Swift

In Swift's world, if we call the agreement King, then generics can be regarded as the Queen, the so-called mountain not two tigers, when we combine the two to use, it seems to encounter great difficulties. So is there a way to combine these two

1.Git hit tag:The order is two below, and it will be a look.2. String Turn Model:jsondecoderHttp://www.cocoachina.com/ios/20180612/23771.html3. Delay two seconds to execute:Let Delaytime:timeinterval = 2.0//Delay two seconds after

Namedclass: Static type, directly associated with type implementation, can be used for initialization, type checking, and so on.Namedclass.self: @thick, desensitization (off-off) type, dynamic type, can be used as an instance of meta-type, can be

Effect: Img_f08dabe063a6-1.jpegClass Disclamerview:UIView {@objc weak var vc:uiviewcontroller?Custom protocol @IBInspectable var diy_protocol:string ="Diyprotocol"Hyperlink Address @IBInspectable var disclamerurlstr:string =" "Terms, Disclaimer

One, Concept:The responsibility chain model (Chain of Responsibility pattern) creates a chain of recipient objects for the request. This mode gives the requested type, decoupling the sender and receiver of the request. This type of design pattern

Objective Data types in Swift are categorized into reference types (classes) and value types (enumerations, structs). The reference type is stored on the heap, and the value type is stored on the stack. Swift manages

Classes, structures, and enumerations can define subscripts, which is shortcuts for accessing the Member element S of a collection, list, or sequence.The subscript is in the same form as the function, and set and get are the sameSubscript (row: int,

First, the data type1, the basic type of packageSwift provides its own versions of all fundamental C and objective-c types, including for Int integers, Double and Float F or floating-point values2. New TypeSwift introduces advanced types not found

There are two main ways to connect strings:1. Add a string directly after the string; use + in Swift to stitch strings together directly. Such as:Let str = "Hello"Let str2 = "world!"Let STR3 = str + str2Print ("STR3 = \ (STR3)")The output is: Hello

Reference Link: HTTPS://WWW.JIANSHU.COM/P/ADE69F95BFFC　　　　　　　　　　　　　　1 Import UIKit2 Import Corelocation3 4 classViewcontroller:uiviewcontroller, cllocationmanagerdelegate {5 6@IBOutlet weak var showlocationbtn:uibutton!7@IBOutlet weak var

Let Datef = Dateformatter() AAA is used to show morning or afternoon, mm and mm respectively, 12-hour and 24-hour systemDatef. DateFormat = "Yyyy-mm-dd aaa hh:mm:ss" Datef. Amsymbol = "Morning" Datef. Pmsymbol = "Afternoon" Let str = Datef.

1. Follow the agentUitextfielddelegate2. Setting up the agentTEXTF. Delegate = Self3. Implementing a ProxyFunc TextField (_ TextField: Uitextfield, Shouldchangecharactersin range: nsrange, replacementstring String: string), Bool { Let text =

Import UIKitClass Firstviewcontroller: uiviewcontroller, Uiimagepickercontrollerdelegate, Uinavigationcontrollerdelegate { var picker:uiimagepickercontroller! @IBAction func button (_ Sender: UIButton) { if uiimagepickercontroller.

Userdefaults suitable for lightweight local client storage, store a value, the new value can overwrite the old value, can be repeated storage, can also be stored once, and then directly from the Userdefaults to read the last stored information, very

Many people do not understand the use of optional '! ' and '? ' in the beginning of Swift, and then I talk about my understanding of how these two symbols are used.First of all, say the concept of optional, to facilitate the understanding later.

Dotone. Transform = Cgaffinetransform. Init(ScaleX: 0.01, y: 0.01) //  OptionSet, you can select multiple, for example [. Repeat,. AutoReverse] UIView. Animate (withduration: 0.6, delay: 0.0, Options: [. Repeat,. AutoReverse], animations: {

Relatively simple, the principle is not said, here only record:The code is as follows:1, preparevar pagecontrol:uipagecontrol?var myscrollview:uiscrollview?var mytimer:timer?var mycurrentpage:nsinteger?var courses= [ ["name":" First","pic":"1.

Swift Development Notes (i)When you first touch Xcode, the entire operating logic is completely different from Android studio, Visual Studio, and so on, so this article revolves around the settings of controls in iOS, registering events to get a

//Viewcontroller.swiftSwift+stringImport UIKitClass Viewcontroller:uiviewcontroller {Override Func Viewdidload () {Super.viewdidload ()The var variable let constant does not describe too muchSelf.view.backgroundColor = Uicolor.yellow;Let my:nsstring

In this section, the main focus is on the innovative selection of Swift (Optionals)I. SummarySelectable is a new type of swift innovation, first look at the optional application scenario:var errorcode:int = 404At this point the value of ErrorCode is