Swift version: 5.1
UIView subclass has a
transform property that lets you manipulate its size, position and rotation using something called an affine transform. This property is animatable, which means you can make a view smoothly double in size, or make it spin around, just by changing one value.
Here are some examples to get you started:
imageView.transform = CGAffineTransform(scaleX: 2, y: 2) imageView.transform = CGAffineTransform(translationX: -256, y: -256) imageView.transform = CGAffineTransform(rotationAngle: CGFloat.pi) imageView.transform = CGAffineTransform.identity
The first one makes an image view double in size, the second one makes it move up and left 256 points, the third one makes it spin around 180 degrees (the values are expressed in radians), and the fourth one sets the image view's transform back to "identity" – this means "reset."
SAVE 20% ON iOS CONF SG The largest iOS conference in Southeast Asia is back in Singapore for the 5th time in January 2020, now with two days of workshops plus two days of talks on SwiftUI, Combine, GraphQL, and more! Save a massive 20% on your tickets by clicking on this link.
Available from iOS 2.0 – see Hacking with Swift tutorial 15
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.