我正在尝试使用 GCDAsyncSocket 快速编写一个 TCP 套接字客户端，但我遇到了一个问题。在我的代码中，我有一个 NSTextField(称为框)，这是我的代码:
import Cocoa
class AppDelegate: NSObject, NSApplicationDelegate
{
@IBOutlet weak var window: NSWindow!
@IBOutlet weak var box: NSTextField!
var bsocket: GCDAsyncSocket!
func applicationDidFinishLaunching(aNotification: NSNotification?)
{
bsocket = GCDAsyncSocket(delegate: self, delegateQueue: dispatch_get_main_queue())
var port:UInt16 = 8090
if (!bsocket.connectToHost("localhost", onPort: port, error: nil))
{
println("Error")
}
else
{
println("Connecting...")
}
var request:String = "Arn.Preg:3302:"
var data:NSData = request.dataUsingEncoding(NSUTF8StringEncoding)!
bsocket.writeData(data, withTimeout: -1.0, tag: 0)
bsocket.readDataWithTimeout(-1.0, tag: 0)
}
func applicationWillTerminate(aNotification: NSNotification?)
{
// Insert code here to tear down your application
}
func socket(socket : GCDAsyncSocket, didReadData data:NSData, withTag tag:UInt16)
{
var response = NSString(data: data, encoding: NSUTF8StringEncoding)
println("Received Response")
box.stringValue = box.stringValue + "\n" + response
}
func socket(socket : GCDAsyncSocket, didConnectToHost host:String, port p:UInt16)
{
println("Connected to \(host) on port \(p).")
box.stringValue = box.stringValue + "\n" + "Connected to \(host) on port \(p)."
}
}
func socket(socket : GCDAsyncSocket, didReadData data:NSData, withTag tag:UInt16)
当我在终端中使用 telnet 命令尝试访问我的 TCP 服务器时，这是结果。
Marzuk:~ marzukrashid$ telnet localhost 8090
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Arn.TipoSer:XPL0:
然后，当我输入“Arn.Preg:3302:”时，服务器返回:
Marzuk:~ marzukrashid$ telnet localhost 8090
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Arn.TipoSer:XPL0:
Arn.Preg:3302:
Arn.Resp:3302=329351:
当我输入“Arn.Preg:3302:”时，服务器返回“Arn.Resp:3302=329351:”，这是我想要达到的结果，我希望我的应用程序中的 NSTextField 显示“Arn .Resp:3302=329351:”。现在，当我运行我的代码时，程序会记录“正在连接...”、“已连接到端口 8090 上的 127.0.0.1”和“已收到响应”，并且在应用程序本身的 NSTextField 中，它显示“已连接到端口 8090 上的 127.0.0.1”。和“Arn.TipoSer:XPl0:”，但它没有像我想要的那样显示“Arn.Resp:3302=329351:”。
我的问题是为什么我的代码没有执行此操作，以及如何修复我的代码以执行此操作。
谢谢。
最佳答案
我了解到didReadData函数只有在readDataWithTimeout函数运行时才会运行，所以我在didConnectToHost、didReadData和applicationDidFinishLaunching中添加了readDataWithTimeout函数。我了解到在请求的末尾需要一个“\n”来给出终端中使用的返回击键，所以我将“\n”添加到“Arn.Preg:3302:”使其成为“Arn.Preg :3302:\n"。最终代码如下所示:
import Cocoa
class AppDelegate: NSObject, NSApplicationDelegate {
@IBOutlet weak var window: NSWindow!
@IBOutlet weak var box: NSTextField!
//let bsocket = GCDAsyncSocket(delegate: AppDelegate.self, delegateQueue: dispatch_get_main_queue())
var bsocket: GCDAsyncSocket!
func applicationDidFinishLaunching(aNotification: NSNotification?)
{
bsocket = GCDAsyncSocket(delegate: self, delegateQueue: dispatch_get_main_queue())
var port:UInt16 = 8090
if (!bsocket.connectToHost("localhost", onPort: port, error: nil))
{
println("Error.")
}
else
{
println("Connecting...")
}
bsocket.readDataWithTimeout(-1.0, tag: 0)
}
func applicationWillTerminate(aNotification: NSNotification?) {
// Insert code here to tear down your application
}
func socket(socket : GCDAsyncSocket, didReadData data:NSData, withTag tag:UInt16)
{
var response = NSString(data: data, encoding: NSUTF8StringEncoding)
println("Received Response")
box.stringValue = box.stringValue + "\n" + response
bsocket.readDataWithTimeout(-1.0, tag: 0)
}
func socket(socket : GCDAsyncSocket, didConnectToHost host:String, port p:UInt16)
{
println("Connected to \(host) on port \(p).")
box.stringValue = box.stringValue + "\n" + "Connected to \(host) on port \(p)."
bsocket.readDataWithTimeout(-1.0, tag: 0)
sendRequest()
}
func sendRequest()
{
var request:String = "Arn.Preg:3302:\n"
var data:NSData = request.dataUsingEncoding(NSUTF8StringEncoding)!
bsocket.writeData(data, withTimeout: -1.0, tag: 0)
}
}
关于xcode - 从 Swift 客户端上的 TCP 服务器获取响应，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25732590/