/////////////////////////////////////////////////// Tested
//	///////
//	implementation	///////
//	Part 2	///////
//	///////
///////////////////////////////////////////////////
//here we call Toast Bubble it inside our button "just copy it in your controller" @IBOutlet weak var txtPassword: UITextField! @IBOutlet weak var txtUserName: UITextField! //MARK: Login Action @IBAction func btnLoginPressed(_ sender: UIButton) { if txtUserName.text == "" { //Call UIView extension method self.view.showToast(toastMessage: "Please Enter Username,beacuse it is necessary to add For getting logged in.", duration: 1.1) } else if txtPassword.text == "" { self.view.showToast(toastMessage: "Please Enter Password.", duration: 1.1) } else { //Do login } }
///////////////////////////////////////////////////
//	///////
//	create Toast	///////
//	Part 1	///////
//	///////
///////////////////////////////////////////////////
//This is Extention of toast "it will stay outside controller"
import UIKit
//MARK: Add Toast method function in UIView Extension so can use in whole project.
extension UIView
{ func showToast(toastMessage:String,duration:CGFloat) { //View to blur bg and stopping user interaction let bgView = UIView(frame: self.frame) bgView.backgroundColor = UIColor(red: CGFloat(255.0/255.0), green: CGFloat(255.0/255.0), blue: CGFloat(255.0/255.0), alpha: CGFloat(0.6)) bgView.tag = 555 //Label For showing toast text let lblMessage = UILabel() lblMessage.numberOfLines = 0 lblMessage.lineBreakMode = .byWordWrapping lblMessage.textColor = .white lblMessage.backgroundColor = .black lblMessage.textAlignment = .center lblMessage.font = UIFont.init(name: "Helvetica Neue", size: 17) lblMessage.text = toastMessage //calculating toast label frame as per message content let maxSizeTitle : CGSize = CGSize(width: self.bounds.size.width-16, height: self.bounds.size.height) var expectedSizeTitle : CGSize = lblMessage.sizeThatFits(maxSizeTitle) // UILabel can return a size larger than the max size when the number of lines is 1 expectedSizeTitle = CGSize(width:maxSizeTitle.width.getminimum(value2:expectedSizeTitle.width), height: maxSizeTitle.height.getminimum(value2:expectedSizeTitle.height)) lblMessage.frame = CGRect(x:((self.bounds.size.width)/2) - ((expectedSizeTitle.width+16)/2) , y: (self.bounds.size.height/2) - ((expectedSizeTitle.height+16)/2), width: expectedSizeTitle.width+16, height: expectedSizeTitle.height+16) lblMessage.layer.cornerRadius = 8 lblMessage.layer.masksToBounds = true lblMessage.padding = UIEdgeInsets(top: 4, left: 4, bottom: 4, right: 4) bgView.addSubview(lblMessage) self.addSubview(bgView) lblMessage.alpha = 0 UIView.animateKeyframes(withDuration:TimeInterval(duration) , delay: 0, options: [] , animations: { lblMessage.alpha = 1 }, completion: { sucess in UIView.animate(withDuration:TimeInterval(duration), delay: 8, options: [] , animations: { lblMessage.alpha = 0 bgView.alpha = 0 }) bgView.removeFromSuperview() }) }
}
extension CGFloat
{ func getminimum(value2:CGFloat)->CGFloat { if self < value2 { return self } else { return value2 } }
}
//MARK: Extension on UILabel for adding insets - for adding padding in top, bottom, right, left.
extension UILabel
{ private struct AssociatedKeys { static var padding = UIEdgeInsets() } var padding: UIEdgeInsets? { get { return objc_getAssociatedObject(self, &AssociatedKeys.padding) as? UIEdgeInsets } set { if let newValue = newValue { objc_setAssociatedObject(self, &AssociatedKeys.padding, newValue as UIEdgeInsets?, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC) } } } override open func draw(_ rect: CGRect) { if let insets = padding { self.drawText(in: rect.inset(by: insets)) } else { self.drawText(in: rect) } } override open var intrinsicContentSize: CGSize { get { var contentSize = super.intrinsicContentSize if let insets = padding { contentSize.height += insets.top + insets.bottom contentSize.width += insets.left + insets.right } return contentSize } }
}