techno blog

First encounters alongside CGContext tin flaming hold upwards bewildering. We are presented alongside a lot of code that looks most dissimilar Swift together with to a greater extent than than probable it's inwards a drawRect: method of a UIView. So let's consider the entry signal to drawing: override func drawRect(rect: CGRect) { if permit context = UIGraphicsGetCurrentContext() { } } To explain, during the lifetime of a drawRect: in that location is a CGContext that nosotros tin flaming gain access to past times precisely calling UIGraphicsGetCurrentContext() as demonstrated above. Once nosotros convey the context, which is the house that we're going to hold upwards drawing to, nosotros tin flaming draw. And this drawing volition appear every fourth dimension a stance of our UIView subclass type is presented on screen. Demonstrating CGContext To demonstrate this, the showtime affair we're going to practise is to fill upwards the stance together with to ...

UIBezierPath has an inbuilt initialiser that returns an oval inward a rect together with of course of teaching nosotros tin move this to line circles yesteryear passing a square. However, assume yous convey a rectangular icon together with yous desire to mask it alongside a circle. For this you'll demand the inscribed circle non an oval. The minute scenario I desire to imagine is a circumscribed circle exterior the rect for where nosotros want, for example, text to period of time around a foursquare icon inward a UITextView. In gild to address this I started to intend virtually how nosotros line around an icon square. H5N1 foursquare text period of time is elementary to orbit alongside a rect larger than that of the image. Circular together with oval wraps pose a bigger problem: But alongside a piffling assistance from the Internet inward finding the correct equations all these things tin endure achieved: extension CGFloat { func radians() -> CGFloat { allow b =...