需要用到webSocket，所以搜集了一下使用方法，(手动包 导入要把#import<> 改成#import“”)
gitHUB 上没有看懂,就要 cocoaPod 导入了 socketRocket
导入这个包然后添加所需要的框架
导入头文件
#import"SRWebSocket.h"
代码的实现
#import
#import"SocketRocket.h"
@interfaceViewController : UIViewController
@property (nonatomic,strong)SRWebSocket
*
webSocket;
@end
#import"ViewController.h"
@interface
ViewController ()
@property (weak, nonatomic) IBOutlet UILabel
*
showTxt;
@end
@implementation
ViewController
- (void
)viewWillAppear:(BOOL)animated{
[self Reconnect];
}
- (void
)viewDidDisappear:(BOOL)animated{
//Close WebSocket
self.webSocket.delegate=
nil;
[self.webSocket close];
self.webSocket
=
nil;
}
- (void
)viewDidLoad {
[super viewDidLoad];
}
//初始化
- (void
)Reconnect{
self.webSocket.
delegate=
nil;
[self.webSocket close];
self.webSocket
= [[SRWebSocket alloc] initWithURLRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"ws://echo.websocket.org"
]]];
self.webSocket.
delegate=
self;
self.title
=@"Opening Connection..."
;
[self.webSocket open];
}
//成功连接
- (void)webSocketDidOpen:(SRWebSocket *
)webSocket {
NSLog(
@"Websocket Connected"
);
self.title
=@"Connected!"
;
}
//连接失败，打印错误信息
- (void)webSocket:(SRWebSocket *)webSocket didFailWithError:(NSError *
)error {
NSLog(
@":( Websocket Failed With Error %@"
, error);
self.title
=@"Connection Failed! (see logs)"
;
self.webSocket
=
nil;
}
//接收服务器发送信息
- (void)webSocket:(SRWebSocket *)webSocket didReceiveMessage:(id
)message {
NSLog(
@"Received \"%@\""
, message);
self.showTxt.text
=
message;
}
//长连接关闭
- (void)webSocket:(SRWebSocket *)webSocket didCloseWithCode:(NSInteger)code reason:(NSString *
)reason wasClean:(BOOL)wasClean {
NSLog(
@"WebSocket closed"
);
self.title
=@"Connection Closed! (see logs)"
;
self.webSocket
=
nil;
}
//该函数是接收服务器发送的pong消息
- (void)webSocket:(SRWebSocket *)webSocket didReceivePong:(NSData *
)pongPayload {
NSString
*reply =
[[NSString alloc] initWithData:pongPayload encoding:NSUTF8StringEncoding];
NSLog(
@"%@"
,reply);
}
- (IBAction)sendAction:(id
)sender {
[self.view endEditing:YES];
//WebSocket
if
(self.webSocket) {
[self.webSocket send:
@"test success"
];
}
}
有关这个方法需要说一下
-(void)webSocket:(SRWebSocket *)webSocket didReceivePong:(NSData *
)pongPayload{
socketPong
= socketPong +1
;
}
其中最后一个是接受pong消息的，在这里就要提一下心跳包，一般情况下建立长连接都会建立一个心跳包，用于每隔一段时间通知一次服务端，客户端还是在线，这个心跳包其实就是一个ping消息，我的理解就是建立一个定时器，每隔十秒或者十五秒向服务端发送一个ping消息，这个消息可是是空的，例如
NSData * data = [[NSData alloc]init];
[_webSocket sendPing:data];
发送过去消息以后，服务器会返回一个pong消息，这个消息是解读不了的，但是每次返回时就会调用-(void)webSocket:(SRWebSocket *)webSocket didReceivePong:(NSData *)pongPayload这个函数，如果要用到话，可以像我做的那样，直接在该函数里面统计一下收到的次数，跟发送的次数比较，如果每次发送之前，自己发送的ping消息的个数，跟收到pong消息的个数相同，那就代表一直在连接状态，但是服务器发送pong消息时候是自动发送的，服务器是看不到客户端发送的ping消息的，同理，服务端也一样，只要服务端建立有心跳连接，那么服务端也是一直在发送ping消息，客户端一直在回复pong消息，这两个消息是处理不了的，没办法解读这个歌消息体里面的内容。还有一点就是在发送ping消息的时候，如果非要想在里面加入一些参数，这个参数不能太大，太大的话，会提示发送失败
详细需要更多了解请联系本人
Demo示例(加入聊天室):
#pragma mark - SRWebSocketDelegate
- (void)Reconnect {
//webSocket
self.webSocket.delegate = nil;
[self.webSocket close];
self.webSocket = [[SRWebSocket alloc] initWithURLRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@:7272",webChatURL]]]];
self.webSocket.delegate = self;
MYLog(@"Opening Connection...");
[self.webSocket open];
}
- (void)webSocketDidOpen:(SRWebSocket *)webSocket;{
MYLog(@"Websocket Connected");
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:@{@"type":@"login",@"client_name":@"QL",@"room_id":@"dududache"} options:NSJSONWritingPrettyPrinted error:&error];
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
[webSocket sendString:jsonString error:&error];
}
- (void)webSocket:(SRWebSocket *)webSocket didFailWithError:(NSError *)error;{
MYLog(@":( Websocket Failed With Error %@", error);
webSocket = nil;
}
- (void)webSocket:(SRWebSocket *)webSocket didReceiveMessage:(id)message;{
MYLog(@"Received \"%@\"", message);
}
- (void)webSocket:(SRWebSocket *)webSocket didCloseWithCode:(NSInteger)code reason:(NSString *)reason wasClean:(BOOL)wasClean;{
MYLog(@"WebSocket closed");
webSocket = nil;
}
网友评论
我想问一下这个protocols是干什么用的