nsuserdefaults

I have an array of CLLocation data that I would like to archive. Should the NSUserDefaults system be used? Otherwise, how best to archive the CLLocation data? UserDefaults can only store certain types of data, and should be used to store user preference information, not arbitrary application state data. To quote the Apple docs : The NSUserDefaults class provides a programmatic interface for interacting with the defaults system. The defaults system allows an application to customize its behavior to match a user’s preferences. For example, you can allow users to determine what units of

1、UIApplication(应用程序实例) 获取方式：[UIApplication sharedApplication] 详细：http://www.cnblogs.com/hissia/p/5678518.html 2、NSNotificationCenter(消息中心) 获取方式：[NSNotificationCenter defaultCenter] 常用的通知模式 3、NSFileManager(文件管理) 获取方式：[NSFileManager defaultManager] 4、NSUserDefaults(偏好设置) 获取方式：[NSUserDefaults standardUserDefaults] 详细：http://www.cnblogs.com/hissia/p/5642405.html 5、NSURLCache(请求缓存) 获取方式：[NSURLCache sharedURLCache] 6、NSHTTPCookieStorage(应用程序cookies池) 获取方式：[NSHTTPCookieStorage sharedHTTPCookieStorage] 7、NSURLSession(发送请求时候用的) 获取方式：[NSURLSession sharedSession] 8、UIMenuController(弹出的 菜单 可以选择，复制，剪切

I am having a problem in my sprite kit app where my NSUserDefaults variable is not working. In createSceneContents (which I know is being called) if (![defaults objectForKey:@"obj"]) { difficultyLabel.text = @"Difficulty: Easy"; [defaults setObject:@"Easy" forKey:@"obj"]; } else { difficultyLabel.text = [NSString stringWithFormat:@"Difficulty: %@", [defaults objectForKey:@"diff"]]; } and then when you click on the SKLabelNode to change the difficulty and this code is being called if ([label.text isEqualToString:@"Difficulty: Easy"]) { label.text = @"Difficulty: Hard"; [defaults setObject:@

I'm using a tuple to store something like this. var accessLavels: (hasInventoryAccess: Bool, hasPayrolAccess: Bool) accessLavels = (hasInventoryAccess: true, hasPayrolAccess: false) Now I want to save it in NSUserDefaults . NSUserDefaults.standardUserDefaults().setValue(accessLavels, forKey: "AccessLevelKey") NSUserDefaults.standardUserDefaults().synchronize() But I get the following error. Type '(hasInventoryAccess: Bool, hasPayrolAccess: Bool)' does not conform to protocol 'AnyObject' How can I resolve this issue? If its impossible, then any other suggestions to save a tuple is welcome.

Documentation is not clear on how to use NSUbiquitousKeyValueStore with edge cases. If I want to set a value, I understand that I should set a value to both NSUserDefaults and NSUbiquitousKeyValueStore since iCloud could be disabled. However in my tests [NSUbiquitousKeyValueStore defaultStore] return a valid object even if iCloud is disabled (tested on Mac OS). Also, to my understanding is that if iCloud is enabled, NSUbiquitousKeyValueStore 's values are stored to disk (and available offline). What are the reason to use NSUserDefaults if you are sure that you have less than 64KB of data? I am

I have a struct named Jar and I would like to save an array of them to NSUserDefaults. Here is the jar struct code: struct Jar { let name: String let amount: Int init(name: String, amount: Int){ self.name = name self.amount = amount } } I belive that I will need to convert this to an NSObject to be able to save it. (Because you can't save a struct directly to NSUserDefaults). My questions are: How do I convert an array of structs to an NSObject? and How to convert an NSObject back at an array of structs. This solution is inspired by @Duncan C. I wrote it more familiar way as we do in case

Is data persisted in NSUserDefaults between app launches? I want some small data to be persisted even if I quit and relaunch the app. Yes. Data will persist in NSUserDefaults for the entire lifetime of the app. Data will persist. But, NSUserDefaults is used primarily for preferences. Users expect that it is okay to delete the preference file without affecting their documents and created data. If the data is not a preference, you may want to store the data in a file inside ~/Library/Application Support/[your application's name]/ instead. 来源： https://stackoverflow.com/questions/4771496/data

I'm coding an app where a logged in user has got a couple of extra functionalities than a non logged in user. Basically, I have more or less 5 tabs. When I launch the app, the user immediately gets the login page. He can decide to skip it. If he skips it, there'll only be 3 tabs for him. If he logs in successfully, there'll be 5. I already have my login page made. I just don't know how I can store a session if the user is logged in correctly, and only display a certain number of tabs if the user isn't. I come from PHP, I've just started learning Objective-C, so I'm looking for the same thing