UIButton - font will not update

PSA: UIButton and interface builder - use default style to update fonts

TL;DR: Update the button style to Default instead of Plain

Problem

• If you add a UIButton via interface builder, then try to use button.apply(style: .secondary) , you may notice the font doesn’t update sometimes.
• The font looks like it is applied when you check with the debugger and type po button.titleLabel?.font
• But.. don’t be fooled. It is not applied at all.

Fix

• Update the button style to Default instead of Plain
• Note that when you add a button in interface builder, the style is automatically set to plain
• We assume that in one of the new Xcodes, the plain style of button no longer lets you apply a font via button.titleLabel?.font. Somehow whatever value that is stored in there is over-written back to the Plain font.
• The documentation doesn’t mention this oddity at all :woman-shrugging: