IOS开发网络篇―Socket编程详解

@interfaceViewController (){

NSInputStream *_inputStream;//对应输入流

NSOutputStream *_outputStream;//对应输出流

}

@property (weak, nonatomic) IBOutlet NSLayoutConstraint *inputViewConstraint;

@property (weak, nonatomic) IBOutlet UITableView *tableView;

@property (nonatomic, strong) NSMutableArray *chatMsgs;//聊天消息数组

@end
懒加载这个消息数组

-(NSMutableArray *)chatMsgs{

if(!_chatMsgs) {

_chatMsgs =[NSMutableArray array];

}

return_chatMsgs;

}

-(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) {

caseNSStreamEventOpenCompleted:

NSLog(@"输入输出流打开完成");

break;

caseNSStreamEventHasBytesAvailable:

NSLog(@"有字节可读");

[self readData];

break;

caseNSStreamEventHasSpaceAvailable:

NSLog(@"可以发送字节");

break;

caseNSStreamEventErrorOccurred:

NSLog(@"连接出现错误");

break;

caseNSStreamEventEndEncountered:

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;

}

}

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];

}

- (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];

}

#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];

}

-(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;

}

-(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];

}

//监听键盘

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(kbFrmWillChange:) name:UIKeyboardWillChangeFrameNotificationobject:nil];

}

-(void)kbFrmWillChange:(NSNotification *)noti{

NSLog(@"%@",noti.userInfo);

//获取窗口的高度

CGFloat windowH =[UIScreen mainScreen].bounds.size.height;

//键盘结束的Frm

CGRect kbEndFrm =[noti.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];

//获取键盘结束的y值

CGFloat kbEndY =kbEndFrm.origin.y;

self.inputViewConstraint.constant = windowH -kbEndY;

}