Swift

Import Foundation class Yjnetworkmanager:nsobject { /** to determine network type -Returns: return value string WiFi (Kreachableviawifi) mobile network (Kreachableviawwan) no Network (knotreachable) */ class Func

Enumeration in the C language, the value of an enumeration can only be a number, and in swift the value of the enumeration is called raw value and can be represented by string, Character, Int, float, and so on. Enum MyEnum { } For example: The enum

1. Swift enumerates basic conceptsThe enumeration in Swift is more powerful than the enumeration in OC, because the enumeration in Swift is a first-class type. It can add properties and methods like classes and structs format: Enum method{Case

Let slider = UISlider (Frame:cgrectmake (10.0,10.0, Cgrectgetwidth (self.view.bounds)-10.0 * 2), 20.0 ) Self.view.addSubview (slider) slider.backgroundcolor = Uicolor.lightgraycolor () Set value (the default value is 0.0 and the value range is 0.0~1

One, the compiler's several symbols to be easy to debug #file--> contains the path to this symbol file #function--> The name of the method that contains this symbol #line--> Line number Ii. generating random numbers in a certain range Func

First, the circular statement 1. For loop 1) for-in cycle, for each element in the data range, sequence, set, etc., is executed once For a In 0...5{}//loop iteration, from A=0 to A=5, execute {} code Note: A loop exists, that is, {}a does not

The swift language uses VAR to define variables, but unlike other languages, Swift does not automatically assign an initial value to a variable, which means that the variable does not have a default value, so it must be initialized before it is

The string interception in Swift is not as convenient as using NSString, because the method substring (from: ) required by string is not of type int, This is inconvenient at the time of use, here I wrote a extension to string, the usage is very

var Alert:uialertview = uialertview.init (title: "Public Security entry and exit online platform", Message: "At present you can use the web version of the Immigration business reservation and inquiry, whether to enter the public security entry and

The way you write it, you can only use it as a summary of your own Swift learning. Import UIKit Typealias block = (string,string) () Class Movecarviewcontroller:uiviewcontroller,mamapviewdelegate,amaplocationmanagerdelegate,amapsearchdelegate,

: Playground-noun:a place where people can play Import UIKit Ordered collection var str = "Hello, playground" var array1:array = array () var array2: [Int] = Array1 var array3 = Array2 Array1.count If array1.isempty{ Print ("Kong"); } var

Viewcontroller.swift//button//import UIKit class Viewcontroller:uiviewcontroller {override Func Viewdidloa D () {super.viewdidload ()//❗️swift advocates://Replace ' Selector ("Buttontap") ' With ' #selector (VIEWC ONTROLLER.BUTTONTAP) '//button

Guard statement A guard statement is a bit similar to an if statement, and is determined by the Boolean value of the expression after its keyword to decide what to do next. But unlike the IF statement, the guard statement will have only one block

Get Imagefunc Fimage (_ imagename:string), UIImage { return UIImage (named:imagename)!} Get URL Urlfunc FUrl (_ urlstring:string)? { return URL (string:urlstring)}//authentication is the format of the phone number func isphone

1 when defining a model property, if it is an object, it is usually optional (create it when needed, avoid writing the constructor, simplify the code)2 If it is a basic data type, cannot be set to optional, and to set the initial value, otherwise

Syntax:   [HTML] View plaincopy {(Parameters )-> Return type in statements}     Example: function implementation:     [HTML] View plaincopy LetNames = ["Chris", "Alex", "Ewa", "Barry", "Daniella"] Funcbackwards (S1:

The first step is to set up the environment. I am an Apple system, and I am a poor boy. 8 K computers are far away from me. I am a black apple by myself. The total price is 1 K. I just need to learn enough. During this period, I learned a lot. That

Note: As the basic part has been roughly described in swift tour, the explanation does not reach 100% of the original meaning. Constants and variables constants and variables Both constants and variables need to declare names and types (as

The added type in swift: tuple (tuples) allows you to create or transmit a group of data, For example, when you return a function value, you can use a single tuple to return multiple values. The optional (Optional) Type is added to swift to

3. conditional statements It is often necessary to execute different codes according to different situations. You may want to execute an extra code when an error occurs, or output it to a value that is too high or too low. To meet these requirements,