Objective-C

Objective-c is the best Class C, object-oriented programming language I have used. Objective-c is perfectly compatible with standard C, and on top of this is the Smalltalk element that interprets the fundamental concept of object-oriented, making it

Objective-c method in the backMethod calls in the Objective-cOC similar to c+, can not avoid the internal various means of communication, function calls, variable transmission, etc., can not avoid a variety of back-off and so on.One, class direct

In previous projects, our programming was written directly in a main.m file. The main () function of the class, @interface and @implementation parts are crammed into a file. This structure is also available for small programs and simple applications.

book.h//Obj-c Learning 1////Created by Itfanr on 14/11/30.//Copyright (c) 2014 ITFANR. All rights reserved.//#import @interface book:nsobject@property float price;-(ID) Initwithprice: (float) Price; @end ////  book.m//  obj-c Learning 1////

In the previous blog post, we had a simple "car model" to explain the composite relationship . In today's blog post, we'll go on to the last example, explaining the use of the access (accessor) method . The so-called access method is the method used

Xcode provides the function of converting a source file into an assembly file, The Assembly Code is as follows: # Assembly output for assemble. C # generated at 2:29:34 pm on Monday, May 25, 2014 # using debug configuration, x86_64

Introduction: In the previous article, we talked about KVC. In this article, we learned KVO. The full name is: key value observing. the literal translation is: key value-based observer. So what is its use? KVO is mainly used for view interaction.

// 1. 声明一个NSString对象，注意对象前要加‘*’； NSString *string1; // 赋值方式1，初始化赋值； NSString *string2 = [[NSString alloc] initWithString: @"hello world!"]; // 赋值方式2； string1 = @"hello world!"; string2 =

Point Syntax:    The essence of point syntax is method call.When the dot syntax is used, the compiler automatically expands to the corresponding method person * P = [person new]; P. Age = 10; // The Compiler automatically converts this line of code

Category in objective-C) 1. Category concept: dynamically add new behaviors (methods) for existing classes) 2. How to Create a category (1) Use xcode to generate a category (2) You can manually generate a category and generate two @ interfaces

Objective-C adds the object-oriented Feature Based on the C language through a new set of syntax. The OC syntax frequently uses braces ([]) and does not limit writing very long method names, which often makes many people think the language is

1. nsdictionary and nsmutabledictionary   Nsdictionary dictionarywithobjectsandkeys :~, Nil Create a dictionary using a key-Value Pair and end with the NIL flag Nsdictionary initwithobjectsandkeys: Use Key-value pairs to initialize the dictionary,

@ Indicates the "objective-c" flag, proving that you are using the objective-C Language   Objective-C language keyword, @ property and @ synthesize pair.   Function:Let the compiler automatically write a method declaration with the same name as the

The code block is essentially similar to other variables. The difference is that the data stored in the code block is a function body. Using a code block, you can pass in the number of arguments and get the return value just like calling other

Objective-C has a lot of dynamic features. Basically, it is also often mentioned and used with dynamic types (dynamic typing) and dynamic binding (dynamic binding) and dynamic loading (dynamic loading ). These dynamic features are commonly used in

Enum and typedef, two examples are shown in the two sections respectively, as shown below:Enum direction {north, south, east, west }; Typedef Enum {north, south, east, west} direction; I can't help wondering what are the differences between the

Do not repost the labor results of developers Access member variables From the perspective of object-oriented encapsulation, if you want to access member variables in the member class through methods, the member variables must have a scope

Nsnumber of objective-C Foundation, nsvalue, nsdate   1. Use nsnumber as follows: In objective-C, there is an int data type, so why should we use the numeric object nsnumber. This is because many classes (such as nsarray) require the use of objects,

// First program example#import int main (int argc, const char * argv[]) { @autoreleasepool { NSLog (@"Programming is fun!"); } return 0; } Before explaining this program, we need to describe the steps for compiling and running.

Although iOS 5/Mac OS X 10.7 starts to import arc, xcode4.2 can be used. ARC is an automatic reference counting function that provides automatic memory management for objective-C Programs during compilation. Arc allows you to focus on the code,