ios--socket

 一、打开服务器

a、在终端打开，到服务器文件路径输入命令 python chatserver.py

b、当显示 Iphone Chat server started 表示成功

二、建立连接

a、设置对应的流

@interface ViewController ()<NSStreamDelegate,UITextFieldDelegate,UITableViewDataSource,UITableViewDelegate>{
    NSInputStream *_inputStream;//对应输入流
    NSOutputStream *_outputStream;//对应输出流
}

b、建立连接

NSString *host = @"127.0.0.1";
    int port = 12345;
    
c、 定义C语言输入输出流
    CFReadStreamRef readStream;
    CFWriteStreamRef writeStream;
    CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)host, port, &readStream, &writeStream);
    
    // 把C语言的输入输出流转化成OC对象
    _inputStream = (__bridge NSInputStream *)(readStream);
    _outputStream = (__bridge NSOutputStream *)(writeStream);
    
    
d、 设置代理
    _inputStream.delegate = self;
    _outputStream.delegate = self;
    
    
e、把输入输入流添加到主运行循环； 不添加主运行循环 代理有可能不工作
    [_inputStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
    [_outputStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
    
g、打开输入输出流
    [_inputStream open];
    [_outputStream open];
}

h、设置代理

- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode{
    NSLog(@"%@",[NSThread currentThread]);

//    NSStreamEventOpenCompleted = 1UL << 0,//输入输出流打开完成
//    NSStreamEventHasBytesAvailable = 1UL << 1,//有字节可读
//    NSStreamEventHasSpaceAvailable = 1UL << 2,//可以发放字节
//    NSStreamEventErrorOccurred = 1UL << 3,// 连接出现错误
//    NSStreamEventEndEncountered = 1UL << 4// 连接结束
    switch (eventCode) {
        case NSStreamEventOpenCompleted:
            NSLog(@"输入输出流打开完成");
            break;
        case NSStreamEventHasBytesAvailable:
            NSLog(@"有字节可读");
            [self readData];
            break;
        case NSStreamEventHasSpaceAvailable:
            NSLog(@"可以发送字节");
            break;
        case NSStreamEventErrorOccurred:
                        NSLog(@" 连接出现错误");
            break;
        case NSStreamEventEndEncountered:
             NSLog(@"连接结束");
            
            // 关闭输入输出流
            [_inputStream close];
            [_outputStream close];
            
            // 从主运行循环移除
            [_inputStream removeFromRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
            [_outputStream removeFromRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
            break;
        default:
            break;
    }
    
}

三、读了服务器返回的数据
-(void)readData{
    
    //建立一个缓冲区 可以放1024个字节
    uint8_t buf[1024];
    
    // 返回实际装的字节数
    NSInteger len = [_inputStream read:buf maxLength:sizeof(buf)];

    // 把字节数组转化成字符串
    NSData *data = [NSData dataWithBytes:buf length:len];
    
    // 从服务器接收到的数据
    NSString *recStr =  [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    
    NSLog(@"%@",recStr);
    
    [self reloadDataWithText:recStr];
    
}

 

四、文本框输入

- (BOOL)textFieldShouldReturn:(UITextField *)textField{
    
    NSString *text = textField.text;
    
    NSLog(@"%@",text);
    // 聊天信息
    NSString *msgStr = [NSString stringWithFormat:@"msg:%@",text];
    
    //把Str转成NSData
    NSData *data = [msgStr dataUsingEncoding:NSUTF8StringEncoding];
    
    // 刷新表格
    [self reloadDataWithText:msgStr];
    
    // 发送数据
    [_outputStream write:data.bytes maxLength:data.length];
    
    // 发送完数据，清空textField
    textField.text = nil;
    
    return YES;
}