iOS-extensions.swift

// String Extensions to encode/decode to Base64, capitalized first character.....
extension String{
    
    // Decode String from Base64
    func fromBase64() -> String? {
        guard let data = Data(base64Encoded: self) else {
            return nil
        }
        return String(data: data, encoding: .utf8)
    }
    // Encode String to Base64
    func toBase64() -> String {
        return Data(self.utf8).base64EncodedString()
    }
    
    // Make First Character Capitalized
    func capitalizingFirstLetter() -> String {
        let first = String(self.prefix(1)).capitalized
        let other = String(self.dropFirst())
        return first + other
    }
}

// View Controller Extensions to hide keyboard on touch.................
extension UIViewController {
    func hideKeyboardWhenTappedAround() {
        let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(UIViewController.dismissKeyboard))
        tap.cancelsTouchesInView = false
        view.addGestureRecognizer(tap)
    }
    
    @objc func dismissKeyboard() {
        view.endEditing(true)
    }
}

// TextField Extensions to shake textfield
extension UITextField {
    func isError(baseColor: CGColor, numberOfShakes shakes: Float, revert: Bool) {
        let animation: CABasicAnimation = CABasicAnimation(keyPath: "shadowColor")
        animation.fromValue = baseColor
        animation.toValue = UIColor.red.cgColor
        animation.duration = 0.4
        if revert { animation.autoreverses = true } else { animation.autoreverses = false }
        self.layer.add(animation, forKey: "")
        
        let shake: CABasicAnimation = CABasicAnimation(keyPath: "position")
        shake.duration = 0.07
        shake.repeatCount = shakes
        if revert { shake.autoreverses = true  } else { shake.autoreverses = false }
        shake.fromValue = NSValue(cgPoint: CGPoint(x: self.center.x - 10, y: self.center.y))
        shake.toValue = NSValue(cgPoint: CGPoint(x: self.center.x + 10, y: self.center.y))
        self.layer.add(shake, forKey: "position")
    }
}

// UILabel Extension to shake Label
extension UILabel {
    func isError(baseColor: CGColor, numberOfShakes shakes: Float, revert: Bool) {
        let animation: CABasicAnimation = CABasicAnimation(keyPath: "shadowColor")
        animation.fromValue = baseColor
        animation.toValue = UIColor.red.cgColor
        animation.duration = 0.4
        if revert { animation.autoreverses = true } else { animation.autoreverses = false }
        self.layer.add(animation, forKey: "")
        
        let shake: CABasicAnimation = CABasicAnimation(keyPath: "position")
        shake.duration = 0.07
        shake.repeatCount = shakes
        if revert { shake.autoreverses = true  } else { shake.autoreverses = false }
        shake.fromValue = NSValue(cgPoint: CGPoint(x: self.center.x - 10, y: self.center.y))
        shake.toValue = NSValue(cgPoint: CGPoint(x: self.center.x + 10, y: self.center.y))
        self.layer.add(shake, forKey: "position")
    }
}

// Method to called textfiled shake extension....
func shake(_ textField:UITextField){
    textField.isError(baseColor: UIColor.gray.cgColor, numberOfShakes: 2, revert: true)
}

// Method to call label shake extension....
func shakeLabel(_ label: UILabel){
    label.isError(baseColor: UIColor.gray.cgColor, numberOfShakes: 2, revert: true)
    
}