IOS network programming-socket programming in IOS

Use SOCKET for C/S structure programming and connection process

 

The server listens to a port for connection requests. ServerProgramThe client is in a blocked state and can only run down until it sends a connection request to the server. Once the connection is established, the input and output stream objects can be obtained through socket. You can use the input/output stream object to communicate with the client. Do not forget to close the socket and release some resources (including closing the input/output stream ).

The client process is to first specify the Server IP address and port to communicate with and the transmission protocol (TCP or UDP) used to send a connection request to the server. After the server responds to the request, a connection will be established. Then it is the same as the server.

In iOS, client socket programming can use three technologies:

1. Use nsstream. Objective-C language-oriented implementation of Apis provided by Apple's foundation framework;

2. Use cfstream. C language-oriented implementation, provided by the core foundation framework provided by Apple;

BSD socket. Berkeley socket is a widely used socket programming on UNIX platforms. It is implemented in C language and fully written in C, which is troublesome to use. It was developed by students at the University of California (Berkeley.

In iOS, server-side socket programming can use two technologies:

1. Use cfstream. C language-oriented implementation, provided by the core foundation framework provided by Apple;

2 BSD socket. Berkeley socket is a widely used socket programming on UNIX platforms. It is implemented in C language and fully written in C, which is troublesome to use. It was developed by students at the University of California (Berkeley.

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