Followed tutorial exactly, UITableView will not work

Question

I am attempting to learn how to use the UITableView element, however despite watching a simple tutorial and copying the code character for character, the table view still crashes the application despite not raising any errors in the editor.

Code:

import UIKit

class viewFriendsViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

@IBOutlet weak var tableView: UITableView!
var dataSource: [String] = []

var items = ["one", "two"]

override func viewDidLoad() {
    super.viewDidLoad()
    dataSource = ["new orleans", "San Fransisco", "Seattle", "New York", "London"]
}
override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return dataSource.count
}

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell: UITableViewCell = tableView.dequeueReusableCellWithIdentifier("homeCell", forIndexPath: indexPath)
    cell.textLabel?.text = dataSource[indexPath.row]
    return cell
}

}

Error:

2015-11-05 13:51:49.120 collaboration[17405:218899] * Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key myTableView.' * First throw call stack: ( 0 CoreFoundation 0x000000010ac16f45 exceptionPreprocess + 165 1 libobjc.A.dylib
0x000000010c93adeb objc_exception_throw + 48 2 CoreFoundation
0x000000010ac16b89 -[NSException raise] + 9 3 Foundation
0x000000010afdfa6b -[NSObject(NSKeyValueCoding) setValue:forKey:] + 288 4 UIKit 0x000000010b5be04c -[UIViewController setValue:forKey:] + 88 5 UIKit 0x000000010b7eba71 -[UIRuntimeOutletConnection connect] + 109 6
CoreFoundation 0x000000010ab57a80 -[NSArray makeObjectsPerformSelector:] + 224 7 UIKit
0x000000010b7ea454 -[UINib instantiateWithOwner:options:] + 1864 8
UIKit 0x000000010b5c4c16 -[UIViewController _loadViewFromNibNamed:bundle:] + 381 9 UIKit 0x000000010b5c5542 -[UIViewController loadView] + 178 10 UIKit
0x000000010b5c58a0 -[UIViewController loadViewIfRequired] + 138 11 UIKit 0x000000010b5c6013 -[UIViewController view] + 27 12 UIKit 0x000000010bd687e7 -[_UIFullscreenPresentationController _setPresentedViewController:] + 87 13 UIKit 0x000000010b595dde -[UIPresentationController initWithPresentedViewController:presentingViewController:] + 133 14 UIKit 0x000000010b5d89ba -[UIViewController _presentViewController:withAnimationController:completion:] + 4004 15 UIKit 0x000000010b5dbc5c -[UIViewController _performCoordinatedPresentOrDismiss:animated:] + 489 16 UIKit 0x000000010b5db76b -[UIViewController presentViewController:animated:completion:] + 179 17 UIKit 0x000000010b5e0e0f -[UIViewController _showViewController:withAction:sender:] + 280 18 UIKit 0x000000010ba2b130 __66-[UIStoryboardShowSegueTemplate newDefaultPerformHandlerForSegue:]_block_invoke + 147 19 UIKit
0x000000010bb527c4 -[UIStoryboardSegueTemplate _performWithDestinationViewController:sender:] + 460 20 UIKit 0x000000010bb525c7 -[UIStoryboardSegueTemplate _perform:] + 82 21 UIKit 0x000000010bb5288b -[UIStoryboardSegueTemplate perform:] + 156 22 UIKit 0x000000010b434e91 -[UIApplication sendAction:to:from:forEvent:] + 92 23 UIKit 0x000000010b5a04d8 -[UIControl sendAction:to:forEvent:] + 67 24 UIKit 0x000000010b5a07a4 -[UIControl _sendActionsForEvents:withEvent:] + 311 25 UIKit 0x000000010b59f8d4 -[UIControl touchesEnded:withEvent:] + 601 26 UIKit 0x000000010b4a2ed1 -[UIWindow _sendTouchesForEvent:] + 835 27 UIKit 0x000000010b4a3c06 -[UIWindow sendEvent:] + 865 28 UIKit
0x000000010b4532fa -[UIApplication sendEvent:] + 263 29 UIKit
0x000000010b42dabf _UIApplicationHandleEventQueue + 6844 30 CoreFoundation 0x000000010ab43011 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17 31 CoreFoundation 0x000000010ab38f3c __CFRunLoopDoSources0 + 556 32 CoreFoundation 0x000000010ab383f3 __CFRunLoopRun + 867 33 CoreFoundation
0x000000010ab37e08 CFRunLoopRunSpecific + 488 34 GraphicsServices
0x000000010f20aad2 GSEventRunModal + 161 35 UIKit
0x000000010b43330d UIApplicationMain + 171 36 collaboration
0x000000010aa22f6d main + 109 37 libdyld.dylib
0x000000010d44292d start + 1 38 ???
0x0000000000000001 0x0 + 1 ) libc++abi.dylib: terminating with uncaught exception of type NSException (lldb)

Thanks

Did you do something in storyboard with your ViewController, add UITableView and custom cells? — Alexey Pichukov
Somthing in your code is trying to access myTableView. Which does not exist. Did you maybe rename the table view property? — joern
@Nick, Check datasource and delgate connection of your tableview and add below code in your viewdidload() : Your_tableName.dataSorce=self;Your_tableName.delegate=self; — Manikandan D

Ishika Ishika · Accepted Answer · 2016-08-03T18:32:45

Go to storyboard, right click on your tableView and check whether it's outlet is connected to name "myTableView" or not. If yes, then disconnect it using the cross icon. I guess your tableView is having two outlets, one named "myTableView" and other "tableView". Make sure you keep the name the one in your code.

Followed tutorial exactly, UITableView will not work

2 Answers