所以，我一直在寻找一个新的教程试图制作一个新的应用程序，但我很难更改打开连接页面的按钮。它现在的方式非常无关紧要。它提供了加入会话或主持会话的选项。我想制作一个按钮，当点击时只需要搜索其他设备而不是现在的功能。像我在链接底部发布的链接。我是swift和编码的初学者，所以如果这是一个愚蠢的问题，我很抱歉。我已经待了一个多月，没有运气。源代码在底部。任何帮助都会很棒。源代码甚至更好。我还“***”我认为是问题的代码块。但我不确定。提前致谢。
https://cdn-images-1.medium.com/max/1600/1*o3prbMNTHO8ZBz3oQejCOA.png
import UIKit
import MultipeerConnectivity
class TodoTableViewController: UITableViewController, TodoCellDelegate,
MCSessionDelegate, MCBrowserViewControllerDelegate {
var todoItems:[TodoItem]!
var peerID:MCPeerID!
var mcSession:MCSession!
var mcAdvertiserAssistant:MCAdvertiserAssistant!
override func viewDidLoad() {
super.viewDidLoad()
loadData()
peerID = MCPeerID(displayName: UIDevice.current.name)
mcSession = MCSession(peer: peerID, securityIdentity: nil, encryptionPreference: .required)
mcSession.delegate = self
}
func loadData(){
todoItems = [TodoItem]()
todoItems = DataManager.loadAll(TodoItem.self).sorted(by: {$0.createdAt < $1.createdAt})
self.tableView.reloadData()
}
@IBAction func addTodo(_ sender: Any) {
let addAlert = UIAlertController(title: "New Todo", message: "Enter a title", preferredStyle: .alert)
addAlert.addTextField { (textfield:UITextField) in
textfield.placeholder = "ToDo Item Title"
}
addAlert.addAction(UIAlertAction(title: "Create", style: .default, handler: { (action:UIAlertAction) in
guard let title = addAlert.textFields?.first?.text else {return}
let newTodo = TodoItem(title: title, completed: false, createdAt: Date(), itemIdentifier: UUID())
newTodo.saveItem()
self.todoItems.append(newTodo)
let indexPath = IndexPath(row: self.tableView.numberOfRows(inSection: 0), section: 0)
self.tableView.insertRows(at: [indexPath], with: .automatic)
}))
addAlert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
self.present(addAlert, animated: true, completion: nil)
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return todoItems.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! TodoTableViewCell
let todoItem = todoItems[indexPath.row]
cell.todoLabel.text = todoItem.title
cell.delegte = self
if todoItem.completed {
cell.todoLabel.attributedText = strikeThroughText(todoItem.title)
}
return cell
}
func didRequestDelete(_ cell: TodoTableViewCell) {
if let indexPath = tableView.indexPath(for: cell) {
todoItems[indexPath.row].deleteItem()
todoItems.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath], with: .automatic)
}
}
func didRequestComplete(_ cell: TodoTableViewCell) {
if let indexPath = tableView.indexPath(for: cell) {
var todoItem = todoItems[indexPath.row]
todoItem.markAsCompleted()
cell.todoLabel.attributedText = strikeThroughText(todoItem.title)
}
}
func didRequestShare(_ cell: TodoTableViewCell) {
if let indexPath = tableView.indexPath(for: cell) {
let todoItem = todoItems[indexPath.row]
sendTodo(todoItem)
}
}
func sendTodo (_ todoItem:TodoItem) {
if mcSession.connectedPeers.count > 0 {
if let todoData = DataManager.loadData(todoItem.itemIdentifier.uuidString) {
do {
try mcSession.send(todoData, toPeers: mcSession.connectedPeers, with: .reliable)
}catch{
fatalError("Could not send todo item")
}
}
}else{
print("you are not connected to another device")
}
}
func strikeThroughText (_ text:String) -> NSAttributedString {
let attributeString: NSMutableAttributedString = NSMutableAttributedString(string: text)
attributeString.addAttribute(NSAttributedStringKey.strikethroughStyle, value: 1, range: NSMakeRange(0, attributeString.length))
return attributeString
}
// MARK: - Multipeer Connectivity
***@IBAction func showConnectivityActions(_ sender: Any) {
let actionSheet = UIAlertController(title: "ToDo Exchange", message: "Do you want to Host or Join a session?", preferredStyle: .actionSheet)
actionSheet.addAction(UIAlertAction(title: "Host Session", style: .default, handler: { (action:UIAlertAction) in
self.mcAdvertiserAssistant = MCAdvertiserAssistant(serviceType: "ba-td", discoveryInfo: nil, session: self.mcSession)
self.mcAdvertiserAssistant.start()
}))
actionSheet.addAction(UIAlertAction(title: "Join Session", style: .default, handler: { (action:UIAlertAction) in
let mcBrowser = MCBrowserViewController(serviceType: "ba-td", session: self.mcSession)
mcBrowser.delegate = self
self.present(mcBrowser, animated: true, completion: nil)
}))
actionSheet.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
self.present(actionSheet, animated: true, completion: nil)
}***
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, didReceive data: Data, fromPeer peerID: MCPeerID) {
do {
let todoItem = try JSONDecoder().decode(TodoItem.self, from: data)
DataManager.save(todoItem, with: todoItem.itemIdentifier.uuidString)
DispatchQueue.main.async {
self.todoItems.append(todoItem)
let indexPath = IndexPath(row: self.tableView.numberOfRows(inSection: 0), section: 0)
self.tableView.insertRows(at: [indexPath], with: .automatic)
}
}catch{
fatalError("Unable to process recieved data")
}
}
func session(_ session: MCSession, didReceive stream: InputStream, withName streamName: String, fromPeer peerID: MCPeerID) {
}
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 browserViewControllerDidFinish(_ browserViewController: MCBrowserViewController) {
dismiss(animated: true, completion: nil)
}
func browserViewControllerWasCancelled(_ browserViewController: MCBrowserViewController) {
dismiss(animated: true, completion: nil)
}