Objective C, Thread 1 Program Received Signal SIGABRT [duplicate]
问题 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? (68 answers) Closed 4 years ago . I am trying to compile and run a simple tutorial for an Objective C app using Interface Builder. I am using Xcode 4.0.2 and simulating on iOS (iPhone) 4.3 http://www.switchonthecode.com/tutorials/creating-your-first-iphone-application-with-interface-builder When I build the project, it builds alright