我正在努力将我的代码从 Swift 2.X 迁移到 3.X，并且已经解决了大部分运行时错误，除了不断出现的错误。 我拥有所有必需的功能，并已清理和删除派生数据，但它仍然说我的类不符合“MCSessionDelegate”。 `
import MultipeerConnectivity
import Foundation
class Cashier: Advertiser
{
var waiterBecomesConnectedHandler: ((MCPeerID) -> Void)?
var waiterBecomesDisconnectedHandler: ((MCPeerID) -> Void)?
}
extension Cashier: MCSessionDelegate
{
@available(iOS 7.0, *)
func session(_ session: MCSession, didStartReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, with progress: Progress) {
}
@available(iOS 7.0, *)
func session(_ session: MCSession, peer peerID: MCPeerID, didChange state: MCSessionState) {
switch state {
case .notConnected:
waiterBecomesDisconnectedHandler?(peerID)
connectedPeerSessions.removeValue(forKey: peerID)
break
case .connected:
waiterBecomesConnectedHandler?(peerID)
break
case .connecting:
break
}
}
@available(iOS 7.0, *)
func session(_ session: MCSession, didReceive data: Data, fromPeer peerID: MCPeerID) {
}
@available(iOS 7.0, *)
func session(_ session: MCSession, didReceive stream: InputStream, withName streamName: String, fromPeer peerID: MCPeerID) {
}
@available(iOS 7.0, *)
func session(_ session: MCSession, didFinishReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, at localURL: URL, withError error: Error?){
}
}`
这是协议(protocol)的代码 `
// Delegate methods for MCSession.
public protocol MCSessionDelegate : NSObjectProtocol {
// Remote peer changed state.
@available(iOS 7.0, *)
public func session(_ session: MCSession, peer peerID: MCPeerID, didChange state: MCSessionState)
// Received data from remote peer.
@available(iOS 7.0, *)
public func session(_ session: MCSession, didReceive data: Data, fromPeer peerID: MCPeerID)
// Received a byte stream from remote peer.
@available(iOS 7.0, *)
public func session(_ session: MCSession, didReceive stream: InputStream, withName streamName: String, fromPeer peerID: MCPeerID)
// Start receiving a resource from remote peer.
@available(iOS 7.0, *)
public func session(_ session: MCSession, didStartReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, with progress: Progress)
// Finished receiving a resource from remote peer and saved the content
// in a temporary location - the app is responsible for moving the file
// to a permanent location within its sandbox.
@available(iOS 7.0, *)
public func session(_ session: MCSession, didFinishReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, at localURL: URL, withError error: Error?)
// Made first contact with peer and have identity information about the
// remote peer (certificate may be nil).
@available(iOS 7.0, *)
optional public func session(_ session: MCSession, didReceiveCertificate certificate: [Any]?, fromPeer peerID: MCPeerID, certificateHandler: @escaping (Bool) -> Swift.Void)
}`
最佳答案
从扩展中删除所有功能
extension Cashier: MCSessionDelegate.- 您会看到缺少 subs 的错误，点击修复选项，它会自动添加所有必需的功能
- 如果上述 2 个步骤不起作用，请尝试清理构建文件夹并重新启动 Xcode
关于swift - 类型 'Class' 不符合协议(protocol) 'MCSessionDelegate'，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/51814325/