Data persistence plays an important role in mobile app development as it allows us to save data from the app on the device so that it can still be accessed after the app is closed. In iOS development, NSKeyedArchiver is a commonly used data archiving method, which can convert custom objects and data structures into binary data and store them persistently. This article will introduce how to use NSKeyedArchiver for data archiving, with corresponding sample code.
First, we need to create a custom data model class, which needs to follow the NSCoding protocol. The NSCoding protocol requires the implementation of two methods: encode(with:)and init(coder:). encode(with:)Methods are used to encode an object's properties into binary data, while init(coder:)methods are used to decode and initialize an object's properties from binary data. The following is an example custom data model class:
class Person: NSObject, NSCoding {
var name: String
var