Swift

Screen shot 2016-09-22 12.00.37.pngSelect CoreData to the right, there is a language option, select the type of language you want, and then clickScreen shot 2016-09-22 12.02.02.pngSelect Create Nsmanageredobject subclass on the upper editor.Classes

var//represents variable, variable value can be changedlet//represents a constant type that cannot be changedvar ceshi:Double = 10//If the declared variable is not changed, Swift will also prompt to change it to let, and the variable in the

////Viewcontroller.swift//Use of date////Created by think Peng on 16/9/20.//copyright©2016 of the year. All rights reserved.//Import UIKitclassViewcontroller:uiviewcontroller {Overridefunc viewdidload () {super.viewdidload ()///1. Get the current

An introduction to array arrays An array is an ordered set of elements of the same type The collection elements in the array are ordered and can recur Arrays in Swift The swift array type is an array and is a generic

1. Code format1.1 Use four spaces to indent.1.2 A maximum of 160 characters per line to avoid a long line. (Xcode->preferences->text editing->page Guide at column: set to 160)1.3 Make sure that there are blank lines at the end of each file.1.4

Two new access control permissions Fileprivate and open are added in Swift 3. These two new access controls are described in detail below.FileprivatePrivate in the original Swift is not really private, and if a variable is defined as private, other

Swift is now using more and more, and some of the mainstream frameworks or better-performing demos have been written using Swift. So, learn how to invoke Swift in an OC project.The main use of a bridge file, this bridge file usually when you import

After sifting through the cocoapods, this is a better and more useful arrangement.If necessary, you can enter it on the pods command side:Pod Search XML　　This will search for a number of third-party libraries related to XMLSwiftyxmlparser is an XML

In OC, there is no absolute private and can be removed with runtime.In swift, there is absolute private, with private decoration, is unable to take out.Here's how swift gets the class properties://Person.swift//Import UIKitClass Person:nsobject {var

The array in Swift is denoted by []1. Create an empty arrayLet Emptyarr = [String] ()Let emptyArr1: [NSNumber] = []Both of these methods can be2. Accessing elementsvar numarr=["1", "2", "3"]println ("first element: \ (Test1array[0])")println ("last

First of all, you need to import the third-party library into your project to specifically how to import this is not the focus of this articleNot much nonsense directly on(1) Build an OC controller directly in the project and Xcode will remind you

Official website: http://snapkit.io/Github:https://github.com/snapkit/snapkitSnapkit is a DSL-to-make Auto-Layout easy on both IOS and OS x. Simple & Expressive Chaining DSL allows building constraints with minimal amounts of code while

Cow B's swift screen rotation experience Terminator (OC Unified Thinking)1, Appdelegate(1) define variable var Blockrotation:bool = False(2) Definition methodSwift CodeFunc application (application:uiapplication,

When do I use assertions?Use assertions when the following conditions are included:1. When an integer subscript index is passed as a value to a parameter implemented by a custom index, but the subscript index value cannot be too low or too high, use

OneGrammatical features: reference to OC, C #, JavaScript, Rython and other language featuresIt also has the high performance of the compiled language and the flexibility of the scripting language . The code is simple,can be easily mixed with OC, C (

/*: Functions: * functions are separate blocks of code that are used to accomplish a particular task. You give a function a proper name to identify what the function does, and when the function needs to be executed, the name is used to "invoke" the

Array (set of ordered data)* Format: []/[INT] ()/array()*Let immutable variable group*var variable array Note:*It is good practice to create immutable collections when you do not need to change the collection. So Swift compilers can optimize the

function target Mastering the definition of a function Mastering the usefulness of external parameters Mastering three function definitions with no return type Code implementation Definition of a function

Change of listening properties In OC we can override the Set method to listen for changes in the properties In swift, you can listen to and respond to changes in property values through property observers This is typically a change

Introduction to constructor constructors for classes The constructor is similar to the initialization method in Oc: init method When a class is created by default, A constructor is inevitably called Even if you do not write any