How to invert text color in TextField depending on background

Question

I have thumbnail image with TextField on it which shows the video length. How could I make it different from various background (thumbnail) colors?

Answer 1

You can add shadow for your label to prevent situation on screenshot:

label.layer.shadowOpacity = 1
label.layer.shadowRadius = 0
label.layer.shadowColor = UIColor.black.cgColor
label.layer.shadowOffset = CGSize(width: 0, height: -1)

Answer 2

I decided to do all this stuff in Storyboard and finally, my solution is:

• set background color to LightGray with Opacity 50% in Attributes inspector-View-Background-Other
• mark "Clip to Bounds" below
• add this two lines in Identity inspector-User Defined Runtime Attributes :

And the result is: