UITextField-shadow.md

Declare UITextField and setup fields. Set decorated NSAttributedString for UITextField.attributedPlaceholder to set custom color or font etc.

let textField: UITextField = {
		$0.returnKeyType = .done
		$0.attributedPlaceholder = NSAttributedString(
				string: "이메일을 입력하세요",
				attributes: [NSAttributedString.Key.foregroundColor: UIColor.systemRed.withAlphaComponent(0.7)]
		)
		$0.textAlignment = .left
		$0.font = UIFont.systemFont(ofSize: 30, weight: .bold)
		$0.tintColor = UIColor.systemGreen
		$0.setContentHuggingPriority(.required, for: .horizontal)
		return $0
}(UITextField())

Drop shadow for only text use NSShadow()

textField.addTarget(self, action: #selector(didChangeText(_:)), for: .editingChanged)

@objc
func didChangeText(_ textField: UITextField) {
		guard let text = textField.text else { return }
		textField.attributedText = shadowedAttributedText(from: text)
}

func shadowedAttributedText(from string: String) -> NSAttributedString {
		NSAttributedString(string: string, attributes: [
				NSAttributedString.Key.font: UIFont.systemFont(ofSize: 30, weight: .bold),
				NSAttributedString.Key.foregroundColor: UIColor.green,
				NSAttributedString.Key.shadow: {
						$0.shadowColor = UIColor.black.withAlphaComponent(0.5)
						$0.shadowOffset = CGSize.zero
						$0.shadowBlurRadius = 4
						return $0
				}(NSShadow())
		])
}