GCAsyncSocket 这是一个2003的开发出来的一个开源框架

 

首先把GCDAsyncSocket的.h和.m文件拖入到工程中

试图控制器遵守GCDAsyncSocketDelegate协议

 

实例：在页面上有一个简单的textView和textField 在textField中输入文字后，点击发送即可把文字发送到服务器

，服务器端返回的文字数据会显示到textView上

 

//  服务器主机ip地址

#define kHost @"172.16.3.101"

//  服务器主机通信端口

#define kPort 10024

@interface LYViewController ()<GCDAsyncSocketDelegate]]]]>

//  创建socket对象，进行通信

@property (nonatomic, strong) GCDAsyncSocket *socket;

@property (nonatomic, strong) GCDAsyncSocket *socketServer;

//  创建安装socket对象

- (void)_setupSocket;

- (void)_setupServerSocket;

//

- (void)_keyboardFrameChange:(NSNotification *)notification;

@end

 

 

@implementation LYViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

     self.textField.delegate = self;

    [self _setupSocket];

    [self _setupServerSocket];

}

- (BOOL)prefersStatusBarHidden

{

    return YES;

}

#pragma mark - 键盘弹起 改变输入框的位置

#pragma mark 注册通知 改变输入框的位置

- (void)viewWillAppear:(BOOL)animated

{

    [super viewWillAppear:YES];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_keyboardFrameChange:) name:UIKeyboardWillChangeFrameNotification object:nil];

}

#pragma mark 移除通知

- (void)viewWillDisappear:(BOOL)animated

{

    [super viewDidDisappear:YES];

    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillChangeFrameNotification object:nil];

}

#pragma mark 接收到键盘弹起通知相应的方法

- (void)_keyboardFrameChange:(NSNotification *)notification

{

    CGRect textFieldRect = self.textField.frame;

    

    NSDictionary *userInfo = notification.userInfo;

    CGRect beginRect = [userInfo[UIKeyboardFrameBeginUserInfoKey] CGRectValue];

    CGRect endRect = [userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];

    CGFloat tempY = CGRectGetMinY(endRect) - CGRectGetMinY(beginRect);

    

    textFieldRect.origin.y += tempY;

    

    [UIView animateWithDuration:.25 animations:^{

        self.textField.frame = textFieldRect;

    }];

    

}

#pragma mark 点击return 键盘收回 发送消息（写入数据）

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

    NSString *dataString = [self.textField.text stringByAppendingString:@"\r\n"];

    NSData *data = [dataString dataUsingEncoding:NSUTF8StringEncoding];

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

    

    

    [textField resignFirstResponder];

    return YES;

    

}

#pragma amrk - private methods

//  创建安装socket对象

-(void)_setupSocket

{

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

    //  连接到服务器

    [self.socket connectToHost:kHost onPort:kPort error:nil];

}

//  创建服务器对象

- (void)_setupServerSocket

{

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

    

    [self.socket acceptOnPort:10024 error:nil];

}

#pragma mark - socket delegate

//  连接服务器成功

-(void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:(uint16_t)port

{

    NSLog(@"%s", __FUNCTION__);

    //  等待读取数据

    [self.socket readDataToData:[GCDAsyncSocket CRLFData] withTimeout:-1 maxLength:NSIntegerMax tag:0];

}

//  读到数据的回调方法

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

{

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

    self.textView.text = content;

}

- (void)socket:(GCDAsyncSocket *)sock didWriteDataWithTag:(long)tag

{

    [self.socket readDataToData:[GCDAsyncSocket CRLFData] withTimeout:-1 maxLength:NSIntegerMax tag:0];

    

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end