iOS 应用程序配置文件
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iOS Application Configuration File
提问by António
In a C#application I always used an app.configfile to save some data for my application to load when needed (e.g Connection String).
在C#应用程序中，我总是使用一个app.config文件来保存一些数据，以便我的应用程序在需要时加载（例如连接字符串）。
What is the best way to save information like this in an iOS application?
在 iOS 应用程序中保存此类信息的最佳方法是什么？
回答by Rafael Steil
You can create a property list file (there is a template for that in XCode, just to to File -> New file and choose there), so you will have something like "settings.plist", or anything like that. You can think of a plist as being a key => value config file, with the difference that you can also hold arrays and dictionaries, besides plain text as value.
您可以创建一个属性列表文件（在 XCode 中有一个模板，只需到 File -> New file 并在那里选择），因此您将拥有类似“settings.plist”之类的内容。您可以将 plist 视为键 => 值配置文件，不同之处在于除了纯文本作为值之外，您还可以保存数组和字典。
Use NSBundle to load the file in your app, like
使用 NSBundle 在您的应用程序中加载文件，例如
NSString *path = [[NSBundle mainBundle] pathForResource:@"settings" ofType:@"plist"];
NSDictionary *settings = [[NSDictionary alloc] initWithContentsOfFile:path];
You can then access your keys as a regular dictionary. Just don't forget to [release] it after ;).
然后，您可以像普通字典一样访问您的密钥。只是不要忘记在 ;) 之后[发布]它。
回答by Simon
For small bits of data like a connection string, I'd use NSUserDefaults.
对于像连接字符串这样的小数据，我会使用NSUserDefaults。
When you want to save your connection string, you'd do this:
当你想保存你的连接字符串时，你可以这样做：
[[NSUserDefaults standardUserDefaults] setObject:myConnectionString
forKey:@"connectionString"];
When you want to load it, you'd do this:
当你想加载它时，你会这样做：
myConnectionString = [[NSUserDefaults standardUserDefaults]
stringForKey:@"connectionString"];
回答by Jeff
If you're just storing a relatively simple set of configuration stuff, you can simply use NSDictionary's serialization methods (I don't know how to link to the methods directory in the class doc):
如果您只是存储一组相对简单的配置内容，则可以简单地使用NSDictionary的序列化方法（我不知道如何链接到类文档中的方法目录）：
NSString *settingsPath = [@"~/pathtoconfig.plist" stringByExpandingTildeInPath];
NSMutableDictionary *settings = [NSMutableDictionary dictionary];
if([[NSFileManager defaultManager] fileExistsAtPath:settingsPath]){
settings = [NSMutableDictionary dictionaryWithContentsOfFile:settingsPath];
}
// writing settings
[settings writeToFile:settingsPath atomically:YES];
Since I don't know how familiar you are with objective-c, I'll also note:
由于我不知道你对objective-c有多熟悉，我还要注意：
- In iOS, the home directory refers to the application's sandboxed directory.
- I recommend reading a little bit up on reference counting. Although objective-c, as of iOS5, now automatically reference countsfor you, there are some edge cases to be aware about (Here's a SO question on ARC)
- 在 iOS 中，主目录是指应用程序的沙盒目录。
- 我建议阅读一些关于引用计数的内容。尽管从 iOS5 开始，objective-c 现在会自动为您计算引用计数，但仍有一些边缘情况需要注意（这是关于 ARC 的一个 SO 问题）
回答by beatsbears
Updated for Swift 3 Xcode 8
为 Swift 3 Xcode 8 更新
Add a new property list to your project named "Sample.plist". Then see the following example.
将一个新的属性列表添加到名为“Sample.plist”的项目中。然后看下面的例子。
let path: String = Bundle.main.path(forResource: "Sample", ofType: "plist")!
let sampleConf: NSDictionary = NSDictionary(contentsOfFile: path)!
print(sampleConf.object(forKey: "test") as! String)
回答by iOSPawan
In iOs every App has own sandbox which will be availble for that app only. So If you want that file to be read only access save it to Application Bundle. else save to Application folder.
在 iOs 中，每个应用程序都有自己的沙箱，仅可用于该应用程序。因此，如果您希望该文件为只读访问权限，请将其保存到应用程序包中。否则保存到应用程序文件夹。
you Can not access Application folder directly So If you want to save your file to that folder you have to do it programmatically.
您无法直接访问 Application 文件夹，因此，如果要将文件保存到该文件夹，则必须以编程方式进行。
回答by King-Wizard
iOS Application Configuration File in Swiftwith iOS 8.3:
带有iOS 8.3 的Swift 中的iOS 应用程序配置文件：
let path: String = NSBundle.mainBundle().pathForResource("Info", ofType: "plist")!
let nsDictionaryInfoPlist: NSDictionary = NSDictionary(contentsOfFile: path)!
// Usage example: Google Maps iOS SDK/API Configuration.
GMSServices.provideAPIKey(nsDictionaryInfoPlist.objectForKey("GoogleMapsiOSAPIKey") as! String)
回答by TheEye
I use property listsfor storing small pieces of data - have a look here on how to use them:
我使用属性列表来存储小块数据 - 请在此处查看如何使用它们：
http://iphoneincubator.com/blog/tag/nspropertylistserialization
http://iphoneincubator.com/blog/tag/nspropertylistserialization
回答by rmeador
I realize I'm late to the party, but after finding this stack overflow I was disheartened at the accepted answer, so I created a podto solve it! This is based on the idea from @RafaelSteil's answer, but it has a simpler interface, caches the loaded config data, and it supports pods providing their own defaults which can be overridden by the main app. I hope it helps someone.
我意识到我迟到了，但是在发现这个堆栈溢出后，我对接受的答案感到沮丧，所以我创建了一个 pod来解决它！这是基于@RafaelSteil's answer的想法，但它有一个更简单的界面，缓存加载的配置数据，并且它支持 pod 提供自己的默认值，可以被主应用程序覆盖。我希望它可以帮助某人。
