iPhone开发Socket编程使用开源代码之AsyncSocket

假如你也是一个java程序员，而你又不是很懂Socket。

下面我的这篇文章也许能帮助你一些。

http://xiva.iteye.com/blog/993336

首先我们写好上面文章中的server端。

下面我们可以访问一下下面的地址：

http://code.google.com/p/cocoaasyncsocket/

这是一个开源框架。呵，不知道拿到自己程序中使用是否涉及侵权。

但是这句话“The CocoaAsyncSocket project is in the public domain.”是我有信心使用它们的源码，否则只能自己用c来写了，或者使用CFSocket、CFNetwork等类自己来写了。不过也无妨，应在在使用线程的情况下，我们也是可以实现的。

总之，为了开发的便捷，我使用了AsyncSocket这个类，这样可以异步通信。

建立一个基于视图的应用程序，按照http://code.google.com/p/cocoaasyncsocket/wiki/Reference_AsyncSocket

我们AsyncSocket.h和AsyncSocket.m到我们的项目中，并且导入CFNetwork.framework。这样基本准备工作就做好了。



下面提供我的应用中的代码以及界面图：



Socketdemoviewcontroller.h代码


//

// SocketDemoViewController.h

// SocketDemo

//

// Created by xiang xiva on 10-7-10.

// Copyright 2010 __MyCompanyName__. All rights reserved.

//



#import <UIKit/UIKit.h>

#import "AsyncSocket.h"

#define SRV_CONNECTED 0

#define SRV_CONNECT_SUC 1

#define SRV_CONNECT_FAIL 2

#define HOST_IP @"192.168.110.1"

#define HOST_PORT 8080



@interface SocketDemoViewController : UIViewController {



UITextField *inputMsg;

UILabel *outputMsg;

AsyncSocket *client;

}



@property (nonatomic, retain) AsyncSocket *client;

@property (nonatomic, retain) IBOutlet UITextField *inputMsg;

@property (nonatomic, retain) IBOutlet UILabel *outputMsg;



- (int) connectServer: (NSString *) hostIP port:(int) hostPort;

- (void) showMessage:(NSString *) msg;

- (IBAction) sendMsg;

- (IBAction) reConnect;

- (IBAction) textFieldDoneEditing:(id)sender;

- (IBAction) backgroundTouch:(id)sender;



@end







socketdemoviewcontroller.m代码


//

// SocketDemoViewController.m

// SocketDemo

//

// Created by xiang xiva on 10-7-10.

// Copyright 2010 __MyCompanyName__. All rights reserved.

//



#import "SocketDemoViewController.h"



@implementation SocketDemoViewController



@synthesize inputMsg, outputMsg;

@synthesize client;

/*

// The designated initializer. Override to perform setup that is required before the view is loaded.

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {

self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];

if (self) {

// Custom initialization

}

return self;

}

*/



/*

// Implement loadView to create a view hierarchy programmatically, without using a nib.

- (void)loadView {

}

*/







// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.

- (void)viewDidLoad {

//[super viewDidLoad];

[self connectServer:HOST_IP port:HOST_PORT];

//监听读取



}







// Override to allow orientations other than the default portrait orientation.

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

return YES;

}



- (void)didReceiveMemoryWarning {

// Releases the view if it doesn't have a superview.

[super didReceiveMemoryWarning];



// Release any cached data, images, etc that aren't in use.

}



- (void)viewDidUnload {

self.client = nil;

// Release any retained subviews of the main view.

// e.g. self.myOutlet = nil;

}



- (int) connectServer: (NSString *) hostIP port:(int) hostPort{



if (client == nil) {

client = [[AsyncSocket alloc] initWithDelegate:self];

NSError *err = nil;

//192.168.110.128

if (![client connectToHost:hostIP onPort:hostPort error:&err]) {

NSLog(@"%@ %@", [err code], [err localizedDescription]);



UIAlertView *alert = [[UIAlertView alloc] initWithTitle:[@"Connection failed to host "

stringByAppendingString:hostIP]

message:[[[NSString alloc]initWithFormat:@"%@",[err code]] stringByAppendingString:[err localizedDescription]]

delegate:self

cancelButtonTitle:@"OK"

otherButtonTitles:nil];

[alert show];

[alert release];

//client = nil;

return SRV_CONNECT_FAIL;

} else {

NSLog(@"Conectou!");

return SRV_CONNECT_SUC;

}

}

else {

[client readDataWithTimeout:-1 tag:0];

return SRV_CONNECTED;

}



}



- (IBAction) reConnect{

int stat = [self connectServer:HOST_IP port:HOST_PORT];

switch (stat) {

case SRV_CONNECT_SUC:

[self showMessage:@"connect success"];

break;

case SRV_CONNECTED:

[self showMessage:@"It's connected,don't agian"];

break;

default:

break;

}

}



- (IBAction) sendMsg{



NSString *inputMsgStr = self.inputMsg.text;

NSString * content = [inputMsgStr stringByAppendingString:@"\r\n"];

NSLog(@"%a",content);

NSData *data = [content dataUsingEncoding:NSISOLatin1StringEncoding];

[client writeData:data withTimeout:-1 tag:0];



//[data release];

//[content release];

//[inputMsgStr release];

//继续监听读取

//[client readDataWithTimeout:-1 tag:0];

}



#pragma mark -

#pragma mark close Keyboard

- (IBAction) textFieldDoneEditing:(id)sender{

[sender resignFirstResponder];

}



- (IBAction) backgroundTouch:(id)sender{

[inputMsg resignFirstResponder];

}



#pragma mark socket uitl



- (void) showMessage:(NSString *) msg{

UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"Alert!"

message:msg

delegate:nil

cancelButtonTitle:@"OK"

otherButtonTitles:nil];

[alert show];

[alert release];

}





#pragma mark socket delegate



- (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port{

[client readDataWithTimeout:-1 tag:0];

}



- (void)onSocket:(AsyncSocket *)sock willDisconnectWithError:(NSError *)err

{

NSLog(@"Error");

}



- (void)onSocketDidDisconnect:(AsyncSocket *)sock

{

NSString *msg = @"Sorry this connect is failure";

[self showMessage:msg];

[msg release];

client = nil;

}



- (void)onSocketDidSecure:(AsyncSocket *)sock{



}



- (void)onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{



NSString* aStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

NSLog(@"Hava received datas is :%@",aStr);

self.outputMsg.text = aStr;

[aStr release];

[client readDataWithTimeout:-1 tag:0];

}



#pragma mark dealloc



- (void)dealloc {



[client release];

[inputMsg release];

[outputMsg release];

[super dealloc];

}



@end







还是先给出我的界面吧，否则很难懂这些代码







这样大家满意了吧！

好了说了这么多我们还是来看看代码究竟怎么回事吧。

首先从头文件开始看吧，

1，导入头文件#import "AsyncSocket.h"，然后是一些宏

2，声明一个AsyncSocket对象，其他就是一些IBoutlet

再次我们看看视图加载，





Java代码


- (void)viewDidLoad {

//[super viewDidLoad];

[self connectServer:HOST_IP port:HOST_PORT];

//监听读取



}

显然我们调用了connectServer::这个方法。

在这个方法中，首先初始化我们的对象，使用代理的方式。对象显示是self。然后我们便需在我们的类中实现它的各种方法，来得到各种我们想得到的。

client = [[AsyncSocket alloc] initWithDelegate:self];

下面就是连接服务器了，

[client connectToHost:hostIP onPort:hostPort error:&err]

并且当client不为空时，我们就读取服务器的信息

[client readDataWithTimeout:-1 tag:0];







Java代码


- (void)onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{



NSString* aStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

NSLog(@"Hava received datas is :%@",aStr);

self.outputMsg.text = aStr;

[aStr release];

[client readDataWithTimeout:-1 tag:0];

}





在这个方法中很耐人寻味，主要就是在于递归的调用。





Sendmsg代码


- (IBAction) sendMsg{



NSString *inputMsgStr = self.inputMsg.text;

NSString * content = [inputMsgStr stringByAppendingString:@"\r\n"];

NSLog(@"%a",content);

NSData *data = [content dataUsingEncoding:NSISOLatin1StringEncoding];

[client writeData:data withTimeout:-1 tag:0];

}

我们在看看上面发送消息的代码，中的在于"\r\n"的拼接，否则在java端的程序，无法知道你发过来的信息是否结束，当然你也可以使用其他的方式来读取客户端，比如定时；但是我在java端写的server是readLine来判断的，所以需要拼接这个\r\n.



其他的代码除了asyncSocket代理外都是我们所熟悉的。



这些都是asyncsocket代理的代码


- (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port{

[client readDataWithTimeout:-1 tag:0];

}



- (void)onSocket:(AsyncSocket *)sock willDisconnectWithError:(NSError *)err

{

NSLog(@"Error");

}



- (void)onSocketDidDisconnect:(AsyncSocket *)sock

{

NSString *msg = @"Sorry this connect is failure";

[self showMessage:msg];

[msg release];

client = nil;

}



- (void)onSocketDidSecure:(AsyncSocket *)sock{



}



- (void)onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{



NSString* aStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

NSLog(@"Hava received datas is :%@",aStr);

self.outputMsg.text = aStr;

[aStr release];

[client readDataWithTimeout:-1 tag:0];

}



到此就结束了。

原址：http://xiva.iteye.com/blog/993392（原址有demo）