Unable to access protocol methods via delegate

Question

While accessing protocol methods via delegate I'm getting following error: "No known instance method for selector 'lostConnection'"

Swift Protocol:

@objc protocol GameDelegate {
    func lostConnection()
}

Objective C game file

//game.h

@protocol GameDelegate;
@interface SSStreamManager : NSObject 

@property (assign) id<GameDelegate> delegate

@end

Getting error while calling protocol methods

[self.delegate lostConnection]; // No known instance method for selector 'lostConnection'

Answer 1

You haven't shown any real code, but here's an example that will get you started. These are the three files in an iOS app project:

ViewController.swift

import UIKit
@objc protocol GameDelegate {
    func lostConnection()
}
class ViewController: UIViewController {
}

Thing.h

#import <Foundation/Foundation.h>
@protocol GameDelegate;
@interface Thing : NSObject
@property (assign) id<GameDelegate> delegate;
@end

Thing.m

#import "Thing.h"
#import "MyApp-Swift.h"
@implementation Thing
- (void) test {
    [self.delegate lostConnection];
}
@end

That compiles. You should be able to follow this model in your own code.