Objective-C

Overview: The array inside OC is a linear structured data type, within the foundation framework. Divided into mutable arrays (Nsarray) and non-variable groups (Nsmultiarray), where MultiArray inherits from Nsarray, so Nsarray's

This article turns from http://blog.csdn.net/addychen/article/details/39525681Use objective-c for some time, has not been clear in the Objective-c attribute and instance variables, here summarizes, objective-c in the first instance variable, needs

First, the basic conceptPolymorphism in the code embodiment, that is, a variety of forms, must have inheritance, no inheritance is not polymorphic.When polymorphic is used, dynamic detection is performed to invoke the real object method.Polymorphism

Pre-preparation for OC languageI. INTRODUCTION of OCOC language on the basis of the C language, the addition of a layer of the smallest object-oriented syntax, fully compatible with the C language, in the OC code, can be mixed with C, or even C + +

At present, mobile development in the buzz, today at home to learn the recent "Objective-c Basic Tutorial", the initial feeling objective-c and. Net difference is very big, in order to better understand objective-c, will take note of the form of

A preface to the reflection mechanism of objective-c from the perspective of JsonmodelIn the era of mobile interconnection, JSON is almost ubiquitous as a data transmission format. As an iOS developer, how do I get a string of JSON strings to handle?

One, Objective-c polymorphic1. Concept: Same interface, different implementationsFrom different classes you can define methods that share the same name.Dynamic typing enables the program to determine the type of the object until it is

Createfileatpath//Create File Nsfilemanager *FM = [Nsfilemanager Defaultmanager]; NSString *strpath = [NSString stringwithformat:@ "%@/file1.txt", Nshomedirectory ()]; NSString *strdata = @ "Test"; BOOL BRET = [FM

Objective-c Learning Journey The third Chapter OBJECTIVE-C class declaration, definition, instance, initialization class declaration// The compile-processing instructions for the class declaration begin with @interface, ending with @end, where

Like any other programming language, in order to learn more deeply, it is necessary to understand the data types and qualifiers of the gate language. The data types of OC are as follows:(1) Int: integral type; int A;     int b=2; int c=a;(2) Float:

Objective-c the ProtocolProtocol In a nutshell, a list of methods that are declared can be implemented by whatever class, usually called (delegation) mode.In iOS and OS X, Apple uses a number of proxy modes to implement view (UI controls) and

Explain:The Nsarray class has two restrictions. First, it can only store objective-c objects, not the original C-language underlying data types, such as the random pointers in int, float, enum, struct, and Nsarray. Also, you cannot store nil (0 or

Example one (similar to c)//1. Code Writing//like the C language, the entrance to the OC program is still the main function, except that it is written in a. m file. For example, here is a main.m file (the file name can be Chinese)#include intMain ()

OBJECTIVE-C code block multiple concurrency1. The code block object is an extension of a function in the C language, except for the code in the function, which also contains a variable binding, and the code block is sometimes called a closure2. The

OBJECTIVE-C 2.0 adds the class extension to solve two problems: A private read-write property can be declared, whereas a public read-only property with the same name in the declaration of a class is supported to expose read-only,

An array of objective-c is more powerful than an array of C++,java, and Nsarray saved objects can be different objects. But can only save objects, int, char,double and other basic data types can not be saved directly, you need to convert to an

First, look at the typical nsstring and Cfstringref conversions.http://www.tuicool.com/articles/MJRr226Cfstringref to nsstring *nsstring *yourfriendlynsstring = (__bridge NSString *) yourfriendlycfstring; //NSString * to Cfstringrefcfstringref

1.info.plist Common Settings* After building a project, you will see a "project name-info.plist" file under the supporting Files folder, which is very important for the project to do some run-time configuration, and cannot be deleted.* In the

Understanding Method Swizzling is a good opportunity to learn the runtime mechanism. Not much to do in this, only translated by Mattt Thompson published in Nshipster's method swizzling article.Method Swizzling is a technique that changes the actual

A large number of objective-c developers have emerged in the past few years. Some are transferred from a dynamic language, such as Ruby or Python, some of which are transferred from a strongly typed language, such as Java or C #, and, of course,