使用下面的代码。

NSLog(@"NSUserDefault: %@", [[NSUserDefaults standardUserDefaults] dictionaryRepresentation]);

你可以在模拟器中找到你的应用的pList文件，如果你去:

/users/你的用户名/库/应用程序支持/iPhone模拟器/<Sim版本>/应用程序

这个目录有很多以GUID命名的目录。如果你正在开发一些应用程序，就会有一些这样的应用程序。所以你需要找到你的应用二进制:

find . -name foo.app
./1BAB4C83-8E7E-4671-AC36-6043F8A9BFA7/foo.app

然后进入GUID目录下的Library/Preferences目录。所以:

cd 1BAB4C83-8E7E-4671-AC35-6043F8A9BFA7/Library/Preferences

你应该会找到这样一个文件:

<Bundle Identifier>.foo.pList

在pList编辑器中打开它，并浏览您想要的持久值。

在阅读了这个问题的公认答案后，我把这个简单的脚本放在一起，打开iOS模拟器用来存储NSUserDefaults首选项的plist文件，虽然它假设了某种设置(非常适合我的设置)，但它可以作为其他人的起点。

$ cat open-prefs-plist.sh
#!/bin/sh

# The project name based on the workspace path, e.g. "MyProject" from "./MyProject.xcworkspace"
WORKSPACE_NAME=$(echo `find . -name *.xcworkspace -type d -exec basename {} \;` | cut -d'.' -f1)
SIMULATOR_PATH="$HOME/Library/Application Support/iPhone Simulator"
# The App's bundle ID taken from its info plist, e.g "com.myproject" from "./MyProject/MyProject-Info.plist"
BUNDLE_ID=`/usr/libexec/PlistBuddy -c Print:CFBundleIdentifier $WORKSPACE_NAME/$WORKSPACE_NAME"-Info.plist"`
# Open all plist files in the simulator path that match the app's bundle ID 
# normally one per iOS version
find "$SIMULATOR_PATH" -name $BUNDLE_ID".plist" -type f -print0 \
    | while IFS= read -r -d '' PLIST; do
    echo $PLIST
    open "$PLIST"
done

例放置:

$ ls -1
MyProject
MyProject Tests
MyProject.xcodeproj
MyProject.xcworkspace
Podfile
open-prefs-plist.sh

我在桌面上保留了模拟器文件夹的快捷方式，在那里保存应用程序，即:

/Users/gary/Library/Application Support/iPhone Simulator/User/Applications

按最近的日期排序，然后进入最近的应用程序文件夹库/首选项，并在plist编辑器中查看文件。

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)

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;
    ...