archiverootobject 和 unarchiverootobject 的有效文件路径 [英] Valid file path for archiverootobject and unarchiverootobject

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问题描述

I am making an iPhone app and in a previous question I was told that I needed a valid file path for archiverootobject and unarchiverootobject but I don't know how to make one. So what is a valid file path to save arrays of custom classes?

Follow up question: On the linked question I have set up my methods to use invalid saves but it still works would anyone know why?

解决方案

You can save it to a subdirectory folder named with your bundleID inside the application support folder or you can also save it to the preferences folder located inside the library directory:

let preferencesDirectoryURL = FileManager.default.urls(for: .libraryDirectory, in: .userDomainMask).first!.appendingPathComponent("Preferences", isDirectory: true)
let fileURL = preferencesDirectoryURL.appendingPathComponent("fileName.plist")
print(fileURL.path)   // "/var/folders/.../Library/Preferences/fileName.plist

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