Buttons to Social Media Apps not working - Swift [duplicate] - ios

Question

This question already has answers here:
Xcode - How to fix 'NSUnknownKeyException', reason: … this class is not key value coding-compliant for the key X" error?
(79 answers)
Closed 5 years ago.
I am currently making an app and I am using Swft 3 with Xcode 8.2 beta. I am trying to make it so that the user is able to access the social media from the SWRevealViewController in my iOS project. When the social media buttons are clicked they should open up the corresponding app. However, when the code is executed and the iOS simulator is opened, when I slide to open up the SWRevealViewController(the menu), the app crashes.
Full Error message:
*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<TheGunnOracleApp.SocialMedia 0x7ffd0d50c0d0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key dataSource.'
*** First throw call stack:
(
0 CoreFoundation 0x000000010212dd4b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x0000000101b8f21e objc_exception_throw + 48
2 CoreFoundation 0x000000010212dc99 -[NSException raise] + 9
3 Foundation 0x000000010169db3f -[NSObject(NSKeyValueCoding) setValue:forKey:] + 291
4 UIKit 0x0000000102e8e99f -[UIViewController setValue:forKey:] + 88
5 UIKit 0x0000000103102c6e -[UIRuntimeOutletConnection connect] + 109
6 CoreFoundation 0x00000001020d2b60 -[NSArray makeObjectsPerformSelector:] + 256
7 UIKit 0x00000001031015f2 -[UINib instantiateWithOwner:options:] + 1867
8 UIKit 0x0000000102e950d1 -[UIViewController _loadViewFromNibNamed:bundle:] + 386
9 UIKit 0x0000000102e959f3 -[UIViewController loadView] + 177
10 UIKit 0x000000010311561c -[UITableViewController loadView] + 84
11 UIKit 0x0000000102e95d28 -[UIViewController loadViewIfRequired] + 201
12 UIKit 0x0000000102e9657c -[UIViewController view] + 27
13 TheGunnOracleApp 0x00000001014d50fb -[SWRevealViewController _deployForViewController:inView:] + 235
14 TheGunnOracleApp 0x00000001014d4f58 -[SWRevealViewController _deploymentForViewController:inView:appear:disappear:] + 136
15 TheGunnOracleApp 0x00000001014d48c1 -[SWRevealViewController _rearViewDeploymentForNewFrontViewPosition:] + 433
16 TheGunnOracleApp 0x00000001014d32f2 -[SWRevealViewController _setFrontViewPosition:withDuration:] + 82
17 TheGunnOracleApp 0x00000001014d26c6 __65-[SWRevealViewController _dispatchSetFrontViewPosition:animated:]_block_invoke + 70
18 TheGunnOracleApp 0x00000001014d1300 -[SWRevealViewController _enqueueBlock:] + 160
19 TheGunnOracleApp 0x00000001014d261b -[SWRevealViewController _dispatchSetFrontViewPosition:animated:] + 251
20 TheGunnOracleApp 0x00000001014d0154 -[SWRevealViewController setFrontViewPosition:animated:] + 148
21 TheGunnOracleApp 0x00000001014cffed -[SWRevealViewController revealToggleAnimated:] + 93
22 TheGunnOracleApp 0x00000001014d05df -[SWRevealViewController revealToggle:] + 63
23 UIKit 0x0000000102cf645c -[UIApplication sendAction:to:from:forEvent:] + 83
24 UIKit 0x0000000103137971 -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 149
25 UIKit 0x0000000102cf645c -[UIApplication sendAction:to:from:forEvent:] + 83
26 UIKit 0x0000000102e7c344 -[UIControl sendAction:to:forEvent:] + 67
27 UIKit 0x0000000102e7c65d -[UIControl _sendActionsForEvents:withEvent:] + 444
28 UIKit 0x0000000102e7c7e7 -[UIControl _sendActionsForEvents:withEvent:] + 838
29 UIKit 0x0000000102e7b559 -[UIControl touchesEnded:withEvent:] + 668
30 UIKit 0x0000000102d63d5d -[UIWindow _sendTouchesForEvent:] + 2747
31 UIKit 0x0000000102d6544b -[UIWindow sendEvent:] + 4011
32 UIKit 0x0000000102d1254b -[UIApplication sendEvent:] + 371
33 UIKit 0x00000001034fda0f __dispatchPreprocessedEventFromEventQueue + 3248
34 UIKit 0x00000001034f6745 __handleEventQueue + 4879
35 CoreFoundation 0x00000001020d28e1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
36 CoreFoundation 0x00000001020b7b0c __CFRunLoopDoSources0 + 556
37 CoreFoundation 0x00000001020b6ff6 __CFRunLoopRun + 918
38 CoreFoundation 0x00000001020b6a04 CFRunLoopRunSpecific + 420
39 GraphicsServices 0x0000000107e37a6f GSEventRunModal + 161
40 UIKit 0x0000000102cf4808 UIApplicationMain + 159
41 TheGunnOracleApp 0x00000001014f2d0f main + 111
42 libdyld.dylib 0x0000000105ddd68d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
Here is the code for each button in the social media.
Note: I removed code for the rest of the social media because of Facebook not working at first:
import Foundation
import UIKit
class SocialMedia: UITableViewController{
#IBAction func facebookOpen(_ sender: Any) {
UIApplication.shared.open(NSURL(string: "https://www.facebook.com/gunnoracle")! as URL)
}
}
Here is a screenshot of what my Main.storyboard UITableViewController looks like:

Answer 1

Seems that the problem is not caused by that very line of code as I just tried it and it worked.
when I slide to open up the SWRevealViewController(the menu), the app crashes.
This is might be the cause. Something wrong with how you use SWRevealViewController.