Titlebook: Learn Swift on the Mac; For OS X and iOS Waqar Malik Book 20151st edition Apress 2015

朦朧

Extensions,When you write object-oriented programs, you’ll often want to add some new behavior to an existing class. For example, you might have designed a new kind of tire, so you’d subclass Tire and add the new, cool stuff. When you want to add behavior to an existing class, you often create a subclass.

charisma

Electrolysis

廢除

Mix and Match,Whether you’ve decided to start a new project that uses Swift, or want to update an existing Objective-C project to use Swift, you’ll end up needing both languages in your projects. Apple calls this feature ., where code written in either language can co-exist and work with the other.

squander

beta-carotene

Methods, as . and .. Methods are functions that are associated with a particular type. In Swift, methods can be associated with classes, structures, and enumeration types. There are two types of methods: instance methods and type methods.

調(diào)整

Expressions,combined to form a program. When the program is run, expressions are interpreted according to the rules set by the particular language. These rules can include precedence and associativity, and they produce results and possibly a new state for the program.

BOON

Interoperability with Objective-C,t Apple provides and perhaps with your own existing frameworks. You may be able to rewrite your frameworks in Swift, but Apple hasn’t provided its frameworks in Swift yet, if it ever will. Apple does provide interoperability with existing frameworks that use the Objective-C and C APIs.

HUMID

Waqar MalikThere‘s a new language in town..Swift is Apple‘s new, native, fast, and easy to learn programming language for i. OS and OS X app development..It‘s their "Objective-C without the C"..If you are an i.

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