Objective-C

Manage memory manually The retain count is a fairly simple concept in which an object in Objective-c has a retain count. The retain count is an integer. When you use the Alloc function to create an object, the retain count for that object is set to

One, string cutting1, with a node string, such as @ " hate node " We just want the middle of the Chinese Processing method: Copy Code code as follows: NSString *string1 = @ " hate node "; /* Here will not want to put all the

Directly on the code://write? A return value of the integer parameter is nsstring (only? One parameterblock, which enables the conversion of strings to integral types. //Int (NSString *string) {//Return [string intvalue];// }//Assign ^int

The classification in objective-c allows us to augment it by adding a method to a class (but we cannot add new instance variables through category), and we do not need to access the code in the class.The protocol in OBJECTIVE-C is a ubiquitous

1.C language oriented process, OC object-oriented2. First OC Program#import int main (intconstChar * argv[]) { @autoreleasepool { // Insert code here ... NSLog (@ "Hello, world! " ); } return 0 ;}1) Import introduces header

* Represents a pointer with an addressThe ID can be used to hold a reference pointer, such as:void Drawshapes (ID shapes[],int count) {ID shape = shapes[0];}[Shape draw] in Objective_c, the square can also represent: used to notify an object of what

block (OC data type, very common, essentially C struct)Similar to inline functions, from the source code layer, there is the structure of the function, but after compiling, but does not have the nature of the function. At compile time, similar to

Cinema Ticket System/Concert ticket systemRequirements Analysis:First we enter the system, then we will choose to buy movie tickets or buy concert tickets, so this involves the synthesis of two systems. But we know all is the ticket system, so we

Each instance has a pointer to a class object to indicate its type, and these class objects form the inheritance system of the class. If the object type cannot be determined at compile time, then the type information query method should be used

The classification in objective-c allows us to augment it by adding a method to a class (but we cannot add new instance variables through category), and we do not need to access the code in the class.The protocol in OBJECTIVE-C is a ubiquitous

OBJECTIVE-C IntroductionUsually writing OBJC and less used objective C or OBJ-C, is an object-oriented programming language that expands C. It is mainly used in Mac OS X and GNUstep, which use the OpenStep standard system, and it is the basic

Objective-c Http://rypress.com/tutorials/objective-c/indexC Basicshttp://rypress.com/tutorials/objective-c/c-basicsComments Annotations   Inline comments   Block comments   Confusing Snippest Puzzle (code) fragment   self-documenting self record  

Inquisitive objective-c Runtime (1)-Self & Super-chun Tips Chun TipsFocus on iOS development Inquisitive objective-c Runtime (1)-Self & Super PrefaceAbout OBJECTIVE-C Runtime a good document: Understanding the OBJECTIVE-C RuntimeThe

Transferred from: http://mobile.51cto.com/hot-322261.htm 2012-03-07 13:43 junwong Open Source China communityfont Size:T | T As a objective-c coder, I can always hear some people complaining about a lot of problems in this language. They're always

Data type1.OBJECTIVE-C data types can be categorized as: Basic data types, object data types, and ID types.2. The basic data types are: int, float, double, and char type.3. The object type is the type of pointer declared by the class or protocol,

Let's take a look at the main definitions of NSObject as follows (including some of my understanding comments):@interface nsobject {Class isa objc_isa_availability;} /* Initializing a class *//** * @author arbboter, 15-01-15 22:01:47 * * If the

1. nsnumber:Nsarray and nsdictionary do not allow basic data typesNsnumber can encapsulate basic data types into objects, so that the basic data types can be indirectly put into nsarray and nsdictionary. 2. nsvalue:Nsnumber is a subclass of

In objective-C, how do I define a class? We can use the following format for representation: @ Interface Class Name: parent class name {variable definition;} method definition; @ end; An example is provided below: @ Interface

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Author: zyl910I. background Currently, many commonly used UML tools do not support objective-C, which is inconvenient to draw UML. You must manually convert the objective-C syntax parameter list to the UML or C ++ syntax. It is laborious and