the button works only once - ios

Question

I have a page which contains two text fields, 2 labels and a button. When the button is clicked I am just checking if the fields are not empty and validate them. This works fine. But I can click the button only once. After that nothing will change and I'm not able to press the button or edit the text fields!
This is my code:
#IBAction func loginbtn(_ sender: Any) {
showActivityIndicator(uiView: view)
emailerrormsg.isHidden=true
passworderrormsg.isHidden=true
if emailtf.text == "" && passwordtf.text == "" {
emailerrormsg.text = "Email is required!"
emailerrormsg.isHidden = false
passworderrormsg.text = "Password is required!"
passworderrormsg.isHidden = false
stopActivityIndicator()
}
else if emailtf.text == ""{
emailerrormsg.text = "Email is required!"
emailerrormsg.isHidden = false
stopActivityIndicator()
}
else if !(isValidEmail(testStr: emailtf.text!)){
emailerrormsg.text = "Please enter a valid email!"
emailerrormsg.isHidden = false
stopActivityIndicator()
}else if passwordtf.text == "" {
passworderrormsg.text = "Password is required!"
passworderrormsg.isHidden = false
stopActivityIndicator()
}
else{
hashedpass = (passwordtf.text!).sha1()
self.login(email: emailtf.text!, password: hashedpass)
}
}
What am I doing wrong?
func stopActivityIndicator(){
DispatchQueue.main.async {
self.loadingView.isHidden = true
}
}
func showActivityIndicator(uiView: UIView) {
let container: UIView = UIView()
container.frame = uiView.frame
container.center = uiView.center
loadingView.frame = CGRect(x: 0,y: 0,width: 80,height: 80)
loadingView.center = uiView.center
loadingView.backgroundColor = UIColor(red:0.16, green:0.27, blue:0.60, alpha:1.0)
loadingView.clipsToBounds = true
loadingView.layer.cornerRadius = 10
let actInd: UIActivityIndicatorView = UIActivityIndicatorView()
actInd.frame = CGRect(x: 0.0,y: 0.0,width: 40.0,height: 40.0);
actInd.activityIndicatorViewStyle =
UIActivityIndicatorViewStyle.whiteLarge
actInd.center = CGPoint(x: loadingView.frame.size.width / 2,y: loadingView.frame.size.height / 2);
loadingView.addSubview(actInd)
container.addSubview(loadingView)
uiView.addSubview(container)
actInd.startAnimating()
}

Answer 1

You are hiding loading view in the stop method. Instead, hide container view. For this, you would need to make container view a class level object(just as you have made loading view)