setValue:forUndefinedKey:]: this class is not key value coding-compliant for the
Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIViewController 0x6b61880> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key datePicker.'
只要一运行就爆这个错,下面是代码
http://files.cnblogs.com/itgiant/Pickers.zip