Remove subview created for activityIndicator with swift - ios

Question

i have created an activity window function which takes 3 inputs,
msg:String - the message which should show in the activity window
indicator:Bool - if the activity window should show or not
view:UIView - the uiview which should get the frame sizes etc from the View Controller which its called on
everything works fine, except the part where subview needs to be removed.if the same function is run on the main view controller. it works fine. just when i moved it to NSObject, it does not. please help
class UIDesignFunction: NSObject {
func progressBarDisplayer(msg:String, indicator:Bool, view:UIView) {
var activityIndicator = UIActivityIndicatorView()
var strLabel = UILabel()
var msgFrame = UIView()
if indicator{
//println(msg)
strLabel = UILabel(frame: CGRect(x: 50, y: 0, width: 200, height: 50))
strLabel.text = msg
strLabel.textColor = UIColor.whiteColor()
msgFrame = UIView(frame: CGRect(x: view.frame.midX - 90, y: view.frame.midY - 25 , width: 180, height: 50))
msgFrame.layer.cornerRadius = 15
msgFrame.backgroundColor = UIColor(white: 0, alpha: 0.7)
activityIndicator = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.White)
activityIndicator.frame = CGRect(x: 0, y: 0, width: 50, height: 50)
activityIndicator.startAnimating()
msgFrame.addSubview(activityIndicator)
UIApplication.sharedApplication().beginIgnoringInteractionEvents()
msgFrame.addSubview(strLabel)
view.addSubview(msgFrame)
}else{
UIApplication.sharedApplication().endIgnoringInteractionEvents()
msgFrame.removeFromSuperview()
}
}

Answer 1

move the variables out of the function like below
class UIDesignFunction: NSObject {
var activityIndicator = UIActivityIndicatorView()
var strLabel = UILabel()
var msgFrame = UIView()
func progressBarDisplayer(msg:String, indicator:Bool, view:UIView) {
if indicator{
//println(msg)
strLabel = UILabel(frame: CGRect(x: 50, y: 0, width: 200, height: 50))
strLabel.text = msg
strLabel.textColor = UIColor.whiteColor()
msgFrame = UIView(frame: CGRect(x: view.frame.midX - 90, y: view.frame.midY - 25 , width: 180, height: 50))
msgFrame.layer.cornerRadius = 15
msgFrame.backgroundColor = UIColor(white: 0, alpha: 0.7)
activityIndicator = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.White)
activityIndicator.frame = CGRect(x: 0, y: 0, width: 50, height: 50)
activityIndicator.startAnimating()
msgFrame.addSubview(activityIndicator)
UIApplication.sharedApplication().beginIgnoringInteractionEvents()
msgFrame.addSubview(strLabel)
view.addSubview(msgFrame)
}else{
UIApplication.sharedApplication().endIgnoringInteractionEvents()
msgFrame.removeFromSuperview()
}
}