I commit my Pods directory. I don’t agree that the Pods directory is a build artefact. In fact I’d say it most definitely isn’t. It’s part of your application source: it won’t build without it! It’s easier to think of CocoaPods as a developer tool rather than a build tool. It doesn’t build your project, … Read more
Here are some useful macros around NSLog I use a lot: #ifdef DEBUG # define DLog(fmt, …) NSLog((@”%s [Line %d] ” fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__) #else # define DLog(…) #endif // ALog always displays output regardless of the DEBUG setting #define ALog(fmt, …) NSLog((@”%s [Line %d] ” fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__) The DLog macro is … Read more
The solutions provided will actually return the current region of the device – not the currently selected language. These are often one and the same. However, if I am in North America and I set my language to Japanese, my region will still be English (United States). In order to retrieve the currently selected language, … Read more
It’s a new feature called Modules or “semantic import”. There’s more info in the WWDC 2013 videos for Session 205 and 404. It’s kind of a better implementation of the pre-compiled headers. You can use modules with any of the system frameworks in iOS 7 and Mavericks. Modules are a packaging together of the framework … Read more
iPad Multitasking support requires all the orientations but your app does not, so you need to opt out of it, just add the UIRequiresFullScreen key to your Xcode project’s Info.plist file and apply the Boolean value YES.
In Xcode 4.x press ⌥⌘R (or click Menubar > Product > Scheme > Edit Scheme) select the “Diagnostics” tab and click “Enable Zombie Objects”: This turns released objects into NSZombie instances that print console warnings when used again. This is a debugging aid that increases memory use (no object is really released) but improves error … Read more
Like most of the other answers have said, instance methods use an instance of a class, whereas a class method can be used with just the class name. In Objective-C they are defined thusly: @interface MyClass : NSObject + (void)aClassMethod; – (void)anInstanceMethod; @end They could then be used like so: [MyClass aClassMethod]; MyClass *object = … Read more
objectForKey will return nil if a key doesn’t exist.
The generally-preferred code for 10.5+/iOS. for (id object in array) { // do something with object } This construct is used to enumerate objects in a collection which conforms to the NSFastEnumeration protocol. This approach has a speed advantage because it stores pointers to several objects (obtained via a single method call) in a buffer … Read more
The code for percent sign in NSString format is %%. This is also true for NSLog() and printf() formats.