本文介绍了如何归档和取消归档Swift中的自定义对象?或者如何保存自定义对象到NSUserDefaults在Swift?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个类
class Player { var name = "" func encodeWithCoder(encoder: NSCoder) { encoder.encodeObject(name) } func initWithCoder(decoder: NSCoder) -> Player { self.name = decoder.decodeObjectForKey("name") as String return self } init(coder aDecoder: NSCoder!) { self.name = aDecoder.decodeObjectForKey("name") as String } init(name: String) { self.name = name } },我想序列化并保存为用户默认值。
and i want to serialise it and save to user defaults.
首先我不知道如何正确编写编码器和解码器。所以对于init我写了两个方法。
First of all I'm not sure how to correctly write encoder and decoder. So for init i wrote two methods.
当我尝试执行这个代码:
When i try to execute this code:
func saveUserData() { let player1 = Player(name: "player1") let myEncodedObject = NSKeyedArchiver.archivedDataWithRootObject(player1) NSUserDefaults.standardUserDefaults().setObject(myEncodedObject, forKey: "player") }
app crashes and i get this message:
*** NSForwarding: warning: object 0xebf0000 of class '_TtC6GameOn6Player' does not implement methodSignatureForSelector: -- trouble ahead我做错了什么?
推荐答案NSKeyedArchiver只能使用Objective-C类,而不是纯Swift类。您可以通过使用 @objc 属性标记类或通过继承Objective-C类,例如 NSObject 。
NSKeyedArchiver will only work with Objective-C classes, not pure Swift classes. You can bridge your class to Obj-C by marking it with the @objc attribute or by inheriting from an Objective-C class, such as NSObject.
请参阅使用Swift与Cocoa和Objective-C 了解更多信息。
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如何归档和取消归档Swift中的自定义对象?或者如何保存自定义对象到NSUserDefaults在Swift?
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