Before the addition of 64bit in iOS it was possible to take an NSUInteger (or NSInteger) and put it into an int variable, like so: int arrayCount = [self.myArray count]; If you add 64bit support to your app you may notice a compiler warning when you do this: Implicit conversion loses integer precision: ‘NSInteger’ (aka […]
Since iOS 7 and OS X 10.9 the default journalling mode in SQLite Stores is WAL. In addition to the main store file you’ll find a WAL file with the same (or larger) size as the store file, and a less important SHM file. Prior to this implementation it was easy to save the context, […]
Sometimes Xcode gets confused with the intricacies of versioning. Frequently I find that I’m on a branch, everything is working fine, and for the life of me can’t merge it back into the Master branch. Often this happens because Xcode refuses NOT to make an change, such as update certain files I have already dealt […]
When you create a new .strings file in Xcode it will be encoded as Unicode UTF-8. That’s sufficient to hold all the special characters you can dream of. Some translation services such as ICanLocalize require .strings files to be submitted in UTF-16LE though. Puzzled about what this even means I found out that UTF-16LE can […]
When you create a new .strings file in Xcode it will be encoded as Unicode UTF-8. That’s sufficient to hold all the special characters you can dream of. Some translation services such as ICanLocalize require .strings files to be submitted in UTF-16LE though. Puzzled about what this even means I found out that UTF-16LE can […]
When you’re displaying a UIImage in your view controller it’s hardly noticeable how long it actually takes for the engine to “draw” the picture. Lenoard van Driel has tested this and confirms it takes 80ms – or in television terms, 2 frames. That’s something worth putting an audio delay in for. Drawing several images in […]
You can delete individual objects by using the NSManagedObjectContext method deleteObject, like so: [self.managedObjectContext deleteObject:yourManagedObject]; To delete all managed objects from your store, you can use a for-in loop: – (void)clearCoreData { NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@”YourEntity” inManagedObjectContext:self.managedObjectContext]; [fetchRequest setEntity:entity]; NSError *error = nil; NSArray *fetchedObjects = [self.managedObjectContext executeFetchRequest:fetchRequest […]
Add this statement to your app’s Run Scheme -com.apple.CoreData.SQLDebug 1 and your Log Console shall be populated with fascinating statements such as 2013-11-20 18:49:53.715 YourApp[6245:70b] CoreData: annotation: Connecting to sqlite database file at “/Users/versluis/Library/Application Support/iPhone Simulator/7.1-64/Applications/1FED9364-3039-4D47-967E-9B075CBE8277/Documents/PatchBay.sqlstore” 2013-11-20 18:49:53.717 YourApp[6245:70b] CoreData: sql: pragma journal_mode=wal 2013-11-20 18:49:53.718 YourApp[6245:70b] CoreData: sql: pragma cache_size=200 2013-11-20 18:49:53.719 YourApp[6245:70b] CoreData: sql: […]
