Tutorial on connecting Wifi to the Internet using Socket in iPhone applications

IPhoneWifi usageSocketConnecting to the Internet is the content to be introduced in this article.ServerThe process of sending and receiving messages. Let's just look at the details.

1. Use AsyncSocket (http://code.google.com/p/cocoaasyncsocket/)Socket.

2. An EchoServer is provided in this database. We can use this program to run a test on the MAC system.ServerUp.

3. Add AsyncSocket to the iPhone project according to the WIKI of AsyncSocket (http://code.google.com/p/cocoaasyncsocket/wiki/iPhone). Remember to define the TARGET_ OS _IPHONE macro in the project.

4. The compilation project passes.

5. Connection server code:

 
 

  
  
// Create a Socket entity and connect to port 7777 of the local server
  
  
_ Client = [[AsyncSocket alloc] initWithDelegate: self];
  
  
NSError * err = nil;
  
  
If (! [_ Client connectToHost: @ "127.0.0.1" onPort: 7777 withTimeout: 1.0f error: & err]) {
  
  
NSLog (@ "client net: % @", err );
  
  
}
  
  
 
  
  
// Add the Event Response Function
  
  
A:-(void) onSocket :( AsyncSocket *) sock didConnectToHost :( NSString *) host port :( UInt16) port;
  
  
B:-(void) onSocketDidSecure :( AsyncSocket *) sock;
  
  
C:-(void) onSocket :( AsyncSocket *) sock willDisconnectWithError :( NSError *) err;
  
  
D:-(void) onSocketDidDisconnect :( AsyncSocket *) sock;
  
  
E:-(void) onSocket :( AsyncSocket *) sock didReadData :( NSData *) data withTag :( long) tag;
  
  
 
  
  
// Request to read data in function A. The AsyncSocket calls function E when receiving data.
  
  
[_ Client readDataWithTimeout:-1 tag: 0];
  
  
 
  
  
// After function E is called, The Read Request ends. We don't want it to end, so we add it at the end of function E so that the read process can continue.
  
  
[_ Client readDataWithTimeout:-1 tag: 0];
  
  
 
  
  
// Record the input sock in function A. This is the socket interface of the server we connect.
  
  
_ Server = sock;
  
  
 
  
  
// Send data to the server
  
  
NSData * data;
  
  
[_ Server writeData: data withTimeout:-1 tag: 1];
 
 

6. In this way, we can basically implement the process of sending and receiving messages with the server (Note: These callback functions are implemented in the main thread and are not in other threads)

7. You have not paid too much attention to other response events.

Summary: DetailsIPhone WifiUseSocketConnectionInternetI hope this article will help you!