錯誤在Swift 3中使用編碼器

我想通過使用NSUserDefaults的@IOButton添加「事件」。錯誤在Swift 3中使用編碼器

在我升級到Swift 3之前，我的代碼運行良好。使用Xcode的「convert」助手，我仍然能夠運行代碼沒有問題。

我已經進一步更新版本以符合Swift 3語法，現在我得到一個錯誤已經更新了語法，我無法弄清楚爲什麼當我嘗試編碼我的對象時出現錯誤。

代碼通過無差錯運行Xcode的轉換：// 對象進口基金會類CalendarEvent：NSObject的{VAR 標題：字符串 VAR dateString：字符串

init(withTitle t : String, andDateString ds : String) { 
     title = t 
     dateString = ds 
    } 
    //get values out of NSUserDefaults 
    init(withCoder coder : NSCoder) { 
     dateString = coder.decodeObject(forKey: "dateString") as! String 
     title = coder.decodeObject(forKey: "title") as! String 
    } 
    //time to put CalendarEvent into NSUserDefaults Key-Value store 
    func encodeWithCoder(_ coder : NSCoder) { 
     coder.encode(dateString, forKey: "dateString") 
     coder.encode(title, forKey: "title") 
    } 
} 


//button action 
@IBAction func addButtonPressed(_ sender : UIBarButtonItem) { 

    let newEvent = "Test Event \(events.count + 1)" 
    let defaultsKey = "\(monthNumber)-\(dayNumber)" 
    let ce = CalendarEvent(withTitle: newEvent, andDateString: defaultsKey) 

    let encodedCE = NSKeyedArchiver.archivedData(withRootObject: ce) 
    events.append(encodedCE as AnyObject) 

    UserDefaults.standard.set(events, forKey: defaultsKey) 
    UserDefaults.standard.synchronize() 

    tableView.reloadData() 
}

更新代碼，給出了一個錯誤：

//object 
class CalendarEvent: NSObject { 
    var title : String 
    var dateString : String 

    init(withTitle t: String, andDateString ds: String) { 
     title = t 
     dateString = ds 
    } 

    required init(coder : NSCoder) { 
     dateString = coder.decodeObject(forKey: "dateString") as! String 
     title = coder.decodeObject(forKey: "title") as! String 
    } 

    func encodeWithCoder(coder : NSCoder) { 
     coder.encode(dateString, forKey: "dateString") 
     coder.encode(title, forKey: "title") 
    } 
} 


//button action 
@IBAction func addButtonPressed(sender: UIBarButtonItem){ 

    let newEvent = "Test Event \(events.count+1)" 
    let defaultsKey = "\(monthNum)-\(dayNum)" 
    let ce = CalendarEvent(withTitle: newEvent, andDateString: defaultsKey) 

    // where the error occurs 
    let encodedCE = NSKeyedArchiver.archivedData(withRootObject: ce) 
    events.append(encodedCE as AnyObject) 

    UserDefaults.standard.object(forKey: defaultsKey) 
    UserDefaults.standard.synchronize() 

    tableView.reloadData() 

}

控制檯輸出：

1-1 
2016-10-07 19:39:26.152 Swift3_TableView_CalApp[1400:287793] -[Swift3_TableView_CalApp.CalendarEvent encodeWithCoder:]: unrecognized selector sent to instance 0x60800026ebc0 
2016-10-07 19:39:26.171 Swift3_TableView_CalApp[1400:287793] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Swift3_TableView_CalApp.CalendarEvent encodeWithCoder:]: unrecognized selector sent to instance 0x60800026ebc0' 
*** First throw call stack: 
(
0 CoreFoundation      0x0000000102d3d34b __exceptionPreprocess + 171 
1 libobjc.A.dylib      0x000000010279e21e objc_exception_throw + 48 
2 CoreFoundation      0x0000000102dacf34 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132 
3 CoreFoundation      0x0000000102cc2c15 ___forwarding___ + 1013 
4 CoreFoundation      0x0000000102cc2798 _CF_forwarding_prep_0 + 120 
5 Foundation       0x00000001022d755c _encodeObject + 1263 
6 Foundation       0x000000010230c29a +[NSKeyedArchiver archivedDataWithRootObject:] + 156 
7 Swift3_TableView_CalApp    0x00000001021ad1b0 _TFC23Swift3_TableView_CalApp12SingleDayTVC16addButtonPressedfT6senderCSo15UIBarButtonItem_T_ + 976 
8 Swift3_TableView_CalApp    0x00000001021ad7aa _TToFC23Swift3_TableView_CalApp12SingleDayTVC16addButtonPressedfT6senderCSo15UIBarButtonItem_T_ + 58 
9 UIKit        0x0000000103162b88 -[UIApplication sendAction:to:from:forEvent:] + 83 
10 UIKit        0x00000001035a384d -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 149 
11 UIKit        0x0000000103162b88 -[UIApplication sendAction:to:from:forEvent:] + 83 
12 UIKit        0x00000001032e82b2 -[UIControl sendAction:to:forEvent:] + 67 
13 UIKit        0x00000001032e85cb -[UIControl _sendActionsForEvents:withEvent:] + 444 
14 UIKit        0x00000001032e8755 -[UIControl _sendActionsForEvents:withEvent:] + 838 
15 UIKit        0x00000001032e74c7 -[UIControl touchesEnded:withEvent:] + 668 
16 UIKit        0x00000001031d00d5 -[UIWindow _sendTouchesForEvent:] + 2747 
17 UIKit        0x00000001031d17c3 -[UIWindow sendEvent:] + 4011 
18 UIKit        0x000000010317ea33 -[UIApplication sendEvent:] + 371 
19 UIKit        0x0000000103970b6d __dispatchPreprocessedEventFromEventQueue + 3248 
20 UIKit        0x0000000103969817 __handleEventQueue + 4879 
21 CoreFoundation      0x0000000102ce2311 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 
22 CoreFoundation      0x0000000102cc759c __CFRunLoopDoSources0 + 556 
23 CoreFoundation      0x0000000102cc6a86 __CFRunLoopRun + 918 
24 CoreFoundation      0x0000000102cc6494 CFRunLoopRunSpecific + 420 
25 GraphicsServices     0x00000001072e6a6f GSEventRunModal + 161 
26 UIKit        0x0000000103160f34 UIApplicationMain + 159 
27 Swift3_TableView_CalApp    0x00000001021a913f main + 111 
28 libdyld.dylib      0x000000010636768d start + 1 
) 
libc++abi.dylib: terminating with uncaught exception of type NSException 
(lldb)

我什麼都沒見到？

來源

2016-10-08 moni15

func encodeWithCoder(coder : NSCoder) {

已更名斯威夫特3

func encode(with aCoder: NSCoder)

來源

2016-10-08 01:28:26 neprocker

錯誤在Swift 3中使用編碼器

回答

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