[英]iOS swift application using GCDAsyncUdpSocket
I'm very new to building iOS apps. 我是开发iOS应用程序的新手。
I'm trying to make a class to receive udp multicast messages, but I can't seam to get it working at all... 我正在尝试创建一个类来接收udp多播消息,但是我无法缝制使其完全正常工作...
class Discovery : GCDAsyncUdpSocketDelegate{
var udpSocket:GCDAsyncUdpSocket!;
init() {
udpSocket = GCDAsyncUdpSocket(delegate: self, delegateQueue: dispatch_get_main_queue())
var e:NSErrorPointer = nil;
//Binding to port
if(!udpSocket.bindToPort(2025, error: e)){
println(e);
return;
}
//Joining multicast group
if(!udpSocket.joinMulticastGroup("239.5.6.7", error: e)){
println(e);
return;
}
//Begin recieve
if(!udpSocket.beginReceiving(e)){
println(e);
return;
}
println("UDP socket was opened!")
}
func udpSocket(sock: GCDAsyncUdpSocket!, didReceiveData data: NSData!, fromAddress address: NSData!, withFilterContext filterContext: AnyObject!) {
println("Got data!");
}
}
Can anyone see where I'm making a mistake? 有人可以看到我在哪里犯错吗? I'm getting the UDP socket was opened msg, but not receiving any packages.
我正在打开UDP套接字已打开msg,但未收到任何包。 I know they are being sent as I'm capturing them with wireshark.
我知道他们正在被发送,因为我正在用wireshark捕获它们。
The discovery is called from my view controller 发现是从我的视图控制器调用的
class ViewController: UIViewController, CLLocationManagerDelegate {
let peer = Peer(id: NSUUID.new())
let uuid = NSUUID.new()
let discovery:Discovery = Discovery()
let locationManager = CLLocationManager()
let region = CLBeaconRegion(proximityUUID: NSUUID(UUIDString: "8DEEFBB9-F738-4297-8040-96668BB44281"), identifier: "Roximity")
let com = OconCom()
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self;
if (CLLocationManager.authorizationStatus() != CLAuthorizationStatus.AuthorizedAlways) {
locationManager.requestAlwaysAuthorization()
}
locationManager.startMonitoringForRegion(region) //Background
locationManager.startRangingBeaconsInRegion(region) //Foreground
}
Any suggestion will be helpful. 任何建议都会有所帮助。
Is your receiver on the same network as the broadcaster. 您的接收者和广播者是否在同一网络上? Generally multicast has a low TTL and can't make it too far unless the routers your packets traverse are configured to allow it.
通常,多播具有较低的TTL,除非将您的数据包遍历的路由器配置为允许它,否则TTL不能太高。
I was running into the same issue in my custom class. 我在自定义课程中遇到了同样的问题。 Simply add @obj public to your delegate functions.
只需将@obj public添加到您的委托函数中。 Now the delegate will be called properly.
现在将正确调用该代表。
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