iPhone TCP/IP套接字服务器/客户端程序

Question

我在这个网站上已经阅读了很多关于这个主题的问题,但他们并没有安静地回答我的问题.如果你不能###关于我的目标或背景,请跳过这个问题.

我的目标

是构建一个可以在Mac OS X 10.4及更高版本上运行的服务器,将其移植到Windows XP/Vista(不知道如何做到这一点,但这是以后的问题).

然后让iPhone成为能够查看运行服务器的计算机名称(通过WiFi)的客户端.然后,iPhone的用户可以选择计算机名称以连接到该计算机上的服务器.

之后,他们可以相互发送简单的短信.例如,iPhone发送'Knock Knock'并且服务器响应'谁在那里？'.或者一个简单的客户端:'Ping',服务器响应'Pong'就行了.

背景

我以前使用套接字,但只有在使用WINSOCKET.dll的Visual Basic 6中才能很容易地创建TCP/IP服务器.

server.host = localhost;
server.port = 12203;
server.listen(); 

对于客户端,我只需要执行以下连接.

client.connect(localhost, 12203);

有一些回调可用,如connect,close,dataArrival等,我可以用来做我想做的任何事情.

也许对于iPhone来说,有为它编写的库,但是自己创建这个简单的应用程序是否很难？在做了一些研究后,我明白我必须查看CFNetwork,CFHost,CFSocket,CFStream等领域.

题

是否有人可以指导我阅读教程或发布iPhone上有两个按钮的代码.[Start Server]和[Connect to Server],第一个将在某个端口上启动TCP/IP服务器,第二个连接到它.

在建立连接之后,也可能是在服务器收到此消息后向服务器发送简单的"Ping"消息的代码,并向客户端发送"Pong"消息.

这真的很有帮助.但也许我在这里要求很多.

Answer 1

这个教程创建一个聊天示例应用程序非常好,非常简单(任何iphone noob,像我一样,可以使它工作,即使在模拟器模式下,它连接到外部套接字服务器).

我改编它来谈论我的套接字服务器,它就像一个魅力.这是测试代码,所以没有真正关心松散的目的.它只发送一条消息(您的登录ID)并收到回复,它在控制台中显示.

//
//  ViewController.m
//  zdelSocketTest01a
//
//

#import "ViewController.h"



@implementation ViewController
@synthesize inputNameField;
@synthesize joinView;

- (void)initNetworkCommunication {

    uint portNo = 5555;
    CFReadStreamRef readStream;
    CFWriteStreamRef writeStream;
    CFStreamCreatePairWithSocketToHost(NULL, (CFStringRef)@"227.3.4.56", portNo, &readStream, &writeStream);
    inputStream = (__bridge NSInputStream *)readStream;
    outputStream = (__bridge NSOutputStream *)writeStream;

    [inputStream setDelegate:self];
    [outputStream setDelegate:self];

    [inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
    [inputStream open];
    [outputStream open];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    [self initNetworkCommunication];
    messages = [[NSMutableArray alloc] init];
}

- (void)viewDidUnload
{
    [self setInputNameField:nil];
    [self setJoinView:nil];
    [self setJoinView:nil];
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

- (IBAction)joinChat:(id)sender {

    NSString *response  = [NSString stringWithFormat:@"logon,%@", inputNameField.text];
    NSData *data = [[NSData alloc] initWithData:[response dataUsingEncoding:NSASCIIStringEncoding]];
    [outputStream write:[data bytes] maxLength:[data length]];

}
/*
 - (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent {
 NSLog(@"stream event %i", streamEvent);
 }
 */

- (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent {
    typedef enum {
        NSStreamEventNone = 0,
        NSStreamEventOpenCompleted = 1 << 0,
        NSStreamEventHasBytesAvailable = 1 << 1,
        NSStreamEventHasSpaceAvailable = 1 << 2,
        NSStreamEventErrorOccurred = 1 << 3,
        NSStreamEventEndEncountered = 1 << 4
    };
    uint8_t buffer[1024];
    int len;

    switch (streamEvent) {

        case NSStreamEventOpenCompleted:
            NSLog(@"Stream opened now");
            break;
        case NSStreamEventHasBytesAvailable:
            NSLog(@"has bytes");
            if (theStream == inputStream) {
                while ([inputStream hasBytesAvailable]) {
                    len = [inputStream read:buffer maxLength:sizeof(buffer)];
                    if (len > 0) {

                        NSString *output = [[NSString alloc] initWithBytes:buffer length:len encoding:NSASCIIStringEncoding];

                        if (nil != output) {
                            NSLog(@"server said: %@", output);
                        }
                    }
                }
            } else {
                NSLog(@"it is NOT theStream == inputStream");
            }
            break;
        case NSStreamEventHasSpaceAvailable:
            NSLog(@"Stream has space available now");
            break;


        case NSStreamEventErrorOccurred:
            NSLog(@"Can not connect to the host!");
            break;


        case NSStreamEventEndEncountered:

            [theStream close];
            [theStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];

            break;

        default:
            NSLog(@"Unknown event %i", streamEvent);
    }

}
/*
 - (void) messageReceived:(NSString *)message {

 [messages addObject:message];
 [self.tView reloadData];

 }
 */

@end

您的ViewController.h文件将包含

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <NSStreamDelegate>
@property (weak, nonatomic) IBOutlet UITextField *inputNameField;
@property (weak, nonatomic) IBOutlet UIView *joinView;
- (IBAction)joinChat:(id)sender;


@end
NSInputStream *inputStream;
NSOutputStream *outputStream;
NSMutableArray * messages;

仅限NOOBS:您必须通过按CONTROL并将对象拖动到代码窗口来链接按钮和文本字段.当您这样做时,将自动创建上面的属性.如果你感到难过,请查看此视频教程

NOOBS ONLY 2:此套接字将在XCODE的CONSOLE PANE中输出.在xcode窗口的右上角,单击HIDE OR SHOW THE DEBUG AREA(必要时请求帮助).

在具有2GB内存的macbook上构建和测试(模拟器和设备),使用xcode 4.2进行雪豹.