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2014/10/15 ¤U¤È 10:13:12
iphone Programming Glossary: rect.sizehttp://stackoverflow.com/questions/1281601/custom-uisegmentedcontrol viewDidLoad Set set segControl background to transparent CGRect rect CGRectMake 0 0 1 1 UIGraphicsBeginImageContext rect.size CGContextRef context UIGraphicsGetCurrentContext CGContextSetFillColorWithColor context UIColor clearColor CGColor CGContextFillRect..
Howe to capture UIView top UIView http://stackoverflow.com/questions/14049796/howe-to-capture-uiview-top-uiview and code .. UIImage captureView hide controls if needed CGRect rect self.view bounds UIGraphicsBeginImageContext rect.size CGContextRef context UIGraphicsGetCurrentContext self.view.layer renderInContext context UIImage img UIGraphicsGetImageFromCurrentImageContext..
Blur an image of specific part (rectangular, circular)? http://stackoverflow.com/questions/14107979/blur-an-image-of-specific-part-rectangular-circular windows objectAtIndex 0 const CGFloat scale window.screen.scale UIGraphicsBeginImageContextWithOptions rect.size NO scale CGContextRef context UIGraphicsGetCurrentContext CGContextBeginPath context CGContextSaveGState context CGContextTranslateCTM..
Cropping an image in iOS using OpenCV face detection http://stackoverflow.com/questions/14756505/cropping-an-image-in-ios-using-opencv-face-detection the below Code get sub image UIImage getSubImageFrom UIImage img WithRect CGRect rect UIGraphicsBeginImageContext rect.size CGContextRef context UIGraphicsGetCurrentContext translated rectangle for drawing sub image CGRect drawRect CGRectMake rect.origin.x.. of the image context not strictly necessary as it will get clipped anyway CGContextClipToRect context CGRectMake 0 0 rect.size.width rect.size.height draw image img drawInRect drawRect grab image UIImage subImage UIGraphicsGetImageFromCurrentImageContext.. not strictly necessary as it will get clipped anyway CGContextClipToRect context CGRectMake 0 0 rect.size.width rect.size.height draw image img drawInRect drawRect grab image UIImage subImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext..
How to create an image from a UIView / UIScrollView http://stackoverflow.com/questions/2500915/how-to-create-an-image-from-a-uiview-uiscrollview a few different ones from the web UIImage imageByCropping UIScrollView imageToCrop toRect CGRect rect CGSize pageSize rect.size UIGraphicsBeginImageContext pageSize CGContextRef resizedContext UIGraphicsGetCurrentContext CGContextTranslateCTM resizedContext..
Must drawInRect: for a separate context be executed on the main thread? http://stackoverflow.com/questions/3207536/must-drawinrect-for-a-separate-context-be-executed-on-the-main-thread CGFloat width andHeight CGFloat height CGRect rect CGRectMake 0.0 0.0 width height UIGraphicsBeginImageContext rect.size self drawInRect rect crashing on this line UIImage scaledImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext..
http://stackoverflow.com/questions/3231690/inner-shadow-in-uilabel @ HelveticaNeue Bold size 40.0f CGSize fontSize text_ sizeWithFont font CGImageRef mask self createMaskWithSize rect.size shape ^ UIColor blackColor setFill CGContextFillRect UIGraphicsGetCurrentContext rect UIColor whiteColor setFill custom.. 2 fontSize.width 2 1 withFont font CGImageRef cutoutRef CGImageCreateWithMask self blackSquareOfSize rect.size .CGImage mask CGImageRelease mask UIImage cutout UIImage imageWithCGImage cutoutRef scale UIScreen mainScreen scale orientation.. scale orientation UIImageOrientationUp CGImageRelease cutoutRef CGImageRef shadedMask self createMaskWithSize rect.size shape ^ UIColor whiteColor setFill CGContextFillRect UIGraphicsGetCurrentContext rect CGContextSetShadowWithColor UIGraphicsGetCurrentContext..
App Crashing when using large images on iOS 4.0 http://stackoverflow.com/questions/3679457/app-crashing-when-using-large-images-on-ios-4-0 image CGRect rect CGRectMake 0.0 0.0 floorf actualWidth scale floorf actualHeight scale UIGraphicsBeginImageContext rect.size image drawInRect rect UIImage imageToDraw UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext imageToDraw..
http://stackoverflow.com/questions/4694023/ios-light-linen-background what I did. I grabbed the image this way CGRect rect CGRectMake 0.0f 0.0f 640.0f 960.0f UIGraphicsBeginImageContext rect.size CGContextRef context UIGraphicsGetCurrentContext CGContextSetFillColorWithColor context UIColor underPageBackgroundColor..
Drawing waveform with AVAssetReader http://stackoverflow.com/questions/5032775/drawing-waveform-with-avassetreader CGContextSetFillColorWithColor context UIColor blackColor .CGColor CGContextSetAlpha context 1.0 CGRect rect rect.size imageSize rect.origin.x 0 rect.origin.y 0 CGColorRef leftcolor UIColor whiteColor CGColor CGColorRef rightcolor UIColor.. CGContextSetFillColorWithColor context UIColor blackColor .CGColor CGContextSetAlpha context 1.0 CGRect rect rect.size imageSize rect.origin.x 0 rect.origin.y 0 CGColorRef leftcolor UIColor whiteColor CGColor CGColorRef rightcolor UIColor..
iOS - How to achieve emboss effect for the text on UILabel? http://stackoverflow.com/questions/8467141/ios-how-to-achieve-emboss-effect-for-the-text-on-uilabel UIImage invertedMaskWithMask UIImage mask CGRect rect CGPointZero mask.size UIGraphicsBeginImageContextWithOptions rect.size NO mask.scale UIColor blackColor setFill UIRectFill rect CGContextClipToMask UIGraphicsGetCurrentContext rect mask.CGImage.. UIColor textColor size CGSize size CGRect rect CGPointZero size UIImage mask self maskWithString string font font size rect.size UIImage invertedMask self invertedMaskWithMask mask UIImage image UIGraphicsBeginImageContextWithOptions rect.size NO UIScreen.. rect.size UIImage invertedMask self invertedMaskWithMask mask UIImage image UIGraphicsBeginImageContextWithOptions rect.size NO UIScreen mainScreen .scale CGContextRef gc UIGraphicsGetCurrentContext Clip to the mask that only allows drawing inside..
Draw glow around inside edge of multiple CGPaths http://stackoverflow.com/questions/8480401/draw-glow-around-inside-edge-of-multiple-cgpaths UIImage mask color UIColor color CGRect rect CGPointZero mask.size UIGraphicsBeginImageContextWithOptions rect.size NO mask.scale Fill the entire image with color. color setFill UIRectFill rect Now erase the masked part. CGContextClipToMask..
How to create a colored 1x1 UIImage on the iPhone dynamically? http://stackoverflow.com/questions/990976/how-to-create-a-colored-1x1-uiimage-on-the-iphone-dynamically for this UIImage imageWithColor UIColor color CGRect rect CGRectMake 0.0f 0.0f 1.0f 1.0f UIGraphicsBeginImageContext rect.size CGContextRef context UIGraphicsGetCurrentContext CGContextSetFillColorWithColor context color CGColor CGContextFillRect..
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