Theprogrammersfirst: Swift -How to get the center frame of a button's titleLabel and not the button itself

2020-09-30

Swift -How to get the center frame of a button's titleLabel and not the button itself

I have a custom segmented control with 4 segments with a button in each segment. I had to make a change to the button's contentEdgeInsets:

// eg of the second button
customSegmentedControl.secondButton?.contentEdgeInsets = UIEdgeInsets(top: 0, left: -35, bottom: 0, right: 0)

The slider originally slid to each segment using button.frame.midX. After changing the contentEdgeInsets when the slider slides to a segment it looks as if it's in the wrong position because the title is no longer in the center of the button. I tried to change the slider to slide to the center of the button's button.titleLabel: button.titleLabel!.frame.midX but a weird bug occurs where the slider slides incorrectly.

for button in buttons {
            
    UIView.animate(withDuration: 0.2, animations: {

        self.slider.frame.origin.x = button.titleLabel!.frame.midX // button.frame.midX was what was originally used
         // if it's the selected button break ...
    })
}

How can I get the slider to slide to the center of the button's titleLabel? For example I want it to slide to the middle of the word Pencil which is the title of the button with its contentEdgeInsets changed and not the button itself.