View disappears with delay swift - ios

Question

I have the navigationController with 2 UIViewControllers.
When I press "back button" view from secondViewController disappears with 1 second delay.
P.S. I use iCarousel pod for init the views in secondViewController.
See screenshots:
When I press "back" button from another:
FirstController after 1 second (view from second controller disappeared)
Update:
Second ViewController
class AppsController : UIViewController, iCarouselDataSource, iCarouselDelegate {
let xmlHelper = XmlHelper()
var apps = Apps(data:[App]())
var selectUrl = ""
var selectTitle = ""
var scrollIndex = 0
#IBOutlet var carousel: iCarousel!
override func viewDidLoad() {
super.viewDidLoad()
self.carousel.delegate = self
self.carousel.isPagingEnabled = true
DispatchQueue.main.async {
self.initApps()
}
}
func numberOfItems(in carousel: iCarousel) -> Int {
return apps.data.count
}
func carousel(_ carousel: iCarousel, viewForItemAt index: Int, reusing view: UIView?) -> UIView {
let appView: AppView = Bundle.main.loadNibNamed("appView",
owner: nil,
options: nil)?.first as! AppView!
appView.titleLabel?.text = apps.data[index].title
appView.descLabel?.text = apps.data[index].desc
appView.frame = CGRect(x:0, y:0, width:self.view.frame.width-30, height:carousel.frame.height-60)
appView.backgroundColor = UIColor.white
var shadowLayer: CAShapeLayer!
shadowLayer = CAShapeLayer()
shadowLayer.path = UIBezierPath(roundedRect: appView.bounds, cornerRadius: 0).cgPath
shadowLayer.fillColor = UIColor.white.cgColor
shadowLayer.shadowColor = UIColor.lightGray.cgColor
shadowLayer.shadowPath = shadowLayer.path
shadowLayer.shadowOffset = CGSize(width: 0.0, height: 0.0)
shadowLayer.shadowOpacity = 0.8
shadowLayer.shadowRadius = 2
appView.layer.insertSublayer(shadowLayer, at: 0)
appView.storeButton.addTarget(self, action: #selector(didTapApp), for: UIControlEvents.touchUpInside)
DispatchQueue.main.async {
appView.iconView?.sd_setImage(with: URL(string:self.apps.data[index].icon
), completed: { (image, error, cache, url) in
if error == nil {
appView.iconView.image = appView.iconView.image?.cropToBounds(image: image!, width: 30, height: 30)
}
})
}
return appView
}
func carousel(_ carousel: iCarousel, valueFor option: iCarouselOption, withDefault value: CGFloat) -> CGFloat {
if (option == .spacing) {
return value * 1.1
}
return value
}
func didTapApp() {
if self.apps.data.count != 0 {
UIApplication.shared.open(URL(string: "itms://itunes.apple.com/app/id" + self.apps.data[carousel.currentItemIndex].link)!, options: [:], completionHandler: nil)
}
}
func initApps() {
xmlHelper.getAnoutherApps { (apps) in
if apps != nil{
self.apps = apps!
self.carousel.reloadData()
}
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let backItem = UIBarButtonItem()
backItem.title = constants.back
navigationItem.backBarButtonItem = backItem
if segue.identifier == "toWeb" {
let vc = segue.destination as! WebController
vc.fileUrl = nil
vc.url = self.selectUrl
vc.title = self.selectTitle
self.tabBarController?.tabBar.isHidden = true
}
}
AppView (disappears with delay)
class AppView : UIView {
#IBOutlet var titleLabel : UILabel!
#IBOutlet var descLabel : UILabel!
#IBOutlet var iconView : UIImageView!
#IBOutlet var storeButton : UIButton!
}
First controller
class SettingsController : UITableViewController, MFMailComposeViewControllerDelegate {
var selectUrl : URL?
var selectTitle = ""
var selectStringUrl = ""
override func viewDidLoad() {
super.viewDidLoad()
self.initUI()
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 4
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
switch section {
case 0:
return 2
case 1:
return 1
case 2:
return 1
case 3:
return 3
default:
return 0
}
}
override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
switch section {
case 0:
return constants.info
case 1:
return constants.settings
case 2:
return constants.connect
case 3:
return constants.community
default:
return ""
}
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "settingsTitleCell")!
let itemSize = CGSize(width:30, height:30);
UIGraphicsBeginImageContextWithOptions(itemSize, false, UIScreen.main.scale);
let imageRect = CGRect(x:0.0, y:0.0, width:itemSize.width, height:itemSize.height);
cell.imageView?.image!.draw(in: imageRect)
cell.imageView?.image! = UIGraphicsGetImageFromCurrentImageContext()!;
UIGraphicsEndImageContext();
switch indexPath.section {
case 0:
let cell = tableView.dequeueReusableCell(withIdentifier: "settingsTitleCell")!
cell.textLabel?.text = constants.infoTitles[indexPath.row]
cell.detailTextLabel?.text = constants.infoDetail[indexPath.row]
cell.imageView?.image = cell.imageView?.image?.cropToBounds(image: constants.infoImages[indexPath.row], width: 30, height: 30)
return cell
case 1:
let cell = tableView.dequeueReusableCell(withIdentifier: "fontCell") as! FontCell
return cell
case 2:
let cell = tableView.dequeueReusableCell(withIdentifier: "settingsTitleCell")!
cell.textLabel?.text = constants.connectTitles[indexPath.row]
cell.imageView?.image = cell.imageView?.image?.cropToBounds(image: constants.connectImages[indexPath.row], width: 30, height: 30)
cell.detailTextLabel?.text = ""
return cell
case 3:
let cell = tableView.dequeueReusableCell(withIdentifier: "settingsTitleCell")!
cell.textLabel?.text = constants.communityTitles[indexPath.row]
cell.detailTextLabel?.text = constants.communityDetail[indexPath.row]
cell.imageView?.image = cell.imageView?.image?.cropToBounds(image: constants.communityImages[indexPath.row], width: 30, height: 30)
return cell
default:
return cell
}
}
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
if indexPath.section == 1 {
return 80
} else {
return 45
}
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
switch indexPath.section {
case 0:
if indexPath.row == 0 {
self.initWebView(url: Bundle.main.url(forResource: "caution", withExtension: "html"), stringUrl: nil, titlePage: constants.infoTitles[indexPath.row])
} else {
self.selectTitle = constants.infoTitles[indexPath.row]
self.performSegue(withIdentifier: "toApps", sender: self)
}
case 2:
self.sendMessage()
break;
case 3:
switch indexPath.row {
case 0:
self.initWebView(url: Bundle.main.url(forResource: "about", withExtension: "html"), stringUrl: nil, titlePage: constants.communityTitles[indexPath.row])
break;
case 1:
self.initWebView(url: nil, stringUrl: "https://vk.com/electronicengineer", titlePage: constants.communityTitles[indexPath.row])
case 2:
self.initWebView(url: nil, stringUrl: "https://fb.com", titlePage: constants.communityTitles[indexPath.row])
break;
default:
break;
}
default:
break;
}
}
func initUI() {
self.title = constants.settings
self.tableView.tableFooterView = UIView()
}
func initWebView(url:URL?, stringUrl:String?, titlePage:String) {
if stringUrl != nil {
self.selectStringUrl = stringUrl!
self.selectUrl = nil
} else {
self.selectUrl = url!
}
self.selectTitle = titlePage
self.performSegue(withIdentifier: "toWeb", sender: self)
}
func sendMessage() {
let mailComposeViewController = configuredMailComposeViewController()
if MFMailComposeViewController.canSendMail() {
self.present(mailComposeViewController, animated: true, completion: nil)
}
}
func configuredMailComposeViewController() -> MFMailComposeViewController {
let mailComposerVC = MFMailComposeViewController()
mailComposerVC.mailComposeDelegate = self
mailComposerVC.setToRecipients(["postboxapp#yandex.ru"])
mailComposerVC.setSubject("Электроник на Android")
mailComposerVC.setMessageBody("", isHTML: false)
return mailComposerVC
}
func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {
controller.dismiss(animated: true, completion: nil)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let backItem = UIBarButtonItem()
backItem.title = constants.back
navigationItem.backBarButtonItem = backItem
if segue.identifier == "toWeb" {
let vc = segue.destination as! WebController
vc.fileUrl = self.selectUrl
vc.url = self.selectStringUrl
vc.title = self.selectTitle
self.tabBarController?.tabBar.isHidden = true
}
if segue.identifier == "toApps" {
let vc = segue.destination as! AppsController
vc.title = self.selectTitle
self.tabBarController?.tabBar.isHidden = true
}
}
}

Answer 1

Problem solved:
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(true)
self.carousel.isHidden = true
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
self.carousel.isHidden = false
}

Answer 2

Hiding and unhiding is just a work-around to the actual problem.
As answered to a similar question, set yourCarousel.clipsToBounds = true