gistfile1.m

@implementation InterfaceController
{
    SRWebSocket *_webSocket;
}

- (void)awakeWithContext:(id)context {
    [super awakeWithContext:context];
}

- (IBAction)didOpen {
    [_webSocket send:@"1"];
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(500 * NSEC_PER_MSEC)), dispatch_get_main_queue(), ^{
        [_webSocket send:@"0"];
    });
}

- (void)willActivate {
    // This method is called when watch view controller is about to be visible to user
    [super willActivate];
    
    [_webSocket close];
    _webSocket = nil;
    
    _webSocket = [[SRWebSocket alloc] initWithURL:[NSURL URLWithString:API_URL]];
    _webSocket.delegate = self;
    [_webSocket open];
}

- (void)didDeactivate {
    // This method is called when watch view controller is no longer visible
    [super didDeactivate];
    
    if (_webSocket) {
        [_webSocket send:@"0"];
    }

    [_webSocket close];
    _webSocket = nil;
}

@end