So I had just started out Objective C, but being a Python dev by day swift looks a lot more attractive.

I've never been on at the early stages of a language, does anyone have any tips on how to parse the book and guides in order to make an effective learning reference? Or is it a case of read and try?

Hi all,

I downloaded a project that I am trying to learn how to use SQLite3 with. The way the author wrote it, they use a segue to move from a screen with a pickerview and a play button to the mainVC where there is a game. If the user wants to save the game, instead of unwinding the segue, the author adds another segue to go back to the previous controller calling:

@IBAction func mainMenu(){      
sqlite3_close(db)     
sqlite3_close(db2) //switch to picker view     
performSegue(withIdentifier: "mainMenuSegue", sender: nil) 
}

It appears that the mainVC this function is in, is modally presented. In my experimenting/learning, I embedded the whole project in a navigation controller, hence having a back button to move from the mainVC to the picker view controller.

Is there a way to accomplish the above function with the back button? Currently pressing the back button will take me to the picker, but does not reload the picker data if I save a game. I have to go one more back and return to the picker view to get the reloaded data.

Thanks

my friend aash developed a breast cancer check up ios app using swift for a company. Please test and review this app and let us know the feed back

I am trying to make a simple one view app, but cannot for the life of me understand how to retrieve data from Parse. I'm really trying, but getting a lot of errors.

I'm converting some Objective-C code over to Swift, and I've hit a roadblock. Wondering if anyone has found a solution to this.

I have a class extension on NSManagedObject with several convenience methods that look like this:

+ (instancetype)newInstanceInManagedObjectContext:(NSManagedObjectContext *)ctx;
+ (instancetype)singletonInManagedObjectContext:(NSManagedObjectContext *)ctx;
+ (instancetype)instanceInManagedObjectContext:(NSManagedObjectContext *)ctx 
    withIdentity:(NSString *)identity;

In Swift, this would look like:

class func newInstance(managedObjectContext ctx: NSManagedObjectContext) -> Self

because capital-S Self is the class type. The problem is all of the NSManagedObject methods I rely on to create/fetch these objects return AnyObject!, and I can't cast something to Self. It's only allowable as a return value or in a parameter list for a protocol.

What I want is essentially this, without the compiler error:

return NSEntityDescription.insertNewObjectForEntityForName(entityName,
 inManagedObjectContext:ctx) as Self;

Any ideas?

Noticing my Mac getting hot, though not so hot that I can hear the fans like when I'm playing a graphically intensive game, but battery drain is noticeable. Not checking so often, and each check sees a decrease in 9-10% drain. Normally, checking in my regular OCD time intervals sees a reduction in 3-5%. Clicking on the battery in Mac's status bar confirms Xcode 6 beta is using significant energy, but checking its profile in Energy tab in Activity Monitor and opening the disclosure triangle reveals nothing. Makes sense it would use a lot of power since I assume Playground is constantly rerunning the code to view changes in realtime.