Tom Tom - 3 months ago 32
iOS Question

How to push a JSQMessagesViewController correctly

I have a Swift project and am trying to use JSQMessagesViewController within it. I have used cocoapods to install the framework and am importing it using a swift import statement.

import JSQMessagesViewController


Up to this point there are no errors and everything compiles without warning. However when I try to push a new instance onto a navigation controller the app crashes.

func openConversation(userId: Int) {
let messageViewController = JSQMessagesViewController();
self.navigationController?.pushViewController(messageViewController, animated: true)
}


The second line of the method causes the crash and the error message is.

2015-08-03 21:44:17.229 [4856:64097] *** Assertion failure in -[JSQMessagesViewController viewWillAppear:], /[my file path]/Pods/JSQMessagesViewController/JSQMessagesViewController/Controllers/JSQMessagesViewController.m:223
2015-08-03 21:44:17.232 [4856:64097] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: self.senderId != nil'
*** First throw call stack:
(
0 CoreFoundation 0x00000001067e3c65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000108590bb7 objc_exception_throw + 45
2 CoreFoundation 0x00000001067e3aca +[NSException raise:format:arguments:] + 106
3 Foundation 0x0000000106ec298f -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 195
4 JSQMessagesViewController 0x00000001060e9055 -[JSQMessagesViewController viewWillAppear:] + 277
5 UIKit 0x00000001073f8f61 -[UIViewController _setViewAppearState:isAnimating:] + 487
6 UIKit 0x000000010741a355 -[UINavigationController _startCustomTransition:] + 887
7 UIKit 0x000000010742637f -[UINavigationController _startDeferredTransitionIfNeeded:] + 386
8 UIKit 0x0000000107426ece -[UINavigationController __viewWillLayoutSubviews] + 43
9 UIKit 0x00000001075716d5 -[UILayoutContainerView layoutSubviews] + 202
10 UIKit 0x00000001073449eb -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 536
11 QuartzCore 0x0000000108f5ded2 -[CALayer layoutSublayers] + 146
12 QuartzCore 0x0000000108f526e6 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
13 QuartzCore 0x0000000108f52556 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
14 QuartzCore 0x0000000108ebe86e _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 242
15 QuartzCore 0x0000000108ebfa22 _ZN2CA11Transaction6commitEv + 462
16 QuartzCore 0x0000000108ec00d3 _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 89
17 CoreFoundation 0x0000000106716ca7 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
18 CoreFoundation 0x0000000106716c00 __CFRunLoopDoObservers + 368
19 CoreFoundation 0x000000010670ca33 __CFRunLoopRun + 1123
20 CoreFoundation 0x000000010670c366 CFRunLoopRunSpecific + 470
21 GraphicsServices 0x000000010b148a3e GSEventRunModal + 161
22 UIKit 0x00000001072c48c0 UIApplicationMain + 1282
23 Startana 0x0000000105fa2807 main + 135
24 libdyld.dylib 0x0000000109306145 start + 1
25 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException


After searching online I cant seem to find any information about what causes this issue.

Answer

I’m glad to hear it solved your issue!

The JSQMessagesViewController have two asset parameters, the senderId and the senderDisplayName. So you must set your senderId and display name.

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