Swift

A delegate is a design pattern that allows a class or struct to pass on (or delegate) some of the functions that require them to other instances of the type. The delegate pattern is simple: Define protocols to encapsulate the functions and methods

////Main.swift//LEETCODE02////Created by Guola on 16/1/21.//copyright©2016 year Guola. All rights reserved.//import Foundationfunc input ()-String {let keyboard=nsfilehandle.filehandlewithstandardinput () let Inputdata=Keyboard.availabledata Let

viewcontroller.swift// mylearn//// Created by liuxing on 16/1/17.// Copyright (c) 2016 MYHASPL. All rights Reserved.//import Cocoaclass Viewcontroller:nsviewcontroller { var nowvalue:bool=true Override Func viewdidload () {

ObjectiveUIView not like UIButton added Click event will have a click effect, experience is much worse, here respectively through customization and extension to achieve similar UIButton effect.StatementWelcome reprint, but please keep the original

A cyclic strong reference can also occur when you assign a closure to an instance of a class instance, and this class instance is useful in this closure. This closure weight may have accessed a property of the instance, such as self.**, or a method

UIWebView's syntax in Swift is not the same as OC, but the way it is used has evolved from OC. For example, all have to have the Init method, all have Loadrequest method, so, with OC This foundation, learning Swift is a very easy thing.This matter

The development process is likely to be swift immature place with mature OC code to make up, the following simple to learn, I also follow the video learning show off is not a study note, specific problems or specific analysis it.Need to add

The operator defined in C can be used for a type or an actual variable and return its size size_t in memory.In cocoa, we typically use the data to pass in the length of the array when generating nsdata. Because in OC, the C operator of sizeof is

Swift is still up to date, with every update being updated, and some of the old versions of Swift are not applicable in new Swift, and new versions of Swift add new features. So far, Swift is version 2.1. The swift books translated last year are

? Github-ios (Chinese summary of hundreds of GitHub development frameworks and complete apps)Http://github.ibireme.com/github/list/ios/? Many excellent iOS, MAC open source projects Https://github.com/Tim9Liu9/TimLiu-iOS? iOS open Source Library

1. Use the Type check operator ( is ) to check whether an instance belongs to a particular subtype. If the instance belongs to that subtype, the type check operator returns true , otherwise returns false .2. A constant or variable of a type may

1. You can rewrite an inherited read-only property as a read-write property, just provide the getter and setter in the overridden version's properties. However, you cannot override an inherited read-write property to a read-only property.2. You can

Many students ask optional? And! Difference, to figure this out, let's first look at the optional syntax in SwiftThe swift language uses VAR to define variables, but unlike other languages, Swift does not automatically assign an initial value to a

1, Title: Determine how many primes between 101-200, and the output of all prime numbers.for (var i=101; ivar m=2for (m; mif (i%m==0) {Break}}if (m>=i) {Print (i)}}2, Title: Suppose there is an array of learning scores, using the nesting of

The swift language uses VAR to define variables, but unlike other languages, Swift does not automatically assign an initial value to a variable, which means that the variable does not have a default value, so it must be initialized before it is

Novice Practice Swift Version TableViewViewcontroller.swiftSwift_lianxiCreated by Dllo on 16/1/7.COPYRIGHT©2016 year Z_han. All rights reserved.//Import UIKitClass Viewcontroller:uiviewcontroller, Uitableviewdatasource, uitableviewdelegate {var

There is no concept of macros in Swift, so how can we use the macro function in Swift to improve efficiency?One, using the keyword let to declare a constant to store the corresponding value, the following code declares a constant MyColor to store a

Class rect{private struct swidth{static var width:int = 0}private struct sheight{static var height:int = 0}Internal class Var width:int{get{Return Swidth.width}set{Swidth.width = newvalue}}Internal class Var height:int{get{Return

Swift's use of functions is really flexible. But the individual feels more flexible or closed.The concept of swift closures is probably equivalent to the concept of OC block. If the understanding of block is very thorough, the principle of the

Immutable dictionary Letlet dicta = ["key1":"value1","key2" :"value2","key3":4]print ( dicta["key3"])The type of the key-value pair of the variable dictionary var dictionary is determined by the type of initialization time, and the type is not