Objective-C

This translation is exclusively licensed to SWIFTGG Original link: objective-c pointers and Swift 2: A Simple Guide Original Date: 2015/08/23 Translator: Mmoaay Proofreading: NUMBBBBB Finalized: Shanksyang This article

Objective-c is an Apple software programming language that wants to learn, debug, and have an integrated development environment (IDE) handy. There are three types of methods for building OBJECTIVE-C's integrated development environment:1) using the

Thread synchronization is implemented in 1,objective-c:Mutexlock (mutex), Nscondition Lock (conditional lock) Message delivery2,UDP and TCP:TCP: Transmission Control Protocol, which provides connection-oriented, reliable, point-to-point

Double, float types often have unpredictable problems when you need to calculate accurately in iOS:During debugging, you can see that the Doule type D3 the value is not expected to be 9999.99 during the calculation.If important data, such as amounts,

First, you need to figure out what the class is and what the object is. (To make this clear, let's start with a chestnut: examples of objects, such as: Human is a class; a person is an object; you are an instance; the instance itself is an object.)

1 #import2 #import "IOSProgrammer.h"3 #import "JavaCodingMonkey.h"4 intMainintargcConst Char*argv[]) {5 @autoreleasepool {6Javacodingmonkey * Javacodingmokey =[[Javacodingmonkey alloc] init];7 [Javacodingmokey Writejavacode];8 9Iosprogrammer

After exposure to the open source project masonry, I am interested in the chained notation of the layout constraints, as follows: 1 2 3 4 5 6 7 8

Navigation:Basic data TypesObject TypeID Type1. Basic Data TypesThe basic types in objective-c are the same as the basic types of C, mainly:Int,long,float,double,char,void,boolAnd so on. It is important to note that in the Foundation framework, the

first, the difference between the @dynamic and the @synthesize @property has two corresponding words, one is@synthesize, one is @dynamic. If @synthesize and @dynamic are not written, then the default is @syntheszie var =_var; The semantics of

In the MRC environment, assuming that the Ctroom object is a member variable of Ctperson, it should be noted that the code is as follows when modifying the Ctroom object:-(void) Setroom: (Ctroom *) room{It is necessary to determine whether the new

When you define a class in Objective-c, you can also use a public, private, similar to C + + to decorate member variables, as follows:[CPP]View Plaincopy @intterface  test:nsobject{      @public   int  i;   INTJ;

runtime abbreviation. is the system at the time of the operation of some mechanism, the most important is the message mechanism. For the C language, the function's call will decide which function to call at compile time (see here for the C-language

Runtime: Run-time mechanismThe first thing to understand:1. What is1> runtime is a relatively low level of pure C language API, belongs to 1 C language Library, contains a lot of the underlying C language API2> usually write the OC code, in the

As a result of the recent entry, the company arranged to study freely, so there is time to effective OBJECTIVE-C 2.0 a book to study again. As a result of the narrow personal knowledge, some of the contents of the book can not be understood

The main operations of Nsarray immutable strings are: Create, enumerate, sort, and convert to NSStringAttention:Nsarray can save objects, cannot save basic data type, struct, array, pointer, nil, NULLNsarray with nil as the end identifier.Nsnull can

13.1 protocolFormal agreement: a list of names that contain methods and properties.Attention: After adopting the protocol, the class will implement all the methods of the protocol. Typically, a protocol has only a few methods that need

Traversal of a collection1.for Loop traversal2. Enumerator traversal1Nsarray *enumarray = @[@"CM",@"PL",@"Lina",@"NEC"];2 //creates an enumerator that is attached to an array3Nsenumerator *rator =[Enumarray Objectenumerator];4 //Create an Object5 ID

Single caseand other languages of the singleton production is not much, can be said to be the simplest of a design pattern. But there are a few points to note that a singleton is just one instance of a class.So we're going to try to stop this class

Overview NSNumber and Nsvalue are used for boxing purposes, and the basic types of data are loaded into objects. The information given in the official documentation is clearly stated:/*nsvalue.hcopyright (c) 1994-2014, Apple Inc. All rights

Benefits of Encapsulation: Filter for unreasonable values The assignment process inside the Shield Let the outside world not pay attention to the internal details Benefits of Inheritance: Do not change the original