将数据本地存储在iphone上 [英] storing data locally on the iphone

问题描述

我正在构建一个应用程序，我想在设备上本地存储用户信息，而不使用任何服务器数据库 - 但一切在设备端。我想存储特定的用户位置并在表视图中显示它，所以即使用户以后启动应用程序 - 我可以拉历史记录和进给历史表与过去的位置。基本上来自本地数据库的读/写能力。

I am building an app where I'd like to store user information locally on the device, without using any server database - but everything on the device side. I am looking to store specific user locations and show it in a table view, and so even when the user launches the app later - I can pull the history and feed the history table with the past locations. Basically a read/write capability from a local database.

现在，我知道以前有很多问题，但是我找不到一个在没有外部数据库的情况下本地保存数据的问题。我不知道，例如，使用Core Data是在这里做正确和最简单的事情。

Now, I know that there were many questions like that before but I could not find one that addresses saving data locally without an external data base. I am not sure, for example, that using Core Data is the correct and simplest thing to do here.

不喜欢任何建议。

推荐答案

对于简单数据，您应该使用NSUserDefaults。 CoreData非常酷，但主要是存储DB结构，并引入复杂性（但我喜欢它:)）。如果你只需要存储String，Array等（基本上是prefs），你可以使用NSUserDefaults：

For simple data you should use NSUserDefaults. CoreData is very cool but mainly to store DB structures, and introduces complexity (but i love it:)). If you just need to store String, Array and so on (basically prefs), you can go with NSUserDefaults:

例如：

NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];  //load NSUserDefaults
NSArray *fakeFavs = [[ NSArray alloc] initWithObjects:@"2",@"4", @"100", nil];  //declare array to be stored in NSUserDefaults
[prefs setObject:fakeFavs forKey:@"favourites"];  //set the prev Array for key value "favourites"

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