Question

I’ve been mucking around with MonoTouch and the Xcode interface builder from some sample code which had an interface defined already.

After adding a button and giving it a click callback I found one of the buttons was no longer responding to clicks and instead crashing out:

2011-09-30 01:51:35.361 RedLaserSample[19437:707]
-[RLSampleViewController scanPressed]: unrecognized selector sent to
instance 0x17e1260 MonoTouch.Foundation.MonoTouchException:
Objective-C exception thrown. Name: NSInvalidArgumentException
Reason: -[RLSampleViewController scanPressed]: unrecognized selector
sent to instance 0x17e1260 at MonoTouch.UIKit.UIApplication.Main
(System.String[] args, System.String principalClassName, System.String
delegateClassName) [0x00000] in :0 at
RedLaserSample.Application.Main (System.String[] args) [0x00000] in
/Users/dev/Desktop/chrisbranson-RedLaserSample-0311fa6/RedLaserSample/Main.cs:28

Any ideas what could be causing this and how I could fix it?

Answer 1

Solved it, for some reason I had to re-add the click event in the Xcode builder.. perhaps the project being built with an older version of mono broke itself when a newer way of adding button callbacks was added in?