@objc協議崩潰swift編譯器

Question

我寫了I協議，它的目的是有一些@optional方法，但swift編譯器崩潰。這工作：

protocol SessionDelegate { 

    // TODO these should all be optional 
    func willOpenSession(session: Session); 
    func didOpenSession(session: Session); 
    func didFailOpenningSession(session: Session, error: NSError!); 

    func willCloseSession(session: Session); 
    func didCloseSession(session: Session); 
} 

這不：

@objc protocol SessionDelegate { 

    @optional func willOpenSession(session: Session); 
    @optional func didOpenSession(session: Session); 
    @optional func didFailOpenningSession(session: Session, error: NSError!); 

    @optional func willCloseSession(session: Session); 
    @optional func didCloseSession(session: Session); 
} 

老實說，有@objc足以崩潰的編譯器。有什麼解決方法嗎？

Answer 1

現在，您唯一的解決方法是在Objective-C頭文件中聲明協議並通過Objective-C橋接頭導入聲明。

協議聲明：

// SessionDelegate.h 

@class Session; 

@protocol SessionDelegate <NSObject> 

@optional 

- (void)willOpenSession:(Session *)session; 
- (void)didOpenSession:(Session *)session; 
- (void)didFailOpenningSession:(Session *)session error:(NSError *)error; 

- (void)willCloseSession:(Session *)session; 
- (void)didCloseSession:(Session *)session; 

@end 

橋接報頭：在夫特

// MyProject-Bridging-Header.h 

#import "SessionDelegate.h" 

符合類實現：

// Session.swift 

class Session { 
    // ... 
} 

class MySessionDelegate: NSObject, SessionDelegate { 
    func willOpenSession(session: Session) { 
     // ... 
    } 
} 

Answer 2

道歉，從我以前的編輯劃傷，請嘗試以下代替：

@objc(PSessionDelegate) 
protocol PSessionDelegate { 

    @optional func willOpenSession(session: Session); 
    @optional func didOpenSession(session: Session); 
    @optional func didFailOpenningSession(session: Session, error: NSError!); 
    @optional func willCloseSession(session: Session); 
    @optional func didCloseSession(session: Session); 

} 

class ViewController: UIViewController, PSessionDelegate { 

    override func viewDidLoad() { 
     super.viewDidLoad() 
     // Do any additional setup after loading the view, typically from a nib. 

    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 
}