Myujth

I'm trying to load the names of my documents in Firestore and show them in my tableViewController. Everytime I try i get an error and I don't know where it's coming from. I've tried a lot of things and I can't seem to find the solution. The delegate methods are called before the info is loaded, but if I reload the tableView the app crashes. If you can help me, thanks! :)

class ViewController: UITableViewController 




var db:Firestore!
var docArray = [String]()




override func viewDidLoad() 
 super.viewDidLoad()

 navigationController?.navigationBar.prefersLargeTitles = true

 db = Firestore.firestore()
 loadData()

 DispatchQueue.main.async 
 self.tableView.reloadData()
 


func loadData()

 print("loaded")
 db.collection("Producten").getDocuments (snap, error) in

 for doc in (snap?.documents)! 
 self.docArray.append(doc.documentID)
 

 DispatchQueue.main.async 
 self.tableView.reloadData()
 
 



override func numberOfSections(in tableView: UITableView) -> Int 

 return 1


override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int 

 return docArray.count


override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 

 print(docArray)

 let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
 cell.textLabel?.text = docArray[indexPath.row]
 return cell

crash log:

2018-11-10 19:31:17.551261+0100 Den Hartog[57326:4767154] *** Assertion 
failure in [UITableView_dequeueReusableCellWithIdentifier:forIndexPath:usingPresentationValues:], 
/BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKitCore_Sim/UIKit- 
3698.93.8/UITableView.m:8054
2018-11-10 19:31:17.559180+0100 Den Hartog[57326:4767154] *** 
Terminating app due to uncaught exception 
'NSInternalInconsistencyException', reason: 'unable to dequeue a cell 
with identifier cell - must register a nib or a class for the 
identifier or connect a prototype cell in a storyboard'
*** First throw call stack:

0 CoreFoundation 0x000000010fce01bb __exceptionPreprocess + 331
1 libobjc.A.dylib 0x000000010f27e735 objc_exception_throw + 48
2 CoreFoundation 0x000000010fcdff42 +[NSException raise:format:arguments:] + 98
3 Foundation 0x000000010dfef877 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 194
4 UIKitCore 0x000000011335a5b1 -[UITableView _dequeueReusableCellWithIdentifier:forIndexPath:usingPresentationValues:] + 868
5 UIKitCore 0x000000011335a219 -[UITableView dequeueReusableCellWithIdentifier:forIndexPath:] + 91
6 Den Hartog 0x000000010d48b386 $S10Den_Hartog14ViewControllerC05tableC0_12cellForRowAtSo07UITableC4CellCSo0jC0C_10Foundation9IndexPathVtF + 422
7 Den Hartog 0x000000010d48b5ec $S10Den_Hartog14ViewControllerC05tableC0_12cellForRowAtSo07UITableC4CellCSo0jC0C_10Foundation9IndexPathVtFTo + 108
8 UIKitCore 0x000000011337566e -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 771
9 UIKitCore 0x0000000113375bfb -[UITableView _createPreparedCellForGlobalRow:willDisplay:] + 73
10 UIKitCore 0x000000011333cc36 -[UITableView _updateVisibleCellsNow:isRecursive:] + 2863
11 UIKitCore 0x000000011335d8ee -[UITableView layoutSubviews] + 165
12 UIKitCore 0x000000011361b795 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1441
13 QuartzCore 0x0000000114ba3b19 -[CALayer layoutSublayers] + 175
14 QuartzCore 0x0000000114ba89d3 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 395
15 QuartzCore 0x0000000114b217ca _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 342
16 QuartzCore 0x0000000114b5897e _ZN2CA11Transaction6commitEv + 576
17 QuartzCore 0x0000000114b596fa _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 76
18 CoreFoundation 0x000000010fc44c27 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
19 CoreFoundation 0x000000010fc3f0be __CFRunLoopDoObservers + 430
20 CoreFoundation 0x000000010fc3f751 __CFRunLoopRun + 1537
21 CoreFoundation 0x000000010fc3ee11 CFRunLoopRunSpecific + 625
22 GraphicsServices 0x00000001188c21dd GSEventRunModal + 62
23 UIKitCore 0x000000011313181d UIApplicationMain + 140
24 Den Hartog 0x000000010d48e7c7 main + 71
25 libdyld.dylib 0x0000000110d99575 start + 1
26 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type 
NSException
(lldb) 

UITableViewCell default identifier is "Cell", not "cell" and that's why your application is crashing when you are trying to reload tableView data.

Change this:

let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)

With this:

let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)