2014/10/15 下午 10:05:04

iphone Programming Glossary: cgpathelement

Drag UIView around Shape Comprised of CGMutablePaths

http://stackoverflow.com/questions/13664615/drag-uiview-around-shape-comprised-of-cgmutablepaths

template with ARC enabled. We add a category @interface UIBezierPath forEachElement void forEachElement void ^ CGPathElement const element block @end The implementation is very simple. We just pass the block as the info argument of the path applier.. of the path applier function. #import UIBezierPath forEachElement.h typedef void ^UIBezierPath_forEachElement_Block CGPathElement const element @implementation UIBezierPath forEachElement static void applyBlockToPathElement void info CGPathElement const.. CGPathElement const element @implementation UIBezierPath forEachElement static void applyBlockToPathElement void info CGPathElement const element __unsafe_unretained UIBezierPath_forEachElement_Block block __bridge UIBezierPath_forEachElement_Block info..

Getting a list of points from a UIBezierPath

http://stackoverflow.com/questions/3051760/getting-a-list-of-points-from-a-uibezierpath

and CGPathApply . The path applier function might look something like this void MyCGPathApplierFunc void info const CGPathElement element NSMutableArray bezierPoints NSMutableArray info CGPoint points element points CGPathElementType type element type.. void info const CGPathElement element NSMutableArray bezierPoints NSMutableArray info CGPoint points element points CGPathElementType type element type switch type case kCGPathElementMoveToPoint contains 1 point bezierPoints addObject NSValue valueWithCGPoint.. bezierPoints NSMutableArray info CGPoint points element points CGPathElementType type element type switch type case kCGPathElementMoveToPoint contains 1 point bezierPoints addObject NSValue valueWithCGPoint points 0 break case kCGPathElementAddLineToPoint..

Drawing Smooth Curves - Methods Needed

http://stackoverflow.com/questions/8702696/drawing-smooth-curves-methods-needed

points. Based on code from Erica Sadun #import UIBezierPath Smoothing.h void getPointsFromBezier void info const CGPathElement element NSArray pointsFromBezierPath UIBezierPath bpath #define VALUE _INDEX_ NSValue valueWithCGPoint points _INDEX_ #define.. @implementation UIBezierPath Smoothing Get points from Bezier Curve void getPointsFromBezier void info const CGPathElement element NSMutableArray bezierPoints __bridge NSMutableArray info Retrieve the path element type and its points CGPathElementType.. element NSMutableArray bezierPoints __bridge NSMutableArray info Retrieve the path element type and its points CGPathElementType type element type CGPoint points element points Add the points if they're available per type if type kCGPathElementCloseSubpath..