I have created a button and I was wondering how do I programmatically code an action for the UIButton to take me to another view controller?
This is all I have so far:
let getStartedButton: UIButton = {
let getStartedButton = UIButton()
getStartedButton.backgroundColor = UIColor(red:0.24, green:0.51, blue:0.59, alpha:1.0)
getStartedButton.setTitle("Get Started", for: .normal)
getStartedButton.titleLabel?.font = UIFont(name: "Helvetica Bold", size: 18)
getStartedButton.translatesAutoresizingMaskIntoConstraints = false
getStartedButton.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
return getStartedButton
}()
#objc func buttonAction(sender: UIButton!) {
print("...")
}
If you want to make the transition to another ViewController after pressing the button, you can do this in 2 ways:
1) present(_:animated:completion:)
#objc func buttonAction(sender: UIButton!) {
let vc = self.storyboard?.instantiateViewController(withIdentifier: "Main") as! SecondViewController
self.present(vc, animated: true, completion: nil)
}
2) pushViewController(_:animated:)
#objc func buttonAction(sender: UIButton!) {
let vc = self.storyboard?.instantiateViewController(withIdentifier: "Main") as! SecondViewController
self.navigationController?.pushViewController(vc, animated: true)
}
There are 3 ways you can show a new View Controller:
Presenting View Controller:
#objc func buttonAction(sender: UIButton!) {
let destinationVC = self.storyboard?.instantiateViewController(withIdentifier: "DestinationViewController") as! DestinationViewController
self.present(destinationVC, animated: true, completion: nil)
}
Performing a Segue from Storyboard:
If you already have the View Controller you want to present in your Storyboard, and it has a segue from your origin VC to your destination VC, then you can add an identifier to the segue and do this...
#objc func buttonAction(sender: UIButton!) {
self.performSegue(withIdentifier: "MySegueIdentifier", sender: self)
}
Pushing View Controller onto Stack (this only works if your original VC is embedded in a Navigation Controller):
#objc func buttonAction(sender: UIButton!) {
let destinationVC = self.storyboard?.instantiateViewController(withIdentifier: "DestinationViewController") as! DestinationViewController
self.navigationController?.pushViewController(destinationVC, animated: true)
}
Related
my viewcontroller flow will be like below:
navigationcontroller -> logoutviewcontroller ->(present)
viewcontroller -> (present) logoutviewcontroller (bar button coming)
|
loginviewcontroller
|
(present) logoutviewcontroller (bar button not coming)
logoutVC code:
override func viewDidLoad() {
super.viewDidLoad()
navigationItem.leftBarButtonItem = UIBarButtonItem(title: "logout", style: .plain, target: self, action: #selector(handleLogout))
}
#objc func handleLogout(){
let vc = self.storyboard?.instantiateViewController(withIdentifier: "ViewController") as! ViewController
self.present(vc, animated: true, completion: nil)
}
loginVC code: when presenting logoutVC coming but bar button not coming.. why
#IBAction func loginButn(_ sender: Any) {
guard let email = emailTf.text, let password = passwordTf.text
else {
print("form is not valid")
return
}
Auth.auth().signIn(withEmail: email, password: password, completion: { (user, error) in
if error != nil{
print("login adding error: \(String(describing: error))" as Any)
return
}
print("login sucessfully")
let vc = self.storyboard?.instantiateViewController(withIdentifier: "LogOutViewController") as! LogOutViewController
self.present(vc, animated: true, completion: nil)
})
}
please suggest here with code
If by bar button you mean the navigationController's navigationBar, you don't need to present the ViewController but you need to use
self.navigationController?.pushViewController(vc, animated: true)
Basically i have a button that changes title, and if the button title is something i want the button to take the user to somewhere different to if the button title was something else
let act1 = act1ViewController()
let act2 = act2ViewController()
override func viewDidLoad() {
super.viewDidLoad()
self.buttonName.setTitle(self.text, for: .normal)
// Do any additional setup after loading the view.
}
#IBAction func buttonPressed(_ sender: UIButton) {
if text == "cheer up" {
self.present(act1, animated: true, completion: nil)
}
else if text == "yay" {
self.present(act2, animated: true, completion: nil)
}
}
Instantiate the ViewController depending on the if check, and present it:
let storyBoard: UIStoryboard = UIStoryboard(name: "MyStoryboard", bundle: nil)
let destinationVC = storyBoard.instantiateViewController(withIdentifier: "ViewControllerIdentifier") as! NewViewController
present(destinationVC, animated: true, completion: nil)
Just remember to set the Identificator in the Storyboard
If the 2 controllers that you want to show are,
class Act1ViewController: UIViewController {
//your code...
}
class Act2ViewController: UIViewController {
//your code...
}
You simply need to put a switch-case on buttonName's title and present the relevant controller act1 or act2. Create act1 and act2 using the storyboard.
#IBAction func buttonPressed(_ sender: UIButton) {
switch sender.titleLabel?.text {
case "cheer up":
if let act1 = self.storyboard?.instantiateViewController(withIdentifier: "Act1ViewController") as? Act1ViewController {
self.present(act1, animated: true, completion: nil)
}
case "yay":
if let act2 = self.storyboard?.instantiateViewController(withIdentifier: "Act2ViewController") as? Act2ViewController {
self.present(act2, animated: true, completion: nil)
}
default:
break
}
}
}
Don't forget to set Act1ViewController and Act2ViewController as storyboardID of the respective controllers in the storyboard.
I have a button in UITableViewController. when I press this button, alert controller appears asks if the user wants to go to the cart page or stay in the same page, as follows,
if user?.uid != nil{
let title = "Item is added to your cart "
let alert = AlertController.instance(title: title)
present(alert, animated: true, completion: nil)
} else{
// Alert asks user to register..
}
AlertController is in different class and I created it with custom animation.
I want when user press (go to cart page) button, the cart page is displayed as if it was as (show,"push") segue.
This is how I pushed the view controller programmatically in alert controller class.
#IBAction func showCartButton(_ sender: Any) {
//---> go to cart page ...
print("cart button pressed")
//-----> this code is working fine with other UIviewcontrollers (however it is 'not working in UItableviewcontroller)
let storyBoard : UIStoryboard = UIStoryboard(name: "Cart", bundle:nil)
let CartViewController = storyBoard.instantiateViewController(withIdentifier: "CartPage")
navigationController?.pushViewController(CartViewController, animated: true)
//-----> this code shows the cart page without the navigation and tabs..
// let storyBoard : UIStoryboard = UIStoryboard(name: "Cart", bundle:nil)
// let CartViewController = storyBoard.instantiateViewController(withIdentifier: "CartPage")
// self.present(CartViewController, animated:true, completion:nil)
}
The push view controller is not working with Alert controller, I am not sure if it is because I used the navigation with the alert, and if so, is there a way I can push the view controller??
This is the whole AlertController Class I created in seperate storyboard and put it as initial view controller..
import UIKit
class AlertController: UIViewController{
#IBOutlet weak fileprivate var AddProductToCartLabel: UILabel!
#IBOutlet weak fileprivate var cartButton: UIButton!
#IBOutlet weak fileprivate var shoppingButton: UIButton!
#IBOutlet weak fileprivate var container: UIView!
var text = String()
override func viewDidLoad() {
setContainer()
setCartButton()
setShoppingButton()
}
override func viewDidLayoutSubviews() {
layoutContainer()
}
#IBAction func cancel(_ sender: Any) {
dismiss(animated: true, completion: nil)
}
#IBAction func showCartButton(_ sender: Any) {
//---> go to cart page ...
print("cart button pressed")
let storyBoard : UIStoryboard = UIStoryboard(name: "Cart", bundle:nil)
let CartViewController = storyBoard.instantiateViewController(withIdentifier: "CartPage")
navigationController?.pushViewController(CartViewController, animated: true)
// let storyBoard : UIStoryboard = UIStoryboard(name: "Cart", bundle:nil)
// let CartViewController = storyBoard.instantiateViewController(withIdentifier: "CartPage")
// self.present(CartViewController, animated:true, completion:nil)
}
#IBAction func completeShopButton(_ sender: Any) {
dismiss(animated: true, completion: nil)
}
}
fileprivate extension AlertController{
// to set the view above
func setContainer() {
let shape = CAShapeLayer()
shape.fillColor = UIColor.white.cgColor
container.backgroundColor = UIColor.clear
container.layer.insertSublayer(shape, at: 0)
}
func setCartButton(){
cartButton.clipsToBounds = true
//cartButton.layer.cornerRadius = 10
}
func setShoppingButton(){
shoppingButton.clipsToBounds = true
shoppingButton.layer.borderColor = UIColor.darkGray.cgColor
shoppingButton.layer.borderWidth = 1
//shoppingButton.layer.cornerRadius = 10
}
}
fileprivate extension AlertController{
// design the size of the container
func layoutContainer() {
let path = UIBezierPath(roundedRect: container.bounds, cornerRadius: 10)
let layer = container.layer.sublayers?.first as! CAShapeLayer
layer.path = path.cgPath
}
}
extension AlertController{
static func instance(title: String?) -> AlertController{
let storyboard = UIStoryboard(name: String(describing: self), bundle: Bundle(for: self))
let controller = storyboard.instantiateInitialViewController() as! AlertController
controller.text = title!
return controller
}
}
The problem is that when you try to push CartViewController, there is no navigation controller to push it on.
You present AlertController modally, and then try to do:
navigationController?.pushViewController(CartViewController, animated: true). If you put a breakpoint here and print out navigationController, I expect it is nil.
I suggest you have AlertController delegate back to your UITableViewController that is inside a navigation controller, and have the tableview controller push to the next screen. You could also present AlertController inside of a navigation view, but this seems unnecessary.
I am using iCarousel and I have to create my own button. I want to pass data from the button made programmatically to another view, but I don't have a segue identifier because I created the button programmatically. I don't know if it is possible to create the identifier of the segue programmatically.
button.addTarget(self, action: #selector(buttonAction3), for: .touchUpInside)
button.setTitle("\(titulos[index])", for: .normal)
tempView.addSubview(button)
let myImage = UIImage(named: "modo4.png") as UIImage?
button.setImage(myImage, for: .normal)
let viewController:UIViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "modo") as! Modo1ViewController
self.present(viewController, animated: false, completion: nil)
if segue.identifier == "" {
if let destination = segue.destination as? Modo1ViewController {
destination.nomb = nombres
}
}
Create seuge
Assign identifier
and your button target
#IBAction func button_clicked(_ sender: UIButton) {
self.performSegue(withIdentifier: "segueToNext", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "segueToNext" {
if let destination = segue.destination as? Modo1ViewController {
destination.nomb = nombres // you can pass value to destination view controller
// destination.nomb = arrayNombers[(sender as! UIButton).tag] // Using button Tag
}
}
}
in your case, if you use self.present and you want to send data between views. Try this:
let viewController:UIViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "modo") as! Modo1ViewController
viewController.nomb = nombres
self.present(viewController, animated: false, completion: nil)
I don't know how to set segue's identifier but I think code above can help
If you want do to easier work, you can create segue in IB (Interface Builder) and set it's identifier, then use
performSegue:withIdentifier:sender
I wonder how to create a function that move to the login page after click login button, with code/programmatic way.
There is my code:
final class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let loginButton = UIButton(frame: CGRectMake(20, 640, 175, 75))
loginButton.setTitle("Login", forState: UIControlState.Normal)
loginButton.backgroundColor = UIColor.init(red: 255, green: 215, blue: 0, alpha: 0.8)
loginButton.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
loginButton.titleLabel!.font = UIFont(name: "StarJediSpecialEdition", size: 30)
loginButton.addTarget(self,
action: #selector(ViewController.tapActionButton),
forControlEvents: UIControlEvents.TouchUpInside)
self.view.addSubview(loginButton)
}
func tapActionButton(sender:UIButton!) {
print("Button is working")
}
}
There are multiple ways how you create your login page UIViewController:
From xib, for example, you can inherit your controller from this class:
class XibLoadedVC: UIViewController {
required init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented") }
required init() {
print("init \(type(of: self))")
let bundle = Bundle(for: type(of: self))
super.init(nibName: String(describing: type(of: self)), bundle: bundle)
}
}
or just
let controller = LoginPageViewController(nibName: "LoginPageViewController", bundle: nil)
From storyboard:
let storyboard = UIStoryboard(name: "MyStoryboardName", bundle: nil)
let loginPage = storyboard.instantiateViewControllerWithIdentifier("LoginPageViewController") as! LoginPageViewController
There are multiple ways to show controller depending on how you are create it:
You can just present controller with:
func tapActionButton(sender: UIButton!) {
let loginPage = LoginPageViewController()
self.present(loginPage, animated: true)
}
Programmatically push using navigationController:
navigationController?.pushViewController(loginPage, animated: true)
Requires UINavigationController to work. As you can’t be sure, is your controller inside navigation controller stack or not, there is optional navigationController? to not crush the app :)
Storyboard and Segues:
Create segue between your ViewController and LoginPageViewController.
Give your segue an identifier and also presentation style. For this case it will be Show
Now in your ViewController override below method
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "YourSegueIdentifier"
let loginPage = segue.destinationViewController as! LoginPageViewController
}
}
On loginButton tap action:
func tapActionButton(sender: UIButton!) {
performSegueWithIdentifier("YourSegueIdentifier", sender: nil)
}
And you are done.
P.S.
Also, there is modern SwiftUI way to do all that, you can look into tutorials and official documentation.
You need to create an instance of the next view controller and then either present or push that view controller
To present modally:
self.presentViewController(nextVC, animated: true, completion: nil)
or to push:
self.navigationController?.pushViewController(nextVC, animated: true)
all that stuff with segues apply to storyboards
Cheers!