你可以打印当前所有的NSUserDefaults到日志:

键:

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

键和值:

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

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

MacOS应用 进入:/Users/{User}/Library/Containers/com。{你的公司}。{your app}/Data/Library/Preferences，然后用Xcode打开你的app的pList。

使用下面的代码。

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

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

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;
    ...