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kostiakoval.github.io

Turn Computed Property into Lazy Property

http://kostiakoval.github.io/posts/turn-computed-property-into-lazy-roperty

Turn Computed Property into Lazy Property. Jul 16, 2015. Is a computed property and it is evaluated every time we call it. The. Is printed twice to console. What I want is to turn it into a lazy static property. It is very simple, add. Plus we should make it immutable by using. Struct Type { static let keys: [String] = { print("Executed") return ["One", "Two"] }() } Type.keys Type.keys. We have increase Performance in few seconds and fixed side effects bugs.

kostiakoval.github.io

Swift - Adopting Sequence

http://kostiakoval.github.io/posts/swift-adopting-sequence

Swift - Adopting Sequence. Jul 16, 2014. I was implementing my own Stack collection based on the WDDC session video. After implementing Sequence protocol, I thought that this look like a generic code. Extension Stack : Sequence { func generate() - StackGenerator T { return StackGenerator(items: items[0. items.count]) } } struct StackGenerator T : Generator { mutating func next() - T? I've start looking for alternative. There is. In Swift Let's use that. That does exactly what I want.

kostiakoval.github.io

Static typed Safe Dictionary

http://kostiakoval.github.io/posts/safe-dictionary

Static typed Safe Dictionary. Jul 17, 2015. Task: Map [String] - [String]. I need to map String keys to some other String keys. I have some defined keys and I want to map them to different keys. This could be a StoryboardIds, some actions from server etc. As example let's say we have. Keys and we need to map them to. The fist idea is to use. Ok this works, But. There is problem with this solution. The keys in the dictionary are not static typed. You can make a. Puppies HACK THE APP".

kostiakoval.github.io

Swift - Capture self in block is fixed

http://kostiakoval.github.io/posts/swift-capture-self

Swift - Capture self in block is fixed. Jul 9, 2014. Do you remember issue of implicitly captured self in block and reference cycle in Objective-C? In swift this is fixed now. This is the code. All reference to self in a closure must be explicit. You will see this compiler error -. Reference to property 'name' in closure requires explicit 'self.' to make capture semantics explicit. Capture list We can declare what object should be weak or unowned in the closure. The syntax is.

kostiakoval.github.io

Swift - property with private setter and public getter

http://kostiakoval.github.io/posts/swift-public-property-with-private-setter

Swift - property with private setter and public getter. Aug 1, 2014. Apple has added Access Control. To Swift, and it's awesome. Class Person { public var name: String private var UUID: NSUUID }. Usually we want to disable modification of the properties for rest of the system, make a black-box. Component. In the documentation it says. Swift allows the get of a property to be more accessible than its set. Class Person { public var name: String private(set) var UUID: NSUUID }.

kostiakoval.github.io

Hope for Best - Prepare for Worst

http://kostiakoval.github.io/posts/hope-for-best-prepare-for-worst

Hope for Best - Prepare for Worst. Jun 24, 2014. Recently I've published iOS quiz game. I've been doing iOS for almost 5 years but I've never faced so many troubles during lease phrase. This post is about what can go wrong, how to prepare for it. How much time do you need to release an app. It takes approximately about 1 week for app review. Apple can reject your binary. Alway add this to your estimate, event if your app is really simple and you are sure that you haven't broke any review guidelines point.

kostiakoval.github.io

Fixing WWDC closure code

http://kostiakoval.github.io/posts/fixing-wwdc-closure-code

Fixing WWDC closure code. Jul 9, 2014. If you try code about closures for WWDC 2014 session 403. You will see this error. Int' is not a subtype of '()'. The problem is that onChange closure is taking 1. Parameter, and it has to be specified in the body of the closure. There is a simple fix to it. You have to declare variable names in closure. Or use shorthand style. And make explicit return, to return void. Blog about iOS development. Swift languages, iOS8 and more.

kostiakoval.github.io

CoreData in Swift

http://kostiakoval.github.io/posts/coredata-in-swift

Aug 31, 2014. The first thing you see when you create new Project with CoreData template is ugly generated boilerplate code with that issues. Breaks Single Responsibility principle. The architecture doesn't scale well for bigger project,. MARK: - Core Data stack lazy var managedObjectContext: NSManagedObjectContext? Nil if moc.hasChanges &! Mocsave(&error) { / Replace this implementation with code to handle the error appropriately. NSLog("Unresolved error (error), (error! UserInfo)") abort() } } } .

kostiakoval.github.io

Access Control in Swift

http://kostiakoval.github.io/posts/access-control-in-swift

Access Control in Swift. Jul 23, 2014. In Xcode6 Beta4 was added Access Control to Swift. Entities can only be accessed from within the source file where they are defined! Entities can be accessed anywhere within the target where they are defined! Entities can be accessed from anywhere within the target and from any other context that imports the current target’s module! By defaul is used internal. Read more about Access Control. On Apple Swift blog. Is a great discussion this new feature.

kostiakoval.github.io

Habit of Contributing

http://kostiakoval.github.io/posts/habit-of-contributing

Jul 24, 2014. The iOS developers community has grown tremendously for last few years. I remember those days when there wasn't cocoapods. We use those great libs and projects every day, but we should not forget to contribute back to the community. At this moment many would say,. Yea, but I don't have time for that". Yes, that's true. If you are working as full-time employee, it could be hard to find time for it. Of the library you find a bug and want to improve. Write code, commit it. Make a pull request.