iOS - Smooth Color Change Transition/Animation

Question

I want to have a smooth color transition that goes across the entire spectrum (i.e. red, blue, green, yellow, orange, etc.)

Also want to be able to have smooth transitio

Answer 1

One very simple way to accomplish this would be to use a UIView animation block.

[UIView animateWithDuration:1.0 animations:^{
    view.backgroundColor = [UIColor redColor];
}];

This will interpolate between whatever view's previous background color was, and red over the course of 1 second.

Swift:

UIView.animate(withDuration: 1.0) { 
    view.backgroundColor = .red
}