如何在本地保存SKProduct对象？ [英] How to save SKProduct object locally?

问题描述

我已尝试保存SKProduct对象，并将其与类NSKeyedArchiver一起存档，但会生成 - [SKProduct encodeWithCoder：]：无法识别的选择器发送到实例的错误。

I have tried to save a SKProduct object with archiving it with the class NSKeyedArchiver but it generates an error as -[SKProduct encodeWithCoder:]: unrecognized selector sent to instance.

+ (void)saveProduct:(SKProduct *)product
{
     NSData *data = [NSKeyedArchiver archivedDataWithRootObject:product];
    [[NSUserDefaults standardUserDefaults] setValue:data forKey:PRODUCT];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

有没有办法保存SKProduct的实例？

Is there a way to save an instance of SKProduct or not?

推荐答案

您的SKProduct类需要符合NSCoding协议。

Your SKProduct class needs to conform to the NSCoding protocol.

换句话说，您需要在SKProduct类中填写这两个方法。

In other words you need to fill out these two methods in your SKProduct class.

• （void）encodeWithCoder：（NSCoder *）aCoder;


• （id）initWithCoder：（NSCoder *）aDecoder;

这将带你的SKProduct类，并将其分解，以便它可以序列化和反序列化。

This will take your SKProduct class and break it down so that it can be serialized and unserialized.

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