Question

我想归档一个使用简单枚举作为密钥的字典：

 public enum DaysOfWeek: Int, Codable {
    case Sunday = 1
    case Monday
    case Tuesday
    case Wednesday
    case Thursday
    case Friday
    case Saturday
}

字典是：

var myDict: Dictionary<DaysOfWeek, [SomeDataType]>

我尝试过编码：

        aCoder.encode(myDict, forKey: "MyKey")

但是这会导致匿名的NSException错误：

libc++abi.dylib: terminating with uncaught exception of type NSException

（lldb）bt * thread＃1，queue ='com.apple.main-thread'，stop reason = signal SIGABRT 帧＃0：0x0000000183b75348 libsystem_kernel.dylib __pthread_kill + 8 frame #1: 0x0000000183c89344 libsystem_pthread.dylib pthread_kill $ VARIANT $ mp + 396 第2帧：0x0000000183ae4fb8 libsystem_c.dylib abort + 140 frame #3: 0x0000000183284068 libc++abi.dylib abort_message + 132 第4帧：0x0000000183284210 libc ++ abi.dylib default_terminate_handler() + 304 frame #5: 0x00000001832ac810 libobjc.A.dylib _ objc_terminate（）+ 124 帧＃6：0x000000018329c54c libc ++ abi.dylib std::__terminate(void (*)()) + 16 frame #7: 0x000000018329c158 libc++abi.dylib __ cxa_rethrow + 144 帧＃8：0x00000001832ac6e8 libobjc.A.dylib objc_exception_rethrow + 44 frame #9: 0x0000000183f24024 CoreFoundation CFRunLoopRunSpecific + 544 帧＃10：0x0000000185dbbf84 GraphicsServices GSEventRunModal + 100 frame #11: 0x000000018d4f82f4 UIKit UIApplicationMain + 208 *帧＃12：0x00000001026fbe98 CycleTrainer main at AppDelegate.swift:18 frame #13: 0x0000000183a4656c libdyld.dylib开始+ 4

我缺少什么？

Answer 1

为什么不使用枚举的rawValue代替？因此，您将能够对字典进行编码。

var myDict: [Int: SomeDataType] = [:]
myDict[DaysOfWeek.Tuesday.rawValue] = SomeDataType() // Assign some encodable data type.

NSKeyedArchiver - 归档使用枚举作为键的字典

1 个答案: