iPhone的Socket编程使用开源代码之AsyncSocket(转)

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

来自：http://www.iteye.com/topic/993392 

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

我们将AsyncSocket.h和AsyncSocket.m文件添加到我们的项目中，并且导入CFNetwork.framework<系统包>。这样基本准备工作就做好了。

（添加 CFNetwork.framework的位置："/System/Library/Frameworks/CFNetwork.framework，如果没有则

/Developer/Platforms/iphoneOS.platform/Developer/SDKs/iphoneOS4.3.sdk/System/Library/Frameworks文件夹下

iphoneOS4.3.sdk根据你的版本的不同而不同）

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

@synthesize inputMsg, outputMsg;  
@synthesize client;  


// 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 {  
    [inputMsg release];
    inputMsg = nil;
    [outputMsg release];
    outputMsg = nil;
    self.client = nil;  
    // Release any retained subviews of the main view.  
    // e.g. self.myOutlet = nil;  
}  

/*
- (IBAction)sendMsg:(id)sender {
    
    NSLog(@"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];  
}
*/
- (int) connectServer: (NSString *) hostIP port:(int) hostPort{  
    
    NSLog(@"connectServer");
    
    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];  
    NSLog(@"reconnect:%@",stat);
    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{  
    
    NSLog(@"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{  
    
    NSLog(@" (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。

其他要说的，明天再完善吧。

• AsyncSocket.zip (167.4 KB)
• 下载次数: 248
• 我的Demo：T_Socket.zip