how to save the state of radio button? - swift

i am trying to save the state of my radio button but it doesn't working for me any idea how to do that? i am using userdefaults for that now
class WTSettingsVC: UIViewController {
#IBOutlet weak var checkBttn: DLRadioButton!
#IBOutlet weak var checkBttn2: DLRadioButton!
var switchON : Bool = false
var button : Bool = false
let defaults = UserDefaults.standard
override func viewDidLoad() {
super.viewDidLoad()
checkBttn.isSelected = UserDefaults.standard.bool(forKey: "issaved")
checkBttn2.isSelected = UserDefaults.standard.bool(forKey: "issaved")
}
override func viewWillAppear(_ animated: Bool) {
super .viewWillAppear(animated)
self.setCommonNavigationBar(title: "Settings", largeTitle: true, tranpernt: false, tint: WTConstant.LMColors.greenTheme, fontColor: .white)
checkBttn?.isEnabled = UserDefaults.standard.bool(forKey: "switchState")
checkBttn?.addTarget(self, action: #selector(bttnAction(_:)), for: .touchUpInside)
}
#IBAction func bttnAction(_ sender: DLRadioButton) {
if sender.tag == 1 {
sender.isEnabled = true
switchON = true
defaults.set(switchON, forKey: "switchON")
}else if sender.tag == 2{
sender.isEnabled = true
switchON = false
defaults.set(switchON, forKey: "switchON")
}
}
}
UserDefaults.standard.set(sender.isEnabled, forKey: "switchState")
UserDefaults.standard.synchronize()
}
}

Don't use the same key to store state of two buttons. And use same key for storing and retrieving the state of a button.
class WTSettingsVC: UIViewController {
#IBOutlet weak var checkBttn: DLRadioButton!
#IBOutlet weak var checkBttn2: DLRadioButton!
override func viewDidLoad() {
super.viewDidLoad()
checkBttn.isSelected = UserDefaults.standard.bool(forKey: "checkBttnSelected")
checkBttn2.isSelected = UserDefaults.standard.bool(forKey: "checkBttn2Selected")
checkBttn.addTarget(self, action: #selector(bttnAction(_:)), for: .touchUpInside)
checkBttn2.addTarget(self, action: #selector(bttnAction(_:)), for: .touchUpInside)
}
#IBAction func bttnAction(_ sender: DLRadioButton) {
if sender == checkBttn {
UserDefaults.standard.set(true, forKey: "checkBttnSelected")
UserDefaults.standard.set(false, forKey: "checkBttn2Selected")
}else if sender == checkBttn2 {
UserDefaults.standard.set(false, forKey: "checkBttnSelected")
UserDefaults.standard.set(true, forKey: "checkBttn2Selected")
}
}
}

It seems that your code is pretty obviously nested improperly. For example, the following code isn't actually executing in the bttnAction function:
UserDefaults.standard.set(sender.isEnabled, forKey: "switchState")
UserDefaults.standard.synchronize()
This code needs to be placed within the curly bracket above it. Try rewriting your code similarly to this:
class WTSettingsVC: UIViewController {
#IBOutlet weak var checkBttn: DLRadioButton!
#IBOutlet weak var checkBttn2: DLRadioButton!
var switchON : Bool = false
var button : Bool = false
let defaults = UserDefaults.standard
override func viewDidLoad() {
super.viewDidLoad()
checkBttn.isSelected = UserDefaults.standard.bool(forKey: "issaved")
checkBttn2.isSelected = UserDefaults.standard.bool(forKey: "issaved")
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.setCommonNavigationBar(title: "Settings", largeTitle: true, tranpernt: false, tint: WTConstant.LMColors.greenTheme, fontColor: .white)
checkBttn?.isEnabled = UserDefaults.standard.bool(forKey: "switchState")
checkBttn?.addTarget(self, action: #selector(bttnAction(_:)), for: .touchUpInside)
}
#IBAction func bttnAction(_ sender: DLRadioButton) {
if sender.tag == 1 {
sender.isEnabled = true
switchON = true
defaults.set(switchON, forKey: "switchON")
} else if sender.tag == 2 {
sender.isEnabled = true
switchON = false
defaults.set(switchON, forKey: "switchON")
}
UserDefaults.standard.set(sender.isEnabled, forKey: "switchState")
UserDefaults.standard.synchronize()
}
}
Because these lines of code were outside of the closing bracket for that function, the lines weren't actually included in any function and, thus, would never be called.

Related

swift. UserDefaults and UISwitch

I'm trying to get UserDefaults to work with a UISwitch, but the switch state is not saving when I force close the app and reopen it.
Update: Got it to work. The switch state will stay in either the "on" or "off" state even when the app is closed.
My code:
let defaults = UserDefaults.standard
#IBAction func switchAction(_ sender: UISwitch) {
defaults.set(true, forKey: "saveTrue")
defaults.set(false, forKey: "saveFalse")
if sender.isOn == false {
sender.setOn(defaults.bool(forKey: "saveFalse"), animated: true)
} else if sender.isOn == true {
sender.setOn(defaults.bool(forKey: "saveTrue"), animated: true)
}
}
ANSWER:;;;
let defaults = UserDefaults.standard
override func viewDidLoad() {
super.viewDidLoad()
if let switchValue = getSwitchValue(), switchValue {
switchOutlet.setOn(true, animated: true)
} else {
switchOutlet.setOn(false, animated: true)
}
}
#IBAction func Switch(_ sender: UISwitch) {
if sender.isOn == false {
setSwitchStatus(status: false)
sender.setOn(false, animated: true)
} else if sender.isOn == true {
setSwitchStatus(status: true)
sender.setOn(true, animated: true)
}
}
func setSwitchStatus(status: Bool?) {
if status != nil {
defaults.set(status, forKey: "save1")
}
}
func getSwitchValue() -> Bool? {
return defaults.bool(forKey: "save1")
}
I'm not sure this is what you're looking for but I'd do it like this:
let defaults = UserDefaults.standard
#IBOutlet mySwitch: UISwitch!
//or any other function that is called 'when the app is reopened'
override func viewDidAppear() {
self.mySwitch.setOn(defaults.bool(forKey: "switchDefaultsKey"), animated: true)
}
#IBAction func switchAction(_ sender: UISwitch) {
defaults.set(sender.isOn, forKey: "switchDefaultsKey")
}

App displays text with different characters swift

I am making a chat app. When i send my messages or receive from other user they end up being displayed like this. What might be the issue? It works alright but sometimes it just changes the way the texts are displayed. Am not sure what am missing in this. Can anyone take a look at it. Kindly. Thanks in advance
Below is my code
class ChatController: UIViewController,UITextViewDelegate,UITableViewDataSource,UITableViewDelegate,UIGestureRecognizerDelegate{
#IBOutlet weak var txtViewBottomConstraints: NSLayoutConstraint!
#IBOutlet weak var viewTextViewContainer: ViewCustom!
#IBOutlet weak var txtViewContainerHeightConstraints: NSLayoutConstraint!
#IBOutlet weak var txtViewHeightConstraints: NSLayoutConstraint!
#IBOutlet var lblUserName: UILabel!
#IBOutlet var userImg: UIImageView!
#IBOutlet weak var txtView: IQTextView!
#IBOutlet weak var tblViewChat: UITableView!
#IBOutlet weak var bottomViewBottomConstraints: NSLayoutConstraint!
#IBOutlet weak var btnSend: UIButton!
var grpId = String()
var getMessageTimer: Timer!
var scrollEnable : Bool = false
var imagePicker : UIImagePickerController? = nil
var imageData : Data?
var groupName = String()
var groupImage = String()
var isFromNotification = Bool()
var strId = String()
var objChatVM = ChatViewModel()
var getMessageId = String()
var userImage:URL? = nil
var userName = String()
override func viewDidLoad() {
super.viewDidLoad()
popWithSwipe()
txtView.autocorrectionType = .no
lblUserName.text = userName
/* if userImage != nil
{
userImg.kf.setImage(with:userImage)
}
else
{
userImg.image = UIImage(named: "user")
}*/
userImg.kf.setImage(with:userImage, completionHandler: {
(image, error, cacheType, imageUrl) in
if image != nil{
self.userImg.image = image
}
else{
self.userImg.image = #imageLiteral(resourceName: "user")
}
})
IQKeyboardManager.shared.enable = false
IQKeyboardManager.shared.enableAutoToolbar = false
tblViewChat.dataSource = self
tblViewChat.delegate = self
tblViewChat.estimatedRowHeight = 70.0
tblViewChat.rowHeight = UITableViewAutomaticDimension
txtView.delegate = self
// txtView.textContainerInset = UIEdgeInsets(top: 0, left: 2, bottom: 0, right: 2)
let tapGestuer = UITapGestureRecognizer(target: self, action: #selector(handleTap(sender:)))
view.addGestureRecognizer(tapGestuer)
tapGestuer.delegate = self
// Do any additional setup after loading the view.
}
override func viewWillAppear(_ animated: Bool) {
if getMessageTimer != nil{
getMessageTimer.invalidate()
}
getMessageTimer = Timer.scheduledTimer(timeInterval: 2, target: self, selector: #selector(getMessageApi), userInfo: nil, repeats: true)
IQKeyboardManager.shared.enable = false
IQKeyboardManager.shared.enableAutoToolbar = false
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow), name: NSNotification.Name.UIKeyboardDidShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
getMessageTimer.invalidate()
NotificationCenter.default.removeObserver(self)
}
// MARK:- Get messages from server
#objc func getMessageApi(){
objChatVM.getMessage(param:strId) {status in
if status{
self.tblViewChat.reloadData()
if(self.objChatVM.getNumberOfMessage() != 0){
self.tblViewChat.scrollToRow(at: IndexPath(item: self.objChatVM.getNumberOfMessage()-1, section: 0), at: .bottom, animated: false)
}
}
}
}
#objc func handleTap(sender: UITapGestureRecognizer) {
txtView.resignFirstResponder()
}
// Enable IQKEYBoard manager here for handle keyboard at other controller which has disabled in viewdidload or viewwillappear
override func viewDidDisappear(_ animated: Bool) {
IQKeyboardManager.shared.enable = true
IQKeyboardManager.shared.enableAutoToolbar = true
}
// MARK:- Gesutrue Delegate Methods
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return true
}
// Handle here tap on table view and inside cell for dismiss keyboard while tap outside on the screen
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
if (touch.view is SenderTblCell || touch.view is ReceiverTblCell ) {
return false
}
if (touch.view?.superview is SenderTblCell || touch.view?.superview is ReceiverTblCell) {
return false
}
if (touch.view?.superview?.superview is SenderTblCell || touch.view?.superview?.superview is ReceiverTblCell) {
return false
}
if (touch.view?.superview?.superview?.superview is SenderTblCell || touch.view?.superview?.superview?.superview is ReceiverTblCell) {
return false
}
if(touch.view?.superview?.isDescendant(of: SenderTblCell().contentView))! || (touch.view?.superview?.isDescendant(of: ReceiverTblCell().contentView))!{
return false
}
return true // handle the touch
}
// MARK:- KeyBoard will show
#objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
var safeArea = 0
if UIDevice().userInterfaceIdiom == .phone || UIDevice().userInterfaceIdiom == .pad{
switch UIScreen.main.nativeBounds.height {
case 2436:
bottomViewBottomConstraints.constant = -keyboardSize.height + 30
self.view.layoutIfNeeded()
default:
if #available(iOS 11.0, *) {
let window = UIApplication.shared.keyWindow
safeArea = Int(window?.safeAreaInsets.bottom ?? 0.0)
}
bottomViewBottomConstraints.constant = -keyboardSize.height + CGFloat(safeArea) - 10
self.view.layoutIfNeeded()
}
}
}
}
// MARK:- KeyBoard will hide
#objc func keyboardWillHide(notification: NSNotification) {
bottomViewBottomConstraints.constant = -30
self.view.layoutIfNeeded()
}
#IBAction func btnSendAction(_ sender: Any) {
let param = ["userId":strId,"message":txtView.text!]
objChatVM.sendMessage(param: param) { (status) in
self.txtView.text = ""
self.textViewDidChange(self.txtView)
}
}
//MARK:- TextView Delegate Methods
func textViewDidChange(_ textView: UITextView) {
if textView.text == ""{
//textView.translatesAutoresizingMaskIntoConstraints = true
// txtViewHeightConstraints.constant = 100.0
// btnSend.setImage(#imageLiteral(resourceName: "attachment"), for: .normal)
}else{
// btnSend.setImage(#imageLiteral(resourceName: "sendMsg"), for: .normal)
}
var frame : CGRect = textView.bounds
frame.size.height = textView.contentSize.height
print(frame)
if(frame.height >= 100.0){
textView.isScrollEnabled = true
}
else{
textView.isScrollEnabled = false
txtView.frame.size = frame.size
}
if textView.text == ""{
txtViewContainerHeightConstraints.constant = 50.0
txtViewBottomConstraints.constant = 5.0
txtView.updateConstraints()
viewTextViewContainer.updateConstraintsIfNeeded()
viewTextViewContainer.updateConstraints()
viewTextViewContainer.layoutIfNeeded()
self.view.layoutIfNeeded()
}
}
func textViewDidEndEditing(_ textView: UITextView) {
}
func textViewShouldEndEditing(_ textView: UITextView) -> Bool {
return true
}
// MARK:- TableView DataSource and Delegate Methods
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return objChatVM.getNumberOfMessage()
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let messageUserId = objChatVM.getMessageUserFromId(index: indexPath.row)
print(UserViewModel.Shared().getUserId())
if(messageUserId == UserViewModel.Shared().getUserId()){
let cell = tblViewChat.dequeueReusableCell(withIdentifier: "senderCell") as! SenderTblCell
cell.lblMessage.text = objChatVM.getMessage(index: indexPath.row)
cell.lblDate.text = objChatVM.getDateTime(index: indexPath.row)
return cell
}
let cell = tblViewChat.dequeueReusableCell(withIdentifier: "receiverCell") as! ReceiverTblCell
cell.lblMessage.text = objChatVM.getMessage(index: indexPath.row)
cell.lblDate.text = objChatVM.getDateTime(index: indexPath.row)
cell.lblName.text = objChatVM.getFullNameOfUserFrom(index: indexPath.row)
let url = URL(string:objChatVM.getUserFromImage(index:indexPath.row))
cell.imgView.kf.indicatorType = .activity
cell.imgView.kf.setImage(with:url)
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
txtView.resignFirstResponder()
}
// MARK: Side Menu Button Action
#IBAction func btnSideMenuActn(_ sender: UIButton) {
self.pushViewControl(ViewControl:"SideMenuController")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
This is how the message from my server in my logs looks like
message = "Am+good.+How+are+you+my+student%3F";
Use removingPercentEncoding and some of the text such as + doesn't seem to generated by urlEncoding if they are created by code then use both in combination:
message = "Am+good.+How+are+you+my+student%3F"
let decodedMessage = message.removingPercentEncoding?.replacingOccurrences(of: "+", with: " ")
print(decodedMessage)

Swift: Retrieve data from Firebase and display in table view

I am making an app which has a news feed of images (HomeViewController). The user can tap on each image which segues to the SiteViewController which has a table view of empty data and a button that when clicked segues to ContextSheetViewController where the user can upload data of the image that they clicked on in the news feed. The user then presses upload and this data (siteCodeTextView, areaCodeTextView, trenchTextView) is saved to firebase and it dismisses back to the SiteViewController. I then want to retrieve the data value of siteCodeTextView that has just been uploaded of the image in the table view of the SiteViewController. But when I press upload in the ContextSheetViewController the error: Unexpectedly found nil while unwrapping an Optional value occurs. And my sheetId is printing nil in SiteViewController so I am not sure how to retrieve it correctly? Any help?
Here is my storyboard of relevant view controllers:
Code for SiteViewController:
class SiteViewController: UIViewController {
#IBOutlet weak var tableView: UITableView!
var sheets = [Sheet]()
var users = [User]()
var sheetId: String!
var postId: String!
override func viewDidLoad() {
super.viewDidLoad()
tableView.dataSource = self
loadSheets()
print(postId)
print(sheetId)
}
func loadSheets() {
Api.Sheet.REF_SHEETS.child(self.postId!).observe(.childAdded, with: {
snapshot in
Api.Sheet.observeSheets(withSheetId: snapshot.key, completion: {
sheet in
// self.fetchUser(uid: sheet.uid!, completed: {
print("sheet id: \(sheet.id)")
print("sheet uid: \(sheet.uid)")
self.sheets.append(sheet)
self.tableView.reloadData()
// })
})
})
}
func fetchUser(uid: String, completed: #escaping () -> Void ) {
Api.User.observeUser(withId: uid, completion: {
user in
self.users.append(user)
completed()
})
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "SheetSegue" {
let sheetVC = segue.destination as! SheetViewController
let sheetId = sender as! String
sheetVC.sheetId = sheetId
}
}
}
extension SiteViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return sheets.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "SheetCell", for: indexPath) as! SiteTableViewCell
let sheet = sheets[indexPath.row]
print("sheet id: \(sheet.id)")
print("sheet uid: \(sheet.uid)")
// let user = users[indexPath.row]
// cell.user = user
cell.sheet = sheet
cell.delegate = self
return cell
}
}
extension SiteViewController: SiteTableViewCellDelegate {
func goToSheetVC(sheetId: String) {
performSegue(withIdentifier: "SheetSegue", sender: sheetId)
}
}
Code for ContextSheetViewController:
class ContextSheetViewController: UIViewController {
#IBOutlet weak var siteCodeTextView: UITextField!
#IBOutlet weak var areaCodeTextView: UITextField!
#IBOutlet weak var trenchTextView: UITextField!
#IBOutlet weak var uploadArtefactImage: UIImageView!
#IBOutlet weak var artefactImageView: UIImageView!
var selectedImage: UIImage?
var postId: String!
override func viewDidLoad() {
super.viewDidLoad()
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.handleSelectPhoto))
uploadArtefactImage.addGestureRecognizer(tapGesture)
uploadArtefactImage.isUserInteractionEnabled = true
}
#objc func handleSelectPhoto() {
let pickerController = UIImagePickerController()
pickerController.delegate = self
present(pickerController, animated: true, completion: nil)
}
#IBAction func uploadButton_TouchUpInside(_sender: Any) {
if let profileImg = self.artefactImageView.image, let imageData = UIImageJPEGRepresentation(profileImg, 0.1) {
let photoIdString = NSUUID().uuidString
print(photoIdString)
let storageRef = Storage.storage().reference(forURL: Config.STORAGE_ROOF_REF).child("sheets").child(photoIdString)
storageRef.putData(imageData, metadata: nil, completion: { (metadata, error) in
if error != nil {
ProgressHUD.showError(error!.localizedDescription)
return
}
let photoUrl = metadata?.downloadURL()?.absoluteString
self.sendDataToDatabase(photoUrl: photoUrl!)
})
} else {
ProgressHUD.showError("Sheet Image can not be empty!")
}
}
func sendDataToDatabase(photoUrl: String) {
// let ref = Database.database().reference()
let sheetsReference = Api.Sheet.REF_SHEETS
// let sheetsReference = ref.child("sheets")
let newSheetId = sheetsReference.childByAutoId().key
let newSheetReference = sheetsReference.child(newSheetId)
guard let currentUser = Auth.auth().currentUser else {
return
}
let currentUserId = currentUser.uid
newSheetReference.setValue(["uid": currentUserId, "photoUrl": photoUrl, "siteCodeTextView": siteCodeTextView.text!, "areaCodeTextView": areaCodeTextView.text!, "trenchTextView": trenchTextView.text!], withCompletionBlock: {
(error, ref) in
if error != nil {
ProgressHUD.showError(error!.localizedDescription)
return
}
let postSheetRef = Api.Sheet.REF_SHEETS.child(self.postId!).child(newSheetId)
// let postSheetRef = Api.Sheet.REF_SHEETS.child("post-sheets").child(self.postId).child(newSheetId)
postSheetRef.setValue(true, withCompletionBlock: { (error, ref) in
if error != nil {
ProgressHUD.showError(error!.localizedDescription)
return
}
})
ProgressHUD.showSuccess("Success")
self.clean()
self.navigationController?.popViewController(animated: true)
})
}
func clean() {
self.siteCodeTextView.text = ""
self.uploadArtefactImage.image = UIImage(named: "upload")
self.artefactImageView.image = UIImage(named: "image")
}
}
extension ContextSheetViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
print("did Finish Picking Media")
if let image = info["UIImagePickerControllerOriginalImage"] as? UIImage{
artefactImageView.image = image
// selectedImage = image
// uploadArtefactImage.image = image
}
dismiss(animated: true, completion: nil)
}
}
Code for SiteTableViewCell:
protocol SiteTableViewCellDelegate {
func goToSheetVC(sheetId: String)
}
class SiteTableViewCell: UITableViewCell {
#IBOutlet weak var profileImageView: UIImageView!
#IBOutlet weak var siteSheetLabel: UILabel!
#IBOutlet weak var nameLabel: UILabel!
var delegate: SiteTableViewCellDelegate?
var sheet: Sheet? {
didSet {
updateView()
}
}
var user: User? {
didSet {
setupUserInfo()
}
}
func updateView() {
siteSheetLabel.text = sheet?.siteCodeTextView
}
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
func setupUserInfo() {
nameLabel.text = user?.username
if let photoUrlString = user?.profileImageUrl {
let photoUrl = URL(string: photoUrlString)
profileImageView.sd_setImage(with: photoUrl, placeholderImage: UIImage(named: "placeholderImg"))
}
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.siteSheetLabel_TouchUpInside))
siteSheetLabel.addGestureRecognizer(tapGesture)
siteSheetLabel.isUserInteractionEnabled = true
}
#objc func siteSheetLabel_TouchUpInside() {
print(sheet?.id)
if let id = sheet?.id{
delegate?.goToSheetVC(sheetId: id)
}
}
override func prepareForReuse() {
super.prepareForReuse()
profileImageView.image = UIImage(named: "placeholderImg")
}
}
From what you have shown the culprit is the postId, you are using it to fetch data from Firebase and yet you haven't shown anywhere what its value is. When the user taps on an image, the postId is not transfered to the SiteViewController.
In the SiteViewController remove the ! and replace it with ?, put an initializer that will take the postID as a parameter.
var postId:String?
func initPost(forImage postId: String) {
self.postId=postId
}
In the previous news feed VC inside the segue or didSelectForRow(i don't know what you use for transition, initialize the SiteViewController, so when it is presented it knows which ID to retrieve data for.
Another thing that needs mentioning is that you are using observe but you are not removing the observers.
EDIT: this answer was based on me not knowing what your HomeVC looked like.
if segue.identifier == "SiteSegue" {
let siteVC = segue.destination as! SiteViewController
let postId = sender as! String
siteVC.postId = postId
}

update UIViewController in Real Time from Popover Viewcontroller in Swift 4

right now i'm experimenting with SceneKit DebugOptions.
i'm trying to update/ show Scenekits Debug Options in real time, using switch controllers from a Popover ViewController.
i've tried many things, like UserDefaults, Delegation and Protocols, but stil i wasn't able to see the result in real time, every time i have to kill the app en relaunch it to see the results.
so, i would be greatfull if someone would have an answer to my question :D
extension i added to my MainVC
extension ViewController: UIPopoverPresentationControllerDelegate, DebugOptions {
func wireFrameEnabled(enabled: Bool) {
if enabled == true {
print(enabled)
}
}
func showCameraEnabled(enabled: Bool) {
}
func showAllDebugOptions(enabled: Bool) {
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
guard let popoverController = segue.destination.popoverPresentationController, let button = sender as? UIButton else { return }
popoverController.delegate = self
popoverController.sourceRect = button.bounds
let debugMenuVC = popoverController.presentedViewController as! DebugMenuVC
debugMenuVC.delegate? = self
}
func adaptivePresentationStyle(for controller: UIPresentationController) -> UIModalPresentationStyle {
return .none
}
}
Protocol
protocol DebugOptions {
func wireFrameEnabled(enabled: Bool)
func showCameraEnabled(enabled: Bool)
func showAllDebugOptions(enabled: Bool)
}
DebugMenuVC
class DebugMenuVC: UIViewController {
#IBOutlet weak var bgView: UIView!
#IBOutlet weak var showWireFrameSwitch: UISwitch!
#IBOutlet weak var showCameraSwitch: UISwitch!
#IBOutlet weak var showAllSwitch: UISwitch!
var delegate: DebugOptions?
override func viewWillLayoutSubviews() {
preferredContentSize = CGSize(width: 150, height: 300)
}
override func viewDidLoad() {
super.viewDidLoad()
buttonCheck()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
}
#IBAction func aSwitchBtnWasPressed( _ sender: UISwitch ) {
if (sender.tag == 0) && (sender.isOn == true) {
userDefaults.set(true, forKey: SHOW_WIRE_FRAME)
delegate?.wireFrameEnabled(enabled: true)
} else if (sender.tag == 0) && (sender.isOn == false) {
userDefaults.set(false, forKey: SHOW_WIRE_FRAME)
delegate?.wireFrameEnabled(enabled: false)
}
}
func buttonCheck() {
if userDefaults.bool(forKey: SHOW_WIRE_FRAME) == true{
showWireFrameSwitch.isOn = true
} else {
showWireFrameSwitch.isOn = false
}
}
}
in debubMenuVC.delegate shouldn't be an optional. thats the reason the delegation method always failed :D
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
guard let popoverController = segue.destination.popoverPresentationController, let button = sender as? UIButton else { return }
popoverController.delegate = self
popoverController.sourceRect = button.bounds
let debugMenuVC = popoverController.presentedViewController as! DebugMenuVC
debugMenuVC.delegate? = self
}

How to pass the variable from a ViewController Class to other Struct?

I have no idea how to pass the data from the class to another struct. This is my ViewController.swift file. And I have another file called Meme.swift which is used to save the struct. I tried to put the struct in ViewController.swift file as well as Meme.swift file but I cannot access the value like topTextField.text and lowTextField.text and use them in the struct. Can anyone help me with this?
ViewController:
import UIKit
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, UITextFieldDelegate {
#IBOutlet weak var cameraButton: UIBarButtonItem!
#IBOutlet weak var bottomTextField: UITextField!
#IBOutlet weak var topTextField: UITextField!
#IBOutlet weak var imagePickerView: UIImageView!
#IBOutlet weak var imageView: UIImageView!
#IBOutlet weak var actionButton: UIBarButtonItem!
let bottomTextFieldDelegate = BottomTextFieldDelegate()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
topTextField.text = "TOP"
bottomTextField.text = "BOTTOM"
topTextField.delegate = self
bottomTextField.delegate = self.bottomTextFieldDelegate
}
func textFieldDidBeginEditing(_ textField: UITextField) {
topTextField.text = ""
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
self.view.endEditing(true)
textField.resignFirstResponder()
actionButton.isEnabled = true
return true
}
#IBAction func shareAction(_ sender: Any) {
let image = generateMemedImage()
let controller = UIActivityViewController(activityItems: [image as Any], applicationActivities: nil)
self.present(controller, animated: true, completion: nil)
controller.completionWithItemsHandler = {(activityType: UIActivityType?, completed:Bool, returnedItems:[Any]?, error: Error?) in
if !completed {
debugPrint("cancelled")
return
}else{
self.save()
self.dismiss(animated: true, completion: nil)
}
}
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
cameraButton.isEnabled = UIImagePickerController.isSourceTypeAvailable(.camera)
configureTextField(textField: topTextField)
configureTextField(textField: bottomTextField)
topTextField.textAlignment = .center
bottomTextField.textAlignment = .center
subscribeToKeyboardNotifications()
actionButton.isEnabled = false
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
unsubscribeFromKeyboardNotifications()
}
func configureTextField(textField: UITextField) {
textField.defaultTextAttributes = memeTextAttributes
}
func save() -> Meme {
// Create the meme
let memedImage = generateMemedImage()
let meme = Meme(topText: topTextField.text!, bottomText: bottomTextField.text!, originalImage: imageView.image!, memedImage: memedImage)
return meme
}
func generateMemedImage() -> UIImage {
// TODO: Hide toolbar and navbar
navigationController?.setToolbarHidden(true, animated: true)
self.navigationController?.isNavigationBarHidden = true
// Render view to an image
UIGraphicsBeginImageContext(self.view.frame.size)
view.drawHierarchy(in: self.view.frame, afterScreenUpdates: true)
let memedImage:UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
// TODO: Show toolbar and navbar
navigationController?.setToolbarHidden(false, animated: false)
self.navigationController?.isNavigationBarHidden = false
return memedImage
}
func keyboardWillShow(_ notification:Notification) {
view.frame.origin.y = 0 - getKeyboardHeight(notification)
}
func keyboardWillHide(_ notification:Notification) {
view.frame.origin.y = 0
}
func getKeyboardHeight(_ notification:Notification) -> CGFloat { //getting the height of keyboard and use it for func keyboardWillShow to relocate
//the keyboard using keyboardWillShow function
let userInfo = notification.userInfo
let keyboardSize = userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue // of CGRect
return keyboardSize.cgRectValue.height
}
func subscribeToKeyboardNotifications() { //setting up the obeserver to be notified when keyboard is shown or not, then execute keyboardWillShow function
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(_:)), name: .UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(_:)), name: .UIKeyboardWillHide, object: nil)
}
func unsubscribeFromKeyboardNotifications() { //unsubscribe the notification
NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillShow, object: nil)
NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillHide, object: nil)
}
//setting the arributes of the text
let memeTextAttributes:[String:Any] = [
NSStrokeColorAttributeName: UIColor.black,
NSForegroundColorAttributeName: UIColor.white,
NSFontAttributeName: UIFont(name: "HelveticaNeue-CondensedBlack", size: 40)!,
NSStrokeWidthAttributeName: 3,]
#IBAction func pickAnImageFromAlbum(_ sender: Any) {
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .photoLibrary
present(imagePicker, animated: true, completion: nil)
}
#IBAction func pickAnImageFromCamera(_ sender: Any) {
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = .camera
present(imagePicker, animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
imagePickerView.image = image
imagePickerView.contentMode = .scaleAspectFit
dismiss(animated: true, completion: nil)
}
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController){
dismiss(animated: true, completion: nil)
}
}
BottomFieldDelegate:
import Foundation
import UIKit
class BottomTextFieldDelegate: NSObject, UITextFieldDelegate {
func textFieldDidBeginEditing(_ textField: UITextField) {
textField.text = ""
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
let viewController = ViewController()
textField.resignFirstResponder()
viewController.view.endEditing(true)
let actionButton = viewController.actionButton
actionButton?.isEnabled = true
return true
}
}
First u need to move this function like save() and generateMemedImage() into your ViewController class and then you can access topTextField.text and lowTextField.text
Modify your struct like below, and do not put nsobject in struct
struct Meme {
var topText: String
var bottomText: String
var memedImage: UIImage
var originalImage: UIImage
init(topText: String, bottomText: String, originalImage: UIImage, memedImage: UIImage) {
self.topText = topText
self.bottomText = bottomText
self.originalImage = originalImage
self.memedImage = memedImage
}
}
Remove save() from Meme struct and put that code in your Viewcontroller file.
Modify your function which return Meme struct object.
func save() -> Meme {
// Create the meme
let meme = Meme(topText: topTextField.text!, bottomText: bottomTextField.text!, originalImage: imageView.image!, memedImage: memedImage)
return meme
}
And you can store in Array like below.
let array:[Meme] = []
array.append(save())