Swift

Arrays are common data types in Objective-c, as is the case in Swift, where there are Nsarray and Nsmutablearray in OC, but only let and Var are used in Swift to differentiate whether an array is mutable, Arrays in Swift are type-safe, so the type

Intercept string RangeWe can intercept string strings by Range:Import Foundationvar str = "Aha, hello, why" let Rangeofhello = Range (start : Advance (str . StartIndex, 5 ), end : Advance (10 )) let Hellostr = str . Substringwithrange (Rangeofhello)

1. will be String converted to NSString re-interception, the code is as follows: var s="1234567890"var ns1=(s as NSString).substringFromIndex(5)var ns2=(s as NSString).substringToIndex(4)var ns3=(s as NSString).substringWithRange(NSMakeRange(4,

Cyclic strong references in closuresResolving cyclic strong references between closures and class instances can be achieved by defining a capture list.Capture ListEach element in the capture list is made up of a reference to the weak or unowned

Auto reference countFirst to accompany her sister to see the film, Dot code to occupy a hole.Weak referencesIt can be preceded by weak an indication that this is a weak reference. A weak reference does not hold the referenced instance, and it does

Related informationStart developing iOS apps Now (start developing iOS apps today)Apple Development Chinese station CocoachinaSwift Development Official websiteIOS Developer LibraryThe Swift programming language Chinese Full versionInspector

//Playground-noun:a Place where people can playImport UIKit//Array Dictionary//The set of variables assigned to the Var set is a mutable mutable, and the set assigned to let is immutable immutable//array array equivalent to [SomeType]var

ARCFull name automatic reference counting, is a memory management mechanism. When the number of strong references to a block of memory equals 0, the memory is freed.Because enumerations and structs are value types in swift, they are not stored and

Xcode 6.1 introduces a new feature to assist in the development of Swift, the read Eval Print loop ("read-evaluate-output" loop, referred to as REPL). Developers familiar with interpreted languages will feel comfortable with this command-line

The Swift language released by Apple can exist in one project with the previous objective-c language.There may be people who think that there can be objective-c or swift in the same class file, which is not right. In the same class file or in the

Definition of the array:var Beijing line Line 10 = ["National Library", "BA Gou"]Beijing Line Line 10. Count//or the length of the arrayIf Beijing line Line 10. IsEmpty {println ("The array is empty");}Add a value to the array,Beijing Line Line 10,

5. Control Flow 5.1 loop 5.1.1 for in5.1.2 for condition increment5.1.3 while5.1.4 Do While5.2 Article Statement 5.2.1 if Else5.2.2 Switch Case5.2.2.1 interval matching and tuple 5.3 control transfer 5.3.1 Continue5.3.2 Break5.3.3 Fallthrough

9. Classes (Class) 9.1 constructs　　　　9.2 Whether the class is a value type or a reference type　　　　9.3 Identities　　9.4 About pointers　　Construction of Class 9.5 init () and destructor deinit{}　　Inheritance of Class 9.6 (inheritance) 9.6.1 subclass

Several ways of Swift singleton mode:1. Global variablesPrivate Let _singleton = Singleton () class Singleton:nsobject { class var Sharedinstance:singleton { get { re Turn _singleton }}} 2. Internal variablesClass

Playground-noun:a place where people can playimport uikit//------------------------------------------------------- -----------------------//1. Basic use//switch and OC difference://1> do not need to write break//2> each branch of the conditions of

The interrupt point is too slow when debugging, so the output log is a good choice. Breakpoint, a row of the press, too troublesome. From a single piece of log , it is quickly possible to find out which function is where the code is not executed.

In the objective-c, in order to make the code organized by the convenient use of Control+6 shortcut keys in Xcode to find, so there is a lot of people are familiar with the east. This is:#prama Mark.#pragma markBut what does this thing correspond to

Swift has been out for months and has not really cared about swift, apart from sharing a bit of knowledge with colleagues. The learning of SWIFT data compiled on GitHub is still good, and is now available in E-book and PDF format.Swift's syntax is

Original: http://leancodingnow.com/swift-learning-resources/Swift is the new programming language that Apple launched in WWDC this year, and its 1.0 version is officially released with Xcode 6. This article mainly lists some learning resources about

Apple that document wrote a lot of it and did not write down the optional value (optional) this thing. There is a "Optional Chaining" chapter, but it is not fully explained. Finally found a half-day in the "The Basics" ink a few words. If you don't