Hello, I have a strange problem with a project that I'm working on for iOS. I am working through the "Beginning iOS 5 Development" book from Apress. I'm on the seventh chapter, which deals with pickers (UIDatePicker, UIPickerView, etc...). I'm clearly doing something wrong, because when I try and boot the app, it crashes when it tries to load my nib. This is what I do, and it crashes:
-Create a nib view and accompanying controller, and place a DatePicker control on the view.
-If I run the app at this point, it runs fine, but I can't do anything since the DatePicker isn't connected to an outlet.
-If and when I connect my DatePicker to an outlet in my controller, the app crashes on boot. This is what Xcode spits out at me:
2012-07-09 13:00:52.352 Book 07 Pickers[132:707] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIViewController 0x148350> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key singlePicker.'
*** First throw call stack:
(0x3230888f 0x3435e259 0x323085c5 0x37bed323 0x37bece23 0x37bc6f09 0x322677d3 0x32268461 0x31fa70c3 0x31f153c7 0x31df2c59 0x31d68c17 0x31dc863d 0x31dc85db 0x31dc7f15 0x31e51455 0x322623fd 0x31d4ae07 0x31d4adc3 0x31e512d9 0x322623fd 0x31d4ae07 0x31d4adc3 0x31d4ada1 0x31d4ab11 0x31e51069 0x322623fd 0x31d4ae07 0x31d4adc3 0x31d4ada1 0x31d4ab11 0x31d4b449 0x31d4992b 0x31d49319 0x31d2f695 0x31d2ef3b 0x313b622b 0x322dc523 0x322dc4c5 0x322db313 0x3225e4a5 0x3225e36d 0x313b5439 0x31d5dcd5 0x7f513 0x7f4b8)
terminate called throwing an exception
What am I doing wrong? I followed the instructions in the book to the letter, and I'm getting a crash. Is there anything obvious that stands out here?
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