UITextField custom underline in Swift - ios

Question

I have a question about making an underline on UITextField.
I am trying to make an underline with bar on each end as shown below.
I tried the following and got this one. There is no bar on the right end.
extension UITextField {
func underline() {
let borderWidth = CGFloat(1.0)
let endBorderHeight = CGFloat(10.0)
let bottom = CALayer()
bottom.frame = CGRect(
x: 1,
y: self.frame.height - borderWidth,
width: self.frame.width - 2,
height: borderWidth)
bottom.borderWidth = borderWidth
bottom.borderColor = UIColor.lightGrayColor().CGColor
let leftEndBorder = CALayer()
leftEndBorder.frame = CGRect(
x: 0,
y: self.frame.height - endBorderHeight,
width: borderWidth,
height: endBorderHeight)
leftEndBorder.borderWidth = borderWidth
leftEndBorder.borderColor = UIColor.lightGrayColor().CGColor
print(bottom.frame.width)
let rightEndBorder = CALayer()
rightEndBorder.frame = CGRect(
x: self.frame.width - 1,
y: self.frame.height - endBorderHeight,
width: borderWidth,
height: endBorderHeight)
rightEndBorder.borderWidth = borderWidth
rightEndBorder.borderColor = UIColor.lightGrayColor().CGColor
self.layer.addSublayer(leftEndBorder)
self.layer.addSublayer(bottom)
self.layer.addSublayer(rightEndBorder)
self.layer.masksToBounds = true
}
}
I could make the bar on left side but having trouble making the right side because of the wrong x position of the rightEndBorder probably?
Can anyone tell me what I am doing wrong??
----- edit
I tried to set the x-position of the rightEndBorder to 200 and it gave me the following.
But if I tried to set it to 300, I don't see it anymore.
----- edit
Checked if the entire textfield was shown on the screen.
----- edit
It was that the leading and trailing constraints that changed the width of the textField I guess.
----- Solution
The problem was that I had leading and trailing constraints on the textField and those constraints changed the width after the unline was inserted. After searching google, I figured that I had to make the underline after the constraints were applied which is in the function viewDidLayoutSubviews().

Answer 1

Re-typing from comments section as an answer.
The problem seems to be either that the view is getting cut off (thus you will not see the right border) or the right end border is being shifted farther right after setting. Reason for suspecting this is from your picture where the right border is placed at x = 200 because it is well past half along the bottom border line but should be only be 40% of the way along the line.
Update:
The correct answer to this question was the constraints imposed caused the textfield width to change.