Crash Fatal Exception: NSInternalInconsistencyException UITableView dataSource is not set

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Created Feb ’21

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Fatal Exception: NSInternalInconsistencyException
0 CoreFoundation 0x1a0b40300 __exceptionPreprocess
1 libobjc.A.dylib 0x1a0854c1c objc_exception_throw
2 CoreFoundation 0x1a0a3d1f8 +[_CFXNotificationTokenRegistration keyCallbacks]
3 Foundation 0x1a0e81998 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:]
4 UIKitCore 0x1a4e8ae64 -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:]
5 UIKitCore 0x1a4e57cc8 -[UITableView _updateVisibleCellsNow:]
6 UIKitCore 0x1a4e74fe0 -[UITableView layoutSubviews]
7 UIKitCore 0x1a515b284 -[UIView(CALayerDelegate) layoutSublayersOfLayer:]
8 QuartzCore 0x1a77aa718 -[CALayer layoutSublayers]
9 QuartzCore 0x1a77aab58 CA::Layer::layout_if_needed(CA::Transaction*)
10 QuartzCore 0x1a77bd03c CA::Layer::layout_and_display_if_needed(CA::Transaction*)
11 QuartzCore 0x1a770195c CA::Context::commit_transaction(CA::Transaction*, double)
12 QuartzCore 0x1a772c4bc CA::Transaction::commit()
13 QuartzCore 0x1a772d0b4 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*)
14 CoreFoundation 0x1a0abaee8 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__
15 CoreFoundation 0x1a0ab5b78 __CFRunLoopDoObservers
16 CoreFoundation 0x1a0ab6018 __CFRunLoopRun
17 CoreFoundation 0x1a0ab58f4 CFRunLoopRunSpecific
18 GraphicsServices 0x1aaecc604 GSEventRunModal
19 UIKitCore 0x1a4c89358 UIApplicationMain
20 Maytag 0x102438c98 main + 16 (AdrsStepperView.swift:16)
21 libdyld.dylib 0x1a09312dc start

Getting this log on crash, not able to figure out what is going wrong over here.

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Answer 1

Claude31 OP

Feb ’21

That would help to show the code and how you defined the datasource for the tableView.

That should be done:

either because the class is defined as UITableViewController
or because you defined the dataSource delegate in Interface Builder
or with a declaration in the viewDidLoad of the controller

myTable.datasource = self
In this case, you need to have the ViewController to conform to UITableViewDataSource, UITableViewDelegate

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