Objective-C

Under MacOS, you can use the Authorizationexecutewithprivileges function to run a program as an administrator, which will pop up a box to enter a password if run with administrator privileges. And the execution of this program if the administrator

OC and C + +, Java and other object-oriented languages have a lot of similarities, but in many ways is also different. If you use an object-oriented language, it is easy to understand the paradigms and templates used by the OC language. But the use

IOS7 before Objective-c, JavaScriptUIWebViewObject has the following methods - (NSString *)stringByEvaluatingJavaScriptFromString:(NSString *)scriptThe method can execute JavaScript a string and return the return value of the string type. For

A lot of programmers who want to develop iOS, or are developing iOS, have done Java or C + + before, when the first time to see OBJECTIVE-C code is a headache, objective-c code in the syntax and Java, C + + has a big difference, Some students will

First, objective-c how to achieve:There are 2 plugins to use, one for Jsonkit and the other for Jastor, with a total of 6 files, 3. h header files and 3. m implementation files. How to import third-party tools that do not support arc in an ARC

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?

target-action Model of OBJECTIVE-C release solutionThe target-action pattern is the way the method calls between objects that are very common in OBJC, but OBJC calls the method call a send Message.A bunch of situations can take advantage of this

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

Deep copy and shallow copy shallow copy Shallow copy (shallow copy) feature: The referenced object is not copied, its newly copied object is just a pointer to an existing reference object. (It's actually the equivalent of a shortcut copy

Beginner OC, this method of Init is not very well understood. Let's now rewrite and customize the Init method to deepen our understanding of him. This example also uses the person class to test.(i) rewrite the Init method.(1) Declare the Init method

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:

Knowledge Points:Definition: A dictionary (dictionary) is a collection of keywords and their definitions.On the code:/ * * nsdictionary Immutable Dictionary * */ ///1, common methods for creating dictionary objects you need to assign

1. Why should I have a category? Extending on the basis of existing classes can be implemented using both inheritance and composition, but why does OC have to have categories like this?Consider a scenario where a dictionary is created, key is a

A brief introduction to the current GitHub Top 100 project makes it easy for beginners to quickly learn about the current objective-c on GitHub.If you have any questions, you can contact me via Weibo @ Li JinGitHub address here, welcome to Star and

#import Nsinteger codelinecount (nsstring *path){ //1. Get File Manager, this is a singleton nsfilemanager *manage = [nsfilemanager defaultmanager]; //2. determine the folder or fileBOOL dir = NO;BOOL exist = [Manage fileexistsatpath:p ath

Constant Constant name Description M_pi Circumference rate (= π) M_pi_2 1/2 of the circumference rate (= π/2) M_pi_4 1/4 of the circumference rate (= π/4) M_1_pi =

It is found that many beginners cannot differentiate bool, bool, and class types. Today, I am free to write a blog post to differentiate them. 1. bool is a boolean type of C language, with true and false, bool is a boolean type of Objective C

Preface In Java, we can access the public member variables of an object through "Object Name. member variable name", which is called "Point Syntax ". For example: 1. define a common member variable Age in row 2nd of the student class. 1 public class

@ 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

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