Socket通信（一）

//
//  ViewController.m
//  Socket1
//
//  Created by 阿仁欧巴 on 16/5/7.
//  Copyright © 2016年 aren. All rights reserved.
//

#import "ViewController.h"

@interface ViewController () <NSStreamDelegate, UITextFieldDelegate, UITableViewDataSource, UITableViewDelegate>
{
    NSInputStream *_inputStream;
    NSOutputStream *_outStream;
}
//@property (weak, nonatomic) IBOutlet NSLayoutConstraint *bottomViewConstraint;
@property (weak, nonatomic) IBOutlet UIView *commentView;//发送消息的文本框的父视图，根据键盘的出现与否设置它的frame
@property (weak, nonatomic) IBOutlet UITableView *tableView;
@property (nonatomic, strong) NSMutableArray *chatMsgs; //聊天消息数组

@end

@implementation ViewController

- (NSMutableArray *)chatMsgs
{
    if (!_chatMsgs) {
        _chatMsgs = [NSMutableArray array];
    }
    return _chatMsgs;
}

//连接服务器的按钮
- (IBAction)connect:(id)sender
{
    //1.获取服务器的IP地址和端口号
    NSString *host = @"127.0.0.1";
    int port = 8080;

    //2.获取输入输出流
    CFReadStreamRef readRef;
    CFWriteStreamRef writeRef;

    //3.将C语言对象转换成OC对象
    _inputStream = (__bridge NSInputStream *)(readRef);
    _outStream = (__bridge NSOutputStream *)(writeRef);

    //4.建立连接
    CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)host, port, &readRef, &writeRef);

    //5.设置代理
    _inputStream.delegate = self;
    _outStream.delegate = self;
#pragma mark ---如果不添加到主循环，代理方法可能不执行----
    //6.扔进主循环
    [_inputStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
    [_outStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];

    //7.打开输入输出流
    [_inputStream open];
    [_outStream open];
#pragma mark ---链接结束时，需要将输入输出流从主循环中移除 并且关闭输入输出流, 在代理方法中执行----

}

//登录按钮
- (IBAction)login:(id)sender
{
    //登陆的指令
    NSString *loginString = @"iam:arenouba";
    //转换成NSData类型的
    NSData *data = [loginString dataUsingEncoding:NSUTF8StringEncoding];
    //输出流发送登录数据给服务器
    [_outStream write:data.bytes maxLength:data.length];

}

#pragma mark ---输入流 读取 服务器 返回的数据  XMPP 已经封装好了，不用我们处理---
- (void)readData
{
    //建立一个缓冲区，可以放1024个字节
    uint8_t buf[1024];
    // len 返回实际存放的字节数
    NSInteger len = [_inputStream read:buf maxLength:sizeof(buf)]; //sizeof(buf)
    //把字节转化成字符串
    NSData *data = [NSData dataWithBytes:buf length:len];
    //转换成字符串 从服务器接收到的数据
    NSString *recieveString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    //刷新数据
    [self reloadDataWithText:recieveString];

    NSLog(@"%@",recieveString);
}

#pragma mark --- 点击发送按钮时 获取文本输入框的文字，并刷新tableView ---

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    NSString *text = textField.text;
    NSData *data = [text dataUsingEncoding:NSUTF8StringEncoding];
    [self reloadDataWithText:text];
    //发送数据给服务器
    [_outStream write:data.bytes maxLength:data.length];
    //发送完成后，清空文本框
    textField.text = nil;
    return YES;
}

- (void)reloadDataWithText:(NSString *)text
{
    //添加文本输入框的数据到消息数组中
    [self.chatMsgs addObject:text];
    //刷新
    [self.tableView reloadData];
    //发送一条消息，使tableView跟着向上滚动一行
    NSIndexPath *lastIndexPath = [NSIndexPath indexPathForRow:self.chatMsgs.count - 1 inSection:0];
    [self.tableView scrollToRowAtIndexPath:lastIndexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];

}

#pragma mark --- 将要拖动时，键盘消失---

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    [self.view endEditing:YES];
}

#pragma mark ----NSStreamDelegate -----

- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode
{
#warning mark --- 这是在主线程中执行的
    NSLog(@"%@",[NSThread currentThread]);
    /*
     NSStreamEventNone = 0,
     NSStreamEventOpenCompleted = 1UL << 0, 输入输出流打开完成
     NSStreamEventHasBytesAvailable = 1UL << 1, 有字节可读
     NSStreamEventHasSpaceAvailable = 1UL << 2, 可以发送字节
     NSStreamEventErrorOccurred = 1UL << 3, 连接出现了错误
     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");
            break;
        case NSStreamEventHasSpaceAvailable:
            NSLog(@"可以发送字节");
            break;
        case NSStreamEventErrorOccurred:
            NSLog(@"连接错误");
            break;
        case NSStreamEventEndEncountered:
            NSLog(@"连接结束");
            //关闭输入输出流
            [_inputStream close];
            [_outStream close];

            //从主循环移除
            [_inputStream removeFromRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
            [_outStream removeFromRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];

            break;
        default:
            break;
    }

}

- (void)viewDidLoad {
    [super viewDidLoad];

    //监听键盘将要出现时
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChang:) name:UIKeyboardWillChangeFrameNotification object:nil];
    //监听键盘将要隐藏时
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHidden:) name:UIKeyboardWillHideNotification object:nil];

    self.tableView.delegate = self;
    self.tableView.dataSource = self;
    [self.view insertSubview:_tableView atIndex:0];

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

- (void)keyboardWillChang:(NSNotification *)noti
{
    NSLog(@"%@",noti.userInfo);
    //键盘结束的y值
    CGRect kbEndFrame = [noti.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
    [UIView animateWithDuration:[noti.userInfo[UIKeyboardAnimationDurationUserInfoKey] floatValue] animations:^{
        self.commentView.transform = CGAffineTransformMakeTranslation(0, -kbEndFrame.size.height);
    }];

}

- (void)keyboardWillHidden:(NSNotification *)noti
{
    //键盘结束的y值
    [UIView animateWithDuration:[noti.userInfo[UIKeyboardAnimationDurationUserInfoKey] floatValue] animations:^{
        self.commentView.transform = CGAffineTransformIdentity;
    }];

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.chatMsgs.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *ID = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];

　　if (cell == nil) {

cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:ID];

}

　　cell.textLabel.text = self.chatMsgs[indexPath.row];
    return cell;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end