Underlined text of a UITextField causes the whole text field to get underlined

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Created Aug ’20

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When you underline some text of a UITextField and then click out of it, if the cursor was within the underlined text, the whole text field gets underlined. Is there a way to avoid this? UITextView doesn't exhibit this behavior, but it's a lot of work for me to switch at this point.

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Answer 1

GoodBrue OP

Aug ’20

I thought I'd add an example where you can see the difference between the underlining in a text field vs a text view. I made the text view look and behave like a text field.

import UIKit

class ViewController: UIViewController, UITextViewDelegate {

var textViewPlaceholder1: UILabel!
var textViewPlaceholders = [UILabel]() // needed if more than one text view

let kFontSize: CGFloat = 17.0
let kPlaceholderLeftInset: CGFloat = 8.0

override func viewDidLoad() {

super.viewDidLoad()

let textView1Frame = CGRect(x: 20.0, y: 100.0, width: 300.0, height: 34.0)
let textView1 = makeTextView(withFrame: textView1Frame)
textView1.tag = 0
view.addSubview(textView1)

let textViewPlaceholder1Frame = CGRect(x: textView1Frame.origin.x + kPlaceholderLeftInset,
   y: textView1Frame.origin.y,
   width: textView1Frame.width,
   height: textView1Frame.height)
textViewPlaceholder1 = UILabel(frame: textViewPlaceholder1Frame)
textViewPlaceholder1.attributedText = NSAttributedString(string: "Text view 1...", attributes: [.foregroundColor : UIColor.systemGray3, .font : UIFont.systemFont(ofSize: kFontSize)])
textViewPlaceholder1.isHidden = true
textViewPlaceholders.append(textViewPlaceholder1)
view.addSubview(textViewPlaceholder1)

let textField2 = UITextField(frame: CGRect(x: 20.0, y: 150.0, width: 300.0, height: 34.0))
textField2.font = .systemFont(ofSize: kFontSize)
textField2.borderStyle = UITextField.BorderStyle.roundedRect
textField2.allowsEditingTextAttributes = true
textField2.placeholder = "Text field 2..."
view.addSubview(textField2)

}

func makeTextView(withFrame: CGRect) -> UITextView {

let textView = UITextView(frame: withFrame)
textView.delegate = self
textView.layer.cornerRadius = 5.0
textView.layer.borderWidth = 1.0
textView.layer.borderColor = UIColor.systemGray4.cgColor
textView.textContainerInset = UIEdgeInsets(top: 7.0, left: 2.0, bottom: 5.0, right: 5.0)
textView.font = .systemFont(ofSize: kFontSize)
textView.allowsEditingTextAttributes = true

return textView
}

func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {

guard text.rangeOfCharacter(from: CharacterSet.newlines) == nil else {
textView.resignFirstResponder() // uncomment this to close the keyboard when return key is pressed
return false
}

if (range.location > 0 || text.count != 0) {
textViewPlaceholders[textView.tag].isHidden = true
} else {
textViewPlaceholders[textView.tag].isHidden = false
}

return true
}
}

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