Swift

Constructor (top)A construction process is a preparation process that uses an instance of a class, struct, or enumeration type. This process includes setting the initial values for each stored-type property in the instance and performing the

Import foundationimport uikit//////@brief UIView extension method to facilitate engineering global use of extension methods to create or use all controls that inherit from UIView///extension UIView {/// /Gets or sets Origin.x//func Originx

Import Foundationimport uikit//////@brief The Universal extension method of string///extension string {//////@brief Gets the height of the string//@para M fontSize font Size///@param width limit a line is displayed for widths///@return Returns the

1Let manager =Afhttpsessionmanager ()2Let URL ="Http://v.juhe.cn/weather/index"3Letparams= ["format":2,"CityName": City,"Key":"Ead46e88f98d0cd48730bdcde2"]4 5 //Progress do task progress acquisition6Manager. GET (URL,

Let label = Uilabel.init () Label.backgroundcolor = Uicolor.graycolor () label.text = "1234567890- EDFDGDDFFGFGFGGFGGDDFBYFRU6Y6R7IUYMGNJNRTFUGYU57T6INJYUNJOKN89UILMGHBJL,

InheritanceA class can inherit another class's methods (methods), attributes (properties), and other attributes. When a class inherits from another class, the inheriting class is called a subclass, and the inherited class is called the superclass

The functions in Swift are divided into the following categories.1> non-return 2> without a parameter and return to the 3>, there is no return to the 4>, there is a parameter return to the 5>Two. Take a look at some of the following examples1> no

1. StabilityWhen the Swift2.0 came out, 1.0 of the code was basically changed over.2. NecessityAt present, there are about 100w on the App Store is OC written, if it is a simple hobby, you can learn swift, if engaged in professional development,

Selectable type/optional chain MAKE-BY-LJW---Reprint please indicate the source ... Its optional representation is that the target of the request or call may currently be empty (nil) If the optional target has a value, then the

Step by step Swift integration for Xcode objc-based project: Create new *.swift file (in Xcode) or add it by using Finder ADD Swift Bridging empty header if Xcode has not do this before (see 4 below) Implement your Swift class by using 

1 ///////////////keywords used in declarations/////////////////2 3 //1.class Declaration of a class4 Public classAClass {5 //. class declares a class function6 Public classFunc test (Let Num:int)void{7 8 }9 }Ten One //2.deinit

MethodA method is a function that is associated with some particular type. classes, structs, enumerations can define instance methods , and instance methods encapsulate specific tasks and functions for instances of a given type. classes, structs,

func stringmid (wholestring:string, front:string, behind:string),string {if wholestring. IsEmpty {return("") //wholestring cannot be nil }Else { var whole:nsstring=wholestring let frontindex = whole. Rangeofstring(front) if frontindex.

First View Controller:Import UIKitFollow the agreementClass Viewcontroller:uiviewcontroller,secondvcdelegate{Override Func Viewdidload () {Super.viewdidload ()Create a buttonLet button1 = UIButton (Frame:cgrectmake (120, 120, 50, 50))Modify

Tuples are unique in swift, and there is no correlation type in OC/*It is a data structure, which is widely used in mathematics.Similar to arrays or dictionariesYou can define a set of dataThe data that makes up the tuple type is called the "element"

Import FoundationCreate a classClass Student {Property (The property of a class must be assigned an initial value, and if it is not assigned, a custom method needs to be written)var studentname:stringvar studentage:intMethodFunc Fallinlove (girlname:

func stringmid_pl (wholestring:string,front:string,behind:string,inout Return_string:string, getheroid:Bool) {// array parameter inout //var whole_tmp:string = wholestringif wholestring. IsEmpty {//Return (return_string)//wholestring

This method in the Baidu map demo bus Search a class of files;The parameter is a polyline that is connected to all the callout points, which can change the extent of the map display, and show the optimal display scale (pro-test in your own project)

The content of this article is referenced from portal. the original was written in OC, and I changed it to Swift. Let's start by looking at:The first picture is that we drew an image of "IOS", the second picture is that we clicked save successfully,

Panda Pig • Patty original or translated works. Welcome reprint, Reprint please indicate the source.If you feel that the writing is not good please more advice, if you feel good please support a lot of praise. Thank you! Hopy;) We know that in