Swift

How to implement a switchover between multiple storyboardAs you know, Main-board is the entrance to the program run, if not found will throw an exception, open the Plist file can see the description of the Main-board, specifically formulated its

With the swift language constantly updated iterations, the pure Swift language writing code is more compact and simple, combined with the use of Storyborad, so that the threshold of the development of Apple app is reduced a lot. It is also

How classes are defined in SwiftClass Name {Property...Method...}A class is a reference type whose instance is assigned to the heap to see how the attribute methods in the class differ.Attributes in a class are divided into storage properties,

This section focuses on Swift's initialization function, which is the constructor initclass, struct, enum have initialization function, take class exampleThe first point is that all stored properties must have a value at initialization of the class.

This chapter looks at Swift's function declaration and invocationFunction declaration func function name (parameter), return type {function code block}Let's make a statement.//no parameter no inversefunc Test () {print ("Asdfa");}//There are

Variable type operator reason: because the weak type of Var is used in Swift to point to any variable, Swift requires that the code farmer must be sufficiently sure of the type of the variable that he writes when writing the code. At this point we

override func viewdidload () { Super. Viewdidload() //1.Print(sumof(1,2,3,4,5,6,7, 8,9,ten)) //2.show itShowLabel. Text = String(sumof(1,2,3,4,5,6, 7,8,9,ten)) //3. function Nesting func Returnfifteen (), Int { var y =

Many GitHub libraries after many years of development, the source code are written by OC, so, using Swift to call OC Library is a problem inevitably encountered in the development, this article takes afnetworking as an example, explains how to call

Closures, which can be understood as a piece of code enclosed in curly braces.All of the following belong to the closureGlobal functionsNested functionsClosed-Packet expressionClosure expressions can be used to simplify code and make code more

Import UIKitclassResetbtn:uibutton {Let image_ratio:cgfloat=0.7 //the ratio of the picture to the height of the buttonLet title_font:cgfloat= - //set the default size of the button caption font OverrideInit (frame:cgrect) {super.init

Mac system comes with Ruby, use Cocoapods, install cocoapods directly.Terminal: $ sudo gem install Cocoapods{The installation is slow because there is a wall, view the list of Ruby images: $ gem source-lCan try to delete the original image, add

Swift contains C,cint, CBool, and CChar in front of the underlying type of Cunsafepointer Const char * for C, constant pointer not variableunsafemutablepointer char * for c; variable pointerThe following first behavior string turns char*; second

Call function, when there is a closure parameter:In the implementation of the function: When the closure is a parameter, there is a parameter return value type;When a closure is called, the incoming parameterWhen calling a function: The closure is

Probably the most significant addition to Elements 8.1 are our new Silver compiler front-end, which brings Apple ' s new swif T language, recently voted as the most loved programming language, into the compiler.With Silver, you can now use the Swift

Today, we wrote a view with Swift, adding a gesture to the view as follows: 12 panGestureRecognizer = UIPanGestureRecognizer(target: self, action: "beginDragged:")addGestureRecognizer(panGestureRecognizer) Run the

Http://www.swiftv.cn/course/hw4sysi7 This course is short and adds up to one hours, suitable as a quick learn. 0. Environment Xcode-workspace-project-command Line OS X application 1. Variable type var variable let constant println () output requires

See the line chart in Apple health. We're just going to create a line chart like this. If you haven't seen it, look.Our theme is the line chart itself. The contents of other descriptive classes, including steps, daily averages, are not covered

Use of notifications1. Send a notification. (Take this notice as an example, notice name: Nicknamenotification notification parameter: title)Nsnotificationcenter.defaultcenter (). Postnotificationname (object:title);The title here is the parameter

destructors apply only to class types, and the destructor is called immediately before an instance of a class is disposed. Destructors deinit are labeled with keywords, similar to those used by constructors init .Principle of the process of

Source file extension for 1.Swift. Swift2. Two not required: ① do not need to write the main function ② no need to add a semicolon after each statement3. Multi-line annotations can be nested4.let declaring a constant VAR declaration variableLet