CGRect has a very convenient built-in constant: CGRect.null let aRect = ... //get rect from somewhere CGRect.null.union(aRect) //is aRect CGRect.null.intersection(aRect) //is CGRect.null CGPath doesn't have anything like this, meaning you can't do something like: let bunchOfPaths = [...] //array of…
Suppose I want to make a drawing that looks like this (pardon my bad drawing): As you can see here, I want to make a line that has multiple colors on the line. What I did now is make a…
I'm trying to apply this mask to the original image Notice there are some grey areas, I want to keep everything except PURE black. I've found this code func maskImage(image: UIImage, mask: UIImage) -> UIImage { let imageReference = (image.cgImage)!…
I'm trying to implement an animation similar to what you can see on the image: I'm using the Core Graphics and Core Animation with UIBezierPath to achieve this, but the problem seems to be with the start and the end…
I need to draw a rounded rect. However, at very special corner radius values (between 34 to 37), it causes very strange bugs like the image below. Can someone explain to me why it happened? class ViewController: UIViewController { override…
Using CoreGraphics to render text with attributes as as an image and return that image - the code that returns the image is: func textualImage(text: String, textSize: CGFloat, textColor: UIColor, backgroundColor: UIColor = .white) -> UIImage? { let paragraphStyle =…
I'm trying to draw rectangles pattern using DrawRect like this: Currently, I'm doing this like so: class PatternView: UIView { override func draw(_ rect: CGRect) { let context = UIGraphicsGetCurrentContext() let numberOfBoxesPerRow = 7 let boxSide: CGFloat = rect.width /…
I'm trying to apply an angle gradient to the dashes created with the code I've written inside a custom UIView class, as below. Although it needs tweaking, I'm happy with the results it produces so far. Given the input parameters…