While running the demo project I am getting the exception.

[arunkumariitkgp]

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* setObjectForKey: object cannot be nil (key: 0)' * First throw call stack: ( 0 CoreFoundation 0x01e7c5e4 exceptionPreprocess + 180 1 libobjc.A.dylib 0x016a98b6 objc_exception_throw + 44 2 CoreFoundation 0x01f06578 -[NSDictionaryM setObject:forKey:] + 888 3 ABCalendarPickerDemo 0x0002520e -[UIMyButton setBackgroundImage:forState:] + 190 4 ABCalendarPickerDemo 0x00023442 81-[ABCalendarPickerDefaultStyleProvider calendarPicker:cellViewForTitle:andState:]_block_invoke + 2226 5 ABCalendarPickerDemo 0x00020554 -[ABViewPool giveExistingOrCreateNewWith:] + 660 6 ABCalendarPickerDemo 0x00022a89 -[ABCalendarPickerDefaultStyleProvider calendarPicker:cellViewForTitle:andState:] + 233 7 ABCalendarPickerDemo 0x0000db43 -[ABCalendarPicker updateButtonsForProvider:andState:] + 1107 8 ABCalendarPickerDemo 0x0001338c -[ABCalendarPicker changeStateTo:fromState:animation:canDiffuse:] + 5836 9 ABCalendarPickerDemo 0x00016cf9 -[ABCalendarPicker setState:animated:] + 601 10 ABCalendarPickerDemo 0x00016205 -[ABCalendarPicker initWithStyleProvider:weekdaysProvider:daysProvider:monthsProvider:yearsProvider:erasProvider:] + 1045 11 ABCalendarPickerDemo 0x0001655e -[ABCalendarPicker initWithDefaultProviders] + 382 12 ABCalendarPickerDemo 0x00016810 -[ABCalendarPicker initWithCoder:] + 176 13 UIKit 0x004b06f2 -[UIClassSwapper initWithCoder:] + 240 14 Foundation 0x010afd6a _decodeObjectBinary + 3498 15 Foundation 0x010aee55 _decodeObject + 340 16 Foundation 0x010aecf9 -[NSKeyedUnarchiver decodeObjectForKey:] + 181 17 UIKit 0x004b0288 -[UIRuntimeConnection initWithCoder:] + 191 18 Foundation 0x010afd6a _decodeObjectBinary + 3498 19 Foundation 0x010b1226 -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:] + 2204 20 Foundation 0x010b1495 -[NSArray(NSArray) initWithCoder:] + 255 21 Foundation 0x010afd6a _decodeObjectBinary + 3498 22 Foundation 0x010aee55 _decodeObject + 340 23 Foundation 0x010aecf9 -[NSKeyedUnarchiver decodeObjectForKey:] + 181 24 UIKit 0x004af702 -[UINib instantiateWithOwner:options:] + 1117 25 UIKit 0x00321c95 -[UIViewController _loadViewFromNibNamed:bundle:] + 280 26 UIKit 0x0032243d -[UIViewController loadView] + 302 27 UIKit 0x0032273e -[UIViewController loadViewIfRequired] + 78 28 UIKit 0x00322c44 -[UIViewController view] + 35 29 UIKit 0x0024b5ad -[UIWindow addRootViewControllerViewIfPossible] + 66 30 UIKit 0x0024b947 -[UIWindow _setHidden:forced:] + 312 31 UIKit 0x0024bbdd -[UIWindow _orderFrontWithoutMakingKey] + 49 32 UIKit 0x0025644a -[UIWindow makeKeyAndVisible] + 65 33 ABCalendarPickerDemo 0x00002adb -[ABAppDelegate application:didFinishLaunchingWithOptions:] + 683 34 UIKit 0x00208f65 -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 309 35 UIKit 0x002097a5 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1536 36 UIKit 0x0020dfb8 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 824 37 UIKit 0x0022242c -[UIApplication handleEvent:withNewEvent:] + 3447 38 UIKit 0x00222999 -[UIApplication sendEvent:] + 85 39 UIKit 0x0020fc35 _UIApplicationHandleEvent + 736 40 GraphicsServices 0x023fe2eb _PurpleEventCallback + 776 41 GraphicsServices 0x023fddf6 PurpleEventCallback + 46 42 CoreFoundation 0x01df7dd5 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION + 53 43 CoreFoundation 0x01df7b0b CFRunLoopDoSource1 + 523 44 CoreFoundation 0x01e227ec CFRunLoopRun + 2156 45 CoreFoundation 0x01e21b33 CFRunLoopRunSpecific + 467 46 CoreFoundation 0x01e2194b CFRunLoopRunInMode + 123 47 UIKit 0x0020d6ed -[UIApplication _run] + 840 48 UIKit 0x0020f94b UIApplicationMain + 1225 49 ABCalendarPickerDemo 0x000027f8 main + 168 50 ABCalendarPickerDemo 0x00002745 start + 53 ) libc++abi.dylib: terminating with uncaught exception of type NSException

I resolved this by checking whether the image object is nil or not.

• (void)setBackgroundImage:(UIImage *)image forState:(UIControlState)state { if (image) [self.backgroundImages setObject:image forKey:[NSNumber numberWithInt:state]]; if (self.state == state) [self setNeedsDisplay]; }

But I am not getting the proper calendar view. Please look the screenshot.

[k06a]

Looks like bundle with resources is not connected

[k06a]

I've updated example right now for iOS7 and Xcode5. Close this issue if your problem was solved.

[arunkumariitkgp]

Thanks for the quick reply. That is not the issue. I am still getting the same Exception.

[k06a]

Try now :) added one more commit