您可以检查数组中由返回的每个键的值

[[[NSUserDefaults standardUserDefaults] dictionaryRepresentation] allKeys]

对于OS X应用程序，使用默认命令行实用程序更简单，而不是寻找应用程序的默认plist文件。

NAME defaults -- access the Mac OS X user defaults system SYNOPSIS defaults [-currentHost | -host hostname] read [domain [key]] defaults [-currentHost | -host hostname] read-type domain key defaults [-currentHost | -host hostname] write domain { 'plist' | key 'value' } defaults [-currentHost | -host hostname] rename domain old_key new_key defaults [-currentHost | -host hostname] delete [domain [key]] defaults [-currentHost | -host hostname] { domains | find word | help } DESCRIPTION defaults allows users to read, write, and delete Mac OS X user defaults from a command-line shell. Mac OS X applications and other programs use the defaults system to record user preferences and other information that must be maintained when the applications aren't running (such as default font for new documents, or the position of an Info panel). Much of this information is accessible through an appli- cation's Preferences panel, but some of it isn't, such as the position of the Info panel. You can access this information with defaults

例子:

$ defaults read com.apple.Safari
{
    AutoplayPolicyWhitelistConfigurationUpdateDate = "2018-08-24 17:33:48 +0000";
    AutoplayQuirksWhitelistConfigurationUpdateDate = "2018-08-24 17:33:48 +0000";
    DefaultBrowserPromptingState2 = 4;
    ...

寻找名为simholds2的Mac应用程序。它位于菜单栏中，列出你使用过的所有模拟器，然后显示每个应用程序。选择一个，你会得到一个新的Finder窗口，已经打开到应用程序的目录。这使得它超级容易找到你的应用程序和所有的目录。这是一个巨大的时间节省(我愿意捐赠给作者)。

在Swift 2.2中

let path = NSSearchPathForDirectoriesInDomains(.LibraryDirectory, .UserDomainMask, true)
let folder = path[0]
NSLog("Your NSUserDefaults are stored in this folder: \(folder)/Preferences")

将打印出NSUserDefaults在Xcode调试控制台的plist文件夹位置。复制路径字符串。打开Finder，选择Go菜单项中的“转到文件夹”，粘贴路径字符串。双击plist文件。你会在Xcode编辑器中看到内容。

只能在模拟器中工作

谢谢@Niels Castle

在Swift 4.0中

//func dictionaryRepresentation() -> [String : AnyObject]

因为NSUserDefaults.standardUserDefaults()返回[String: AnyObject]

我们将它转换到NSDictionary中。然后用括号'()'把它括起来将允许我们调用。allkeys或。allvalues就像你在任何NSDictionary上一样

 print((UserDefaults.standard.dictionaryRepresentation() as NSDictionary).allKeys)

您可以使用它来获得用户首选项、缓存和许多其他数据的完整路径

print (NSSearchPathForDirectoriesInDomains(。文件目录。