问题
Good afternoon, I'm running a query in Firebase and the info i get back i use it to run another query. The issue i'm having is displaying the data on the second CustomCell. I'm using the print statement and data is showing in the console. Segues are working as expected, TableViews are setup as datasource and delegate, IBOutlets are in place, Cell identifiers in Storyboard are in place too. i cannot find a solution for it, i'm not sure what i'm missing. Any help is greatly appreciated.
Cell with second query
class PatlistCell: UITableViewCell {
@IBOutlet weak var ptnameLbl: UILabel!
@IBOutlet weak var assignedmdLbl: UILabel!
@IBOutlet weak var officemdLbl: UILabel!
@IBOutlet weak var roomnumberLbl: UILabel!
@IBOutlet weak var seenoseeLbl: UILabel!
@IBOutlet weak var assigneddateLbl: UILabel!
@IBOutlet weak var ptdataBtn: UIButton!
var ptdatas = [PTData]()
var ptdatainfoRef: CollectionReference!
var delegate: MyCellDelegate?
var patDataQuery: Query!
override func awakeFromNib() {
super.awakeFromNib()
ptdatainfoRef = Firestore.firestore().collection(PTLIST_REF)
}
func configurePatListCell(ptlist: PTList) {
ptnameLbl.text = ptlist.ptname
assignedmdLbl.text = ptlist.assignedmd
officemdLbl.text = ptlist.officemd
roomnumberLbl.text = ptlist.room
seenoseeLbl.text = ptlist.seenosee
assigneddateLbl.text = ptlist.assigneddate
}
@IBAction func ptdataTapped(_ sender: Any) {
let patDataQuery = ptdatainfoRef.whereField("ptname",
isEqualTo: (ptnameLbl.text!))
.whereField("assignedmd", isEqualTo: (assignedmdLbl.text!))
.whereField("officemd", isEqualTo: (officemdLbl.text!))
.whereField("room", isEqualTo: (roomnumberLbl.text!))
.whereField("seenosee", isEqualTo: (seenoseeLbl.text!))
.whereField("assigneddate", isEqualTo:
(assigneddateLbl.text!))
patDataQuery.getDocuments { (snapshot, error) in
if let err = error {
debugPrint("error getting data: \(err)")
} else {
guard let snap = snapshot else { return }
for document in snap.documents {
let data = document.data()
let ptname = data[PTNAME] as? String ?? ""
let dob = data[DOB] as? String ?? ""
let fin = data[FIN] as? String ?? ""
let officemd = data[OFFICEMD] as? String ?? ""
let assignedmd = data[ASSIGNEDMD] as? String ?? ""
let assigneddate = data[ASSIGNEDDATE] as? String ??
""
let room = data[ROOM] as? String ?? ""
let diagnoses = data[DIAGNOSES] as? String ?? ""
let reasonforadmitorconsult =
data[REASONFORADMITORCONSULT] as? String ?? ""
let goalofhospitalization =
data[GOALOFHOSPITALIZATION] as? String ?? ""
let seenosee = data[SEENOSEE] as? String ?? ""
let notestocbo = data[NOTESTOCBO] as? String ?? ""
let comments = data[COMMENTS] as? String ?? ""
let hosp = data[HOSP] as? String ?? ""
let team = data[TEAM] as? String ?? ""
let newPtdata = PTData (ptname: ptname, dob: dob,
fin: fin, officemd: officemd, assignedmd: assignedmd, assigneddate:
assigneddate, room: room, diagnoses: diagnoses,
reasonforadmitorconsult: reasonforadmitorconsult,
goalofhospitalization: goalofhospitalization, seenosee: seenosee,
notestocbo: notestocbo, comments: comments, hosp: hosp, team: team)
self.ptdatas.append(newPtdata)
print(document.data())
}
}
self.delegate?.cellButtonPressed(self.ptdatas) //argument to pass the variable to the VC
}
}
}
ViewController
class ResultsdataVC: UIViewController {
@IBOutlet weak var resultsTableView: UITableView!
var ptlists = [PTList]()
var ptdatas = [PTData]()
override func viewDidLoad() {
super.viewDidLoad()
resultsTableView.delegate = self
resultsTableView.dataSource = self
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "gotoptinfo" {
let destVC = segue.destination as! PatdataVC
destVC.ptdatas = ptdatas
}
}
}
extension ResultsdataVC: UITableViewDataSource,
UITableViewDelegate, MyCellDelegate {
func tableView(_ tableView: UITableView, numberOfRowsInSection
section: Int) -> Int {
return ptlists.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath:
IndexPath) -> UITableViewCell {
if tableView == self.resultsTableView {
let cell = tableView.dequeueReusableCell(withIdentifier:
"PatlistCell", for: indexPath) as? PatlistCell
cell!.configurePatListCell(ptlist: ptlists[indexPath.row])
cell!.delegate = self
return cell!
}
return UITableViewCell()
}
func cellButtonPressed() {
self.ptdatas = ptdatas . //this allows the VC populate the local variable
performSegue(withIdentifier: "gotoptinfo", sender: self)
}
}
Second Cell
class PatdataCell: UITableViewCell {
@IBOutlet weak var ptnameLbl: UILabel!
@IBOutlet weak var dobLbl: UILabel!
@IBOutlet weak var finLbl: UILabel!
@IBOutlet weak var officemdLbl: UILabel!
@IBOutlet weak var assignedmdLbl: UILabel!
@IBOutlet weak var assigneddateLbl: UILabel!
@IBOutlet weak var roomnumberLbl: UILabel!
@IBOutlet weak var diagnosesLbl: UILabel!
@IBOutlet weak var reasonforadmitorconsultLbl: UILabel!
@IBOutlet weak var goalofhospitalizationLbl: UILabel!
@IBOutlet weak var seenoseeLbl: UILabel!
@IBOutlet weak var notestocboLbl: UILabel!
@IBOutlet weak var commentsLbl: UILabel!
@IBOutlet weak var hospitalLbl: UILabel!
@IBOutlet weak var teamLbl: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
}
func configurePatDataCell(ptdata: PTData) {
ptnameLbl.text = ptdata.ptname
dobLbl.text = ptdata.dob
finLbl.text = ptdata.fin
officemdLbl.text = ptdata.officemd
assignedmdLbl.text = ptdata.assignedmd
assigneddateLbl.text = ptdata.assigneddate
roomnumberLbl.text = ptdata.room
diagnosesLbl.text = ptdata.diagnoses
reasonforadmitorconsultLbl.text =
ptdata.reasonforadmitorconsult
goalofhospitalizationLbl.text = ptdata.goalofhospitalization
seenoseeLbl.text = ptdata.seenosee
notestocboLbl.text = ptdata.notestocbo
commentsLbl.text = ptdata.comments
hospitalLbl.text = ptdata.hosp
teamLbl.text = ptdata.team
}
}
Second ViewController
class PatdataVC: UIViewController, UITableViewDelegate,
UITableViewDataSource {
var ptdatas = [PTData]()
@IBOutlet weak var patDataTableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
patDataTableView.delegate = self
patDataTableView.dataSource = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection
section: Int) -> Int {
return ptdatas.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath:
IndexPath) -> UITableViewCell {
if tableView == patDataTableView {
let cell = tableView.dequeueReusableCell(withIdentifier:
"PatdataCell", for: indexPath) as? PatdataCell
cell!.configurePatDataCell(ptdata: ptdatas[indexPath.row])
return cell!
}
return UITableViewCell()
}
}
Cell Delegate
protocol MyCellDelegate {
func cellButtonPressed (_ ptdatas: [PTData])
}
回答1:
ptdatas exists in ResultsdataVC and in your PatlistCell. In your PatlistCell this data is appended, but the variable in the ResultsdataVC is not updated.
In prepare for segue your are setting the empty ptdatas list.
A solution would be to make your delegate conform to cellButtonPressed(ptdatas: [PTData]) and pass your generated array from the tableViewCell to your ResultsdataVC and update the ResultsdataVC PTData array before performing the segue.
来源：https://stackoverflow.com/questions/57317277/customcell-label-in-viewcontroller-not-displaying-data