Swift

Import UIKitclass Person: NSObject {var name: String? { // can give newvalue a custom name willset (new) { //The property is about to change and the method that is called when it is not changed // In this method there is a default system attribute

First, Swift basic operation Import FrameOC is #import Swift is import UIKit Swift definition Identifiers: Constants or variables must be specified VAR (variable)/let (constant) identifier name: type of identifier =

Official website: http://snapkit.io/Github:https://github.com/snapkit/snapkitSnapkit is a DSL-to-make Auto-Layout easy on both IOS and OS x. Simple & Expressive Chaining DSL allows building constraints with minimal amounts of code while

Swift-Add Pure AlamofireIf you have a neat code and can't tolerate any extra stuff, keep looking down.1. Download alamofire (https://github.com/Alamofire/Alamofire)2. Unzip and open alamofire.xcworkspace3. Delete unnecessary content (depending on

Swift-calayer Animation of Contents propertiesEffectSourceHttps://github.com/YouXianMing/Swift-Animations////Liveimageview.swift//swift-animations////Created by youxianming on 16/8/17.//copyright©2016 year youxianming. All rights reserved.//Import

Optional type * Optional type indicates that a variable can have a value or no value * C and objective-C do not have an optional type concept * Only optional types in Swift can be assigned nil* If you declare an optional constant or variable but are

Defined letDefines constants that are not allowed to be modified once assigned varDefine variables that can still be modified after assignment //: # 常量//: 定义常量并且直接设置数值let x = 20//: 常量数值一经设置，不能修改，以下代码会报错// x = 30//: 使用 `:

Swift-Draw a background lineEffectSource////Backgroundlineview.swift//Linebackgroundview////Created by youxianming on 16/8/14.//copyright©2016 year youxianming. All rights reserved.//Import UIKit//mark:public

Swift-uitableview Expanding the Zoom animationEffectSourceHttps://github.com/YouXianMing/Swift-Animations////Headerviewtapanimationcontroller.swift//swift-animations////Created by youxianming on 16/8/9.//copyright©2016 year youxianming. All rights

Code Explanation: (Additional code is explained later)Home design Uipickerview Style design:Leftarray = ["Flower", "color", "shape"];Let array1 = ["Jasmine", "Rose", "Tulip", "Violet"];Let array2 = ["Red", "yellow", "black", "white", "purple"];Let

var data:nsarray!var scrollview:uiscrollview!var pagectrl:uipagecontrol!Override Func Viewdidload () {Super.viewdidload ()Instantiate TableViewLet Tableview:uitableview = UITableView (Frame:self.view.bounds,

In OBJC you can't put a non-object type into an array, you have to "Marshal" it and then put it in the array.In Swift you can easily put non-object types into an array:let ary = [1,2,3]You can explicitly specify the element type:let ary:[Int] = [1,2,

Sorting algorithms are often used, such as: bubbling, selection, quick sorting, binary insertion sorting, and so on. The front two does not say, paste out their own quick sort and binary insert sort of swift and Java code implementation, like the

1, Label creation 12345678910 importUIKitclassViewController: UIViewController{    overridefuncviewDidLoad() {    super.viewDidLoad()    //设置标签x坐标：10，y坐标：20，长：300，宽：100    varlabel=UILabel(frame:CGRectMake(10,20, 300, 100))    label.

Object-oriented general overview: Swift is not only capable of process-oriented programming, but also object-oriented programming (OOP). Object-oriented is actually "taking the object as the core", thinking that our objective world is composed of

1. Functions1.1 Func Funcnmae () {} This defines a function whose arguments are null, the return value is NULL, and if the parameters and return values are written directly in two brackets.The 1.2 parameter needs to indicate the type, and if no

Defining enumeration methods an enum Season {//Each case defines an instance of the Spring cases Summer-Fall-the-winter}//definition enumeration mode two enum WEEKDA Y {//Use a case to list all enumerated instances cases Monday, Tuesday, Wednesday,

You know that Swift has arithmetic operators similar to C,OBJC, which are:+-*/%But you may not know that there is a big difference between the operators in Swift and the C,OBJC language that they cannot be "spilled", either overflow or underflow!In

Arc4random () This global function generates a 9-digit random integer1, the following is the use of the Arc4random function to find a 1~100 random number (including 1 and 100)Let Temp:int = Int (arc4random ()%) +1 Print (temp)2, the following

Selectable options to determine Because the optional content may be nil , and once is nil not allowed to participate in the calculation therefore, in use, it is often necessary to determine whether the content of an option isnil