Swift

Import Foundation//mark:-------Enumeration Syntax-----------//Not like C and objective-c. Swift's enumeration member will not be given a default integer value when it is created enum compasspoint{case, South case, West}enum planet{case Mercury,

In Swift development, a new subclass of UITableViewCell was created: Customeruitableviewcell, "No such module ' Cocoa ' ERROR:The reason is simple: when you create a new file, you select the "OS X" project, and you should select the "IOS" project.

　　Tuples (tuples)　　Tuples is the value of combining multiple single values into one composite. It can contain any type of value, and it does not need to be the same type.I. Creation of tuples1.Let Http404error = (404,"notfound! " =

in the Swift Programming (http://www.maiziedu.com/course/ios/16-161/) , we all encounter these two questions, how to turn characters into classes and code to create a control method, the following specific explanation of these two points of

The SDK,SDK of the map class must not meet the needs of developers, so developers have to customize, because the official is also the object-c version of the syntax, it has to be translated into Swift syntax to meet the needs of the project.Create a

Lazy Loading Lazy loading is ubiquitous in IOS development Lazy loading format is as follows: var person: Person = { print("懒加载") return Person()}() Lazy loading is essentially a closed package The

Definition of closures Define a function //: 定义一个 sum 函数func sum(num1 num1: Int, num2: Int) -> Int { return num1 + num2}sum(num1: 10, num2: 30)//: 在 Swift 中函数本身就可以当作参数被定义和传递let mySum = sumlet result = mySum(num1: 20, num2: 30)

Control Flow If There is no concept in the C language in Swift 非零即真 must indicate the specific condition of judgment in the logical Judgment truefalse The IF statement condition () can be omitted But {} you can't omit it.

String In the vast majority of cases in Swift, it is recommended to use String type String is a struct with higher performance String currently features most of the NSString String supports direct traversal

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Definition of a function Formatfunc 函数名(行参列表) -> 返回值 {代码实现} Calllet result = 函数名(值1, 参数2: 值2...) func sum(a: Int, b: Int) -> Int { return a + b}let result = sum(10, b: 20) A function with no return value, a total

1 IsEmptyReturns a Boolean value that determines whether the string is empty 2 Hasprefix (prefix:string)function to check whether the given argument string is prefixed with string 3 Hassuffix (suffix:string)

Language has a point of thinking, whether it's C, OC, Swift, Java 、、、 When I get a new skill in the door, sometimes we find that it's like the main predicate, verb, noun and adjective in English. Swift is an easy-to-use programming

ClassViewcontroller:Uiviewcontroller {OverrideFuncViewdidload() {Super.viewdidload ()In Swift () instead of alloc/init in OCLet V =UIView (frame:CGRect (x:0, y: 20, Width: 100, Height: 100)) //[Uicolor redcolor]; v.backgroundcolor = uicolor.redcolor

Optional Optional Types 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

1. Stored Propertyegvar number:int = 02. Computed Propertyegvar area:double {get {Return width * height}...}The complete code is as follows:classRectangle {var width:double=0.0var height:double=0.0var area:double {//Computed Getter Get {

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Swift 2.2 was released. Support for Linux platforms. Swift is a common programming language built using modern security design and software design patterns. The version language is updated as follows: Se-0001:allow (most) keywords as

3.30 See the video to learn the two-dimensional code simple implementation and some of the implementation of the animation to record the simple implementation of QR code scanning today is not very good to remember the basis of the study is to

Swift is a type-safe language and is also based on the C languageSome types of C language are also practical, but the difference is that Swift declares variables and constants to be differentLet: used to modify constants, Var to modify