尽管主要依靠Face ID或Touch ID，但 iPhone 上的系统软件偶尔会请求 4-6 位设备密码进行身份验证。这有助于提高安全性。但是，如果您忘记了 iPhone 密码，您很快就会将自己锁定在智能手机之外。
发生这种情况时，更改 iPhone 密码的唯一方法是将设备重置为出厂设置。下面，您将了解多种方法来执行此操作，并希望您能够在此过程中恢复数据。
恢复出厂(Factory Reset)设置iPhone 的方法？
如果您忘记了 iPhone 密码，可以使用三种不同的方法将 iPhone 恢复为出厂设置。由于该程序会删除您设备上的所有个人数据，因此请仔细检查每个数据并选择适合您的选项。
方法(Method)#1：使用 Mac或 PC正常还原(Restore Normally Using Mac)
您之前是否曾将您的 iPhone 备份或同步到特定的Mac或 PC？如果是这样，您可以将其重新连接到同一台计算机，并在 iTunes 或 Finder 中创建新的备份，(create a fresh backup to iTunes or Finder)而无需输入设备密码。这使您可以稍后取回数据。
如果您过去禁用了 iPhone 的“查找我的 iPhone”功能(disabled your iPhone’s Find My iPhone functionality)，您也可以正常使用 iTunes/Finder 将设备重置为出厂设置。但是，情况不太可能是这样，这意味着您将不得不求助于使用Recovery Mode。
注意：(Note:)如果您的计算机提示您提供访问 iPhone 上内容的权限，或者如果它要求您禁用“查找我的(Find My)iPhone”，您必须立即转到下一个方法。
1. 将您的 iPhone 连接到您的Mac或 PC。然后，打开 iTunes 或Finder并选择 iOS 设备。
2. 选择将iPhone 上的所有数据备份到此 Mac(Back up all of the data on your iPhone to this Mac)选项，然后选择立即(Back Up Now)备份以创建新的本地备份。如果您希望它包含敏感信息，例如您的健康数据、保存的密码和 Wi-Fi 设置，您可以选择创建加密备份。
3. 完成备份创建后，选择恢复 iPhone(Restore iPhone )选项。
4. 选择恢复(Restore )选项以确认您要将设备重置为出厂默认设置。
5. 按照其余说明将 iPhone 重置为出厂设置。
方法(Method)#2：使用恢复模式恢复(Recovery Mode)
如果您从未将 iPhone 连接到Mac或 PC，或者设备已使用“查找我的(Find My)iPhone”进行保护，则必须使用恢复模式(Recovery Mode)将设备恢复出厂设置。如果您忘记了 iPhone 的密码，这也会有所帮助。
1. 将您的 iPhone 连接到您的Mac或 PC。如果它是您用来定期备份或同步 iOS 设备的计算机，您应该能够在继续之前创建一个全新的备份。
2. 进入恢复模式(Recovery Mode)。这包括按住 iPhone 上的Side、Home或 Volume Up/Down 按钮。查看有关强制重启和进入恢复模式(force-restarting and entering Recovery Mode )的指南，了解特定于设备的说明。
3. 选择恢复 iPhone(Restore iPhone)。
4. 选择恢复和更新(Restore and Update)。
在重置设备之前，iTunes/Finder 应该开始自动下载最新版本的 iPhone 系统软件。如果您的 iPhone 在此期间自动重启，您必须重新进入恢复模式(Recovery Mode)。
5. 按照屏幕上的说明将您的 iPhone 重置为出厂默认设置。
方法#3：使用 iCloud.com 恢复
iCloud.com 上的“查找(Find)iPhone”网络应用程序让您可以选择擦除 iPhone 上的数据并将其恢复为出厂设置。如果您手头没有计算机，这是您可以使用的另一种方法。
但是，只有在您的设备上启用了“查找我的(Find My)iPhone”（很可能是这种情况）时，您才能使用此方法。
1.使用任何网络浏览器登录iCloud.com并选择(iCloud.com)Find My。
2. 选择你的 iPhone。
3. 选择抹掉 iPhone(Erase iPhone)。
4. 选择继续(Continue)。
5. 按照其余说明将设备恢复出厂设置。
出厂重置完成(Reset Complete)：您接下来必须做什么
将 iPhone 恢复出厂设置后，设备应该会自动启动到设置助理(Setup Assistant)。通过它，您可以在到达“创建密码(Create a Passcode)”屏幕后更改您的设备密码。
默认情况下，设置助手(Setup Assistant)会提示您设置 6 位密码。为了使事情变得更容易，请点击密码选项(Passcode Options)并将其更改为 4 位数密码。
如果您有 iTunes/Finder 或 iCloud 备份，您可以选择在应用程序和数据(Apps & Data)屏幕上恢复它。根据需要在从 iCloud 备份(Restore from iCloud Backup)恢复或从 Mac 或 PC 恢复(Restore from Mac or PC)选项之间进行选择。
然后，您必须登录 iPhone。如果在重置过程之前您的设备上的“查找我的(Find My)iPhone”处于活动状态，则您必须使用上次登录设备时使用的同一Apple ID 。
密码(Passcode)已更改：不要再次(Again)忘记(Forget)它
由于您不会过多地使用 iPhone 密码，因此很容易忘记。设置一个你能记住的重点——不要让别人更容易猜到——这样你就不会重复遇到同样的问题。最好定期备份到Mac/PC或 iCloud，以防您再次忘记。
How to Change iPhone Passcode When Forgotten
Dеspіte relying mainly on Face ID or Touch ID, the system software on your iPhone сan occasionallу request thе 4-6 digit device passcode for authentication. That helps improve security. But if you’ve forgottеn your iPhone passcodе, you’ll quickly end up locking yourself out of the smartphone.
When that happens, the only way to change the iPhone passcode is to reset the device to factory settings. Below, you’ll learn of multiple ways to go about doing that and—hopefully—get your data back in the process.
Methods to Factory Reset Your iPhone?
If you’ve forgotten your iPhone passcode, you can make use of three different methods to restore your iPhone to factory settings. Since the procedure erases all personal data on your device, go through each of them carefully and pick the option that suits you.
Method #1: Restore Normally Using Mac or PC
Have you previously backed up or synced your iPhone to a particular Mac or PC? If so, you can reconnect it to the same computer and create a fresh backup to iTunes or Finder without entering the device passcode. That allows you to get your data back later.
If you’ve disabled your iPhone’s Find My iPhone functionality in the past, you can also reset the device to factory settings using iTunes/Finder normally. However, that is unlikely to be the case, which means that you’ll have to resort to utilizing Recovery Mode.
Note: If your computer prompts you to provide permission to access the contents on the iPhone, or if it asks you to disable Find My iPhone, you must move onto the next method immediately.
1. Connect your iPhone to your Mac or PC. Then, open iTunes or Finder and select the iOS device.
2. Pick the Back up all of the data on your iPhone to this Mac option and select Back Up Now to create a fresh local backup. You can opt to create an encrypted backup if you want it to include sensitive information such as your health data, saved passwords, and Wi-Fi settings.
3. Once you’ve finished creating the backup, select the Restore iPhone option.
4. Select the Restore option to confirm that you want to reset the device to factory defaults.
5. Follow the remaining instructions to reset your iPhone to factory settings.
Method #2: Restore Using Recovery Mode
If you’ve never connected your iPhone to a Mac or PC, or if the device is secured with Find My iPhone, you must use Recovery Mode to factory reset your device. This will also help if you’ve forgotten your iPhone’s passcode.
1. Connect your iPhone to your Mac or PC. If it’s a computer that you use to back up or sync your iOS device regularly, you should be able to create a fresh backup before proceeding.
2. Enter Recovery Mode. That involves pressing and holding the Side, Home, or Volume Up/Down buttons on the iPhone. Check out this guide about force-restarting and entering Recovery Mode for device-specific instructions.
3. Select Restore iPhone.
4. Select Restore and Update.
iTunes/Finder should begin to automatically download the latest version of the iPhone’s system software before resetting the device. If your iPhone reboots automatically in the meantime, you must re-enter Recovery Mode.
5. Follow the on-screen instructions to reset your iPhone to factory defaults.
Method #3: Restore Using iCloud.com
The Find iPhone web app at iCloud.com gives you the option to erase the data on your iPhone and revert it to factory settings. It’s an alternative method that you can use if you don’t have a computer at hand.
However, you can only use this method if Find My iPhone is active on your device (which is likely the case).
1. Sign in to iCloud.com using any web browser and select Find My.
2. Pick your iPhone.
3. Select Erase iPhone.
4. Select Continue.
5. Follow the rest of the instructions to factory reset the device.
Factory Reset Complete: What You Must Do Next
After you’ve factory reset your iPhone, the device should boot into the Setup Assistant automatically. Work your way through it, and you can change your device passcode once you arrive at the Create a Passcode screen.
By default, the Setup Assistant prompts you to set up a 6-digit passcode. To make things easier, tap Passcode Options and change that to a 4-digit passcode instead.
If you have an iTunes/Finder or an iCloud backup, you can choose to restore it at the Apps & Data screen. Pick between the Restore from iCloud Backup or Restore from Mac or PC options as needed.
You must then sign into the iPhone. If Find My iPhone was active on your device before the reset procedure, you must use the same Apple ID that you used to sign into the device the last time.
Passcode Changed: Don’t Forget It Again
Since you don’t use the iPhone passcode too much, it’s quite easy to forget. Make it a point to set one that you can remember—without making it easier for others to guess—so that you don’t run into the same issue repeatedly. It’s also best to perform regular backups to a Mac/PC or iCloud, just in case you do forget again.
