Year: 2013

If Device A saves or changes a file in your app’s iCloud folder, Device B might want to know about this. So you’d imagine there should be an easy way to monitor those changes by way of a notification or a delegate. Sadly there isn’t. Like many things in Objective C, this is way more […]

Sometimes it can be difficult to find which of your own apps are installed on a device, especially when you’ve made so many over the years and also have installed countless ones from the app store. Here’s how to list “your apps” in Xcode 5: connect the device head over to Window – Organizer – […]

Sometimes this error pops up when running an app on an iOS device: Could not change executable permissions on the application. Usually this is caused by an app with a re-purposed Bundle Identifier. If you create a new app and use the same Bundle Identifier as a different app that is already installed, then Xcode […]

Sometimes iOS updates go awry. It may happen that the device hangs itself for good, refusing to activate or be recognised by iTunes. In that case, it’s time for a DFU reset, also known as Recovery Mode. Download an .ipsw file for your device from the Developer Centre (either a beta or the release version) […]

Today Xcode surprised me with an error message I hadn’t heard before: property’s synthesized getter follows Cocoa naming convention for returning ‘owned’ objects. At first I thought, “isn’t that a good thing?”, and after checking how I had defined a new property I was clueless why this was happening: @property (nonatomic, strong) Phrase *newPhrase; What […]

NSManagedObjects behave differently to NSObjects on many levels. If you’d like to add custom start-up behaviour in your NSManagedObjects, you’ll have noticed that overriding the standard init method isn’t working. Instead, we can use the awakeFromFetch method. This is called automatically when a managed object is retrieved from the Core Data stack: – (void)awakefrom { […]