2014/10/15 下午 10:05:00

iphone Programming Glossary: cgcontextaddpath

http://stackoverflow.com/questions/1021801/cgpathref-intersection

path draw the other path then search for pixels that survived the clipping process initialise and erase context CGContextAddPath context path1 CGContextClip context set fill colour to intersection colour CGContextAddPath context path2 CGContextFillPath.. and erase context CGContextAddPath context path1 CGContextClip context set fill colour to intersection colour CGContextAddPath context path2 CGContextFillPath context search for pixels that match intersection colour This works because clipping intersecting...

How to create a UIImage from the current graphics context?

http://stackoverflow.com/questions/1112947/how-to-create-a-uiimage-from-the-current-graphics-context

c 1.5f for CFIndex i 0 i CFArrayGetCount _pathArray i CGPathRef path CFArrayGetValueAtIndex _pathArray i CGContextAddPath c path CGContextStrokePath c CGContextRestoreGState c ... where _pathArray is of type CFArrayRef and is populated every..

How to erase finger paint on Custom UIView in iPhone

http://stackoverflow.com/questions/11132546/how-to-erase-finger-paint-on-custom-uiview-in-iphone

CGPathMoveToPoint path NULL previousPoint.x previousPoint.y CGPathAddLineToPoint path NULL lastPoint.x lastPoint.y CGContextAddPath context path CGContextSetLineWidth context 5 UIColor blueColor setStroke CGContextDrawPath context kCGPathFillStroke IBAction..

How can I check if a user tapped near a CGPath?

http://stackoverflow.com/questions/1143704/how-can-i-check-if-a-user-tapped-near-a-cgpath

what I had working UIGraphincsBeginImageContext CGPathGetBoundingBox path CGContextRef g UIGraphicsGetCurrentContext CGContextAddPath g path CGContextSetLineWidth g 15 CGContextReplacePathWithStrokedPath g CGPath clickArea CGContextCopyPath g Not documented..

How to erase some portion of a UIImageView's image on iOS?

http://stackoverflow.com/questions/1487601/how-to-erase-some-portion-of-a-uiimageviews-image-on-ios

UIImage img imgView.image CGSize s img.size UIGraphicsBeginImageContext s CGContextRef g UIGraphicsGetCurrentContext CGContextAddPath g erasePath CGContextAddRect g CGRectMake 0 0 s.width s.height CGContextEOClip g img drawAtPoint CGPointZero imageView.image..

Break on EXC_BAD_ACCESS in XCode?

http://stackoverflow.com/questions/1622079/break-on-exc-bad-access-in-xcode

TestProject 1289 CGContextSetLineWidth invalid context Sun Oct 25 15 12 14 jasonsmacbook TestProject 1289 CGContextAddPath invalid context Sun Oct 25 15 12 14 jasonsmacbook TestProject 1289 CGContextDrawPath invalid context 2009 10 25 15 12 14.680..

Animating a shape with CoreAnimation

http://stackoverflow.com/questions/1767401/animating-a-shape-with-coreanimation

path NULL 10.0f 300.0f CGPathCloseSubpath path CGContextSetFillColorWithColor ctx UIColor blueColor .CGColor CGContextAddPath ctx path CGContextFillPath ctx Drawing a line from control points 1 and 2 CGContextBeginPath ctx CGContextSetRGBStrokeColor.. CGPathMoveToPoint cp1 NULL cp1x cp1y CGPathAddLineToPoint cp1 NULL cp2x cp2y CGPathCloseSubpath cp1 CGContextAddPath ctx cp1 CGContextStrokePath ctx void adjustWave UIView beginAnimations @ movement context nil UIView setAnimationDelegate..

How to erase piece of UIImageView with png-brush and UIBezierPath

http://stackoverflow.com/questions/17674311/how-to-erase-piece-of-uiimageview-with-png-brush-and-uibezierpath

of UIBezierPath and example but author just draws lines by path CGContextRef context UIGraphicsGetCurrentContext CGContextAddPath context path CGContextSetLineCap context kCGLineCapRound CGContextSetLineWidth context self.lineWidth CGContextSetStrokeColorWithColor..

Drawing incrementally in a UIView (iPhone)

http://stackoverflow.com/questions/1798414/drawing-incrementally-in-a-uiview-iphone

dotsPath NULL CGRectMake drop.point.x drop.dropSize 2 drop.point.y drop.dropSize 2 drop.dropSize drop.dropSize CGContextAddPath context dotsPath CGContextSetRGBFillColor context 0.5 0.0 0.0 1.0 CGContextFillPath context Thanks everyone iphone objective..

Rounded Corners on UIImage

http://stackoverflow.com/questions/205431/rounded-corners-on-uiimage

CGRectGetMaxY interiorRect radius PNDegreeToRadian 90.0 PNDegreeToRadian 180.0 NO CGContextBeginPath maskedContextRef CGContextAddPath maskedContextRef borderPath CGContextClosePath maskedContextRef CGContextClip maskedContextRef self drawInRect dstRect maskedImage..

CGGradient in an CGPath

http://stackoverflow.com/questions/2563303/cggradient-in-an-cgpath

cocoa touch core graphics share improve this question I think something like this will work CGContextSaveGState c CGContextAddPath c path CGContextClip c make a gradient CGColorRef colors topColor bottomColor CFArrayRef colorsArr CFArrayCreate NULL const..

iPhone clip image with path

http://stackoverflow.com/questions/2570653/iphone-clip-image-with-path

or for e.g. CGPathAddRect path NULL CGRectInset self bounds 10 20 CGPathAddEllipseInRect path NULL self bounds CGContextAddPath context path CGContextClip context CGPathRelease path UIImage imageNamed @ GC.png drawInRect self bounds share improve..

Inner shadow effect on UIView layer?

http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer

bounds.origin.y radius CGPathCloseSubpath visiblePath Fill this path UIColor aColor UIColor redColor aColor setFill CGContextAddPath context visiblePath CGContextFillPath context Now create a larger rectangle which we're going to subtract the visible path.. CGPathAddPath path NULL visiblePath CGPathCloseSubpath path Add the visible paths as the clipping path to the context CGContextAddPath context visiblePath CGContextClip context Now setup the shadow properties on the context aColor UIColor colorWithRed 0.0f.. 1.0f 3.0f aColor CGColor Now fill the rectangle so the shadow gets drawn aColor setFill CGContextSaveGState context CGContextAddPath context path CGContextEOFillPath context Release the paths CGPathRelease path CGPathRelease visiblePath So essentially there..

Why is UIBezierPath faster than Core Graphics path?

http://stackoverflow.com/questions/6327817/why-is-uibezierpath-faster-than-core-graphics-path

controlPoint1 CGPointMake x1 uiBaseline 50 controlPoint2 CGPointMake x2 uiBaseline 50 UIColor blackColor setStroke CGContextAddPath ctx cgpath Stroke each path. self strokeContext ctx self strokeUIBezierPath uipath uipath release CGPathRelease cgpath void.. controlPoint1 CGPointMake x1 uiBaseline 50 controlPoint2 CGPointMake x2 uiBaseline 50 UIColor blackColor setStroke CGContextAddPath ctx cgpath Stroke each path CGContextSaveGState ctx configure context the same as uipath CGContextSetLineWidth ctx uipath.lineWidth..

Draw glow around inside edge of multiple CGPaths

http://stackoverflow.com/questions/8480401/draw-glow-around-inside-edge-of-multiple-cgpaths

gc UIColor whiteColor .CGColor Fill each path into the mask. for UIBezierPath path in paths CGContextBeginPath gc CGContextAddPath gc path.CGPath CGContextFillPath gc Turn the bitmap context into a UIImage. CGImageRef cgImage CGBitmapContextCreateImage..