x float dY center.y self.view.center.y NSLog @ dx f dy f dX dY transform CGAffineTransformTranslate transform dX dY Scale our view float scaleWFactor image.size.width self.view.frame.size.width float scaleHFactor image.size.height..
Language Translation API for iPhone http://stackoverflow.com/questions/9732633/language-translation-api-for-iphone Mygengo Translation API http mygengo.com api Microsoft Translator APIs http www.microsofttranslator.com dev Speaklite Translate API http www.speaklike.com access professional translation via api WebServiceX Translate API http www.webservicex.net ws.. dev Speaklite Translate API http www.speaklike.com access professional translation via api WebServiceX Translate API http www.webservicex.net ws wsdetails.aspx wsid 63 This is also helpful http alwawee.com wordpress 2011 07 03 objective..
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