Swift

Goal Playground Quick experience & learning resources sharing Project development quick Experience, understanding Swift BASIC Program Structure Learning Resources Apple Official Blog https://developer.apple.com/swift/blog/

Optionalis a major feature of Swift and the most confusing problem for swift beginners When a variable is defined, the variable is represented if it is specified 可选的可以有一个指定类型的值，也可以是 nil When defining a variable, add one after the type ? to

////Viewcontroller.swift//definition and use of closures////Created by think Peng on 16/9/17.//copyright©2016 of the year. All rights reserved.//Import UIKitclassViewcontroller:uiviewcontroller {Overridefunc viewdidload () {super.viewdidload ()//1>:

The For loop is simple and the main expression format is as follows:var firstforloop = 0For I in 0..Firstforloop + = i}Print (Firstforloop)Operator (.. var secondforloop = 0For _ in 0...4 {Secondforloop + = 1}Print (Secondforloop)The underscore (_)

As a new language with hundreds of family, Swift has the innate ecological advantage of Apple, and its many outstanding open source projects on GitHub. Since the Swift language was released by Apple in June 2014, the author @swiftlanguage has been

Swift-uitableviewcell Countdown Reuse SolutionEffectSourceHttps://github.com/YouXianMing/Swift-Animations////Countdowntimercontroller.swift//swift-animations////Created by youxianming on 16/9/4.//copyright©2016 year youxianming. All rights reserved./

Common keywords have the following 4 kinds ofKeywords related to declarations: class, Deinit, enum, extension, func, import, Init, let, protocol, static, struct, subscript, Typealias, and var.Statement-related keywords: break, case, continue,

Some public methods in Swift's UIButton class can be overridden, so if you want to write your own UIButton, simply inherit the UIButton class and rewrite the appropriate method.The system's UIButton can add the picture, may also add the title, but

In some cases, webview is used in the application to load large sections of text, but also with a variety of labels.You can't filter it all out, and then the content loses the format that you wanted to express.However, if WebView does not include

Import FoundationLet str = "123"var message = "Tuqiushuang, str"message+= "T"//character AppendIf str.isempty| | 200>90{Print ("Hao")}If str==message&&100>90{Print ("Hao")}Else{Print ("hao==")}var a = 1var B = 2Let M = "\ (str) and \ (Double (a) *0.1

The closure in Swift is used in the reference OC, basically consistent//Closure Type First write (parameter list)--(return value type)Func LoadData (callBack: (jsondata:string)()) {Dispatch_async (Dispatch_get_global_queue (0,0) {print ("Network

Swift uses Jspatch essentials: The Swift class inherits from the NSObject, its methods that inherit from the parent class are dynamic, other custom methods and properties need to be modified to be dynamic (except for the public property) example

This error occurs when you use Cocoapod to import a swift third-party:[!] Pods written in Swift can is only integrated as frameworks; Add ' use_frameworks! ' to your podfile or target to opt-in using it. The Swift Pod being used is: three-party

"Problem description"There is a Vatican tower called Hanoi, there are three pillars A, B and C on the Hanoi Tower, there are several discs on column A, all discs of different sizes, and small in the large under, as shown:Move all the discs on column

First, solve the problemXib/storybarod can be conveniently and visually set constraints, and is becoming more and more important in development. Because Xib cannot be packaged, encapsulation and reuse become impractical. This article describes a

Swift calculates label dynamic width and heightFunc Getlabheigh (labelstr:string,font:uifont,width:cgfloat), CGFloat {Let statuslabeltext:nsstring = LabelstrLet size = cgsizemake (width, 900)Let dic = Nsdictionary (Object:font,

Swift-To implement a mixed progress bar by overlaying UilabelEffectSourceHttps://github.com/YouXianMing/Swift-Animations////Mixedcolorprogressviewcontroller.swift//swift-animations////Created by youxianming on 16/8/21.//copyright©2016 year

Swift-Animated effects of multiple maskEffectSourceHttps://github.com/YouXianMing/Swift-Animations////Tranformfadeview.swift//swift-animations////Created by youxianming on 16/8/20.//copyright©2016 year youxianming. All rights reserved.//Import

//Dictionary (unordered data set)*the dictionary type of Swift is bridged to the Nsdictionary class of the foundation. * Format [:]/Dictionary()*Let immutable dictionary*var variable dictionary//Note:*the key type of a dictionary must follow the

Study Address: http://www.rm5u.com/or http://www.runoob.com/ Swift dictionary:• Create a dictionary:　　Create an empty dictionary of a specific type:var somedic = [keytype:valuetype] (): var somedic = [int:string] ()      Create an