OC learn those things: the first OC Application

1. Steps for creating a development environment for XCode

1. In the Welcome to Xcode window, select Create a new Xcode project.

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Create a new Xcodeproject: Create a new Xcode project.

Connect to a repository: code library

Learn about using Xcode: Query Xcode User Guide documents

Go to Apple's developer portal: Visit the iOS Development Center webpage.

Open Other: select to Open another project

Recents: list of recently opened Projects

2. The Choose a template for your new project window. In The OSX group, the Application and Command Line Tool templates are displayed.

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IOS group: Related to iOS iPhone, iPad, and iTouch Projects

OS X Group: associated with the MacOS Project

Application-Command Line Tool: Console project.

3. Coose options for your new project window.

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Product Name: Project Name

Organization Name: Organization Name

Company Identifier: Company ID

Type: Foundation

Use Automatic Reference Counting: whether to automatically Reference the count

4. Select the directory for saving the project and click Create.

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New Folder: create a New Folder

Source Control: create a local git resource library for this project.

5. After the project is created, open the Xcode development environment. View the project structure.

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Classes: project-related Classes

Frameworks: project-related libraries

Products: compiled OC Program

6. Click the main. m file and you will see the following code in the code editing area.

// Introduce the header file # import <Foundation/Foundation. h> // main function: int main (int argc, const char * argv []) of the OC program entry {// automatically release the pool @ autoreleasepool {NSLog (@ "Hello, world! ");} Return 0 ;}

For more information, see: http://blog.csdn.net/p106786860/article/details/9317955

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