Objective-C

#import int main (int argc, const char * argv[]) {@autoreleasepool {///////// Read the file;//1. local files; 2. network file;//path class NSString *string11 = @ "http://www.baidu.com"; Network path, should be read according to

OBJECTIVE-C data types can be divided into: basic data types, object types, and ID types. The basic data types are: int, float, double, and char types. The object type is the type of pointer declared by a class or protocol, such as:

the objective-c development language is an object-oriented programming language thatexpands C , which is used for IOS Developmentobjective-c Language , but recently Microsoft revealed Objective CNewTechnology, its latestIDE Visual Studiocan

OC ArrayNsarray is a static array, that is, it points to the content is immutable, it points to a memory area, once initialized, it can not be used to modify the memory area of the data, but it is able to read the data.Nsmutablearray is a subclass

AssociationAssociation refers to associating two objects together so that one of the objects is part of another object.The affinity attribute is only available on Mac OS X V10.6 and later versions.Add extra storage space for a class beyond the

Knowledge points1. Introduction to ClassesA class is the type of an object that is an instance of a type.Instance variables: Used to distinguish between different objects of the same class, which are used to describe objects. Instance variables can

IntroductionThe Objective-c language uses reference counts to manage memory, that is, each object has a counter that can be incremented or decremented. If you want to keep an object alive, increment its reference count, and after it is exhausted, it

Most of the other platform for beginners to develop the foundation to see Xcode, the first impression is to rub the palm of the fist, see Interface Builder, the first feeling is eager, and see Objective-c Grammar, the first impression will become

reference counts and stringsThe spatial allocation of constant strings in memory is different from other objects, they do not have a reference counting mechanismall custom objects have a reference counting mechanism;objects within OC are divided

Objective-c is the most important development language in the field of Mac software development, if we are already familiar with C language or have the base of object-oriented language, it will be very useful for us to learn objective-c.Method

Original link: The official raywenderlich.com objective-c style guide Original Author: raywenderlich.com Team Version: raywenderlich.com objective-c Coding Specification Translator: Sam Lau As I'm preparing to mimic the

We know that self represents an instance of the current class. You can call a method to access a property.So what is _cmd ?That's what Apple's official documentation says.The _cmd variable is a hidden argument passed to every method, that's the

Ext.: http://www.apkbus.com/android-593-1.htmlA friend who has studied Java or C should be aware of the static keyword? A static static variable is declared in a class, or the other class wants to use it or modify it without the new object, directly

Versions and platformsThe runtime system, for Objective-c, is like its operating system, or running support platform, which allows the OBJECTIVE-C code to run in accordance with established language features. In contrast to C + +, objective-c as

When we learn C language, encountered a program jump, called Goto,goto can jump to any place in the program. Again later, learned the programming methodology, I do not know which computer predecessors (seemingly Dijkstra), that Goto makes the

Catalogue Non Fragile Ivars Why non fragile Ivars is critical How to address class member variables True "how to address class member variables" Non Fragile ivars Layout adjustment Why the Objective-c class cannot

------Java Training, Android training, iOS training,. NET training, look forward to communicating with you! -------Compiler attributes @property and @synthesize1. @property@property can automatically generate setter and getter declarations for a

------Java Training, Android training, iOS training,. NET training, look forward to communicating with you! -------One, dot syntaxThe purpose of OC design point syntax is to enable other language developers to quickly get started with the OC

Do not repost the labor results of developers Operators and expressions Operators can be divided into the following types: ? Arithmetic Operators, +,-, *,/, %, ++ ,―― ? Relational operators,>, =, ? Boolean logical operator ,! , &, | ? Bitwise

Objective-C exceptions are similar to Java exception handling, and @ finally processing is also required, regardless of whether the exception is captured or not. Syntax captured by Exception Handling @try { } @catch (NSException