uibezierpath

How can I create objects along a path/BezierCurve? In other words, how can I create several UIButtons along a given path, with a given interval along that same path? I have seen dozens of questions about moving objects. But I need a solution to actually create them. I would like to go along the path and create an object for every X points/distance. Like this: ....@....@....@....@.... In this case, for every 4 points, get the position, and create a UIButton there. iOS doesn't have a public API that directly gives you points spaced along a path. But there is a roundabout way to do it. Suppose

1.Quartz 2D(Core Graphics) 苹果公司使用C语言编写的一套绘图引擎(一组能够实现绘图API),即可以在iOS中使用,也可以在Mac OS X上使用 step1:自定义一个类,继承自UIView step2:重写 类中的 drawRect 方法 - ( void )drawRect:( CGRect )rect { //获取已经存在的绘图上下文对象 //系统最终会将绘图上下文中记录的数据编程图像 //为了影响最终绘制出来的结果,所以,就需要修改 //唯一的绘图上下文对象中记录的数据 CGContextRef context = UIGraphicsGetCurrentContext(); CGContextMoveToPoint(context, 40 , 40 ); CGContextAddLineToPoint(context, 40 , 140 ); CGContextAddLineToPoint(context, 140 , 40 ); CGContextAddLineToPoint(context, 40 , 40 ); //设置描边的颜色 CGContextSetStrokeColorWithColor(context,[[ UIColor redColor] CGColor]); CGContextSetFillColorWithColor

As was suggested to me in a prior StackOverflow question, I'm trying to improve my drawing method for letting my user draw lines/dots into a UIView. I'm now trying to draw using a CAShapeLayer instead of dispatch_async. This all works correctly, however, drawing into the CAShapeLayer continuously while touches are moving becomes slow and the path lags behind, whereas my old (inefficient I was told) code worked beautifully smooth and fast. You can see my old code commented out below. Is there any way to improve the performance for what I want to do? Maybe I'm overthinking something. I'd

I'm trying to animation the transition of a CALayer from normal corners to rounded corners. I only want to round the top corners, so I am using a UIBezierPath. Here's the code: UIRectCorner corners = UIRectCornerTopLeft | UIRectCornerTopRight; UIBezierPath* newPath = [UIBezierPath bezierPathWithRoundedRect:self.bounds byRoundingCorners:corners cornerRadii:CGSizeMake(8.0f, 8.0f)]; UIBezierPath* oldPath = [UIBezierPath bezierPathWithRoundedRect:self.bounds byRoundingCorners:corners cornerRadii:CGSizeMake(0.0f, 0.0f)]; CAShapeLayer* layer = [CAShapeLayer layer]; layer.frame = self.bounds; layer

I need to make a curve in a UIView as displayed in the image below. I have to use UIBezierPath . Kindly help me out with this. I also want to know how to flip the curve from the horizontal axis, so that I have the arc at the top and the base at the bottom. To draw a solid filled in arc within a particular CGSize , you can define a UIBezierPath like so: - (UIBezierPath * _Nullable)pathOfArcWithinSize:(CGSize)size { if (size.width == 0 || size.height <= 0) return nil; CGFloat theta = M_PI - atan2(size.width / 2.0, size.height) * 2.0; CGFloat radius = self.bounds.size.height / (1.0 - cos(theta));

Problem: I have a user generated polygon (via registering user's touches on screen) which can be simple or complex (complex means having unknown number of intersections) and I want to have a simple polygon resulting from the same points on the original polygon, something like an outline or a contour if you will. Possible solutions: I have found this , but it is a JavaScript solution and this is a perfect illustration of what I need but in ActionScript! I don't need the Path itself, the points will suffice. How would you approach such problem? Update: As I was looking further around, I have

I am using UIBezierPath to have my imageview have round corners but I also want to add a border to the imageview. Keep in mind the top is a uiimage and the bottom is a label. Currently using this code produces: let rectShape = CAShapeLayer() rectShape.bounds = myCell2.NewFeedImageView.frame rectShape.position = myCell2.NewFeedImageView.center rectShape.path = UIBezierPath(roundedRect: myCell2.NewFeedImageView.bounds, byRoundingCorners: .TopRight | .TopLeft, cornerRadii: CGSize(width: 25, height: 25)).CGPath myCell2.NewFeedImageView.layer.mask = rectShape I want to add a green border to that