Swift

Import Foundation/**1. Open the Database2. If there is no data table, you need to first create a table3. Data operation */Class SQLite {var db:copaquepointer = Nil ///Open Database /// ///:p Aram:dbname Database name /// ///: Returns: whether to

Strings and charactersIf Apple does not provide Unicode strings and characters, it is that all of their company's brains are locked in his own home to send a very many country version of the software, how may not use Unicode is omitted here 30 words

Original articles, welcome reprint. Reprint Please specify: Dongsheng's BlogCode layout includes: blank lines, spaces, line breaks, indents, and so on. The content of the code layout is much more workload, but very important.Blank LineEmpty lines

For programmers accustomed to OC code, Swift's syntax is simply unbearable, and today some of the most common UI controls are simply collated.Import Uikitclass Viewcontroller:uiviewcontroller, Uipickerviewdatasource, uipickerviewdelegate {override

Import FoundationPrint ("Hello, world!")Let A = 10var B = 20var C = a + B;c = 3000Overloading: The function name is the same, the function type is different (parameter, return value is different), constitute the overload, call the time, according to

Before we introduce static properties, let's look at the design of a class that has an account (bank accounts) class, assuming it has 3 attributes: Amount (account amount), interestrate (interest rate), and owner (account name). Of these 3

Swift has many ways of storing data, and you can use enumerations ( enums ), tuples ( tuples ), structs ( structs ), classes (), classes in this article we will compare enumerations, tuples, struct-bodies, first from the simplest start-tuples (

: Playground-noun:a place where people can playimport the uikit//tuple is the collection of multiple different values into a single data/* tuple is a data type that is not in objective-c, similar to an array, represents a A collection of group data,

: Playground-noun:a place where people can playimport uikit//define an array var userscores:[int]? = [990, 572, 3258, 9999, 1024x768, 666]userscores = Userscores?? []//defines a function//NOTE: (Maxscores:int, Minscores:int)? and (Maxscores:int,

//Viewcontroller.swiftSonganimation//Created by Su on 15/12/10.Copyright©2015 year Tian. All rights reserved.//Import UIKitClass Viewcontroller:uiviewcontroller {Override Func Viewdidload () {Super.viewdidload ()Let WindowWidth = Uiscreen.mainscreen

Original articles, welcome reprint. Reprint Please specify: Dongsheng's Blogoverriding instance PropertiesWe can override the attributes inherited from the parent class in the subclass, with the attributes of the instance and the static attributes,

original articles, welcome reprint. Reprint Please specify: Dongsheng's blog  You can use the constructor proxy in a constructor to help complete some of the construction work. Class constructor proxies are divided into horizontal and upward proxies,

Definition and invocation of functionsFunc begins with the type returned as a prefix,->The result of the add output is 11.Function parameters can also have multiple parameters, written in parentheses separated by commas.1 func Introduce (name:

1. Definition letDefine constants that are not allowed to be modified once they are assigned, more secure varDefine variables that can still be modified after assignment You should select constants as much as possible

1.Swift Development Quick Experience1.1 Goals Playground Quick experience & learning resources sharing Project development quick Experience, understanding Swift BASIC Program Structure 1.2 Learning Resources Apple Official

First up;Function:-Single Task download-Pause Download Task-Cancel Download Task-Breakpoint Download-Show download Progress and speed-Multi-tasking download-Control individual tasks separatelyIn the current wave of mobile internet, mobile apps are

? Introduction to Swift Process Control? Swift provides a C-like process control structure that includes a for and while loops that can perform tasks multiple times.Select if and switch statements that perform different code branches based on

Flow controls (Control flow)For cycles for cycling and C language, OC usage is very similar, usually for () and for in two kinds. Traversal can use the underscore "_" to access the values slightly.Switchswitch is much more flexible in swift. Just

SWIFTV Classroom http://www.swiftv.cn/ Swift Chinese web http://www.swiftvip.cn/ Swift fan http://www.swiftmi.com/ swiftist http://www.swiftist.org/ app4code http://www.code4app.com/ Wheat Academy http://www.maiziedu.com/ mu class net

Original articles, welcome reprint. Reprint Please specify: Dongsheng's BlogAn array is a series of ordered sets of elements of the same type. The collection elements in the array are ordered and can recur.You can use one of the following statements