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2014/10/15 ¤U¤È 10:10:14

iphone Programming Glossary: incontext

iPhone development: pointer being freed was not allocated

http://stackoverflow.com/questions/1424210/iphone-development-pointer-being-freed-was-not-allocated

_display CABackingStoreUpdate backing_callback CGContext void CALayer drawInContext UIView CALayerDelegate drawLayer inContext AvatarView drawRect AvatarView overlayPNG UIImageUtility createMaskOf UIGraphicsGetImageFromCurrentImageContext CGBitmapContextCreateImage..

composite colors: CALayer and blend mode on iPhone

http://stackoverflow.com/questions/1658751/composite-colors-calayer-and-blend-mode-on-iphone

layers are only adding their colors. Here is my code @implementation WhiteLayerHelper void drawLayer CALayer theLayer inContext CGContextRef myContext draw a white overlay with special blending and alpha values so that the saturation can be animated..

Using CALayer Delegate

http://stackoverflow.com/questions/2015353/using-calayer-delegate

MyLayerDelegate NSObject . . . @end In MyView.m @implementation MyLayerDelegate void drawLayer CALayer layer inContext CGContextRef ctx . . . @end Just place those at the top of your file immediately below the #import directives. That way..

UISearchBar clear background color or set background image [iphone sdk]

http://stackoverflow.com/questions/2139115/uisearchbar-clear-background-color-or-set-background-image-iphone-sdk

image nil if image nil image UIImage imageNamed @ UISearchBarBack.png retain return image void drawLayer CALayer layer inContext CGContextRef contenxt if self isMemberOfClass UISearchBar class NO return UIImage image self.frame.size.width 320 UISearchBar..

Add text to CALayer

http://stackoverflow.com/questions/2209734/add-text-to-calayer

functions provided in NSString UIKit additions as shown below. While my code is done in the delegate's drawLayer inContext method the same can be used in subclass' drawInContext method. Is there any specific UILabel functionality that you want.. method. Is there any specific UILabel functionality that you want to leverage void drawLayer CALayer layer inContext CGContextRef ctx CGContextSetFillColorWithColor ctx UIColor darkTextColor CGColor UIGraphicsPushContext ctx word drawInRect..

CGContextDrawPDFPage taking up large amounts of memory

http://stackoverflow.com/questions/2975240/cgcontextdrawpdfpage-taking-up-large-amounts-of-memory

a background thread but the autorelease pool is setup elsewhere void drawPage CGPDFPageRef m_page inRect CGRect rect inContext CGContextRef g CGPDFBox box kCGPDFMediaBox CGAffineTransform t CGPDFPageGetDrawingTransform m_page box rect 0 YES CGRect..

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

zooming I acquire the CGPDFPage and render it using the appropriate CTM. The code in void drawLayer CALayer layer inContext CGContextRef context is like CGAffineTransform currentCTM CGContextGetCTM context if currentCTM.a 1.0 baseImage Calculate..

How to display an image on a MKOverlayView?

http://stackoverflow.com/questions/3891850/how-to-display-an-image-on-a-mkoverlayview

of the custom MKOverlayView RadarOverlayView void drawMapRect MKMapRect mapRect zoomScale MKZoomScale zoomScale inContext CGContextRef context RadarOverlay radarOverlay RadarOverlay self.overlay UIImage image UIImage alloc initWithData radarOverlay.radarData..

CGContext pdf page aspect fit

http://stackoverflow.com/questions/3908624/cgcontext-pdf-page-aspect-fit

pdf page aspect fit I am displaying a pdf page on the CGContext using the code void drawLayer CALayer layer inContext CGContextRef context CGContextSetRGBFillColor ctx 1.0 1.0 1.0 1.0 CGContextFillRect ctx layer.bounds CGContextTranslateCTM.. by comparing the results of CGPDFGetBoxRect to your content area. Typing extemporaneously void drawLayer CALayer layer inContext CGContextRef context CGContextSetRGBFillColor ctx 1.0 1.0 1.0 1.0 CGContextFillRect ctx layer.bounds CGContextTranslateCTM..

Drawing in CATiledLayer with CoreGraphics CGContextDrawImage

http://stackoverflow.com/questions/4067512/drawing-in-catiledlayer-with-coregraphics-cgcontextdrawimage

I would like to use a CATiledLayer in iPhone OS 3.1.3 and to do so all drawing in void drawLayer CALayer layer inContext CGContext context has to be done with coregraphics only. Now I run into the problems of the flipped coordinate system on.. code and replacing the drawing method with coregraphics calls only. It looks like this void drawLayer CALayer layer inContext CGContextRef context CGContextSaveGState context CGRect rect CGContextGetClipBoundingBox context CGFloat scale CGContextGetCTM.. started by following the WWDC 2010 ScrollView talk and there is little or no documentation on working within drawLayer inContext for iOS 3.x. I had the same issues as you do when I moved the demo code from drawRect across to drawLayer inContext . Hours..

how to fit pdf page in entire view

http://stackoverflow.com/questions/4321681/how-to-fit-pdf-page-in-entire-view

to fit pdf page in entire view i read pdf files and also displayed the code is like this void drawLayer CALayer layer inContext CGContextRef ctx NSLog @ the layer height d d d d layer.bounds.size.width layer.bounds.size.height layer.bounds.origin.x..

problem with rendering pdf on the entire screen of pdf

http://stackoverflow.com/questions/4634331/problem-with-rendering-pdf-on-the-entire-screen-of-pdf

questions and answers but still i didN't get exact result.my code is looking like this void drawLayer CALayer layer inContext CGContextRef ctx if UIInterfaceOrientationIsPortrait self interfaceOrientation layer.backgroundColor UIColor blackColor..

How do I create an image overlay and add to MKMapView?

http://stackoverflow.com/questions/5283741/how-do-i-create-an-image-overlay-and-add-to-mkmapview

MapOverlayView.m @implementation MapOverlayView void drawMapRect MKMapRect mapRect zoomScale MKZoomScale zoomScale inContext CGContextRef ctx UIImage image UIImage imageNamed @ image.png retain CGImageRef imageReference image.CGImage MKMapRect theMapRect..

Draw text in circle overlay

http://stackoverflow.com/questions/7825220/draw-text-in-circle-overlay

tried the first response's solution same result . void drawMapRect MKMapRect mapRect zoomScale MKZoomScale zoomScale inContext CGContextRef context super drawMapRect mapRect zoomScale zoomScale inContext context NSString t @ XXXXX nXXXX UIGraphicsPushContext.. mapRect zoomScale MKZoomScale zoomScale inContext CGContextRef context super drawMapRect mapRect zoomScale zoomScale inContext context NSString t @ XXXXX nXXXX UIGraphicsPushContext context CGContextSaveGState context UIColor redColor set CGRect overallCGRect..

Creating a custom text-drawing view

http://stackoverflow.com/questions/844829/creating-a-custom-text-drawing-view

about using multiple CALayers one after another but I am having trouble drawing content to the layers using drawLayer inContext and drawInContext . So my questions are Does anyone have any even general suggestions about how to accomplish either of..