Core Data is great. But when you add it to an existing project Xcode throws some random error messages at you that make you doubt your sanity. Again. Legitimately copied and pasted code from Apple’s own templates generates totally useless errors such as Receiver type ‘NSManagedObjectContext’ for instance message is a forward declaration. This isn’t […]
Apple’s new A7 processors support 64bit under iOS 7 – but only if your app is specifically compiled for 64bit. Ideally you want to compile once and use 64bit if the architecture supports, and if not use 32bit for devices that have A4 – A6x processors. Since Xcode 5.0.2 you can do this, and here’s […]
Xcode 5 has more than a few annoying habits. One of them is that the status bar disappears when you run your app under iOS 6, if the option “Hide Status Bar during launch” is checked. On iOS 7 it correctly hides the status bar during launch, but under iOS 6 it’s gone for good. […]
If your class creates more than one UIAlertView, then you need a way to react to each of those accordingly. Problem is, you may only have one delegate that listens to all alerts at any given time. You could of course create a separate class for each alert view, but that’s a bit overkill. Instead, […]
This can happen when you try to run code built for iOS 7 Base SDK on Xcode 4.x, or if you compile against an older Base SDK in Xcode 5. The solution is to define what isn’t defined manually using a Macro. Add this to every class that’s complaining and you should be fine: #ifndef […]
The UIDevice class can help us do that like so: [super viewDidLoad]; // lets detect the height of our screen here int height = [UIScreen mainScreen].bounds.size.height; int width = [UIScreen mainScreen].bounds.size.width; // share the news NSString *message = [[NSString alloc]initWithFormat:@”This screen is \n\n%i pixels high and\n%i pixels wide”, height, width]; NSLog(@”%@”, message); This will work […]
If you create a new project in Xcode 5 you’ll notice that it won’t allow you to change the deployment target to anything less than 7.0. The drop down menu is there but it’s greyed out and shows no other values. You can type something in that field (for example 6.1), but when you do […]
No matter how hard I’ve tried to tweak my Storyboard, there are always areas that only look well on one particular version of iOS. There is no “one Storyboard fits all” approach. The easiest option is to have one Storyboard for iOS 6 and another for iOS 7 – then everybody’s happy. Question is, how […]
