MKMapView unexpected crash issue - ios

Question

In viewDidLoad I have only 2 strings:
MKMapView *mapViewMy = [[MKMapView alloc]init];
[self.view addSubview:mapViewMy];
And the app crashed on "[self.view addSubview:mapViewMy]". I use iOS7. It crashes both on devices and simulators. When I use simulator I have crash report:
2013-11-06 13:34:15.948 MyBex JAPanel[36286:a0b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil'
*** First throw call stack:
(
0 CoreFoundation 0x0216c5e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x01eef8b6 objc_exception_throw + 44
2 CoreFoundation 0x0211ebcc -[__NSArrayM insertObject:atIndex:] + 844
3 CoreFoundation 0x0211e870 -[__NSArrayM addObject:] + 64
4 UIKit 0x01190b67 PushNextClassForSettingIMP + 358
5 UIKit 0x0118905e TaggingAppearanceObjectSetterIMP + 43
6 UIKit 0x00d6d8de -[UIViewController _setUpLayoutGuideConstraintIfNecessaryAtTop:] + 424
7 UIKit 0x00d6c1c3 -[UIViewController topLayoutGuide] + 140
8 MapKit 0x023d16a8 -[MKMapView updateLayoutGuides] + 82
9 MapKit 0x023d17e7 -[MKMapView didMoveToSuperview] + 68
10 UIKit 0x00cba636 __45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke + 472
11 UIKit 0x00cba388 -[UIView(Hierarchy) _postMovedFromSuperview:] + 260
12 UIKit 0x00cc54c1 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1847
13 UIKit 0x00cb89b1 -[UIView(Hierarchy) addSubview:] + 56
14 UIKit 0x01189077 TaggingAppearanceObjectSetterIMP + 68
15 MyBex JAPanel 0x0001180e -[MapViewController configureView] + 142
16 MyBex JAPanel 0x00011778 -[MapViewController viewDidLoad] + 88
17 UIKit 0x00d71318 -[UIViewController loadViewIfRequired] + 696
18 UIKit 0x00d96b15 -[UINavigationController _layoutViewController:] + 39
19 UIKit 0x00d9702b -[UINavigationController _updateScrollViewFromViewController:toViewController:] + 235
20 UIKit 0x00d97123 -[UINavigationController _startTransition:fromViewController:toViewController:] + 78
21 UIKit 0x00d9809c -[UINavigationController _startDeferredTransitionIfNeeded:] + 645
22 UIKit 0x00d98cb9 -[UINavigationController __viewWillLayoutSubviews] + 57
23 UIKit 0x00ed2181 -[UILayoutContainerView layoutSubviews] + 213
24 UIKit 0x00cc8267 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 355
25 libobjc.A.dylib 0x01f0181f -[NSObject performSelector:withObject:] + 70
26 QuartzCore 0x005c82ea -[CALayer layoutSublayers] + 148
27 QuartzCore 0x005bc0d4 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
28 QuartzCore 0x005bbf40 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 26
29 QuartzCore 0x00523ae6 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 294
30 QuartzCore 0x00524e71 _ZN2CA11Transaction6commitEv + 393
31 QuartzCore 0x005e1430 +[CATransaction flush] + 52
32 UIKit 0x00c79dc9 _afterCACommitHandler + 131
33 CoreFoundation 0x021344ce __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
34 CoreFoundation 0x0213441f __CFRunLoopDoObservers + 399
35 CoreFoundation 0x02112344 __CFRunLoopRun + 1076
36 CoreFoundation 0x02111ac3 CFRunLoopRunSpecific + 467
37 CoreFoundation 0x021118db CFRunLoopRunInMode + 123
38 GraphicsServices 0x027f29e2 GSEventRunModal + 192
39 GraphicsServices 0x027f2809 GSEventRun + 104
40 UIKit 0x00c5dd3b UIApplicationMain + 1225
41 MyBex JAPanel 0x0003bc0d main + 141
42 libdyld.dylib 0x03423725 start + 0
43 ??? 0x00000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
I checked, both mapViewMy and self.view are not nil.

Answer 1

Its seems like in our viewDidLoad your object is miss referencing
Make sure you have added Framework of MapKit
Import Map Kit & Delegate in your .h file
Try this code :
MKMapView *mapViewMy = [[MKMapView alloc] initWithFrame:self.view.bounds];
mapViewMy.delegate=self;
[self.view addSubview:mapViewMy];
You need to add map kit delegates methods. :)

Answer 2

in .h file
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
//import MKMapkit framwork
#interface mapSampleViewController : UIViewController {
<MKMapViewDelegate>//mapview delegate
{
MKMapView *mapView;
}
in .m file
add this code in viewdidload
mapView= [[MKMapView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
mapView.delegate = self;
[self.view addSubview:mapView];