［XMPP］简易的聊天室实现［一］

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这几天开始学xmpp，先做了超级简易版，以后慢慢加强

因为是简易的，服务器也是简易的，用py脚本写的服务器

因为我是拿来用的就不放上源码了

首先StoryBoard上面拖一些控件，都是简单的，然后加一下约束，这里就不详细说了

比较要注意的是这里我们把输入框容器view的底部约束连线，等下会用到

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

连接服务器部分我们要定义输入输出流然后加入到runloop中去，记得结束连接的时候要移除

- (IBAction)connentToHost:(UIBarButtonItem *)sender

{

NSString *host = @"10.82.197.21";

int port = 12345;

CFReadStreamRef redStream;

CFWriteStreamRef writeStream;

CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)host, port, &redStream, &writeStream);

_inputStream = (__bridge NSInputStream *)(redStream);

_outputStream = (__bridge NSOutputStream *)(writeStream);

_inputStream.delegate = self;

_outputStream.delegate = self;

[_inputStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];

[_outputStream scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];

[_inputStream open];

[_outputStream open];

}

[_inputStream close];

[_outputStream close];

[_inputStream removeFromRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];

[_outputStream removeFromRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];

然后是登陆，要把NSString转换生NSData

- (IBAction)loginBtnClick:(UIBarButtonItem *)sender

{

//登陆发送数据格式为“iam:username”

//发送消息数据格式为“msg：message”

NSString *loginStr = @"iam:HJ";

NSData *data = [loginStr dataUsingEncoding:NSUTF8StringEncoding];

[_outputStream write:data.bytes maxLength:data.length];

}

我们会实现输入框的代理

UITextFieldDelegate

这样就能够监听确定按钮来发送消息了

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

NSString *msgStr = [NSString stringWithFormat:@"msg:%@",textField.text];

NSData *data = [msgStr dataUsingEncoding:NSUTF8StringEncoding];

[_outputStream write:data.bytes maxLength:data.length];

[self reloadData:msgStr];

textField.text = nil;

return YES;

}

这里输入框位置调整的方法比较新，首先我们监听键盘通知

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

然后在键盘将要弹出的时候改变约束的值

- (void)kbFrmWillChange:(NSNotification *)noti

{

//获取窗口高度

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

//键盘结束的y

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

self.inputViewConstraint.constant = windowsH - kbEnfFrm.origin.y;

}

代码其他部分就不细说了，我把代码上传了github了：

https://github.com/hjandyz/XMPP