带有 Swift 的 Bonjour 服务浏览器不获取 serviceinfo [英] Bonjour Service Browser with Swift does not fetch serviceinfo

问题描述

我要连接的服务是通过 Bonjour 发布的.
我可以使用 Bonjour 浏览器找到所有信息，但是如果我尝试以编程方式收集数据，我得到的唯一值就是服务名称.

The service I want to connect to is published via Bonjour.
I can find all the info with the Bonjour Browser, however if I try to gather the data programmatically, the only value I get, is the name of the service.

设置 NetService 委托并调用函数 netServiceWillPublish.不执行 DidNotPublish 或 DidPublish 函数.

The NetService delegate is set and the function netServiceWillPublish is called. The functions DidNotPublish or DidPublish are not executed.

函数 netServiceBrowser 获取所有已发布的 netService，但所有属性都设置为数据类型的默认值.

The function netServiceBrowser gets all published netServices, but all properties are set to the default value of the datatype.

import UIKit

class BMNSDelegate : NSObject, NetServiceDelegate {
    func netServiceWillPublish(_ sender: NetService) {
        print("netServiceWillPublish:\(sender)");  //This method is called
    }


    func netService(_ sender: NetService, didNotPublish errorDict: [String : NSNumber]){ 
        print("didNotPublish:\(sender)");
    }

    func netServiceDidPublish(_ sender: NetService) {
        print("netServiceDidPublish:\(sender)");
    }
    func netServiceWillResolve(_ sender: NetService) {
        print("netServiceWillResolve:\(sender)");
    }

    func netService(_ sender: NetService, didNotResolve errorDict: [String : NSNumber]) {
        print("netServiceDidNotResolve:\(sender)");
    }

    func netServiceDidResolveAddress(_ sender: NetService) {
        print("netServiceDidResolve:\(sender)");
    }

    func netService(_ sender: NetService, didUpdateTXTRecord data: Data) {
        print("netServiceDidUpdateTXTRecordData:\(sender)");
    }

    func netServiceDidStop(_ sender: NetService) {
        print("netServiceDidStopService:\(sender)");
    }

    func netService(_ sender: NetService,
                    didAcceptConnectionWith inputStream: InputStream,
                    outputStream stream: OutputStream) {
        print("netServiceDidAcceptConnection:\(sender)");
    }
}

class BMBrowserDelegate : NSObject, NetServiceBrowserDelegate, NetServiceDelegate {

    func netServiceBrowser(_ netServiceBrowser: NetServiceBrowser,
                           didFind netService: NetService,
                           moreComing moreServicesComing: Bool) {
        let nsnsdel = BMNSDelegate()
        netService.delegate = nsnsdel
        netService.resolve(withTimeout: 1)
        print(netService.domain) // local.
        print(netService.name) // This property is correct
        print(netService.type) // _http._tcp.
        print(netService.addresses) // Optional([])
        print(netService.hostName) // nil
        print(netService.port) // -1
        print(moreServicesComing) //false
    }

}


let SERVICE_TYPE = "_http._tcp."
let BM_DOMAIN = "local."
let browser = NetServiceBrowser()
let nsbdel = BMBrowserDelegate()
browser.delegate = nsbdel
browser.searchForServices(ofType: SERVICE_TYPE, inDomain:         BM_DOMAIN)
RunLoop.current.run()

推荐答案

错误是在 ServiceBrowserDelegate 函数中找到的服务没有保存在任何地方，因此在函数结束时被丢弃.

The error is that the services which are found in the ServiceBrowserDelegate function are not saved anywhere and therefore are discarded at the end of the function.

我在这里找到了一个工作示例:
httpsrel./Programming-iOS-Book-Examples/blob/61f0c753a080040e4a74b912e6c18dd97fe8bcaa/bk2ch24p853bonjour/ch37p1101bonjour/ViewController.swift

I found a working example here:
https://github.com/mattneub/Programming-iOS-Book-Examples/blob/61f0c753a080040e4a74b912e6c18dd97fe8bcaa/bk2ch24p853bonjour/ch37p1101bonjour/ViewController.swift

class ViewController: UIViewController, NetServiceBrowserDelegate, NetServiceDelegate {
var nsb : NetServiceBrowser!
var services = [NetService]()

@IBAction func doButton (_ sender: Any!) {
    print("listening for services...")
    self.services.removeAll()
    self.nsb = NetServiceBrowser()
    self.nsb.delegate = self
    self.nsb.searchForServices(ofType:"_daap._tcp", inDomain: "")
}

func updateInterface () {
    for service in self.services {
        if service.port == -1 {
            print("service \(service.name) of type \(service.type)" +
                " not yet resolved")
            service.delegate = self
            service.resolve(withTimeout:10)
        } else {
            print("service \(service.name) of type \(service.type)," +
                "port \(service.port), addresses \(service.addresses)")
        }
    }
}

func netServiceDidResolveAddress(_ sender: NetService) {
    self.updateInterface()
}

func netServiceBrowser(_ aNetServiceBrowser: NetServiceBrowser, didFind aNetService: NetService, moreComing: Bool) {
    print("adding a service")
    self.services.append(aNetService)
    if !moreComing {
        self.updateInterface()
    }
}

func netServiceBrowser(_ aNetServiceBrowser: NetServiceBrowser, didRemove aNetService: NetService, moreComing: Bool) {
    if let ix = self.services.index(of:aNetService) {
        self.services.remove(at:ix)
        print("removing a service")
        if !moreComing {
            self.updateInterface()
        }
    }
  }
}

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