uibezierpath

问题 I have lines in many directions and angles, I draw them using UIBezierpath . I need to draw an arrow on one of the ends of the line; dynamically depending on given point. Edit: Edit 2: with Jake answer here is my code let y2 = line.point2Y let path = UIBezierPath() path.move(to: CGPoint(x: x1, y: y1)) path.addLine(to: CGPoint(x: x2, y: y2)) path.addArrow(start: CGPoint(x: x1, y: y1), end: CGPoint(x: x2, y: y2), pointerLineLength: ... path.close() let shape = CAShapeLayer() let shapeBorder =

问题 I'm trying to understand different drawing methods in Swift and why they perform as they do. The below code draws smooth lines using a UIBezierPath , project available from https://github.com/limhowe/LimSignatureView Initially the performance of the code below is highly responsive when the user begins touching the screen. However, over time, the longer the duration of touching and moving on the screen, the performance begins to lag and the drawing displayed doesn't keep up and isn't accurate

问题 I'm trying to understand different drawing methods in Swift and why they perform as they do. The below code draws smooth lines using a UIBezierPath , project available from https://github.com/limhowe/LimSignatureView Initially the performance of the code below is highly responsive when the user begins touching the screen. However, over time, the longer the duration of touching and moving on the screen, the performance begins to lag and the drawing displayed doesn't keep up and isn't accurate

问题 I have two points left and right by adding some static value to Y and X is AVG of both left and right I have create 3rd point centre After that I draw curve using bezier path between them And all works fine. In above curve Now I want to create two more points (5 Points curve). One Between centre and left and one between centre and right . I tried to take again Average and draw 5 Point curve using func drawFivePoint(_ startPoint: CGPoint?, leftCenterPoint: CGPoint?, toControlPoint controlPoint

问题 In my application I have a requirement in such a way that I need to fill circle with red color with percentage values like 50%, 80% which I am getting from API like below image. Currently I am using the below code to achieve this. let roundView = UIView(frame:CGRect(x: 100, y: 100, width: 250, height: 250)) roundView.backgroundColor = UIColor.white roundView.layer.cornerRadius = roundView.frame.size.width / 2 // bezier path let circlePath = UIBezierPath(arcCenter: CGPoint (x: roundView.frame

问题 I am working with multitouch while writing, So basically what I am doing is, I am writing with hand support, because typically, its how user writes, I followed this link How to ignore certain UITouch Points in multitouch sequence Everything is working fine with single touch, but their is some problem when I write with my hand touching the screen i.e multiple UItouches Below is my code In touches began, I go through all touches and I find the touch with highest y position, below is my code

问题 I am drawing a hexagon with 3 different colors. I gave a color for each line. Here is my code; - (void)drawRect:(CGRect)rect { self.colors = [[NSMutableArray alloc] initWithObjects:[UIColor yellowColor],[UIColor yellowColor],[UIColor blueColor],[UIColor blueColor],[UIColor greenColor],[UIColor greenColor], nil]; [self addPointsToArray]; CGPoint startPoint = [[self.points objectAtIndex:self.pointCounter] CGPointValue]; CGPoint endPoint = [[self.points objectAtIndex:self.pointCounter+1]

问题 I am working with Bezier path and making simple shapes with it. What is the process for making a star shape using Bezier paths? 回答1: Try this path: //// Star Drawing UIBezierPath* starPath = [UIBezierPath bezierPath]; [starPath moveToPoint: CGPointMake(45.25, 0)]; [starPath addLineToPoint: CGPointMake(61.13, 23)]; [starPath addLineToPoint: CGPointMake(88.29, 30.75)]; [starPath addLineToPoint: CGPointMake(70.95, 52.71)]; [starPath addLineToPoint: CGPointMake(71.85, 80.5)]; [starPath

问题 I'm drawing my graph view using UIBezierPath methods and coretext. I use addQuadCurveToPoint:controlPoint: method to draw curves on graph. I also use CATiledLayer for the purpose of rendering graph with large data set on x axis. I draw my whole graph in an image context and in drawrect: method of my view I draw this image in my whole view. Following is my code. - (void)drawImage{ UIGraphicsBeginImageContextWithOptions(self.frame.size, NO, 0.0); // Draw Curves [self drawDiagonal]; UIImage

问题 I'm drawing my graph view using UIBezierPath methods and coretext. I use addQuadCurveToPoint:controlPoint: method to draw curves on graph. I also use CATiledLayer for the purpose of rendering graph with large data set on x axis. I draw my whole graph in an image context and in drawrect: method of my view I draw this image in my whole view. Following is my code. - (void)drawImage{ UIGraphicsBeginImageContextWithOptions(self.frame.size, NO, 0.0); // Draw Curves [self drawDiagonal]; UIImage