面罩和带面容 ID(Face ID)的 iPhone不能很好地搭配使用。尽管您确实可以选择通过 Apple Watch 解锁 iPhone(unlocking the iPhone via Apple Watch)，但它在实践中往往效果不佳，(not to work well in practice)并且如果您没有 watchOS 设备，则需要大量投资。
值得庆幸的是，如果您使用具有最新系统软件的兼容 iPhone，您应该能够在戴上口罩时解锁它，就像您不戴口罩一样。继续阅读以了解如何在戴着口罩的 iPhone 上使用面容 ID在(Face ID)COVID-19大流行中保持安全。
戴口罩的面容 ID 的工作原理
默认情况下，Face ID通过对您的面部进行全面扫描来工作，但在运行 iOS 15.4 及更高版本的兼容 iPhone 中，TrueDepth摄像头系统只需对眼睛区域进行部分扫描即可对您进行身份验证。只要您将 iOS 设备配置为以这种方式解锁，就可以在有或没有面罩的情况下获得无缝的Face ID体验。(Face ID)
将您的 iPhone 设置为使用带面罩的面容 ID(Face ID)，还可以让您验证第三方应用程序和Apple Pay购买。这比 iOS 14.5 的“使用Apple Watch解锁”更上一层楼，后者仅限于锁定屏幕(Lock Screen)。但是，与常规Face ID不同，新功能不适用于太阳镜；不过，用普通眼镜使用它应该没有问题。
支持面容 ID(Face ID)的 iPhone机型(Models)
虽然 iOS 15.4 可用于所有Face ID iPhone（从 iPhone X 开始），但您只能在 iPhone 12 及更高版本上使用带有面罩的Face ID 。在撰写本文时，以下是支持该功能的智能手机型号的完整列表：
- iPhone 12
- iPhone 12 专业版
- iPhone 12 专业版
- iPhone 12 迷你
- iPhone 13
- iPhone 13 专业版
- iPhone 13 专业版
- iPhone 13 迷你
注意(Note)：无论型号如何， iPad Pro均不提供带面罩的面容 ID 。
将 iPhone 更新至 iOS 15.4 或更高版本
在带面罩的 iPhone 上使用面容 ID(Face ID)之前，您必须将 iPhone 更新到 iOS 15.4 或更高版本。如果您还没有：
1. 打开设置(Settings)应用程序并点击常规(General)。
2. 点击软件更新(Software Update)。
3.等到(Wait)您的 iPhone 扫描最新更新。然后，点击下载并安装(Download and Install)。
相关(Related)：无法更新您的 iPhone？了解(Learn)如何解决卡住的 iOS 更新(troubleshoot stuck iOS updates)。
使用口罩设置面容 ID
更新您的 iPhone 后，您将立即可以选择使用面罩功能设置面容 ID 。(Face ID)该过程类似于标准的 3D 面部扫描。如果你跳过它：
1. 打开设置(Settings)。然后，向下滚动并点击面容 ID 和密码(p Face ID and Passcode)。
2. 打开带口罩人脸识别( Face ID with a Mask)旁边的开关。
3. 完成 3D 面部扫描程序。它实际上与标准的Face ID设置相同；在此过程中您不必戴口罩。
如果您戴眼镜，请点击添加眼镜(Add Glasses )选项并戴上眼镜重复新的面容 ID(Face ID)扫描。如果您使用多于一副眼镜，则必须重复使用该选项来添加它们。如上所述，该功能不适用于太阳镜。
戴上口罩解锁手机
戴上口罩时，您可以通过举起 iPhone 来解锁 iPhone，类似于普通的Face ID。您的 iPhone 还会检查您的注意力（这意味着您必须积极注视屏幕）以启动面部识别算法。如果您将面罩拉得更靠近眼睛或戴着墨镜，它不会验证您的身份（带或不带口罩）。
使用口罩禁用面容 ID
正如Apple在(Apple)面容 ID(Face ID)和密码(Passcode)屏幕中提到的那样，“面容 ID(Face ID)在设置为仅用于全脸识别时最准确。” 由于该功能仅对您的面部进行部分扫描，因此最终可能会验证另一个人(end up authenticating another person)——例如，具有相似面部特征的家庭成员。
因此，如果您不经常使用面罩，您可能需要禁用该功能并恢复为标准的全脸扫描。为此，请打开“设置”(Settings)应用程序，转到“面容 ID 和密码(Face ID & Passcode)”，然后关闭“带面罩使用面容 ID( Use Face ID with a Mask) ”旁边的开关。
您仍然可以通过Apple Watch解锁(Apple Watch)
如果您是使用不受支持的 iOS 设备（例如 iPhone 11）的 iPhone 用户，请不要忘记您仍然可以使用Apple Watch解锁它。如果您有 watchOS 设备，请前往“设置”(Settings) > “面容 ID 和密码( Face ID & Passcode)” > “使用 Apple Watch 解锁”以激活该功能。(Unlock with Apple Watch)
即使使用受支持的 iPhone 型号，最好还是设置“使用Apple Watch解锁(Unlock)”以及部分面容 ID(Face ID)扫描。启用这两个功能后，如果您的 iPhone 无法使用面部识别对您进行身份验证，您的 iPhone 将检查您的Apple Watch——例如，在佩戴深色镜片的眼镜时。也就是说，您知道您还可以在 macOS 中添加 Apple Watch 来解锁您的 Mac(add an Apple Watch in macOS to unlock your Mac)吗？
How to Use Face ID on iPhone With a Mask On (No Apple Watch Required)
Face masks and iPhonеs with Face ID don’t go well together. Although you do have the option of unlocking the iPhone via Apple Watch, it tends not to work well in practice and requires a hefty investment if you don’t own a watchOS device.
Thankfully, if you use a compatible iPhone with the latest system software, you should be able to unlock it while wearing a face mask, just like how you do without one. Read on to learn how to stay safe in the COVID-19 pandemic using Face ID on iPhone with a mask on.
How Face ID With a Mask On Works
By default, Face ID works by performing a full scan of your face, but in compatible iPhones running iOS 15.4 and later, the TrueDepth camera system can authenticate you with just a partial scan focusing on the eye area. That allows for a seamless Face ID experience with or without a face mask, so long as you configure your iOS device to unlock that way.
Setting up your iPhone to use Face ID with a mask on also allows you to authenticate third-party apps and Apple Pay purchases. That is a step up from iOS 14.5’s “Unlock with Apple Watch,” which is restricted only to the Lock Screen. However, unlike regular Face ID, the new feature does not work with sunglasses; you should have no trouble using it with ordinary glasses, though.
Supported iPhone Models With Face ID
Although iOS 15.4 is available for all Face ID iPhones (starting from the iPhone X), you can only use Face ID with a face mask on the iPhone 12 and later. At the time of writing, here’s the complete list of smartphone models that support the functionality:
- iPhone 12
- iPhone 12 Pro
- iPhone 12 Pro Max
- iPhone 12 mini
- iPhone 13
- iPhone 13 Pro
- iPhone 13 Pro Max
- iPhone 13 mini
Note: Face ID with a mask is not available for the iPad Pro regardless of the model.
Update iPhone to iOS 15.4 or Later
Before using Face ID on an iPhone with a face mask, you must update your iPhone to iOS 15.4 or later. If you haven’t already:
1. Open the Settings app and tap General.
2. Tap Software Update.
3. Wait until your iPhone scans for the latest updates. Then, tap Download and Install.
Related: Can’t update your iPhone? Learn how to troubleshoot stuck iOS updates.
Set Up Face ID With a Mask
Immediately after updating your iPhone, you will be given the option of setting up the Face ID with a mask feature. The process is similar to a standard 3D facial scan. If you skipped it:
1. Open Settings. Then, scroll down and tap Face ID and Passcode.
2. Turn on the switch next to Face ID with a Mask.
3. Go through the 3D facial scanning procedure. It’s practically the same as the standard Face ID setup; you do not have to wear a mask during the process.
If you wear glasses, tap the Add Glasses option and repeat a new Face ID scan with the glasses on. If you use more than a single pair of glasses, you must repeatedly use the option to add them. As mentioned above, the functionality does not work with sunglasses.
Unlock Your Phone With a Mask On
While wearing your face mask, you can unlock your iPhone by holding it up, similar to regular Face ID. Your iPhone will also check for attention (which means that you must be actively looking at the screen) for the facial recognition algorithm to kick in. It will not authenticate you if you’ve pulled up your mask closer to your eyes or while wearing shades (with or without a mask on).
Disable Face ID With a Mask
As Apple mentions within the Face ID & Passcode screen, “Face ID is most accurate when it’s set up for full-face recognition only.” Since the functionality only partially scans your face, that could end up authenticating another person—e.g., a family member with similar facial features.
So, if you don’t use a face mask regularly, you may want to disable the functionality and revert to standard full-face scanning. To do that, open the Settings app, go to Face ID & Passcode, and turn off the switch next to Use Face ID with a Mask.
You Can Still Unlock via Apple Watch
If you’re an iPhone user with a non-supported iOS device (such as an iPhone 11), don’t forget that you can still unlock it with an Apple Watch. Go to Settings > Face ID & Passcode > Unlock with Apple Watch to activate the feature if you have a watchOS device.
Even with supported iPhone models, it’s still best to set up “Unlock with Apple Watch” alongside partial Face ID scanning. With both features active, your iPhone will check for your Apple Watch if it fails to authenticate you using facial recognition—e.g. while wearing glasses with darker lenses. That said, did you know that you could also add an Apple Watch in macOS to unlock your Mac?
