Swift

Class inheritance and construction proceduresAll of the stored properties in the class--containing all the attributes inherited from the parent class--must be set during the construction process for the initial value.Swift provides two types of

ObjectiveFor someone who's ever developed Android, without these basic attributes it's outrageous, or it's a table spray, write code--#StatementWelcome reprint, but please keep the original source of the article:)Blog Park:

1, create an action table below (or call the bottom warning box) and pop up the display 123456789101112131415161718 class ViewController: UIViewController,UIActionSheetDelegate {    override func viewDidLoad()

In Swift, Optional,? And! The relationship betweenOptional equivalence with ClassName? Yes, ClassName! forcing a value causes a crash ( if the object is nil, the value crashes ) imageview!. Image is a imageView forced unpacking, ImageView.

In swift, we can define class variables with clear syntax:class variables defined by static cannot be overridden in subclasses, and class variables defined by class can be overridden in subclasses.struct somestructure { static'Some value. "

Original articles, welcome reprint. Reprint Please specify: Dongsheng's BlogThe corresponding mutable string can be inserted, deleted, and replaced, and string provides several ways to help implement these operations. These methods are as

Swift 2.0: ' Enumerate ' is Unavailable:call the ' Enumerate () ' method on the sequenceThe following code: for inch Enumerate (self.tableView.visibleCells) { if? Chatcell { acell.changecolor (self.iswhitebackground)

extension string{func subString ( fromFromindex:int, to Toindex:int)string{varhalfstring = Self.substringwithrange (range(Start:advance (Self.startindex, FromIndex), End:advance (Self.startindex, Toindex)))returnhalfstring} func subString (

Swift has excellent functional programming skills, and interviewers like to ask us for quick sorting when interviewing, so how do you make a quick order with Swift? First extend the array class:Array { var decompose : (head: T, tail: [T])? {

Basic usage of Uinavigationcontroller and several ways of page passing本文介绍UINavigationController基本用法，因为涉及多页面顺便介绍页面传值1. Handwriting Code creationUINavigationControllerHandwriting creation is simple, first creating a project, which is loaded from

ScrollView注：本小节详细介绍scrollView的用法Uiscrollview is a scroll-capable view control that can be used to display a large amount of content, and can be scrolled to see all the contentUiscrollview usage, add the content you need to show to UiscrollviewSet

1. String Definitionsvar s = "Aaaaaa"The two strings are both empty and equivalent. var emptystring = "" var anotheremptystring = String ()String literals can contain the following special characters:Escape Character\0(null character),\\(backslash),\

Nsthread Thread Sync LockThe above section uses Nsthread to realize the reading of the network picture, which NSThread simulates a ticket selling example. Use NSLock or NSCondition lock resourcesvar100//总票数 var0 //窗口1卖出票数 var0 //窗口2卖出票数

When programming with Swift we often use closures, although closures are good, but inevitably bring "retention ring" issues, consider the following:There is a loop function in an animation frame:loop(duration:NSTimeInterval,reverse:Bool,animations:()

Now the iOS program is developed, basically using Swift to write code. However, many third-party libraries are built by OC, so when you integrate a third-party SDK, you will encounter some problems. The following is my integration QQ share

Tagged with: GitHub mediaplayer UIView Animated MusicRecently wrote a music player with Swift. To tidy up the knowledge points.1, the use of Tabview, the addition of Tabviewcell UIView animation2. Swift network asynchronous request and data analysis3

Learning from the Geek Academy: functions in SwiftTool: Xcode6.4Directly on the basis of the sample code, more knocks more experience will have a harvest: hundred see not like a knock, a knock will1 Import Foundation2 3 /*********** nested function *

Learning from the Geek Academy1 Import Foundation2 3 classUser {4 var name:string5 var age:int6 Init (name:string,age:int) {7Self.age = Age8Self.name =name9 }Ten } Onevar u1 = User (name:"He Yang", Age: at) Avar U2 = User (name:"He Yang", Age:

The following page shows my message and the user can click the Edit button in the upper right corner to enter the deletion status. When you click the Edit button, the button text changes to "Cancel", the upper left corner of the button becomes