ios - uipageviewcontroller

¿Cómo crear una vista de desplazamiento con un control de página usando swift?

Question

Estoy intentando crear un controlador de vista de página con números de vista. Quiero una muestra de código simple que usará UIPageViewController .

Answer 1

En Swift 3.0 craeate iboutlets a través de storyboard para scrollview y pagecontroller.

@IBOutlet weak var imgScrollView: UIScrollView!
@IBOutlet weak var imgPageController: UIPageControl!
var sliderImagesArray = NSMutableArray()

en el método viewdidload escribe este código

sliderImagesArray = ["https://images.unsplash.com/photo-1432679963831-2dab49187847?w=1080","https://images.unsplash.com/photo-1447746249824-4be4e1b76d66?w=1080", "https://images.unsplash.com/photo-1463595373836-6e0b0a8ee322?w=1080"]
imgScrollView.delegate = self
for i in 0..<sliderImagesArray.count {
var imageView : UIImageView
let xOrigin = self.imgScrollView.frame.size.width * CGFloat(i)
imageView = UIImageView(frame: CGRect(x: xOrigin, y: 0, width: self.imgScrollView.frame.size.width, height: self.imgScrollView.frame.size.height))
imageView.isUserInteractionEnabled = true
let urlStr = sliderImagesArray.object(at: i)
print(imgScrollView,imageView, urlStr)
imageView.sd_setImage(with: URL(string: urlStr as! String), placeholderImage: UIImage(named: "placeholder.png"))
imageView .contentMode = UIViewContentMode.scaleToFill
self.imgScrollView.addSubview(imageView)
}
self.imgScrollView.isPagingEnabled = true
self.imgScrollView.bounces = false
self.imgScrollView.showsVerticalScrollIndicator = false
self.imgScrollView.showsHorizontalScrollIndicator = false
self.imgScrollView.contentSize = CGSize(width:
self.imgScrollView.frame.size.width * CGFloat(sliderImagesArray.count), height: self.imgScrollView.frame.size.height)
imgPageController.addTarget(self, action: #selector(self.changePage(sender:)), for: UIControlEvents.valueChanged)
self.imgPageController.numberOfPages = sliderImagesArray.count
self.imgPageController.currentPage = 0
self.imgPageController.tintColor = UIColor.red
self.imgPageController.pageIndicatorTintColor = UIColor.black
self.imgPageController.currentPageIndicatorTintColor = UIColor.blue

después de eso implementar métodos delegados scrollview

func changePage(sender: AnyObject) -> () {
let x = CGFloat(imgPageController.currentPage) * imgScrollView.frame.size.width
imgScrollView.setContentOffset(CGPoint(x: x,y :0), animated: true)
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
let pageNumber = round(imgScrollView.contentOffset.x / imgScrollView.frame.size.width)
imgPageController.currentPage = Int(pageNumber)
}

Answer 2

Para el codificador perezoso, esta es la implementación de Swift 3 basada en la respuesta de That Lazy iOS Guy 웃 .

import UIKit
class ViewController: UIViewController,UIScrollViewDelegate {
let scrollView = UIScrollView(frame: CGRect(x: 0, y: 0, width: 320, height: 300))
var colors:[UIColor] = [UIColor.red, UIColor.blue, UIColor.green, UIColor.yellow]
var frame: CGRect = CGRect(x: 0, y: 0, width: 0, height: 0)
var pageControl : UIPageControl = UIPageControl(frame:CGRect(x: 50, y: 300, width: 200, height: 50))
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
configurePageControl()
scrollView.delegate = self
self.view.addSubview(scrollView)
for index in 0..<4 {
frame.origin.x = self.scrollView.frame.size.width * CGFloat(index)
frame.size = self.scrollView.frame.size
let subView = UIView(frame: frame)
subView.backgroundColor = colors[index]
self.scrollView .addSubview(subView)
}
self.scrollView.isPagingEnabled = true
self.scrollView.contentSize = CGSize(width: self.scrollView.frame.size.width * 4, height: self.scrollView.frame.size.height)
pageControl.addTarget(self, action: #selector(self.changePage(sender:)), for: UIControlEvents.valueChanged)
}
func configurePageControl() {
// The total number of pages that are available is based on how many available colors we have.
self.pageControl.numberOfPages = colors.count
self.pageControl.currentPage = 0
self.pageControl.tintColor = UIColor.red
self.pageControl.pageIndicatorTintColor = UIColor.black
self.pageControl.currentPageIndicatorTintColor = UIColor.green
self.view.addSubview(pageControl)
}
// MARK : TO CHANGE WHILE CLICKING ON PAGE CONTROL
func changePage(sender: AnyObject) -> () {
let x = CGFloat(pageControl.currentPage) * scrollView.frame.size.width
scrollView.setContentOffset(CGPoint(x: x,y :0), animated: true)
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
let pageNumber = round(scrollView.contentOffset.x / scrollView.frame.size.width)
pageControl.currentPage = Int(pageNumber)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}

Answer 3

Swift 3 - desplazamiento horizontal de la imagen

import UIKit
class pageenabled: UIViewController,UIScrollViewDelegate
{
let imagelist = ["img1.jpg", "photo1.jpg", "photo3.jpg", "photo4.jpg", "photo5.jpg"]
var scrollView = UIScrollView()
var pageControl : UIPageControl = UIPageControl(frame:CGRect(x: 50, y: 300, width: 200, height: 50))
var yPosition:CGFloat = 0
var scrollViewContentSize:CGFloat=0;
override func viewDidLoad() {
super.viewDidLoad()
scrollView = UIScrollView(frame: CGRect(x: 0, y: 0, width: self.view.frame.width, height: 300))
configurePageControl()
scrollView.delegate = self
self.view.addSubview(scrollView)
for i in stride(from: 0, to: imagelist.count, by: 1) {
var frame = CGRect.zero
frame.origin.x = self.scrollView.frame.size.width * CGFloat(i)
frame.origin.y = 0
frame.size = self.scrollView.frame.size
self.scrollView.isPagingEnabled = true
let myImage:UIImage = UIImage(named: imagelist[i])!
let myImageView:UIImageView = UIImageView()
myImageView.image = myImage
myImageView.contentMode = UIViewContentMode.scaleAspectFit
myImageView.frame = frame
scrollView.addSubview(myImageView)
}
self.scrollView.contentSize = CGSize(width: self.scrollView.frame.size.width * CGFloat(imagelist.count), height: self.scrollView.frame.size.height)
pageControl.addTarget(self, action: Selector(("changePage:")), for: UIControlEvents.valueChanged)
// Do any additional setup after loading the view.
}
func configurePageControl() {
// The total number of pages that are available is based on how many available colors we have.
self.pageControl.numberOfPages = imagelist.count
self.pageControl.currentPage = 0
self.pageControl.tintColor = UIColor.red
self.pageControl.pageIndicatorTintColor = UIColor.black
self.pageControl.currentPageIndicatorTintColor = UIColor.green
self.view.addSubview(pageControl)
}
// MARK : TO CHANGE WHILE CLICKING ON PAGE CONTROL
func changePage(sender: AnyObject) -> () {
let x = CGFloat(pageControl.currentPage) * scrollView.frame.size.width
scrollView.setContentOffset(CGPoint(x: x,y :0), animated: true)
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
let pageNumber = round(scrollView.contentOffset.x / scrollView.frame.size.width)
pageControl.currentPage = Int(pageNumber)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}

Answer 4

 @IBOutlet weak var scrollView: UIScrollView!
@IBOutlet weak var imageViewBottomConstraint: NSLayoutConstraint!
@IBOutlet weak var imageViewLeadingConstraint: NSLayoutConstraint!
@IBOutlet weak var imageViewTopConstraint: NSLayoutConstraint!
@IBOutlet weak var imageViewTrailingConstraint: NSLayoutConstraint!
extension ZoomedPhotoViewController: UIScrollViewDelegate {
func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? {
return imageView
}
}
private func updateMinZoomScaleForSize(size: CGSize) {
let widthScale = size.width / imageView.bounds.width
let heightScale = size.height / imageView.bounds.height
let minScale = min(widthScale, heightScale)
scrollView.minimumZoomScale = minScale
scrollView.zoomScale = minScale
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
updateMinZoomScaleForSize(view.bounds.size)
}
private func updateConstraintsForSize(size: CGSize) {
let yOffset = max(0, (size.height - imageView.frame.height) / 2)
imageViewTopConstraint.constant = yOffset
imageViewBottomConstraint.constant = yOffset
let xOffset = max(0, (size.width - imageView.frame.width) / 2)
imageViewLeadingConstraint.constant = xOffset
imageViewTrailingConstraint.constant = xOffset
view.layoutIfNeeded()
}
func scrollViewDidZoom(scrollView: UIScrollView) {
updateConstraintsForSize(view.bounds.size)
}
import UIKit
public class PhotoCommentViewController: UIViewController {
@IBOutlet weak var imageView: UIImageView!
@IBOutlet weak var scrollView: UIScrollView!
@IBOutlet weak var nameTextField: UITextField!
public var photoName: String!
override public func viewDidLoad() {
super.viewDidLoad()
if let photoName = photoName {
self.imageView.image = UIImage(named: photoName)
}
}
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if let cell = sender as? UICollectionViewCell,
indexPath = collectionView?.indexPathForCell(cell),
photoCommentViewController = segue.destinationViewController as? PhotoCommentViewController {
photoCommentViewController.photoName = "photo/(indexPath.row + 1)"
}
}
NSNotificationCenter.defaultCenter().addObserver(
self,
selector: #selector(PhotoCommentViewController.keyboardWillShow(_:)),
name: UIKeyboardWillShowNotification,
object: nil
)
NSNotificationCenter.defaultCenter().addObserver(
self,
selector: #selector(PhotoCommentViewController.keyboardWillHide(_:)),
name: UIKeyboardWillHideNotification,
object: nil
)
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
func adjustInsetForKeyboardShow(show: Bool, notification: NSNotification) {
guard let value = notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue else { return }
let keyboardFrame = value.CGRectValue()
let adjustmentHeight = (CGRectGetHeight(keyboardFrame) + 20) * (show ? 1 : -1)
scrollView.contentInset.bottom += adjustmentHeight
scrollView.scrollIndicatorInsets.bottom += adjustmentHeight
}
func keyboardWillShow(notification: NSNotification) {
adjustInsetForKeyboardShow(true, notification: notification)
}
func keyboardWillHide(notification: NSNotification) {
adjustInsetForKeyboardShow(false, notification: notification)
}
@IBAction func hideKeyboard(sender: AnyObject) {
nameTextField.endEditing(true)
}
public var photoIndex: Int!
import UIKit
class ManagePageViewController: UIPageViewController {
var photos = ["photo1", "photo2", "photo3", "photo4", "photo5"]
var currentIndex: Int!
override func viewDidLoad() {
super.viewDidLoad()
dataSource = self
// 1
if let viewController = viewPhotoCommentController(currentIndex ?? 0) {
let viewControllers = [viewController]
// 2
setViewControllers(
viewControllers,
direction: .Forward,
animated: false,
completion: nil
)
}
}
func viewPhotoCommentController(index: Int) -> PhotoCommentViewController? {
if let storyboard = storyboard,
page = storyboard.instantiateViewControllerWithIdentifier("PhotoCommentViewController")
as? PhotoCommentViewController {
page.photoName = photos[index]
page.photoIndex = index
return page
}
return nil
}
}

Answer 5

import UIKit
class DummyVC: UIViewController, UIScrollViewDelegate {
let scrollView = UIScrollView(frame: CGRect(x:0, y:0, width:320,height: 300))
var colors:[UIColor] = [UIColor.red, UIColor.blue, UIColor.green, UIColor.yellow]
var frame: CGRect = CGRect(x:0, y:0, width:0, height:0)
var pageControl : UIPageControl = UIPageControl(frame: CGRect(x:50,y: 300, width:200, height:50))
override func viewDidLoad() {
super.viewDidLoad()
configurePageControl()
scrollView.delegate = self
scrollView.isPagingEnabled = true
self.view.addSubview(scrollView)
for index in 0..<4 {
frame.origin.x = self.scrollView.frame.size.width * CGFloat(index)
frame.size = self.scrollView.frame.size
let subView = UIView(frame: frame)
subView.backgroundColor = colors[index]
self.scrollView .addSubview(subView)
}
self.scrollView.contentSize = CGSize(width:self.scrollView.frame.size.width * 4,height: self.scrollView.frame.size.height)
pageControl.addTarget(self, action: #selector(self.changePage(sender:)), for: UIControlEvents.valueChanged)
}
func configurePageControl() {
// The total number of pages that are available is based on how many available colors we have.
self.pageControl.numberOfPages = colors.count
self.pageControl.currentPage = 0
self.pageControl.tintColor = UIColor.red
self.pageControl.pageIndicatorTintColor = UIColor.black
self.pageControl.currentPageIndicatorTintColor = UIColor.green
self.view.addSubview(pageControl)
}
// MARK : TO CHANGE WHILE CLICKING ON PAGE CONTROL
func changePage(sender: AnyObject) -> () {
let x = CGFloat(pageControl.currentPage) * scrollView.frame.size.width
scrollView.setContentOffset(CGPoint(x:x, y:0), animated: true)
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
let pageNumber = round(scrollView.contentOffset.x / scrollView.frame.size.width)
pageControl.currentPage = Int(pageNumber)
}
}