Swift

1. Enumeration　　 Create an enumeration with enum-note that the enumeration of Swift can be associated with methods: enumRank:int { CaseAce =1 CaseThree, four, Five, Six, Seven, Eight, Nine, Ten CaseJack, Queen, King func simpledescription

The top of a variable, if not initialized, is not practical, Swift will error.Visual objects must also be new before they can be used.This is another way I agree with Apple.Swift is really good!If the variable is declared as an optional value, the

Again a big dream, also can not resist you like to insist!I ran and ran, just to catch up with the expectations of their own.Third, operator + expressionSwift allows overloading of operators, such as "+" you can overload itFollow-up details will be

1. Requirements: Use the proxy to achieve the reverse value (example using the button in the second view controller to change the contents of the first View Controller label)One, the first interface1 classViewcontroller:uiviewcontroller,

You can use the optional option when the value may have a default condition. This means: There is a value that can be equal to the specific value of an X, or it may not have a value.Note: There is no such concept as an optional value in C or

//Viewcontroller.swiftUiimageview and UIImage//Created by Mac on 15/4/12.Copyright (c) year BSY. All rights reserved.//Import UIKitclass Viewcontroller:uiviewcontroller {Override func viewdidload () {Super. Viewdidload () // loading of local

Swifthttp package is a third-party HTTP library under iOS official address: Https://github.com/daltoniam/SwiftHTTPProject development If you want to use a third-party library, you need to use CocoapodsEnvironment ready: Update Ruby gem into terminal,

1 //Playground-noun:a Place where people can play2 3 ImportCocoa4 //functions and closures5 6 //function, declare the function using the Func keyword:7Func greet (name:string, day:string)String {8 return"Hello \ (name), today is \ (day)."9

Headfirst design mode This book is very good and ready for one months to finish. The book speaks very clearly.Design principles:1. Find out where changes may be needed in your application, separate them, and don't mix with code that doesn't need to

One, the tuple type is N any type of data composition (n>=0), the data that make up the tuple type can be called "element"Two, the definition of the tuplesuch as: let position = (X:10.5,Y:20)//Two elements of a tupleLet person = (name:

Object Type Instance Store property static Storage Property Instance calculation property static Computed propertySupport support is not supported for class support      Structure                        Support                           Support     

Swift uses Baidu Map API encountered before the pit on Android used Baidu map, thought probably similar, also did not carefully read the document, the results of their own pit the attention matters, http://developer.baidu.com/map/index.php?title=

[Uiimageview Setimagewithurl:]: Unrecognized selector sent to instance solutionThe first time configuration, because Baidu took the tutorial, so one-time successResults The second time did not go to Baidu, the result is tragic, and then find the

1, characterIn the C # object language, characters are placed between single quotation marks ('), but in the swift language, characters must be placed between double quotation marks;(1) Unicode encodingUnicode encodings can have single-byte

1. Build a Tabbarcontroller three Navigationcontroller three Viewcontroller2. Add the code after initsubviews in the Sliderviewcontroller file:// load the Maintab with Maincontentview var maintabvc:uitabbarcontroller! = self.storyboard!.

For a project on hand, I need to use the HMAC function in the Commoncrypto library. Although Apple has provided many system libraries in Swift, Commoncrypto is not in it. Fortunately, it's not much of a bother to use this library, just a little

Recently in the study of the available third-party icon controls, and then after searching the web, the feeling is more powerful is Coreplot , so began to study how to deploy to the program. Online about this aspect of the tutorial relatively few,

Sometimes our page is very large need to scroll only with scroll bar scrolling can be less precise, this need to use page Control, as we usually operate the iphone, each page has some apps, the number of pages is marked with small dots, each time a

Switches we are familiar with, usually in the use of the iphone is often encountered, mainly used in the program to turn on or disable a setting. Its properties are relatively simple:Status state: Open or closeWhat's the color when it's open?What

In the first few words we took care of the layout, this word we have to add all the references, is connected to the controllerUiviewcontroller { @IBOutlet weak var textfield1:uitextfield! @IBOutlet weak var web1:uiwebview!Then the agent, first