App displays text with different characters swift - swift

Question

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";

Answer 1

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)