Upgraded to Xcode 9 and now app crashes

Question

spartan220 OP

Created Oct ’17

Replies 2

Boosts 0

Participants 3

When I select a UIBarButton to go to the next screen, the app crashes on:

class AppDelegate: UIResponder, UIApplicationDelegate {

with the error:

2017-10-07 18:22:12.033188-0400 AppName[3285:927126] -[tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x131e5df80

2017-10-07 18:22:12.034135-0400 AppName[3285:927126] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x131e5df80'

Everything was working fine before the xcode update and change to Swift 4. Any suggestions on what is causing this for me?

Boost

Answer 1

codeslubber OP

Nov ’17

Crickets?? how can selectors stll crash? super frustrating..

0

Answer 2

QuinceyMorris OP

Nov ’17

There isn't enough information here even to guess at the reason. The correct way to approach this is to set an Obj-C exception breakpoint in Xcode, and to look at the call stack at the point of the error.

The "unrecognized selector" message suggests that the object at 0x131e5df80 isn't a table view data source. That is something that could be investigated when the exception breakpoint is hit.

0