Creating UIViews Programmatically in Swift

With view constraints, using PureLayout

Photo by Hal Gatewood on Unsplash

What to expect

• Understanding an iOS screen
• View Hierarchy
• When to build views programmatically
• How to organize your code (MVC Pattern)
• Building custom classes (UIView)
• An example — the Twitter iOS app
• !Massive View Controllers
• Setting our constraints (PureLayout)

Understanding an iOS screen

Any iOS app has a many views. Those views needs four values specified in order to be displayed: x, y, width, height.

There are three different ways of building these views: Storyboards, Nib files and Programmatically.

There is a framework in the iOS sdk (UIKit) that includes a set of standard subclasses that range from simple buttons to complex tables among a lot of other view objects. For example, a UILabel object draws a text string and a UIImageView object draws an image.