Swift

For Loop-Traditional*for parentheses can be omitted*You can only use BOOL as a conditional statement*If only the curly braces for the after of the instruction for ' cannot ' be omitted*the three arguments after the for can be omitted, and if the

Optional type * Optional type indicates that a variable can have a value or no value * C and objective-C do not have an optional type concept * Only optional types in Swift can be assigned nil* If you declare an optional constant or variable but are

Table (TableView) is indeed a very useful control, now to implement an editing feature implementation, including adding and deleting, deleting include long press DELETE and left slide deleteAs follows:The specific code is as follows:1, create the

var data:nsarray!var scrollview:uiscrollview!var pagectrl:uipagecontrol!Override Func Viewdidload () {Super.viewdidload ()Instantiate TableViewLet Tableview:uitableview = UITableView (Frame:self.view.bounds,

1, Label creation 12345678910 importUIKitclassViewController: UIViewController{    overridefuncviewDidLoad() {    super.viewDidLoad()    //设置标签x坐标：10，y坐标：20，长：300，宽：100    varlabel=UILabel(frame:CGRectMake(10,20, 300, 100))    label.

1, the creation of the text box, there are several styles:uitextborderstyle.none: No Border Uitextborderstyle.line: Line Border uitextborderstyle.roundedrect: Rounded Rectangle border Uitextborderstyle.bezel: Edge + Shadow 1234=

1. Createvar imageView = Uiimageview ()// initialization2, the picture display and the picture change" Hgl.jpeg " = CGRectMake (self.view.addSubview) (ImageView) 3. How to get Pictures(1) Get from file directoryUsing the NSBundle class(2) Get from

Defining enumerationsEnum Mapdirection {Case NorthCase SouthCase EastCase WestFunc simpledescription (), String {Switch Self {Case. North:Return "North"Case. South:Return "South"Case. East:Return "East"Case. West:Return "West"}}}Using

Mac Terminal uses Swift REPL exception handling methodThe terminal uses the Swift command to appearWarning:swift Error in module Libmarisa.dylibdebug info from the This module wi ...WorkaroundFirst, convert the catalogsudo xcode-select -s

One, create the control, and listen to the control selection value/*options In addition to the text can also be the image as the keyword function is literally: type conversion*///Let items = ["Option One", "option Two", UIImage (named: "Hgl.jpeg")!]

Unlike classes in Objective-c, the Swift class does not have native support for KVO, but you can easily accomplish the same goal with a property observer on a type-safe basis.In any case, classes derived from the NSObject class are supported KVO,

Defining enumeration methods an enum Season {//Each case defines an instance of the Spring cases Summer-Fall-the-winter}//definition enumeration mode two enum WEEKDA Y {//Use a case to list all enumerated instances cases Monday, Tuesday, Wednesday,

These basic content basically already can build the project frame, the rest is some optimization, detail and data request question, slowly update ....To create a method in AppdelegateCreate method Execution UitabbarcontrollerFunc Createtabbar (){Let

First, the website:0. Swift Learners ' resource sharing1, Swift Apple official website: Swift-overview2. Swiftist:home-swiftist Community3. Swift Chinese Guide4, together Swift:let ' s swift-domestic first swift Chinese course5. SWIFTV Classroom:

Showwebview.datadetectortypes =. None//Swift disables webview for numbers, links, dates, addresses, phone numbers in H5its Uidatadetectortypes property:Staticvar phonenumber:uidatadetectortypes {Get}//Phone Number Detection Staticvar

In iOS programming, we often talk about proxy agents, which is delegate, so what is a proxy?Let's take a look at Cocoa's description of it:Delegation is Cocoa's term for passing off some responsibilities of a object to anotherName implies:An agent

The optional default value for 1.var isLet is no default value2. Optional Judgment:The 1> if let system will define a variable to record him, just use it in {}, or you can make continuous judgments using ifFor example: if let on = One,let to = two{}2

SWIFTX study 031. Creating an object is just the class name ()2. Add navigation bar Let Nav = Uinavigationcontroller (rootviewcontroller:home)3. Add a sub-controller for Uitabbarcontroller Addchildviewcontroller or viewcontrollers4. Tabbar is a

Single-Case modeThe singleton pattern is the simplest of the design patterns, and even some schema masters do not call it a pattern, calling it an implementation technique, because the design pattern emphasizes the abstraction of the relationship

During OC development I used a third-party AutoLayout library called Masonry, and after turning to Swift found that although Swift can be mixed OC, but always feel a bit of trouble, found on GitHub, this is called Snapkit third-party library, found