New Way to Override NSManagedObject Properties

There is a new, yet not very well-known way to override NSManagedObject properties without needing to manually call KVO methods willChangeValueForKey etc. This is achieved using dynamic accessors prefixed with managedObjectOriginal as follows: Department.h @interface Department : NSManagedObject @property (nullable, nonatomic, copy) NSString *name; @end Department.m @interface Department (DynamicAccessors) – (NSString Read more…

Common Init for a UIViewController Subclass

When creating a UIViewController subclass, e.g. in a framework, which you require to support being created from both storyboards and code, it is useful to implement initialisation which works for both. That can be achieved with a common init routine as follows: – (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{ self = [super Read more…

Revisiting Hackintosh

Like many others I’ve been unhappy with the lack of Mac hardware lately so thought I’d revisit the world of osx86 after many years. There seems to be many more people involved in the scene now including some excellent how-to Youtube videos even by some high profile Mac blogs and Read more…

Modern way to register NSUserDefaults

Here is a modern way to register user defaults. It uses dispatch_once to ensure the registration only happens once and performs it lazily on the first access. Keeps your defaults all on the one place. Also it is implemented as a global block in the class. NSInteger (^countBeforeAlerting)(void) = ^NSInteger(void) Read more…

Where to find IOKit headers for iOS

Sometimes when compiling more sophisticated iOS projects you need the IOKit headers which were removed from the iOS SDK a few versions ago. A simple workaround is to copy them from the Mac OS SDK to the iOS SDK with these commands: sudo cp -r /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/IOKit.framework/Versions/A/Headers /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/IOKit.framework Sometimes you also need OSTypes.h from Read more…

Default behaviour of UISplitViewController collapseSecondaryViewController

The documentation for UISplitViewControllerDelegate collapseSecondaryViewController says: When you return NO, the split view controller calls the collapseSecondaryViewController:forSplitViewController: method of the primary view controller, giving it a chance to do something with the secondary view controller’s content. Most view controllers do nothing by default but the UINavigationControllerclass responds by pushing the secondary view controller onto its navigation stack. Read more…