如何持久化NSMutableArray [英] How to persist a NSMutableArray
问题描述
I'm absolutely new to iOS Dev. I started out with the really helpful tutorial on Apple dev website
因此，我按照说明制作了一个简单的待办事项列表应用程序.
So i made the simple To-Do List application, as per instructions.
应用程序:这是一个简单的待办事项列表.它具有一个带有单个文本字段的视图，该视图接受一个输入，然后将该输入追加到表列表视图中.表列表视图是我的待办事项列表"，它是由NSMutableArray生成的.
The App: It's a simple to-do list. It has a view, with a single text-field, which takes in an input, which then appends that input to the table-list view. the table list view is my "TO-Do List" which is generated from a NSMutableArray.
问题:每当我退出并重新启动该应用程序时，我的列表就会消失.
The Problem: Whenever i quit and relaunch the application, my List disappears.
问题:我需要一种方法来保存存储列表的NSMutableArray *ToDoList.
The Question: I need a way to persist the NSMutableArray *ToDoList which stores my list.
那么可以保留列表吗?还是我必须使用某种数据存储? 在询问并阅读有关将列表存储在"NSUserDefaults"中的内容之前，我做了一些研究-但问题是NsUserDefaults仅返回 im-mutable对象
So is it possible to persist the list? or will i have to make use of some kind of datastore? I did a little research before asking and read something about storing the list in 'NSUserDefaults' - but the problem being, NsUserDefaults, only returns an im-mutable Object
结论:
-
我们可以保留NsMutable列表吗?如果是，怎么办?
Can we persist the NsMutable List? If yes how?
是否需要使用NSUserDefaults?为什么?
Is NSUserDefaults necessary to use? Why?
如果(2)是，那么如何使返回的NsUserDefaults不可变对象可变?
If (2) is yes, then how do i make the returned immutable object of NsUserDefaults mutable?
再次，我应该告诉您，我掌握的iOS开发人员唯一的经验教训来自于本教程.因此，如果您将其分解为最简单的形式，我会喜欢的.
Yet again i should tell you, that the only hands on iOS dev i have is from the tutorial. So i would love it if you break it down to the simplest form.
谢谢.
推荐答案
1)如果只想保存NSMutableArray，则可以，可以使用NSUserDefaults.
1) If you just want to save an NSMutableArray, then yes, you can use NSUserDefaults.
2)如果您不想处理Core Data并设置适当的数据结构，那么这似乎是唯一的选择.
2) If you don't want to deal with Core Data and set up a proper data structure, then it seems like that's the only option.
3)从NSArray *array中获取NSMutableArray时，只需使用[array mutableCopy].
3) When you get an NSMutableArray from an NSArray *array, just use [array mutableCopy].
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