来自 Ray Wenderlich.com http://www.raywenderlich.com/3932/networking-tutorial-for-ios-how-to-create-a-socket-based-iphone-app-and-server 的本教程很好地描述了连接到基本服务器套接字所需的客户端。它不做 websocket 协议中所需的任何握手、心跳和帧，因此它与 websockets 不兼容。您的代码没有显示 websocket 协议所需的任何握手，所以我认为这就是您想要的。如果您需要 websockets，请查看https://github.com/daltoniam/Starscream
以下是我的 Swift 解释的基础知识。我最终得到了一个经理和一个连接：
class Manager : NSObject {
var conn = Connection()
func connect() {
let (host, port) = screen.getAddress()
conn.connect(host, port: port)
}
func disconnect() {
conn.disconnect()
}
func sendMessage(params:[String : AnyObject]) {
let msg = "send_message:" + JSONStringify(params)
let data : NSData = msg.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!
var buffer = [UInt8](count:data.length, repeatedValue:0)
data.getBytes(&buffer)
conn.outputStream.write(UnsafePointer<UInt8>(data.bytes), maxLength: data.length)
}
func JSONStringify(value: AnyObject) -> String {
if NSJSONSerialization.isValidJSONObject(value) {
if let data = NSJSONSerialization.dataWithJSONObject(value, options: nil, error: nil) {
if let string = NSString(data: data, encoding: NSUTF8StringEncoding) {
return string
}
}
}
return ""
}
}
class Connection : NSObject, NSStreamDelegate {
var serverAddress: CFString = "127.0.0.1"
var serverPort: UInt32 = 8443
private var inputStream: NSInputStream!
private var outputStream: NSOutputStream!
func connect(address: CFString, port:UInt32) {
println("connecting...")
var readStream: Unmanaged<CFReadStream>?
var writeStream: Unmanaged<CFWriteStream>?
CFStreamCreatePairWithSocketToHost(nil, address, port, &readStream, &writeStream)
// Documentation suggests readStream and writeStream can be assumed to
// be non-nil. It might be wise to test if either is nil
// and implement error-handling as needed.
self.inputStream = readStream!.takeRetainedValue()
self.outputStream = writeStream!.takeRetainedValue()
self.inputStream.delegate = self
self.outputStream.delegate = self
self.inputStream.scheduleInRunLoop(NSRunLoop.currentRunLoop(), forMode: NSDefaultRunLoopMode)
self.outputStream.scheduleInRunLoop(NSRunLoop.currentRunLoop(), forMode: NSDefaultRunLoopMode)
self.inputStream.open()
self.outputStream.open()
}
func disconnect() {
self.inputStream.close()
self.outputStream.close()
}
func stream(aStream: NSStream, handleEvent eventCode: NSStreamEvent) {
switch (eventCode){
case NSStreamEvent.ErrorOccurred:
NSLog("ErrorOccurred")
case NSStreamEvent.EndEncountered:
NSLog("EndEncountered")
case NSStreamEvent.None:
NSLog("None")
case NSStreamEvent.HasBytesAvailable:
NSLog("HasBytesAvaible")
var buffer = [UInt8](count: 4096, repeatedValue: 0)
while (inputStream.hasBytesAvailable){
var len = inputStream.read(&buffer, maxLength: buffer.count)
if(len > 0){
var output = NSString(bytes: &buffer, length: buffer.count, encoding: NSUTF8StringEncoding)
if (output != ""){
NSLog("server said: %@", output!)
}
} else {
println("empty string from stream")
}
}
case NSStreamEvent.allZeros:
NSLog("allZeros")
case NSStreamEvent.OpenCompleted:
NSLog("OpenCompleted")
case NSStreamEvent.HasSpaceAvailable:
NSLog("HasSpaceAvailable")
default: println("default reached. unknown stream event")
}
}
}
您可能还会发现这些链接对 Swift 中的消息传递很有用：
我不确定此代码中的 JSON 转换是否正常工作。我发现我需要 websockets，所以不再使用它。