Socket通訊（一）

//
//  ViewController.m
//  Socket1
//
//  Created by 阿仁歐巴 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;//發送消息的文本框的父視圖，根據鍵盤的出現與否設置它的frame
@property (weak, nonatomic) IBOutlet UITableView *tableView;
@property (nonatomic, strong) NSMutableArray *chatMsgs; //聊天消息數組

@end

@implementation ViewController

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

//鏈接服務器的按鈕
- (IBAction)connect:(id)sender
{
    //1.獲取服務器的IP地址和端口號
    NSString *host = @"127.0.0.1";
    int port = 8080;
    
    //2.獲取輸入輸出流
    CFReadStreamRef readRef;
    CFWriteStreamRef writeRef;
    
    //3.將C語言對象轉換成OC對象
    _inputStream = (__bridge NSInputStream *)(readRef);
    _outStream = (__bridge NSOutputStream *)(writeRef);
    
    //4.創建鏈接
    CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)host, port, &readRef, &writeRef);
    
    //5.設置代理
    _inputStream.delegate = self;
    _outStream.delegate = self;
#pragma mark ---若是不添加到主循環，代理方法可能不執行----
    //6.扔進主循環
    [_inputStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
    [_outStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
    
    //7.打開輸入輸出流
    [_inputStream open];
    [_outStream open];
#pragma mark ---連接結束時，須要將輸入輸出流從主循環中移除 而且關閉輸入輸出流, 在代理方法中執行----
    
}

//登陸按鈕
- (IBAction)login:(id)sender
{
    //登錄的指令
    NSString *loginString = @"iam:arenouba";
    //轉換成NSData類型的
    NSData *data = [loginString dataUsingEncoding:NSUTF8StringEncoding];
    //輸出流發送登陸數據給服務器
    [_outStream write:data.bytes maxLength:data.length];
    
}

#pragma mark ---輸入流 讀取 服務器 返回的數據  XMPP 已經封裝好了，不用咱們處理---
- (void)readData
{
    //創建一個緩衝區，能夠放1024個字節
    uint8_t buf[1024];
    // len 返回實際存放的字節數
    NSInteger len = [_inputStream read:buf maxLength:sizeof(buf)]; //sizeof(buf)
    //把字節轉化成字符串
    NSData *data = [NSData dataWithBytes:buf length:len];
    //轉換成字符串 從服務器接收到的數據
    NSString *recieveString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    //刷新數據
    [self reloadDataWithText:recieveString];
    
    NSLog(@"%@",recieveString);
}

#pragma mark --- 點擊發送按鈕時 獲取文本輸入框的文字，並刷新tableView ---

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    NSString *text = textField.text;
    NSData *data = [text dataUsingEncoding:NSUTF8StringEncoding];
    [self reloadDataWithText:text];
    //發送數據給服務器
    [_outStream write:data.bytes maxLength:data.length];
    //發送完成後，清空文本框
    textField.text = nil;
    return YES;
}

- (void)reloadDataWithText:(NSString *)text
{
    //添加文本輸入框的數據到消息數組中
    [self.chatMsgs addObject:text];
    //刷新
    [self.tableView reloadData];
    //發送一條消息，使tableView跟着向上滾動一行
    NSIndexPath *lastIndexPath = [NSIndexPath indexPathForRow:self.chatMsgs.count - 1 inSection:0];
    [self.tableView scrollToRowAtIndexPath:lastIndexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
    
}

#pragma mark --- 將要拖動時，鍵盤消失---

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

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

- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode
{
#warning mark --- 這是在主線程中執行的
    NSLog(@"%@",[NSThread currentThread]);
    /*
     NSStreamEventNone = 0,
     NSStreamEventOpenCompleted = 1UL << 0, 輸入輸出流打開完成
     NSStreamEventHasBytesAvailable = 1UL << 1, 有字節可讀
     NSStreamEventHasSpaceAvailable = 1UL << 2, 能夠發送字節
     NSStreamEventErrorOccurred = 1UL << 3, 鏈接出現了錯誤
     NSStreamEventEndEncountered = 1UL << 4 鏈接結束
     */
    
    switch (eventCode) {
        case NSStreamEventOpenCompleted:
            NSLog(@" 輸入輸出流打開完成");
            break;
        case NSStreamEventHasBytesAvailable:
            NSLog(@"有字節可讀");
            break;
        case NSStreamEventHasSpaceAvailable:
            NSLog(@"能夠發送字節");
            break;
        case NSStreamEventErrorOccurred:
            NSLog(@"鏈接錯誤");
            break;
        case NSStreamEventEndEncountered:
            NSLog(@"鏈接結束");
            //關閉輸入輸出流
            [_inputStream close];
            [_outStream close];
            
            //從主循環移除
            [_inputStream removeFromRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
            [_outStream removeFromRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
            
            break;
        default:
            break;
    }
    
}


- (void)viewDidLoad {
    [super viewDidLoad];
    
    //監聽鍵盤將要出現時
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillChang:) name:UIKeyboardWillChangeFrameNotification object:nil];
    //監聽鍵盤將要隱藏時
    [[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);
    //鍵盤結束的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
{
    //鍵盤結束的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