Swift

Recently spent time on the evil to fill the official swift The book also looked from beginning to end, although some are not very clear. But you can only take the time to study later.Okay, here we are. Learning Swift will naturally be like knowing

Maybe there's a lot of molding on the web, I just want to write it down and leave it to myself. Welcome criticism. Open up!1, the first procedure, hello,world! The Ancients Cloud, learned the hello,world! You're halfway through the language.Print

: Playground-noun:a place where people can playimport uikitvar str = "Hello, Playground" Let MAXVALUEOFUINT8 = uint8.m The range of values for axlet MINVALUEOFUINT8 = uint8.min/* int is determined by the number of bits of the computer, such as

Original link: Swift programming 101:creating self-registering Swift UI Controls Original Author: Kevin McNeish Development technology Front www.devtf.cn Translator: Kmyhy Reviewer: lastday Status: Complete For

The String 1.0 in Swift does not provide a way to convert itself directly to Int ,Float , etc., while in OC We can "123" in this way. IntegerValue to get its corresponding value , because OC and Swift string types are interlinked, so we can do

Infix syntax is a kind of OC Ritter, which is to add an explanatory word to the arguments of the function, so that the meaning of the parameter is understood when the call is made.Like what:-(void) Processdatawithparamaa: (NSString *) Paramaa

First, the callbackWe know that when we execute a function, we usually have return as the return parameter, so why do we have to return the callback?Callback is to implement the asynchronous return, in some special cases, such as your function is a

Original articles, welcome reprint. Reprint Please specify: Dongsheng's Blogoverriding instance methodsOverrides an instance method and a static method inherited from a parent class in a subclass. The override of the instance method is described

Swift has been out for a long time, has not started the study, now began to decide the system of learning.The beginning of learning in any language is grammar: 1. Note: Let is modified to be immutable var is variable let maximumnumberofloginattempts

1 Import Foundation2 3 //Array Declaration4var arr =[String] ()5 //array Loop Add Item6 forvar indexinch 0... -{7Arr.append ("Item \ (index)")8 }9 Ten //Traversal Method 1 One forIteminchArr { A print (item) - } - //Traversal Method 2 the

original articles, welcome reprint. Reprint Please specify: Dongsheng's blog Swift inheritance can only occur on a class and cannot occur on enumerations and structs. A class can inherit a method, property, subscript, and other characteristics of

In iOS development, if you do not properly encapsulate, use protocols or inherit classes to develop, you will encounter the legendary Viewcontroller (hereafter referred to as VC) Hell problem ...For example, in order to invoke the interface in the

One, the first interfaceCreated by Qin Zhiwei on 14-6-13.import uikitclass Zwrootviewcontroller:uiviewcontroller {Init (nibname nibnameornil:string?, bundle Nibbundleornil:nsbundle?) { Super.init (Nibname:nibnameornil, Bundle:nibbundleornil)

Error message for console printing:Application Transport Security has blocked a cleartext HTTP (http://) resource load since it is insecure. Temporary exceptions can be configured via your app ' s info.plist file.After the iOS 9 update, Apple

Swift uses an automatic reference count (ARC (Automatic Reference count)) to manage the memory usage of the application. This means that memory management is already part of Swift, and in most cases you do not need to consider memory management.

Original articles, welcome reprint. Reprint Please specify: Dongsheng's BlogThe main function of the constructor is to initialize the instance, which includes initializing the storage properties and other initialization. In a rectangle class or

Swift 2.0 Study Notes (Day 37)--default constructorsOriginal articles, welcome reprint. Reprint Please specify: Dongsheng's BlogInstances of structs and classes call a special Init method, called a constructor, during construction. The constructor

Before we talk about Swift's function type, let's recall what we've learned about defining a swift function.Func Add (a:int,b:int), Int { return A + B}Okay, let's start with the explanation of our function type.The type of the above function is

Because Playground itself holds all the things that are declared in it, the sample code in this section needs to run in the Xcode project environment. The correct results may not be available in the Playground.In any language, the content of memory

A class can inherit (Inherit) another class's methods (methods), attributes (properties), and other attributes. When a class inherits from another class, the inheriting class is called the subclass (subclass), and the inherited class is called the