如何存储相对静态但可配置的信息 [英] How to store relatively static but configurable information

问题描述

我有一张表（字典的字典）来存储整数到字符串的映射。我有类型和子类型。例如类型1 =>水果和子类型1 =>苹果。

I have a table (dictionary of dictionaries) to store mapping of integers to strings. I have types and sub-types. e.g. type 1=>fruits and sub-type 1=>apple.

映射应该可以在我的设置界面中配置，但对于应用程序的重置，它是静态的。因此，我不想每次查看映射时都从属性列表中读取内容。我只想在程序启动时读一次，而仅在用户更改设置时才写。

The mapping shall be configurable in my setting interface, but for the reset of the application, it's rather static. So I don't want to read from property-list every time I check the mapping. I'd like to only read once when program starts and only write when user changes setting.

该表在运行时应该放在哪里？我想到了两种方法：
（1）是将整个表作为变量放置在应用程序委托中，在这种情况下，每次需要获取字符串时，我都需要两次使用objectForKey。
（2）是用静态变量创建一个类（尚不确定如何做）并使用类方法来获取映射，例如+（NSString）stringForType：子类型：

Where should I keep this table at runtime? I have two approaches in mind: (1) is to put the entire table as a variable in the application delegate, in this case, I need to use objectForKey twice every time I need to get a string. (2) is to create a class with a static variable (not sure how to do it yet) and use class method to get the mapping e.g. +(NSString) stringForType: subType:

您能否评估这两种方法或提出更好的解决方案？非常感谢！

Could you please evaluate these two approaches or suggest better solutions? Thanks a lot!

推荐答案

放在哪里并不重要，只要保留一个副本即可。 ，您应该检查的重要内容是 valueForKeyPath：。如果存储在plist中，并定期保存到plist中，那么持久性将带来很大的好处。您可以使用 [NSUserDefaults standardUserDefaults]; 对象自动获取。

it doesn't really matter where you put it, as long as you keep exactly one copy of it, the important thing that you should check out is valueForKeyPath:. If you store in a plist, and save to the plist regularly you have the great benefit of persistence. You can get that automatically with the [NSUserDefaults standardUserDefaults]; object.

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