我创建了一个符合NSCoding的Swift类。(Xcode 6 GM,Swift 1.0)
import Foundation
private var nextNonce = 1000
class Command: NSCoding {
let nonce: Int
let string: String!
init(string: String) {
self.nonce = nextNonce++
self.string = string
}
required init(coder aDecoder: NSCoder) {
nonce = aDecoder.decodeIntegerForKey("nonce")
string = aDecoder.decodeObjectForKey("string") as String
}
func encodeWithCoder(aCoder: NSCoder) {
aCoder.encodeInteger(nonce, forKey: "nonce")
aCoder.encodeObject(string, forKey: "string")
}
}
但是当我打电话给..。
let data = NSKeyedArchiver.archivedDataWithRootObject(cmd);
它崩溃了,给了我这个错误。
2014-09-12 16:30:00.463 MyApp[30078:60b] *** NSForwarding: warning: object 0x7a04ac70 of class '_TtC8MyApp7Command' does not implement methodSignatureForSelector: -- trouble ahead
Unrecognized selector -[MyApp.Command replacementObjectForKeyedArchiver:]
我该怎么办?
发布于 2014-09-12 17:57:52
虽然NSObject
.类在没有继承的情况下工作,但是为了使用NSCoding
,你必须从类继承
class Command: NSObject, NSCoding {
...
}
太糟糕了,编译器错误信息不是很丰富:(
https://stackoverflow.com/questions/25805599
复制相似问题