iOS Simulator手动修改plist配置后复原问题及检测方案咨询

问题背景 #

我正在搭建用于端到端测试的iOS Simulator自动化启动流程，步骤如下：

• 创建新设备
• 启动设备
• 等待一段时间
• 修改配置

对应的bash脚本：

DEVICE_ID=$(xcrun simctl create "iPhone 14" "iPhone 14" "ios17")
xcrun simctl boot $DEVICE_ID
sleep 60
plutil -replace restrictedBool.allowPasswordAutoFill.value -bool NO ~/Library/Developer/CoreSimulator/Devices/$DEVICE_ID/data/Containers/Shared/SystemGroup/systemgroup.com.apple.configurationprofiles/Library/ConfigurationProfiles/UserSettings.plist
plutil -replace restrictedBool.allowPasswordAutoFill.value -bool NO ~/Library/Developer/CoreSimulator/Devices/$DEVICE_ID/data/Library/UserConfigurationProfiles/EffectiveUserSettings.plist
plutil -replace restrictedBool.allowPasswordAutoFill.value -bool NO ~/Library/Developer/CoreSimulator/Devices/$DEVICE_ID/data/Library/UserConfigurationProfiles/PublicInfo/PublicEffectiveUserSettings.plist

初始修改生效，但配置值会在几秒到几分钟后自动复原为YES，疑似存在竞态条件，偶发出现。

1. 检测设备首次启动完成，确保配置修改后不被复原 #

不要依赖固定时长的sleep，改用动态检测方式确认设备完全启动：

• 检查设备状态：循环执行xcrun simctl list devices $DEVICE_ID，直到输出中设备状态标记为Booted且连续3次检查结果一致
• 验证关键进程：检查SpringBoard进程是否稳定运行，执行：

  until pgrep -f "SpringBoard.*$DEVICE_ID" > /dev/null; do
      sleep 2
  done
  # 额外等待进程稳定
  sleep 5
  

• 监听配置文件稳定性：在修改前，先循环检查目标plist文件的修改时间，直到10秒内文件未更新，再执行修改：

  PLIST_PATH=~/Library/Developer/CoreSimulator/Devices/$DEVICE_ID/data/Containers/Shared/SystemGroup/systemgroup.com.apple.configurationprofiles/Library/ConfigurationProfiles/UserSettings.plist
  LAST_MODIFIED=$(stat -f "%m" "$PLIST_PATH")
  STABLE_COUNT=0
  while [ $STABLE_COUNT -lt 5 ]; do
      CURRENT_MODIFIED=$(stat -f "%m" "$PLIST_PATH")
      if [ $CURRENT_MODIFIED -eq $LAST_MODIFIED ]; then
          STABLE_COUNT=$((STABLE_COUNT+1))
      else
          STABLE_COUNT=0
          LAST_MODIFIED=$CURRENT_MODIFIED
      fi
      sleep 2
  done
  

2. 自动检测配置复原，无需人工值守 #

编写监控脚本，定期检查配置值，若复原则重新修改：

DEVICE_ID="你的设备ID"
TARGET_KEY="restrictedBool.allowPasswordAutoFill.value"

# 检查并修复配置的函数
check_and_fix() {
    PLIST_FILES=(
        "~/Library/Developer/CoreSimulator/Devices/$DEVICE_ID/data/Containers/Shared/SystemGroup/systemgroup.com.apple.configurationprofiles/Library/ConfigurationProfiles/UserSettings.plist"
        "~/Library/Developer/CoreSimulator/Devices/$DEVICE_ID/data/Library/UserConfigurationProfiles/EffectiveUserSettings.plist"
        "~/Library/Developer/CoreSimulator/Devices/$DEVICE_ID/data/Library/UserConfigurationProfiles/PublicInfo/PublicEffectiveUserSettings.plist"
    )
    for plist in "${PLIST_FILES[@]}"; do
        VALUE=$(plutil -extract "$TARGET_KEY" raw "$plist" 2>/dev/null)
        if [ "$VALUE" = "YES" ]; then
            plutil -replace "$TARGET_KEY" -bool NO "$plist"
            echo "$(date +'%Y-%m-%d %H:%M:%S'): 修复了$plist的配置"
        fi
    done
}

# 持续监控，每10秒检查一次
while true; do
    check_and_fix
    sleep 10
done

将脚本保存为monitor_sim_config.sh，后台运行：nohup ./monitor_sim_config.sh &

3. 更优的设备真实启动状态校验方法 #

除基础状态检查外，可结合以下方式：

• 检查系统启动日志：通过Simulator日志确认启动完成：

  until xcrun simctl spawn $DEVICE_ID log show --predicate 'eventMessage contains "Boot complete"' --last 1m | grep -q "Boot complete"; do
      sleep 5
  done
  

• 验证文件系统可写性：尝试在设备数据目录创建临时文件，确认系统初始化完成：

  TEST_FILE=~/Library/Developer/CoreSimulator/Devices/$DEVICE_ID/data/tmp/test_boot_complete
  until touch "$TEST_FILE" && [ -f "$TEST_FILE" ]; do
      sleep 2
      rm -f "$TEST_FILE"
  done
  rm -f "$TEST_FILE"
  

• 检查Simulator UI状态：用AppleScript判断窗口是否正常加载（仅适用于有UI的环境）：

  osascript -e '
      tell application "Simulator"
          repeat until window 1 exists
              delay 2
          end repeat
      end tell
  '
  

内容的提问来源于stack exchange，提问作者Nicholas Fitton