CocoaAsyncSocket網絡通信socket tcp udp

網絡通信，有一個CocoaAsyncSocket這個類庫，然後建兩個工程，分别寫伺服器端和用戶端的，用戶端的IP位址要寫自己電腦的，端口号要相同。

可以GCD 或者RunLoop 我用的是GCD的，直接上代碼，有注釋，都能看懂

• 伺服器.m裡的
• -

import “ViewController.h”

import “GCDAsyncSocket.h”

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UITextField *portF;

@property (weak, nonatomic) IBOutlet UITextField *messageTF;

@property (weak, nonatomic) IBOutlet UITextView *showContentMessageTV;

//伺服器socket（開放端口，監聽用戶端socket的連結）

@property (nonatomic) GCDAsyncSocket *serverSocket;

//保護用戶端socket

@property (nonatomic) GCDAsyncSocket *clientSocket;

@end

@implementation ViewController

pragma mark - 伺服器socket Delegate

• (void)socket:(GCDAsyncSocket )sock didAcceptNewSocket:(GCDAsyncSocket )newSocket{

  //儲存用戶端的socket

  self.clientSocket = newSocket;

  [self showMessageWithStr:@”連結成功”];

  [self showMessageWithStr:[NSString stringWithFormat:@”伺服器位址：%@ -端口： %d”, newSocket.connectedHost, newSocket.connectedPort]];

  [self.clientSocket readDataWithTimeout:-1 tag:0];

  }

//收到消息

- (void)socket:(GCDAsyncSocket )sock didReadData:(NSData )data withTag:(long)tag{

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

[self showMessageWithStr:text];

[self.clientSocket readDataWithTimeout:-1 tag:0];

}

//發送消息

- (IBAction)sendMessage:(id)sender {

NSDictionary *dic = [[NSDictionary alloc]init];

[dic setValue:@”id” forKey:@”12121”];

// NSData *data = [self.messageTF.text dataUsingEncoding:NSUTF8StringEncoding];

NSData *data = [[self dictionaryToJson:dic] dataUsingEncoding:NSUTF8StringEncoding];

//withTimeout -1:無窮大，一直等

//tag:消息标記

[self.clientSocket writeData:data withTimeout:-1 tag:0];

}

-(NSString*)dictionaryToJson:(NSDictionary *)dic

{

NSError *parseError = nil;

NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:&parseError];

return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
           

}

//開始監聽

- (IBAction)startReceive:(id)sender {

//2、開放哪一個端口

NSError *error = nil;

BOOL result = [self.serverSocket acceptOnPort:self.portF.text.integerValue error:&error];

if (result && error == nil) {

//開放成功

[self showMessageWithStr:@”開放成功”];

}

}

//接受消息,socket是用戶端socket，表示從哪一個用戶端讀取消息

- (IBAction)ReceiveMessage:(id)sender {

[self.clientSocket readDataWithTimeout:11 tag:0];

}

• (void)showMessageWithStr:(NSString *)str{

  self.showContentMessageTV.text = [self.showContentMessageTV.text stringByAppendingFormat:@”%@\n”,str];

  }

• (void)viewDidLoad {

  [super viewDidLoad];

  // Do any additional setup after loading the view, typically from a nib.

  // 1、初始化伺服器socket，在主線程力回調

  self.serverSocket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];

  }

• (void)didReceiveMemoryWarning {

  [super didReceiveMemoryWarning];

  // Dispose of any resources that can be recreated.

  }

@end

• 用戶端.m裡的
• -

import “ViewController.h”

import “GCDAsyncSocket.h”

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UITextField *portF;

@property (weak, nonatomic) IBOutlet UITextField *messageTF;

@property (weak, nonatomic) IBOutlet UITextView *showContentMessageTV;

//伺服器socket（開放端口，監聽用戶端socket的連結）

@property (nonatomic) GCDAsyncSocket *serverSocket;

//保護用戶端socket

@property (nonatomic) GCDAsyncSocket *clientSocket;

@end

@implementation ViewController

pragma mark - 伺服器socket Delegate

• (void)socket:(GCDAsyncSocket )sock didAcceptNewSocket:(GCDAsyncSocket )newSocket{

  //儲存用戶端的socket

  self.clientSocket = newSocket;

  [self showMessageWithStr:@”連結成功”];

  [self showMessageWithStr:[NSString stringWithFormat:@”伺服器位址：%@ -端口： %d”, newSocket.connectedHost, newSocket.connectedPort]];

  [self.clientSocket readDataWithTimeout:-1 tag:0];

  }

//收到消息

- (void)socket:(GCDAsyncSocket )sock didReadData:(NSData )data withTag:(long)tag{

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

[self showMessageWithStr:text];

[self.clientSocket readDataWithTimeout:-1 tag:0];

}

//發送消息

- (IBAction)sendMessage:(id)sender {

NSDictionary *dic = [[NSDictionary alloc]init];

[dic setValue:@”id” forKey:@”12121”];

// NSData *data = [self.messageTF.text dataUsingEncoding:NSUTF8StringEncoding];

NSData *data = [[self dictionaryToJson:dic] dataUsingEncoding:NSUTF8StringEncoding];

//withTimeout -1:無窮大，一直等

//tag:消息标記

[self.clientSocket writeData:data withTimeout:-1 tag:0];

}

-(NSString*)dictionaryToJson:(NSDictionary *)dic

{

NSError *parseError = nil;

NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:&parseError];

return [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
           

}

//開始監聽

- (IBAction)startReceive:(id)sender {

//2、開放哪一個端口

NSError *error = nil;

BOOL result = [self.serverSocket acceptOnPort:self.portF.text.integerValue error:&error];

if (result && error == nil) {

//開放成功

[self showMessageWithStr:@”開放成功”];

}

}

//接受消息,socket是用戶端socket，表示從哪一個用戶端讀取消息

- (IBAction)ReceiveMessage:(id)sender {

[self.clientSocket readDataWithTimeout:11 tag:0];

}

• (void)showMessageWithStr:(NSString *)str{

  self.showContentMessageTV.text = [self.showContentMessageTV.text stringByAppendingFormat:@”%@\n”,str];

  }

• (void)viewDidLoad {

  [super viewDidLoad];

  // Do any additional setup after loading the view, typically from a nib.

  // 1、初始化伺服器socket，在主線程力回調

  self.serverSocket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];

  }

• (void)didReceiveMemoryWarning {

  [super didReceiveMemoryWarning];

  // Dispose of any resources that can be recreated.

  }

@end