Question

Swift 3.0

我可以通过Wifi使用Multipeer Connectivity而不是蓝牙共享从iPhone到iPhone的数据，而且我认为Wifi不稳定。
Wifi将连接一半的时间，蓝牙将看到对等，但不会连接。
什么是将iPhone连接到iPhone，iPhone连接到本地任何其他类型电话的最佳方式。一个例子是没有互联网或没有Wifi。我最终也会将数据发送到服务器，并从该服务器接收数据。

这会给我3个连接选择：

1.Private使用（蓝牙）？站在一起并排
2.半私人使用（Wifi）办公室到办公室
3.全球公共使用（互联网）

这个代码对蓝牙连接有误吗？

import UIKit
import MultipeerConnectivity



class ViewController: UIViewController, MCSessionDelegate, MCBrowserViewControllerDelegate,  UINavigationControllerDelegate , UIImagePickerControllerDelegate{



//MARK: - Variables
var myDictionary:NSDictionary = [:]

//Variables for Peer to Peer.
var browser   : MCBrowserViewController!
var assistant : MCAdvertiserAssistant!
var session   : MCSession!
var peerID    : MCPeerID!

//Variables for Peer to Peer.
let imagePicker  = UIImagePickerController()
var imageDataVar: NSData!



//MARK: - Labels
@IBOutlet weak var firstNameLabel: UILabel!
@IBOutlet weak var lastNameLabel:  UILabel!

//MARK: - TextFields
@IBOutlet weak var fistNameTextField: UITextField!
@IBOutlet weak var lastNameTextField: UITextField!

//MARK: - Outlets

@IBOutlet weak var contactImageView: UIImageView!

//MARK: - Buttons
@IBAction func openPortButton(_ sender: AnyObject) {
    self.present(self.browser, animated: true, completion: nil)
}

@IBAction func sendButton(_ sender: AnyObject) {
    sendInfo()
}

@IBAction func getImage(_ sender: AnyObject) {
    chooseImageContact()
}



//MARK: - ViewDidLoad
override func viewDidLoad() {
    super.viewDidLoad()
    loadPeerToPeer()
}


//MARK: - Functions
func sendInfo() {
    if self.session.connectedPeers.count > 0 {
        let firstNameVar = fistNameTextField.text!
        let lastNameVar = lastNameTextField.text!
            myDictionary = ["itemA" : "\(firstNameVar)", "itemB" : "\(lastNameVar)", "itemC" : imageDataVar]
        do {
            let data =  NSKeyedArchiver.archivedData(withRootObject: myDictionary)
            try self.session.send(data, toPeers: self.session.connectedPeers, with: MCSessionSendDataMode.unreliable)
        } catch let error as NSError {
            let ac = UIAlertController(title: "Send error", message: error.localizedDescription, preferredStyle: .alert)
            ac.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
            present(ac, animated: true, completion: nil)
        }
    }
}


// Called when a peer sends an NSData to us
func session(_ session: MCSession, didReceive data: Data, fromPeer peerID: MCPeerID) {

    // This needs to run on the main queue
    DispatchQueue.main.async {
        self.myDictionary = NSKeyedUnarchiver.unarchiveObject(with: data) as! NSDictionary

        self.firstNameLabel.text    = self.myDictionary.value(forKey: "itemA") as? String
        self.lastNameLabel.text     = self.myDictionary.value(forKey: "itemB") as? String
        let image                   = self.myDictionary.value(forKey: "itemC") as? NSData
        let newContactImage:UIImage = UIImage(data: image! as Data)!
        let smallPicture            = self.scaleContactImageWith(newContactImage, newSize: CGSize(width: 100, height: 100))
        var sizeOfImage:CGRect      = self.contactImageView.frame
            sizeOfImage.size        = smallPicture.size
        self.contactImageView.frame = sizeOfImage
        self.contactImageView.image = smallPicture
    }
}


func browserViewControllerDidFinish(_ browserViewController: MCBrowserViewController) {
    dismiss(animated: true, completion: nil)
}
func browserViewControllerWasCancelled(_ browserViewController: MCBrowserViewController) {
    dismiss(animated: true, completion: nil)
}
func browserViewController(_ browserViewController: MCBrowserViewController, shouldPresentNearbyPeer peerID: MCPeerID, withDiscoveryInfo info: [String : String]?) -> Bool {
    return true
}

func session(_ session: MCSession, peer peerID: MCPeerID, didChange state: MCSessionState) {
    switch state {
    case MCSessionState.connected:
        print("Connected: \(peerID.displayName)")
    case MCSessionState.connecting:
        print("Connecting: \(peerID.displayName)")
    case MCSessionState.notConnected:
        print("Not Connected: \(peerID.displayName)")
    }
}

func session(_ session: MCSession, didStartReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, with progress: Progress) {
}
func session(_ session: MCSession, didFinishReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, at localURL: URL, withError error: Error?) {
}
func session(_ session: MCSession, didReceive stream: InputStream, withName streamName: String, fromPeer peerID: MCPeerID) {
}

func textFieldShouldReturn(_ textField: UITextField) -> Bool {
    textField.resignFirstResponder()
    return true
}



func loadPeerToPeer(){
    self.peerID  = MCPeerID(displayName: UIDevice.current.name)
    self.session = MCSession(peer: peerID, securityIdentity: nil, encryptionPreference: .required)
    self.session = MCSession(peer: self.peerID)
    self.session.delegate = self
    self.assistant = MCAdvertiserAssistant(serviceType:"VBC-ShareCard", discoveryInfo:nil, session:self.session)
    self.assistant.start()
    self.browser = MCBrowserViewController(serviceType: "VBC-ShareCard", session: self.session)
    self.browser.delegate = self
}

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
    picker.dismiss(animated: true, completion: nil)
}


// Picking the image
func chooseImageContact(){
    let imagePicker            = UIImagePickerController()
        imagePicker.delegate   = self
        imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary
    self.present(imagePicker, animated: true, completion: nil)
}


//Scalling the image
func scaleContactImageWith(_ image:UIImage, newSize:CGSize)->UIImage{
        UIGraphicsBeginImageContextWithOptions(newSize, false, 0.0)
        image.draw(in: CGRect(x: 0, y: 0, width: newSize.width, height: newSize.height))
    let newContactImage:UIImage = UIGraphicsGetImageFromCurrentImageContext()!
        UIGraphicsEndImageContext()
    return newContactImage
}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

    //This gets the Contact image inside the imagePickerController
    let pickedImage:UIImage     = info[UIImagePickerControllerOriginalImage] as! UIImage
    let smallPicture            = scaleContactImageWith(pickedImage, newSize: CGSize(width: 100, height: 100))
    var sizeOfImage:CGRect      = contactImageView.frame
        sizeOfImage.size        = smallPicture.size
        contactImageView.frame  = sizeOfImage
        picker.dismiss(animated: true, completion: nil)
        contactImageView.image  = smallPicture as UIImage
    let test : Data             = UIImagePNGRepresentation(smallPicture)!
        imageDataVar            = test as NSData!
}

}

Answer 1

蓝牙问题在于测试蓝牙连接而不是代码。我发现在Swift 3.0（我正在运行）中你无法关闭Wifi并进行测试你必须进入设置＆gt;然后选择Wi-Fi连接到的Wi-Fi /网络。然后选择忘记此网络。

即使您现在没有Wi-Fi /网络，也必须打开WiFi本身和蓝牙。

Answer 2

我发现这是为了获得Wi-Fi ID。这可能对你有用。如果有一个ID，那么如果没有做任何事情，那就做其他事。

func getWiFiSsid() -> String? {
    var ssid: String?
    if let interfaces = CNCopySupportedInterfaces() as NSArray? {
        for interface in interfaces {
            if let interfaceInfo = CNCopyCurrentNetworkInfo(interface as! CFString) as NSDictionary? {
                ssid = interfaceInfo[kCNNetworkInfoKeySSID as String] as? String
                break
            }
        }
    }
    print(ssid as Any, "This is/is not the ssid" as Any)
    return ssid
}

无法通过Multipeer Connectivity连接蓝牙

2 个答案: