这是使用 Singleton 在 Swift 3 中管理套接字连接的正确方法吗?
我从哪里开始套接字连接,这样我就不必在 Viewcontroller 生命周期中每次都重新连接? Viewcontroller 不断地向我的服务器发送数据;我的应用程序是客户端及其收集数据;它从应用程序内的移动和发送方向、功率等获取数据。
我找了又找,找不到具体的例子;我只找到套接字库,但没有找到任何关于如何将它与 UIViewcontroller 一起使用的示例;还有,网上大部分例子都是用websockets,我不是
有什么建议吗?
我希望这会奏效:
manager.messageReceived(message: "Testing...")
但我担心的是,在 UIViewcontroller 类内部,它会自动再次启动连接;另外,我不确定应该在什么时候检查连接是否丢失以及在哪里重新连接;因为我从不关闭套接字
谢谢
单例类:
import Darwin
import Foundation
class ChatManager {
// Add property for socket
private var control_socket: Int32
private var address = "000.000.0.000"
private var port = "0000"
class var sharedInstance: ChatManager {
struct Singleton { static let instance = ChatManager() }
return Singleton.instance
}
init() {
// Create the socket
self.control_socket = connectToServer(atAddress: self.address, atPort: self.port)
}
func sendMessage(message: String) {
// Push the message onto the socket
_ = write(self.control_socket, message, message.characters.count)
}
// Delegate methods
func messageReceived(message: String) {
// Emit the message using NSNotificationCenter
}
}
UIView Controller :
import Darwin
import Foundation
import UIKit
import Dispatch
class ViewController: UIViewController {
@IBOutlet private weak var joystickMove: Joystick!
@IBOutlet private weak var joystickRotate: Joystick!
private var contour = Contours()
private var contour_index: Int = 0
private let manager = ChatManager.sharedInstance
override func viewDidLoad() {
super.viewDidLoad()
createJoystick()
createContours()
createButton()
}
private func createJoystick() {
var joystick = Joystick()
let n: CGFloat = 100.0
let x: CGFloat = (UIScreen.main.bounds.width/2) - (n/2.0)
let y: CGFloat = UIScreen.main.bounds.height - (UIScreen.main.bounds.height/4.0)
joystick.frame = CGRect(x: x, y: y, width: n, height: n)
joystick.backgroundColor = UIColor.clear
joystick.substrateColor = UIColor.lightGray
joystick.substrateBorderColor = UIColor.gray
joystick.substrateBorderWidth = 1.0
joystick.stickSize = CGSize(width: 50.0, height: 50.0)
joystick.stickColor = UIColor.darkGray
joystick.stickBorderColor = UIColor.black
joystick.stickBorderWidth = 2.0
joystick.fade = 0.5
var packet = ""
joystick.trackingHandler = { (data) -> () in
let power = sqrt(pow(Double(data.velocity.x), 2.0) + pow(Double(data.velocity.y), 2.0))
let theta = atan2(Double(-data.velocity.y), Double(data.velocity.x))
let degrees = theta * (180.0 / M_PI)
if degrees >= 55 && degrees <= 125 { // move forward
packet = "\(1) \(1) \(power) \(power)"
} else if degrees >= -125 && degrees <= -55 { // move backewards
packet = "\(-1) \(-1) \(power) \(power)"
} else if degrees >= -55 && degrees <= 55 { // turn right
packet = "\(1) \(-1) \(power) \(power)"
} else if (degrees >= 125 && degrees <= 180) && (degrees >= -180 && degrees <= -125) { // turn left
packet = "\(-1) \(1) \(power) \(power)"
}
}
manager.messageReceived(message: "Testing...")
view.addSubview(joystick)
}
}
最佳答案
既然是单例,有没有考虑在AppDelegate的应用函数中初始化SocketManager?然后它将在应用程序的生命周期内存在。
关于ios - Swift 3 单例管理器套接字连接,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40748454/