I'm currently trying to implement a PageViewController just like in the example below (I assume they're using one as well).
My code is set up, but I'm still struggling to get the animation right: to be exact that (just like in the example) when you swipe the main view away, it seems the view on the left was underneath the main the whole time. How do they still display a little from the main ViewController?
Additionally I've recognized that swiping seems a lot more abrupt than in my app, as if there were magnets on the edge.
Do I have to work with constraints or does it take coding?
Is it even a PageViewController or solely a subview inside of a view?
My code in case it's needed:
import UIKit
import Firebase
class RootPageViewController: UIPageViewController, UIPageViewControllerDataSource {
lazy var viewControllerList:[UIViewController] = {
let sb = UIStoryboard(name: "Main", bundle: nil)
let vc1 = sb.instantiateViewController(withIdentifier: "timelineView")
let vc2 = sb.instantiateViewController(withIdentifier: "mainView")
return [vc1, vc2]
}()
override func viewDidLoad() {
super.viewDidLoad()
self.dataSource = self
if let secondViewController = viewControllerList[1] as? MainViewController {
self.setViewControllers([secondViewController], direction: .forward, animated: true, completion: nil)
secondViewController.buttonAdd.action = #selector(addData(_:))
secondViewController.buttonReminder.addTarget(self, action: #selector(goToReminder(_:)), for: .touchUpInside)
secondViewController.buttonSettings.addTarget(self, action: #selector(goToSettings(_:)), for: .touchUpInside)
secondViewController.buttonUser.addTarget(self, action: #selector(goToProfile(_:)), for: .touchUpInside)
}
}
#objc func addData(_ sender: Any) {
performSegue(withIdentifier: "goToAdd", sender: self)
}
#objc func goToReminder(_ sender: Any) {
performSegue(withIdentifier: "goToNotifications", sender: self)
}
#objc func goToSettings(_ sender: Any) {
performSegue(withIdentifier: "goToSettings", sender: self)
}
#objc func goToProfile(_ sender: Any) {
if let user = Auth.auth().currentUser {
self.performSegue(withIdentifier: "goToEdit", sender: self)
} else {
performSegue(withIdentifier: "goToProfile", sender: self)
}
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
guard let vcIndex = viewControllerList.firstIndex(of: viewController) else { return nil }
let previousIndex = vcIndex - 1
guard previousIndex >= 0 else { return nil }
guard viewControllerList.count > previousIndex else { return nil }
return viewControllerList[previousIndex]
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
guard let vcIndex = viewControllerList.firstIndex(of: viewController) else { return nil }
let nextIndex = vcIndex + 1
guard viewControllerList.count != nextIndex else { return nil }
guard viewControllerList.count > nextIndex else { return nil }
return viewControllerList[nextIndex]
}
}
Related
I have a UIPageViewController that let's me navigate between multiple view controller.
My app works swiping my screen, but I want to remove the swipe gesture to navigate between the pages for different buttons inside my views
This is the code that I'm using on with my page view cxontroller
class RootPageViewController: UIPageViewController,UIPageViewControllerDataSource {
lazy var viewControllerList: [UIViewController] = {
let storyBoard = UIStoryboard(name: "Main", bundle: nil)
let VC1 = storyBoard.instantiateViewController(withIdentifier: "orangeVC")
let VC2 = storyBoard.instantiateViewController(withIdentifier: "blueVC")
let VC3 = storyBoard.instantiateViewController(withIdentifier: "purpleVC")
return [VC1, VC2, VC3]
}()
override func viewDidLoad() {
super.viewDidLoad()
self.dataSource = self
if let firstViewController = viewControllerList.first {
self.setViewControllers([firstViewController], direction: .forward, animated: true, completion: nil)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
guard let vcIndex = viewControllerList.index(of: viewController) else {return nil}
let previousIndex = vcIndex-1
guard previousIndex >= 0 else {return nil}
guard viewControllerList.count > previousIndex else {return nil}
return viewControllerList[previousIndex]
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
guard let vcIndex = viewControllerList.index(of: viewController) else {return nil}
let nextIndex = vcIndex+1
guard viewControllerList.count != nextIndex else {return nil}
guard viewControllerList.count > nextIndex else {return nil}
return viewControllerList[nextIndex]
}
}
You only need this line inside the button action
self.setViewControllers([viewControllerList[indexHere]], direction: .forward, animated:false, completion: nil)
I am attempting to add a tutorial section to my application after the user logs in. When the app loads up, they will first come to a login screen and enter their credentials. Once they are verified, I want to segue to a UIPageViewController and show them two pages of instructions on how to use the application. However, all of my attempts at doing so have resulted in a black screen. Here is my current attempt:
import UIKit
class TutorialPageViewController: UIPageViewController {
var pages: [UIViewController] = []
override func viewDidLoad()
{
super.viewDidLoad()
self.dataSource = self
self.delegate = self
print("LOADING")
let firstView = storyboard?.instantiateViewController(withIdentifier: "TutorialPage1") as! TutorialPage1ViewController
let secondView = storyboard?.instantiateViewController(withIdentifier: "TutorialPage2") as! TutorialPage2ViewController
pages = [firstView, secondView]
let startingViewController = self.pages[0]
let viewControllers: [UIViewController] = [startingViewController]
self.setViewControllers(viewControllers, direction: UIPageViewControllerNavigationDirection.forward, animated: true, completion: {(done: Bool) in})
}
func viewControllerAtIndex(index:NSInteger) -> UIViewController {
return pages[index]
}
}
extension TutorialPageViewController: UIPageViewControllerDataSource
{
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
guard let viewControllerIndex = pages.index(of: viewController) else { return nil }
let previousIndex = viewControllerIndex - 1
guard previousIndex >= 0 else { return pages.last }
guard pages.count > previousIndex else { return nil }
return pages[previousIndex]
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController?
{
guard let viewControllerIndex = pages.index(of: viewController) else { return nil }
let nextIndex = viewControllerIndex + 1
guard nextIndex < pages.count else { return pages.first }
guard pages.count > nextIndex else { return nil }
return pages[nextIndex]
}
}
extension TutorialPageViewController: UIPageViewControllerDelegate { }
The print statement in my viewDidLoad method is not being called, so I don't understand what I am doing wrong. I have created a push segue to TutorialPageViewController from the login view controller, but nothing ever loads.
Any help is appreciated.
Try checking the sample Project at Below GitHub Repo :
Link - https://github.com/RockinGarg/Stack_PageVC.git
Contains two Different Ways to Access
1. Making use of Container View and PageVC as SubView
2. Using Segue
I've searched every question/answer I can find on here, but I can't figure out how to hide the status bar for all of the view controllers in my UIPageViewController. Here's the code from my UIPageViewController class:
class TipsVC: UIPageViewController, UIPageViewControllerDelegate {
lazy var VCArr: [UIViewController] = {
return [self.VCInstance(name: "T1"),
self.VCInstance(name: "T2"),
self.VCInstance(name: "T3")]
}()
private func VCInstance(name: String) -> UIViewController {
return UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: name)
}
override public func viewDidLoad() {
super.viewDidLoad()
//self.dataSource = self
self.delegate = self
if let OB1 = VCArr.first {
setViewControllers([OB1], direction: .forward, animated: true, completion: nil)
let pageController = UIPageControl.appearance()
pageController.pageIndicatorTintColor = UIColor(red:1.00, green:0.88, blue:0.92, alpha:1.0)
pageController.currentPageIndicatorTintColor = UIColor(red:1.00, green:0.25, blue:0.51, alpha:1.0)
}
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
for view in self.view.subviews {
if view is UIScrollView {
view.frame = UIScreen.main.bounds
} else if view is UIPageControl {
view.backgroundColor = UIColor.clear
}
}
}
public func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController?{
guard let viewControllerIndex = VCArr.index(of: viewController) else {
return nil
}
let previousIndex = viewControllerIndex - 1
guard previousIndex >= 0 else {
return VCArr.last
}
guard VCArr.count > previousIndex else {
return nil
}
return VCArr[previousIndex]
}
public func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController?{
guard let viewControllerIndex = VCArr.index(of: viewController) else {
return nil
}
let nextIndex = viewControllerIndex + 1
guard nextIndex < VCArr.count else {
return VCArr.first
}
guard VCArr.count > nextIndex else {
return nil
}
return VCArr[nextIndex]
}
public func presentationCount(for pageViewController: UIPageViewController) -> Int{
return VCArr.count
}
public func presentationIndex(for pageViewController: UIPageViewController) -> Int{
guard let OB1 = viewControllers?.first,
let OB1Index = VCArr.index(of: OB1) else {
return 0
}
return OB1Index
}
public func nextPageWithIndex(index: Int)
{
let nextVC = VCArr[index]
setViewControllers([nextVC], direction: .forward, animated: true, completion: nil)
}
}
and here's a code sample from one of my viewControllers:
class T1: UIViewController {
#IBOutlet var nextBtn: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(true)
UIApplication.shared.isStatusBarHidden = true
}
#IBAction func nextBtnDidPress(_ sender: Any) {
let next = self.parent as! TipsVC
next.nextPageWithIndex(index: 1)
}
}
I'm well aware of how to hide the status bar on regular view controllers, but I'm unable to get the same results when I'm using a UIPageViewController. What's going on?
To hide statusbar from particluar viewController you need to hide status bar in viewWillAppear and hide status bar in viewWillDisAppear
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
UIApplication.shared.isStatusBarHidden = true
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
UIApplication.shared.isStatusBarHidden = false
}
viewWillAppear will call before opening particular viewController and viewWillDisAppear call after dismiss particular viewController
if you face problem with UIPageViewController use UIViewController and embed UIPageViewController inside that for reference check below code
var pageContainer: UIPageViewController!
pageContainer = UIPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
pageContainer.delegate = self
pageContainer.dataSource = self
pageContainer.setViewControllers([getViewControllerAtIndex(index: 0)] as [UIViewController], direction: .forward, animated: false, completion: nil)
pageContainer.view.frame = CGRect(x: 0, y: 0, width: self.view.frame.width, height: self.view.frame.height)
self.view.addSubview(pageContainer.view)
Hope this will help you
I am using the UIPageViewController for an on boarding / tutorial screen, and my problem is as follows:
When the user is on the last page of the tutorial, i want a left swipe gesture not to try and swipe the page controller, but instead to perform a segue to the registration page. I threw a print statement into the viewDidLoad in the UIViewController for the last page of the tutorial, and it registers.
In that same viewDidLoad I create my gestures to perform the segue, but nothing happens. I even tried putting the performSegue inside of the viewDidLoad, but nothing happened. I have my segue connected to the UIPageViewController as well as my GrowController, and neither register. I'm at a loss!
This is the UIViewController for the last page of tutorial
class GrowController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
print("*********************************")
createGesture()
// performSegue(withIdentifier: "ShowRegister", sender: self)
}
func createGesture() {
let showReg = UISwipeGestureRecognizer(target: self, action: #selector(showRegister))
showReg.direction = .left
view.addGestureRecognizer(showReg)
}
func showRegister(gesture: UISwipeGestureRecognizer) {
performSegue(withIdentifier: "showRegister", sender: self)
}
}
This is the UIPageViewController that handles the tutorial logic
class TutorialViewController: UIPageViewController, UIPageViewControllerDelegate, UIPageViewControllerDataSource {
var viewControllerIndex: Int?
lazy var tutorialArray: [UIViewController] = {
return [self.tutorialInstance(name: "page1"), self.tutorialInstance(name: "page2"), self.tutorialInstance(name: "page3")]
}()
private func tutorialInstance(name: String?) -> UIViewController {
return UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: name!)
}
override func viewDidLoad() {
super.viewDidLoad()
if let image = UIImage(named: "export.png") {
view.backgroundColor = UIColor.init(patternImage: image)
} else {
print("Error")
}
self.dataSource = self
self.delegate = self
if let firstViewController = tutorialArray.first {
setViewControllers([firstViewController], direction: .forward, animated: false, completion: nil)
}
}
These are the delgate and datasource functions
// Page View Controller delegate functions
public func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
guard let viewControllerIndex = tutorialArray.index(of: viewController) else {
return nil
}
let previousIndex = viewControllerIndex - 1
guard previousIndex >= 0 else {
return nil
}
guard tutorialArray.count > previousIndex else {
performSegue(withIdentifier: "ShowRegister", sender: self) // Added this line just testng around, nothing happend here though.
return nil
}
return tutorialArray[previousIndex]
}
public func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
guard let viewControllerIndex = tutorialArray.index(of: viewController) else {
return nil
}
let nextIndex = viewControllerIndex + 1
guard nextIndex < tutorialArray.count else {
return nil
}
guard tutorialArray.count > nextIndex else {
return nil
}
return tutorialArray[nextIndex]
}
public func presentationCount(for pageViewController: UIPageViewController) -> Int {
return tutorialArray.count
}
public func presentationIndex(for pageViewController: UIPageViewController) -> Int {
guard let firstViewController = viewControllers?.first, let firstViewControllerIndex = tutorialArray.index(of: firstViewController) else {
return 0
}
return firstViewControllerIndex
}
Lots of code for what is probably a simple answer.
tl;dr - How can I make a swipe gesture perform a segue from a specific page of the UIPageViewController
There is a delegate method that you can implement pageViewController(_:willTransitionTo:) but I don't know that its worth the trouble. Maybe just put another view in front of it and put a swipe gesture recognizer view in that view and use the gesture recognized to manually change the page or segue to the new controller.
I have a Page view controller (see below), what i want to achieve is to go to the FirstVC from ThirdVC and only from that!! with a function or a button, can anyone help me?
Here you can see the code of my PageVC
import UIKit
class PageVC: UIPageViewController,UIPageViewControllerDataSource, UIPageViewControllerDelegate{
lazy var VCArr: [UIViewController] = {
return [self.VCInstance(name: "FirstVC"), self.VCInstance(name: "SecondVC"), self.VCInstance(name: "ThirdVC")]
}()
private func VCInstance(name: String) -> UIViewController {
return UIStoryboard(name: "Main", bundle:nil).instantiateViewController(withIdentifier: name)
}
override func viewDidLoad() {
super.viewDidLoad()
self.dataSource = self
self.delegate = self
if let firstVC = VCArr.first {
setViewControllers([firstVC], direction: .forward, animated: true, completion: nil)
}
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
for view in self.view.subviews {
if view is UIScrollView {
view.frame = UIScreen.main.bounds
} else if view is UIPageControl {
view.backgroundColor = UIColor.clear
}
}
}
public func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
guard let viewControllerIndex = VCArr.index(of: viewController) else {
return nil
}
let previousIndex = viewControllerIndex - 1
guard previousIndex >= 0 else{
return VCArr.last
}
guard VCArr.count > previousIndex else {
return nil
}
return VCArr[previousIndex]
}
public func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
guard let viewControllerIndex = VCArr.index(of: viewController) else {
return nil
}
let nextIndex = viewControllerIndex + 1
guard nextIndex < VCArr.count else{
return VCArr.first
}
guard VCArr.count > nextIndex else {
return nil
}
return VCArr[nextIndex]
}
public func presentationCount(for pageViewController: UIPageViewController) -> Int {
return VCArr.count
}
public func presentationIndex(for pageViewController: UIPageViewController) -> Int {
guard let firstViewController = viewControllers?.first, let firstViewControllerIndex = VCArr.index(of: firstViewController) else{
return 0
}
return firstViewControllerIndex
}
}
Ok i found a solution here:
How do I change the UIPageViewController from WITHIN one of the UIViewControllers that is part of the UIPageViewController?
Simply i added this function to PageVC:
func nextPageWithIndex(index: Int)
{
let nextWalkthroughVC = VCArr[index]
setViewControllers([nextWalkthroughVC], direction: .forward, animated: true, completion: nil)
}
Then in the ThirdVC view controller i added in my function:
let parent = self.parent as! PageVC
parent.nextPageWithIndex(index: 0)
Where 0 is the index of the view controller that i want to show
And works perfectly!