swift SWIFT - 扩展为UITextField加下划线

Posted 2021-05-19

See: http://purelywebdesign.co.uk/tutorial/swift-underlined-text-field-tutorial/
Source: BorgGreen

01. EXTENSION

import UIKit
extension UITextField {
    
    func underlined(){
        let border = CALayer()
        let width = CGFloat(1.0)
        border.borderColor = UIColor.darkGray.cgColor
        border.frame = CGRect(x: 0, y: self.frame.size.height - width, width:  self.frame.size.width, height: self.frame.size.height)
        border.borderWidth = width
        self.layer.addSublayer(border)
        self.layer.masksToBounds = true
    }
}

02. IN VC

@IBOutlet weak var txtUserName: UITextField!

//Underline text field (extension: xTextField)
        txtUserName.underlined()