It cannot be done using public API's.
In IOS 5.1, you can do as follows using undocumented private API's. This is not recommended by apple and cannot be shipped to app store.
Copy paste the below contents into RadioPreferences.h
@protocol RadiosPreferencesDelegate
-(void)airplaneModeChanged;
@end
@interface RadiosPreferences : NSObject
{
struct __SCPreferences *_prefs;
int _applySkipCount;
id <RadiosPreferencesDelegate> _delegate;
BOOL _isCachedAirplaneModeValid;
BOOL _cachedAirplaneMode;
BOOL notifyForExternalChangeOnly;
}
- (id)init;
- (void)dealloc;
@property(nonatomic) BOOL airplaneMode;
- (void)refresh;
- (void)initializeSCPrefs:(id)arg1;
- (void)notifyTarget:(unsigned int)arg1;
- (void)synchronize;
- (void *)getValueForKey:(id)arg1;
- (void)setValue:(void *)arg1 forKey:(id)arg2;
@property(nonatomic) BOOL notifyForExternalChangeOnly; // @synthesize notifyForExternalChangeOnly;
@property(nonatomic) id <RadiosPreferencesDelegate> delegate; // @synthesize delegate=_delegate;
@end
Then try as below.
id rp = [[RadiosPreferences alloc] init];
BOOL status = [rp airplaneMode];
return status;