Vanishing popup alert view - ios

Question

I'd like to popup a view with a single label in it that disappears slowly within one second to inform the user about a choice he made, an update occurred or whatever.
I use animatewithduration, but because they may be many different alerts, I'd like to create a class to avoid creating view, label and func in any UIViewController that may display that kind of alert ... Kind of :
let doneAlert = PopUpAlert(parentView : self, textAlert : "You're done")
where parentView in the view where I want the textAlert to be displayed and then when needed:
doneAlert.display()
Here's the class I wrote :
class PopUpAlert: UIView {
convenience init(parentView : UIView,textAlert : String) {
self.init(frame: CGRect(x: 0, y: 0, width: 200, height: 150))
self.alpha = 0
self.center = parentView.center
let popUpLabel = UILabel(frame: CGRect(x: 0, y: 0, width: 200, height: 150))
popUpLabel.center = self.center
popUpLabel.text = textAlert
self.addSubview(popUpLabel)
parentView.addSubview(self)
}
func display() {
PopUpAlert.animateWithDuration(0.5, delay: 0.0, options: UIViewAnimationOptions.CurveEaseOut, animations: {
self.alpha = 1.0
}, completion: nil)
PopUpAlert.animateWithDuration(1.0, delay: 0.5, options: UIViewAnimationOptions.CurveEaseIn, animations: {
self.alpha = 0.0
}, completion: nil)
}
}
And here's the way I use it :
class CarteVC: UIViewController {
var daddy : RootViewController?
var goAlert : PopUpAlert?
#IBOutlet weak var mapView: MKMapView!
override func viewDidLoad() {
super.viewDidLoad()
goAlert = PopUpAlert(parentView: mapView, textAlert: "On the way ....")
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
let bb = UIBarButtonItem(title: "< List", style: .Plain, target: papa!, action: "pred")
bb.tintColor = UIColor.lightGrayColor()
daddy!.navigationItem.leftBarButtonItem = bb
daddy!.navigationItem.rightBarButtonItem = nil
goAlert!.display()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Navigation
Nothing is displayed.

Answer 1

If you want to just alert user and disappear in one second than i would suggest you to use Toast Swift
https://github.com/scalessec/Toast-Swift
Here is how you make the toast
self.view.makeToast("Testing Toast")
// specific duration and position
self.view.makeToast("Testing Toast with duration and position", duration: 3.0, position: .Top)
// toast with image and all possible
self.view.makeToast("testing toast image and all possible ", duration: 2.0, position: CGPoint(x: 110.0, y: 110.0), title: "Toast Title", image: UIImage(named: "toast.png"), style:nil) { (didTap: Bool) -> Void in
if didTap {
print("with tap")
} else {
print("without tap")
}
}

Answer 2

The pb came from centering the label inside the view ... Here's the class and works perfectly fine !!! :
class PopUpAlert: UIView {
convenience init(parentView : UIView,textAlert : String) {
self.init(parentView: parentView,textAlert: textAlert,background: UIColor.darkGrayColor(),foreground: UIColor.whiteColor())
}
convenience init(parentView : UIView,textAlert : String, background : UIColor) {
self.init(parentView: parentView,textAlert: textAlert,background: background,foreground: UIColor.whiteColor())
}
convenience init(parentView : UIView,textAlert : String, foreground : UIColor) {
self.init(parentView: parentView,textAlert: textAlert,background: UIColor.darkGrayColor(),foreground: foreground)
}
convenience init(parentView : UIView,textAlert : String, background : UIColor, foreground : UIColor) {
self.init(frame: CGRect(x: 0, y: 0, width: 150, height: 40))
self.alpha = 0
self.backgroundColor = background
self.layer.cornerRadius = 5
self.layer.masksToBounds = true
self.center = (parentView.superview ?? parentView).center
let popUpLabel = UILabel(frame: CGRect(x: 0, y: 0, width: 150, height: 40))
popUpLabel.textAlignment = .Center
popUpLabel.textColor = foreground
popUpLabel.text = textAlert
self.addSubview(popUpLabel)
parentView.addSubview(self)
}
deinit {
self.removeFromSuperview()
}
func display() {
PopUpAlert.animateWithDuration(0.5, delay: 0.0, options: UIViewAnimationOptions.CurveEaseOut, animations: {
self.alpha = 0.85
}, completion: nil)
PopUpAlert.animateWithDuration(1.0, delay: 0.7, options: UIViewAnimationOptions.CurveEaseIn, animations: {
self.alpha = 0.0
}, completion: nil)
}