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2014/10/15 ¤U¤È 10:05:04
iphone Programming Glossary: cgpathreleaseHow can I animate the movement of a view or image along a curved path? http://stackoverflow.com/questions/1142727/how-can-i-animate-the-movement-of-a-view-or-image-along-a-curved-path curvedPath NULL endPoint.x viewOrigin.y endPoint.x viewOrigin.y endPoint.x endPoint.y pathAnimation.path curvedPath CGPathRelease curvedPath CAAnimationGroup group CAAnimationGroup animation group.fillMode kCAFillModeForwards group.removedOnCompletion..
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
Drag UIView around Shape Comprised of CGMutablePaths http://stackoverflow.com/questions/13664615/drag-uiview-around-shape-comprised-of-cgmutablepaths path_.CGPath NULL 0 CGFloat 1.0f 1.0f 2 UIBezierPath dashedPath UIBezierPath bezierPathWithCGPath cgDashedPath CGPathRelease cgDashedPath It turns out that when Core Graphics dashes the path it can create segments that slightly overlap. We'll want..
Rotate CGPath without changing its position http://stackoverflow.com/questions/13738364/rotate-cgpath-without-changing-its-position
How do I translate parabolically? http://stackoverflow.com/questions/1886158/how-do-i-translate-parabolically curvedPath NULL endPoint.x viewOrigin.y endPoint.x viewOrigin.y endPoint.x endPoint.y pathAnimation.path curvedPath CGPathRelease curvedPath This creates a curve with two control points one at the origin of the view and the other at the upper right corner..
http://stackoverflow.com/questions/2570653/iphone-clip-image-with-path
iPhone - How to make a circle path for a CAKeyframeAnimation? http://stackoverflow.com/questions/3804453/iphone-how-to-make-a-circle-path-for-a-cakeyframeanimation is half the values you specify here CGPathAddEllipseInRect circularPath NULL pathRect spinAnimation.path circularPath CGPathRelease circularPath You will notice the keypath of the animation is the center property of the UIView you wish to make fly around..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer aColor setFill CGContextSaveGState context CGContextAddPath context path CGContextEOFillPath context Release the paths CGPathRelease path CGPathRelease visiblePath So essentially there are the following steps Create your path Set the fill color you want.. context CGContextAddPath context path CGContextEOFillPath context Release the paths CGPathRelease path CGPathRelease visiblePath So essentially there are the following steps Create your path Set the fill color you want add this path to the..
Why is UIBezierPath faster than Core Graphics path? http://stackoverflow.com/questions/6327817/why-is-uibezierpath-faster-than-core-graphics-path CGContextAddPath ctx cgpath Stroke each path. self strokeContext ctx self strokeUIBezierPath uipath uipath release CGPathRelease cgpath void strokeContext CGContextRef context CGContextStrokePath context void strokeUIBezierPath UIBezierPath path path.. ctx uipath.flatness self strokeContext ctx CGContextRestoreGState ctx self strokeUIBezierPath uipath uipath release CGPathRelease cgpath void strokeContext CGContextRef context CGContextStrokePath context void strokeUIBezierPath UIBezierPath path path..
How to know the current position of circle while it is rotating on custom route path? http://stackoverflow.com/questions/8192018/how-to-know-the-current-position-of-circle-while-it-is-rotating-on-custom-route int p2 animatebtn.frame.origin.y CGPathAddLineToPoint curvedPath NULL p1 p2 pathAnimation.path curvedPath CGPathRelease curvedPath UIGraphicsBeginImageContext CGSizeMake 20 20 CGContextRef ctx UIGraphicsGetCurrentContext Set context variables..
Memory usage grows with CTFontCreateWithName and CTFramesetterRef http://stackoverflow.com/questions/8491841/memory-usage-grows-with-ctfontcreatewithname-and-ctframesetterref 5 CFRelease frameSetter retain count of the font 4 CTFrameDraw frame ctx CFRelease frame retain count of the font 2 CGPathRelease path Is there some sort of cache I really need to flush the memory used by this font immediately. P.S I used CFGetRetainCount..
http://stackoverflow.com/questions/862084/move-a-uiimageview pointPath NULL point2.x point2.y CGPathAddLineToPoint pointPath NULL point3.x point3.y pathAnimation.path pointPath CGPathRelease pointPath imageView.layer addAnimation pathAnimation forKey @ pathAnimation Note that by default the position of a layer..
iPhone, Map, Clickable non-rectangular areas http://stackoverflow.com/questions/870631/iphone-map-clickable-non-rectangular-areas if CGPathContainsPoint path null touchPoint false ... And don't forget to release when you're done with the regions CGPathRelease path Note that you can create several separate subpaths in one CGPathRef and it will check all the subpaths when you check..
Moving an image along a series of CGPoints http://stackoverflow.com/questions/9245954/moving-an-image-along-a-series-of-cgpoints CAKeyframeAnimation animationWithKeyPath @ position add our path to it pathAnimation.path path be nice to the system CGPathRelease path setup some more animation parameters pathAnimation.duration 0.1 self.array.count add the animation to our imageView's..
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