How to Toast message in Swift?

extension UIViewController {

func showToast(message : String) {

    let toastLabel = UILabel(frame: CGRect(x: self.view.frame.size.width/2 - 75, y: self.view.frame.size.height-100, width: 150, height: 35))
    toastLabel.backgroundColor = UIColor.black.withAlphaComponent(0.6)
    toastLabel.textColor = UIColor.white
    toastLabel.textAlignment = .center;
    toastLabel.font = UIFont(name: "Montserrat-Light", size: 12.0)
    toastLabel.text = message
    toastLabel.alpha = 1.0
    toastLabel.layer.cornerRadius = 10;
    toastLabel.clipsToBounds  =  true
    self.view.addSubview(toastLabel)
    UIView.animate(withDuration: 4.0, delay: 0.1, options: .curveEaseOut, animations: {
         toastLabel.alpha = 0.0
    }, completion: {(isCompleted) in
        toastLabel.removeFromSuperview()
    })
} }

How do i add a cancel on a navigation bar programatically

let btnCancel = UIButton()

btnCancel.setImage(UIImage(named: "crossbuttonimagename"), forState: .Normal)

btnCancel.frame = CGRectMake(0, 0, 25, 25)

btnCancel.addTarget(self, action: Selector("youraction"), forControlEvents: .TouchUpInside)

//Set Left Bar Button item

let leftBarButton = UIBarButtonItem()

leftBarButton.customView = btnCancel

self.navigationItem.leftBarButtonItem = leftBarButton

UIView Hide/Show with animation

function: 

 func setView(view: UIView, hidden: Bool) {

     UIView.transition(with: view, duration: 0.5, options: .transitionCrossDissolve, animations: { _ in

          view.isHidden = hidden

     }, completion: nil) 

}

usage:

@IBOutlet weak var updateprofileview: UIView!

 @IBAction func updateProfileViewAction(_ sender: Any) {

        

        if updateprofileview.isHidden {

            setView(view: updateprofileview, hidden: false)

        } else {

            setView(view: updateprofileview, hidden: true)

        }

    }


note: design view in stack view 

how to enable unit test cases for already existing project in swift 3

First of all just add new Target via File > New > Target... and select iOS Unit Testing Bundle. Done.

RoundCorners(individual border radius) for Label or Text field or button

Function: 

extension UIView {

    func roundCorners(corners:UIRectCorner, radius: CGFloat) {

        let path = UIBezierPath(roundedRect: self.bounds, byRoundingCorners: corners, cornerRadii: CGSize(width: radius, height: radius))

        let mask = CAShapeLayer()

        mask.path = path.cgPath

        self.layer.mask = mask

    }

}

Usage:

override func viewDidLoad() {

        super.viewDidLoad()

        self.automaticallyAdjustsScrollViewInsets = false

        Label.roundCorners(corners: [.topLeft, .bottomLeft], radius: 8)

     

        }

Textfield padding

Function:

extension UITextField {

    func setLeftPaddingPoints(_ amount:CGFloat){

        let paddingView = UIView(frame: CGRect(x: 0, y: 0, width: amount, height: self.frame.size.height))

        self.leftView = paddingView

        self.leftViewMode = .always

    }

    func setRightPaddingPoints(_ amount:CGFloat) {

        let paddingView = UIView(frame: CGRect(x: 0, y: 0, width: amount, height: self.frame.size.height))

        self.rightView = paddingView

        self.rightViewMode = .always

    }

}

Usage:

override func viewDidLoad() {

        super.viewDidLoad()

  textfield.setLeftPaddingPoints(8)

}

     

Apply Radius to button

registration_button.layer.cornerRadius = 5