三：链接服务器
1- (IBAction)connectToHost:(id)sender {
//1.建立连接
NSString *host =@"127.0.0.1";
intport =12345;
//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);
//设置代理
_inputStream.delegate=self;
_outputStream.delegate=self;
//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];
//打开输入输出流
[_inputStream open];
[_outputStream open];
}
四：登陆
- (IBAction)loginBtnClick:(id)sender {
//登录
//发送用户名和密码
//在这里做的时候，只发用户名，密码就不用发送
//如果要登录，发送的数据格式为 "iam:zhangsan";
//如果要发送聊天消息，数据格式为 "msg:did you have dinner";
//登录的指令11NSString *loginStr =@"iam:zhangsan";
//把Str转成NSData
NSData *data =[loginStr dataUsingEncoding:NSUTF8StringEncoding];
[_outputStream write:data.bytes maxLength:data.length];
}
五：读取服务器数据
#pragmamark 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];
}
六：发送数据
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
NSString *text =textField.text;
NSLog(@"%@",text);
//聊天信息
NSString *msgStr = [NSString stringWithFormat:@"msg:%@",text];
//把Str转成NSData10NSData *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;
returnYES;
}
七：实现数据的显示，并且每发送一次消息都会滚动到对应的位置
-(void)reloadDataWithText:(NSString *)text{
[self.chatMsgs addObject:text];
[self.tableView reloadData];
//数据多，应该往上滚动
NSIndexPath *lastPath = [NSIndexPath indexPathForRow:self.chatMsgs.count -1inSection:0];
[self.tableView scrollToRowAtIndexPath:lastPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
}
#pragmamark 表格的数据源
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
returnself.chatMsgs.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
staticNSString *ID =@"Cell";
UITableViewCell *cell =[tableView dequeueReusableCellWithIdentifier:ID];
cell.textLabel.text =self.chatMsgs[indexPath.row];
returncell;
}
-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
[self.view endEditing:YES];
}
