UIImageView .scaleAspectFit and autolayout not working programmatically from Swift

Question

I have several partly transparent PNG overlays to display overlaying one another in a view. The number of overlays varies depending on runtime conditions. I want to create the <

Answer 1

In your console log, these two lines tell you what's happening:

(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)

.

NSAutoresizingMaskLayoutConstraint:0x17009cc50 h=--& v=--& UIImageView:0x101432d20.midY == 877.5 (active)

Adding this line to your code will fix things:

swiftImageView.translatesAutoresizingMaskIntoConstraints = false