Swift

Heresy, heresy, I feel like this is map?1 enumAtmstatus {2 CaseSuccess (Int)3 CaseError (String)4 }5 6 varBalance = $7 8Func Withdraw (Amount:int)Atmstatus {9 ifBalance >=Amount {TenBalance-=Amount One return . Success (balance)

Swift is Apple's new programming language and Apple's first open source language. Compared to the original objective-c,swift to be more light and flexible. I recently used swift to practice a large number of algorithms (most of the big companies in

1. Closure definitionClosures: Closures are self-contained function code blocks that can be passed and used in code. Closures can capture and store references to any constants and variables in the context in which they are located. This is called

Swift does not have a main function without a placeholder for the string array dictionary in OC, etc. all need to be used @ but Swift is not used @Common types of dataLet B1:int = 10Let b2:double = 1.22Let b3:string = "SDF"var b4:character = "a"To

1. A function is a separate block of code that is used to accomplish a specific task. The use of functions in Swift is more flexible than in Java, and in swift, functions can be treated as arguments to other functions, or functions can be returned

//: Playground-noun:a Place where people can playImport UIKit//----Extension extension---------////function: Extend new functions (methods and properties) to existing classes, structs, enumerations//extensions in Swift do not have a name//1.

//: Playground-noun:a Place where people can playImport UIKit//----The use of dictionaries------////A dictionary is a container that stores multiple elements of the same type//Each value is associated with a key, which is identified as the stored

after writing for a long time, OC later wrote Swift, always feeling that it was Swift's fur, but in fact it was the core of OC, where some of the small details of OC migration to Swift were collated. 1 in the current class, the instance method

Types in swift fall into two categories: first, value types (values types), and each instance of a value type has its own unique data, usually a struct, an enumeration or a tuple, and two, a reference type (reference types), where instances of a

Swift can easily add subscript to a custom class where parameters and return values can be defined as any type in the class:Subscript (parameters), returntype { get { //return somevalue } set (newvalue) { //setsomevalue ()

Protocol (UP)The agreement is a very important part of Swift, which specifies the methods and properties necessary to implement a particular work or function. class, struct, or enum type can follow the and provide specific implementations to

collection type--arrayArray is a collection type in swift: arrays, which store multiple values of the same type using an ordered list, the biggest difference from the nsarray of OC is thatSwift's array is a value type, and an array of OC is a

ObjectiveSwift is actually much more complex than objective-c, and Swift incorporates a number of new features compared to Objective-c, born in the 80 's. It also makes it more difficult for us to learn to master the language. But everything is

Extensions are adding new functionality to an existing class, struct, or enumeration type, including properties and methods, and if you define an extension to add new functionality to an existing type, the new feature is available to all existing

Attributes (properties) Storage attributes (Stored properties) Computed attributes (Computed properties) Attribute Observer (property observers) Global and local variables (Variables) Type property (Type properties)

Description: Comparative memory is relatively easier to remember firmly, understand the C language relative to OC is not too difficult, OC is the C language extension, backward-compatible C language.Comparison of source file suffix names1.C Language

ObjectiveUnlike other programming languages, Swift does not require us to create separate interfaces and implementation files for custom classes and structs. All we have to do is define a class or struct in a single file, and the system will

/* Note: The variables inside the 1:struct and class are initialized, otherwise the instance cannot be created. 2:struct also have to instantiate, plus () 3:struct as a parameter, is not modifiable, need to add inout keyword, and the actual

1. Common data types in SWIFT: first uppercase int, Float, Double, Bool, Character, Stringarray, Dictionary, tuple type (tuple), optional type optional 2, specified data type in constant /variable followed by a colon (:) and a type name, and Delphi

What, do you want me to stay down?Nonsense, do not look at the rivals in front of me down, and then step on their bodies in the past to continue to fight, how I could be a moment before they fall.The meaning of life is unyielding struggle, as long