swift csp

chapter will cover. You can also use string values wherever you need to use the NSString object.1. String literalsYou can use string literals to define string literals. The string literal is a fixed text string enclosed by a double argument.String literals can be used to provide initial values for constants or variables let somestring = "a string literal";Note Swift can tell that the constant somestring is a string type, because we used string litera

Boolean value Swift has a basic Boolean type, called Boolean (bool), and a Boolean value called a logical value (logical), because it can only be true (true) or False (false). Swift provides two Boolean constant values: True,false: 1 Let orangesareorange (oranges are oranges) = True2 Let turnipsaredelicious (turnip is delicious) = False Orangesareorange and Turnipsaredelicious are inferred as Boolean typ

How do I use Swift for network requests?We first create a swift project, the project name is SwiftdemoThen create a new OC class in the project, and Xcode will ask if you are creating a Swiftdemo-bridging-header.h file that bridges OC and SwiftSelect Yes to generate the project name-bridging-header.h file, in which we introduce the OC framework corresponding to the header file can be implemented in the

subscript may be too small or too large. -You need to input a value to the function, but the invalid value may cause the function to fail to run normally. -An optional value is now nil, but a non-nil value is required for subsequent code execution. Okay, the above is all about Swift's first chapter. The basic part is the basics. The links to all translated articles in Chapter 1 are as follows: Swift learning-

Swift's compatibility with objective-c allows you to use both languages in the same project. You can use this feature called mix and match to develop a mixed-language application that can implement part of the app's functionality with the latest features of Swfit and seamlessly incorporate into existing objective-c code.Mix and Match OverviewObjective-c and Swift files can coexist in a project, whether the project was originally based on objective-c o

jump out of switch.In the for-in syntax, you can access each entry in the dictionary in the form of a key-value pair (that is, traversing the dictionary).Let interestingnumbers = ["Prime": [2, 3, 5, 7, 11, 13],"Fibonacci": [1, 1, 2, 3, 5, 8],"Square": [1, 4, 9, 16, 25],]var largest = 0For (kind, numbers) in Interestingnumbers {For number in numbers {If number > largest {largest = number}}}Largest　　Experiment//Exercises　　ADD another variable to keep track of which kind of number is the largest,

1.swift Create TableView Two classes Viewcontroller and Secondviewcontroller in this example2. Create a navigation bar in Appdelegate, initialize with the view Code 1 func application (application:uiapplication, Didfinishlaunchingwithoptions launchoptions: [Nsobject:anyobject]?) -> Bool { 2 // Override point for customization after application launch. 3 let Vc:viewcontroller = Viewcontroller () 4 let NAVIGATIONVC = Uinavigationcontroller (r OOTV

Infix syntax is a kind of OC Ritter, which is to add an explanatory word to the arguments of the function, so that the meaning of the parameter is understood when the call is made.Like what:-(void) Processdatawithparamaa: (NSString *) Paramaa paramab: (NSString *) paramab{}When called: [Self Processdatawithparamaa:@ "A" paramab:@ "B"];But you find that, this infix syntax is the premise that you must be in the first name of the function, write a with what the name of a parameter, or the first

The most classic example of learning a new language is the output "Hello world! ”Print ("Hello world!　　") This is how swift is exported.If you have used other languages, then it seems to be very familiar. But it's a lot easier than some c.1, do not need to import some separate libraries, such as input/output or string processing function of the class library,2. Code that does not need to be written at the global scope is used as an entry point program

ADD This code to your project and comparing dates is easier than everExtended NSDateextension nsdate{func isgreaterthandate (datetocompare:nsdate)-Bool {varIsgreater =false ifSelf.compare (datetocompare) = =nscomparisonresult.ordereddescending {isgreater=true } returnIsgreater} func islessthandate (datetocompare:nsdate)-Bool {varIsless =false ifSelf.compare (datetocompare) = =nscomparisonresult.orderedascending {isless=true } returnIsless} func addDays (daystoadd:int)-NSDate {varSecondsinday

Optionals Selection The selection (as if not translated in this way) is applicable to situations where values may be null. There are two options for one selection: The value is equal to or equal to X, or the value does not exist. The concept of selection is not in OC and C. The closest concept in OC is that the return value in OC is the function of the object. If the object does not exist, nil can be returned, however, nil can only represent objects. It cannot represent basic types, struct type

Swift 2.0 Study Notes (Day 13)-integer and floating-point data types, swift Study Notes For Original Articles, please reprint them. Reprinted Please note: Guan Dongsheng's blog Swift provides 8, 16, 32, and 64-Bit Signed and unsigned integers. These integer types follow the naming conventions of the C language. I have summarized the integer types in

Swift protocol and swift Protocol The protocol in Swift is also called in object-c, but in other languages it may be called Interface (such as java) or pure virtual function. In fact, it all means. The Protocol is mainly used to define uniform methods and attribute names, but does not implement any functions. Only the classes that implement the Protocol need to i

Swift custom control-input box and swift control input box When developing Android projects, common functions are often encapsulated into controls. One is to reduce the amount of code, the other looks concise, and Apple development also prefers to encapsulate them into controls, then drag and drop in the storyboard. for IOS development, the code quality is not very high because it belongs to the cainiao lev

Swift string search and Swift string SEARCH Var test = "11111111111 test" If (string. rangeOfString ("test ")! = Nil) // note! = Left and right Spaces { Println ("find ") } If you want to obtain the location, you can: Var t = string. rangeOfString ("test ") Start position T ?. StartIndex End position T ?. EndIndex In addition, add a method, google's Let string = "hello

Swift? And! Swift understandingSwift? And! Understanding The Swift language uses var to define variables, but unlike other languages, Swift does not automatically assign an initial value to the variables, that is, the variables do not have a default value. Therefore, you must initialize the variables before using them

Last night Apple unveiled a new generation of programming languages Swift, which officially provided a ibook documentation. There is a need to be able to see.Address: https://itunes.apple.com/cn/book/swift-programming-language/id881256329?mt=11The following I first say some of the main things, we are just looking, so I will inevitably appear to understand the wrong place. Welcome to point out. Of course you

OC Project introduced to Swift,1. Build Bridge File: Create a new Swift file in the OC Project and confirm the creation of a project name-bridging-header.h file.2, after building the bridge file, import the file name to be used in itFor example when using Charts: @import Charts;Charts: Various statistical graphs (pie chart, line chart, histogram, etc.) tools, smooth and easy to use, effect to force.3, in th

Start Xcode6 from Launchpad and select "Create New Project":650) this.width=650; "class=" Alignnone wp-image-548 "src=" http://blog.diveinedu.net/wp-content/uploads/2014/06/new _project.png "alt=" New_project "width=" 529 "height=" "style=" margin:5px 20px 20px 0px;padding:0px;border:0px; Font-family:inherit;font-size:inherit;font-style:inherit;font-variant:inherit;font-weight:inherit;line-height: Inherit;vertical-align:middle;height:auto; "/>As you can see, the

In order to simplify the swift language, the pointer is cloaked. There is no "*" like that in OC. Give the underlying question to the C language, and we can call the C language in Swift to solve it. Of course, OC can also be called.However, in some scenarios, this invocation may not be very convenient. For example, based on the parsing of the byte stream, the data we receive is parsed, and pointers may be u