ViewController 中的 CustomCell 标签不显示数据 [英] CustomCell label in ViewController not displaying data
本文介绍了ViewController 中的 CustomCell 标签不显示数据的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
下午好，我正在 Firebase 中运行查询，我返回的信息用于运行另一个查询.我遇到的问题是在第二个 CustomCell 上显示数据.我正在使用打印语句并且数据显示在控制台中.Segues 按预期工作，TableViews 设置为数据源和委托，IBOutlets 已就位，Storyboard 中的单元标识符也已就位.我找不到解决方案，我不确定我错过了什么.任何帮助是极大的赞赏.
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.
带有第二个查询的单元格
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
}
}
}
视图控制器
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)
}
}
第二个单元格
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
}
}
第二个视图控制器
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()
}
}
单元代表
protocol MyCellDelegate {
func cellButtonPressed (_ ptdatas: [PTData])
}
推荐答案
ptdatas 存在于 ResultsdataVC 和您的 PatlistCell 中.在您的 PatlistCell 中附加了此数据，但未更新 ResultsdataVC 中的变量.
ptdatas exists in ResultsdataVC and in your PatlistCell. In your PatlistCell this data is appended, but the variable in the ResultsdataVC is not updated.
在 prepare for segue 中，您正在设置空的 ptdatas 列表.
In prepare for segue your are setting the empty ptdatas list.
一个解决方案是让您的委托符合 cellButtonPressed(ptdatas: [PTData]) 并将您生成的数组从 tableViewCell 传递到您的 ResultsdataVC 并在执行 segue 之前更新 ResultsdataVC PTData 数组.
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.
这篇关于ViewController 中的 CustomCell 标签不显示数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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