Swift

viewcontroller.swift// 02swiftui//// Created by on 15/5/19.// Copyright (c) 2015 Wujiafeng. All rights Reserved.//import Uikitclass Viewcontroller:uiviewcontroller { override func Viewdidload () { Super.viewdidload () var

1 Swift provides two operators that facilitate the expression of a range of values. 2 closed interval operator3 4The Closed interval operator (A...B) defines an interval that contains all values from A to B (including A and b). The closed interval

1 You can modify a specific string by assigning it to a variable, or assign it to a constant to ensure that it is not modified:2var variablestring ="Horse"3Variablestring + ="and Carriage" //variablestring is now "Horse and carriage"4Let

Simple use of switch:In contrast to the switch statements in C and OBJECTIVE-C, the switch statement in Swift does not drop to the next case under each case by default. Instead, the first matching switch statement finishes when the first matching

First import the Avfoundation framework@IBOutlet weak var iconview:uiimageview!Override Func Viewdidload () {Super.viewdidload ()Createqrcode ()}Private Func Createqrcode () {Create a filterLet Qrfilter = Cifilter (name: "Ciqrcodegenerator")Reset

Function　　Swift uses the func keyword to declare a function: Func greet (name:string, day:string), String { return'Hello \ (name), today is \ ( Day). " }greet ("Bob""Tuesday")Return multiple values by tuple (tuple):Func getgasprices () (double,

//: Playground-noun:a Place where people can playImport Uikitvar str="Hello, playground."/*Arrays: Stores an ordered set of data array definitions: >OC: Array of values Nsarray *arr0 = @[@1, @2, @3]; Nsarray *arr1 = [Nsarray arraywithobjects:@1, @2,

 SwIft Learning　　[1] Swift is a programming language that Apple publishes in WWDC2014 to compose OS X and iOS applications. When designing for Swift. OBJECTIVE-C is the programming language that Apple's operating system uses before it is imported to

You can make a function or type a pattern by writing a name in the angle brackets.repeat(itemtimes: Int) -> [Item] { result = [Item]() forin0..times { result.append(item) } returnresult}repeat("knock"4)You can define paradigm

Swift's third-party library is still relatively small, and sometimes it is easy to use OC's third-party library.We use the following steps:1, the new Swift project, the first time you create an OC file will ask whether to generate a bridge connector,

According to international practice, the first program to learn a new language is to output a "Hello, world!" on the screen. In Swift, a line of code is done:println("Hello, world!")If you have written C or objective-c code before, you must look

To process the conditional logic, use the IF and switch to process the loop logic, using for-in, for, while, and Do-while. Brackets with conditions or loops can be added without adding. The curly brackets that handle the logical body must be

1. Definition of function and concept of calling functionA function is a block of code that accomplishes a particular task, giving the code block a meaningful name, called the function name. When the function needs to be executed, the name can be

Optional type What is an optional typeThere are two possible types of data for an optional value type: A value, no value (nil). Note that you need to add a question mark (?) after the variable type. If int plus question mark (?), the variable is of

1. What are the basic data type 1 basic types?Swift basic data types include integer and floating point type. The base type starts with an uppercase letter. Assigning a value to a type can only be assigned with a numeric value of the same

No matter what to do, as long as the dedication point, to do a good job. Don't always find excuses. Don't look down on small things, life is a collection of small things. Details determine success or failure. Soldier assault inside there is a line:

1. Definition of function and concept of calling functionA function is a block of code that accomplishes a particular task, giving the code block a meaningful name, called the function name. When the function needs to be executed, the name can be

The use of UITableView in Swift and OC is basically the same, but there are some grammatical differences. Let's start by writing a tableview step-by-step from 0.First, create TableViewImport Uikitlet ID="Cell" //cell ID, it is recommended to write a

The class of the switch statement in Swift uses another:Powerful switch statement var a:int = 100switch A Where a 0: println (" Positive ") Default: println (" Unknow ")}The logic that this code implements is the logic that we usually see

Five, setArray1. Generic type array2. Simplification [Type]var myar:arrayvar names:[string]Myarr = array ()Names = array (count:10,repeatedvalue: "Heri")Nums = array (count:100,repeatedvalue:0)var values = ["2", "3", "4", "O"]println (Names[1])Name[0