Swift

本来是没有必要把这么小的一个知识点写到博客中的，但是，由于OC中的一些语法在swift中实现的时候有些特别，所以单独写下来到博客中，希望能够帮助到有需要的同学。The wording in 1.OCIn OC, we need to call this method to save the image to the album:void UIImageWriteToSavedPhotosAlbum(UIImage *image, id completionTarget, SEL

Many apps will use the user's current location information, this article will implement this small functionImport Uikitimport corelocation//Add Reference class Viewcontroller:uiviewcontroller,cllocationmanagerdelegate {let LocationM

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

Property Monitor1. Property Monitor Function Property Observer control and response property changes , each time the property is set to the value of the Call Property observer , even if the new value and the old value of the same time 　　 is no

Swift is a new OS X/ios programming language based on the evolution of OBJC, and OBJC is a programming language based on the C language. So theoretically OBJC and C + + is the same generation of products and OBJC and C + + are independent of the two

Pointers in SWIFT are mapped to genericsUnsafepointerUnsafemutablepointerA unsafebufferpointer that represents a set of continuous data pointersAn opaque pointer copaquepointer that represents a non-complete structure, and so onUnsafepointer is

1 you can get the number of characters in the string by calling the global countelements function and passing the string as an argument. 2Let Unusualmenagerie ="Koala??, Snail??, Penguin??, dromedary??"3println"Unusualmenagerie has \ (countelements (

1 we can combine multiple logical operations to express a compound logic:2 ifEntereddoorcode && Passedretinascan | | Hasdoorkey | |Knowsoverridepassword {3println"welcome!")4}Else {5println"ACCESS DENIED")6 }7 //output "welcome!"8This example uses a

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

I. Use of stringsLet wisewords = "\" I am a handsome\ "-boy" var emptystring = "" If Emptystring.isempty{println ("This is a null value")}Simple explanation: The IsEmpty method is used to determine whether a string is null, and then executes the

The Uisegmentedcontrol control is a segmented display control that allows the user to select any part of it that is displayed on it, each of which is like a button and, if pressed, executes the corresponding method as UIButton. In this article we

1. Construction of the project1.1 Creating a file1.1.1 Delete template files--Viewcontroller.swift, Main.storyboard1.1.2 Create a project structure, home directory classess---Level two directory module (function module), model (business model),

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/6C/E9/wKiom1VVlufxUevBAAGsh5KPdWM681.jpg "title=" QQ picture 20150515142627.jpg "alt=" Wkiom1vvlufxuevbaagsh5kpdwm681.jpg "/>I'm really sorry, gentlemen, from the beginning of July shift

//: Playground-noun:a Place where people can playImport Uikitvar str="Hello, playground."println ("---- character");/*characters: Swift and OC characters are not the same, Swift is in double quotation marks. The character type in Swift is not the

//: Playground-noun:a Place where people can playImport Uikitvar str="Hello, playground."/*Dictionary: Stores a set of unordered data formats: oc:nsdictionary *dict = [nsdictionary dictionarywithobject:@ "Lnj" forkey:@ "name"]; NSLog (@ "%@", dict);

During OC development I used a third-party AutoLayout library called Masonry, and after turning to Swift found that although Swift can be mixed OC, but always feel a bit of trouble, found on GitHub, this is called Snapkit third-party library, found

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 is the same as the OC Lazy loading mechanism, but this aspect of the domestic data is relatively small, today, the search engine for Bing after the discovery of Bing to find English \ The latest information is stronger than Baidu. We typically