#drawrect

python을 공부할 겸 algospot에 있는 문제들을 해결해 보기로 하였습니다. 올라온 다른 답안들에 비해 아직 부족한 부분이 있지만 점차 나아질 것으로 믿고 지속적으로 해결해보려 합니다. 문제 : https://algospot.com/judge/problem/read/DRAWRECT

해결:

drawRect depends on Views -> On Startup Custom View uses wrong frames

My view hierachy looks like this: (I use Autolayout)

ContentView

CustomView (implements drawRect)

Button

TableView

In the drawRect of the CustomView I draw a UIBezierPath from the top to the bottom through all CustomView.SuperView.subViews where the line stops if a Frame is in the way and begins to draw further till the next frame and so on.

On Startup when the DrawRect is called the Viewsare…

CGContextSaveGState(ctx);

CGContextBeginPath(ctx);

CGContextMoveToPoint(ctx, center.x, center.y);

CGContextAddArc(ctx, center.x, center.y, radius, startAngle, (startAngle + angle), NO);

CGContextClosePath(ctx);

CGContextClip(ctx);

UIColor *color = self.colorList[i];

NSArray *colors = @[ (id)self.baseColor.CGColor, (id)color.CGColor ];

CGFloat locations[2] = { 0.f, 1.f };

CGGradientRef arcGradient = CGGradientCreateWithColors(colorSpace, (CFArrayRef)colors, locations);

CGContextDrawRadialGradient(ctx, arcGradient, center, 0, center, radius, 0);

CGContextRestoreGState(ctx);