Swift

The functionality of an existing class, struct, or enum type can be added with the help of an extension. The functionality of a type can be joined with an extension, but the overridden feature cannot use the extension. Swift Extended functionality:

Swifit Sixth DayToday I am ready to take the initiative to seek a change, has been learning swift grammar, or is not intuitive. Simple is to know the grammar can still not know how to use Swift to do the project, so today did not go to see the

An example of switch: let vegetable = "red pepper"switch vegetable {case "celery": let vegetableComment = "Add some raisins and make ants on a log."case "cucumber", "watercress": let vegetableComment = "That would make a agood tea

var alert = Uialertcontroller (title: "", Message: "", PrefferedStyle:UIAlertControllerStyle.Alert)Add buttonLet oneaction = uialertaction (title: "", Style:UIAlertActionStyle.Default) {(action:uialertaction)->void inFetching text Box ContentsLet

Both remote push and local push require a registration notification codeIOS 8 divides the registration of the original one step remotenotification into two parts, one for registering the newly introduced "uiusernotificationsettings", and the other

First, set the Listening keyboard event function:Override func viewwillappear (animated:bool) { "keyboardwillshow:"object : nil) " Keyboardwillhide: " Object : nil) }Second, handle the popup event:func keyboardwillshow

Today, I wrote a delegate and encountered the following questions:The protocol here is problematic, if your protocol represents an object that implements the MO function, which is written id in OC, and in Swift it should be written like

ProgressBar is a very small thing that will be used in many places. Perhaps the Internet connection, perhaps the app itself has a lot of things to load. The default is only one rotating chrysanthemum, which is obviously not enough for creating a

I. OverviewThe use of AutoLayout has been around for some time, objective-c and Swift, under IOS7 and IOS8,All the way to meet a lot of pits, with the fill, to today is also a lot of accumulated experience, here to summarize,Share it with your new

Playground-noun:a place where people can playimport uikit//struct & class using struct Newstruct {var name:string = ""; var age:int = 18;} Class person{var person:newstruct = newstruct (name: "Michaelzero", age:20); var

//Playground-noun:a Place where people can playImport UIKit//Basic Operators//There are 3 types of operators: Monocular operators (such as-a), two-mesh operators (such as A+b), and three-mesh operators (a? b:c)Let (x, y)= ( -, -)//decomposing

This article from the study of this blog after the study notes, the original blog is written in OC, I recently learning swift, so rewrite to Swift.It is convenient to call each other between Swift and OC, but pay attention to the use of anyobject

When we develop with OC, we often encounter null values, and if we do not add any judgment, it may cause the program to crash, the swift language adds the concept of optional values, the basic syntax is as follows:Optional type:var optvalue:int? =

The following is a brief introduction to how getting and setting in Swift are used:Xcode version:6.1The code is first attached:Class Test { var num1:double = 0.0 init () { } init (num2:double) { self.num1 = num2 } var

Inheritance occurs in subclasses and parent classes, which are the inheritance relationship class diagram for a series of classes, the person is the root class in the class hierarchy, and student is the immediate subclass of person, and the worker

Declare several classes:// Animal Class class animal{ }// Terrestrial Animal class terricole:animal { }// Marine Animal Class class seaanimals:animal { }1,is used for type checking.Let cat =terricole () Let fish=seaanimals () let arr=[Cat,

Swift Learning -- the definition of class, used. inheritance, construction, etc. (v.)Instructions for using the class1 using class and class names to create a class name, such as: class studentThe only difference between the declaration of a

1, Arrays-array 1234567891011121314151617181920212223242526272829 var types = ["none","warning","error"]  //省略类型的数组声明var menbers = [String]() //声明一个空数组 menbers.append("six")  //添加元素menbers+="seven" //添加元素menbers.insert("one",

Exception handling, type conversion (any and Anyobject) 1, error handling (Exception handling)Swift provides the first type of error support, including throwing, capturing, transmitting, and controlling recoverable errors at run time. In Swift, the

Http://stackoverflow.com/questions/24050844/swift-missing-argument-label-xxx-in-call Up vote37down Votefavorite10 func say ( name:string, Msg:string) { Println ( "\ (name) say \ (msg)" ) }say ( "Henry" , "Hi,swift" ) error