面容 ID(Face ID)是解锁 iPhone、授权应用购买和登录第三方应用的最简单方法。为您的面孔注册Face ID是一个简单的过程。但是，您可能会在此过程中遇到一些问题。
“ Face ID不可用”是许多 iPhone 用户在设置Face ID时遇到的常见错误。本教程涵盖了针对iPhone 上的Face ID 问题的潜在故障排除修复。
注意：(Note:)只有屏幕顶部有矩形槽口的 iPhone 机型支持面容 ID（从(Face ID—from)iPhone X 向上）。此Apple 支持文档(Apple Support document)包含支持面部识别身份验证的 iPhone 和 iPad 的完整列表。
1.正确设置人脸ID
设置面容 ID(Face ID)时，请确保将您的面部正确放置在相机框架中。之后(Afterward)，将您的头部绕圈移动，并确保Face ID设置代理捕捉到您脸部的所有角度。
您还需要扫描您的面部两次，因此请确保完成两次面部扫描。否则，iOS 可能无法设置Face ID。最后，如果使用 iPhone，请将其竖直放置；横向扫描可能会失败。
注意：(Note:)如果使用 iPad，您可以在任何方向（纵向或横向）设置和使用面容 ID 。(Face ID)
作为复习，让我们来看看在 iPhone 上正确设置Face ID的过程。(Face ID)
- 前往 iPhone 上的面容 ID(Face ID)菜单（设置(Settings)>面容 ID 和密码(Face ID & Passcode)）并输入 iPhone 的密码。
- 点击设置面容 ID(Set Up Face ID)。
- 仔细阅读说明以了解更多详细信息，然后点击开始(Get Started)继续。
- 将您的 iPhone 竖直竖直放置，并将您的脸放在框架内。以圆周运动移动头部，直到绿色进度条完成圆圈。
- 完成第一次面容 ID(Face ID)扫描后，再次将您的脸放在框架中，然后完成第二次人脸扫描。
- 当您的手机显示“ Face ID未设置”消息时，点击完成。(Done)锁定您的 iPhone 并检查面容 ID(Face ID)是否有效。
虽然您可以将面容 ID(Face ID)与太阳镜、口罩、帽子、围巾等搭配使用，但它们可能会破坏设置过程。如果问题仍然存在，请取下您脸上的所有配件并重试扫描。
2.将你的 iPhone靠近(Closer)你的脸
您的 iPhone 需要与您的脸部保持一定距离（或更近）才能设置和使用面容 ID(Face ID)。Apple建议 25-50 厘米的接近距离。
如果您的 iPhone 在设置Face ID时无法扫描您的脸部，请将您的脸部靠近您的 iPhone，然后重试。同样(Again)，请记住将您的脸定位在相机框架内并以圆圈移动您的头部。
3. 清洁 iPhone 的原深感摄像头(TrueDepth Camera)
iPhone 上的原深感摄像头系统是(TrueDepth)Face ID的核心和灵魂。在设置Face ID时，TrueDepth摄像头会创建您脸部的深度图和红外图像。iPhone 显示屏顶部的凹槽装有原深感(TrueDepth)摄像头系统。
如果您无法设置面容 ID(Face ID)，请检查原深感(TrueDepth)摄像头是否没有覆盖。用干净、柔软的干布擦拭 iPhone 的凹槽。这将清除堵塞原深感(TrueDepth)摄像头的污垢、油污和其他颗粒。如果手机壳或屏幕保护膜盖住了 iPhone 的凹槽，请将其取下并重试面容 ID(Face ID)扫描。
4.使用辅助功能(Accessibility)选项设置面容 ID(Face ID)
(Face ID)如果您有面部或视力障碍，Face ID注册也可能会失败。在这种情况下，请使用“辅助功能选项(Accessibility Options.)”设置 iPhone 的面容 ID 。(Face ID)” 该功能可让您快速设置面容 ID(Face ID)，而无需扫描整个面部。TrueDepth摄像(TrueDepth)头会捕捉您脸部的几个角度，并使用部分扫描设置Face ID 。
以下是在“辅助功能选项”模式下设置面容 ID的方法：(Face ID)
- 前往“设置”(Settings) > “面容 ID(Face ID)和密码(Passcode)”，输入 iPhone 的密码，然后轻点“设置面容 ID”(Set Up Face ID)。按照说明进行操作，并在出现提示时扫描您的面部。
- 在相机框架屏幕上点击辅助功能选项。(Accessibility Options )
- 接下来，点击Use Partial Circle并在下一个屏幕上点击Done以完成设置。(Done)
5. 重启或强制重启你的(Force-Restart Your)iPhone
重新启动 iPhone 可以轻松解决影响Face ID的临时软件故障。关闭(Power)您的 iPhone，重新打开它，然后再次尝试设置面容 ID(Face ID)。
按住 iPhone 的侧边按钮(Side button)和任一音量(Volume)按钮。将滑动关闭电源(slide to power off)滑块向右移动以关闭您的 iPhone。
或者，打开设置(Settings)应用程序，选择常规(General)，点击关机(Shut Down)，然后向右移动滑块。
等待(Wait)大约 10 秒钟，让您的 iPhone 完全关闭。然后(Afterward)，按住 iPhone 的侧边按钮(Side button)，直到Apple标志出现在屏幕上。
强制重启 iPhone(Force Restart iPhone)
如果您的 iPhone 死机并且无法关机，请强制重启它。按下(Press)并释放提高音量(Volume Up)按钮，按下并释放降低音量(Volume Down)按钮，然后按住侧边按钮(Side button)，直到屏幕上出现Apple标志。(Apple)
尝试(Try)从头开始设置您的 Face ID，并检查重新启动 iPhone 是否解决了问题。
6.重置你的 iPhone 的设置
刷新您的 iOS 设置还可以解决阻止您的 iPhone 设置面容 ID(Face ID)的问题。请注意，重置 iPhone 的设置将删除所有与位置、隐私和网络相关的设置。该操作还将删除与您的设备关联的所有Apple Pay卡。但是，您的数据和帐户不会被删除。
请按照以下步骤重置 iPhone 的设置：
- 前往“设置”(Settings) > “通用(General)” > “传输或重置 iPhone(Transfer or Reset iPhone) ” ，然后轻点“重置”(Reset)
- 选择重置所有设置(Reset All Settings)并输入您的 iPhone 密码。在确认提示中再次选择重置所有设置。(Reset All Settings)
如果您的 iPhone 运行 iOS 14 或更低版本，请前往“设置”(Settings) > “通用(General)” > “重置(Reset)” > “重置所有设置”(Reset All Settings)以重置其设置。
等待(Wait)您的 iPhone 重新开机并设置面容 ID(Face ID)，然后再执行任何其他操作。
7. 更新你的 iPhone
与软件相关的问题（错误或过时的操作系统）也可能导致Face ID出现故障。如果您仍然无法设置面容 ID(Face ID)，请更新您的 iPhone 并重试。
将您的 iPhone 连接到 Wi-Fi 网络，然后前往“设置”(Settings) > “通用(General)” > “软件更新”。(Software Update. )点击下载并安装(Download and Install)以将您的 iPhone 更新到最新版本的 iOS。
获得专业帮助
如果您仍然无法设置Face ID，则您的 iPhone 的原深感(TrueDepth)摄像头可能有故障。前往(Head)附近的Apple Store 零售店(Apple Retail Store)或Apple 服务提供商(Apple Service Provider)检查硬件相关问题。如果您附近没有授权的Apple服务中心，请联系 Apple 支持。(Contact Apple Support)
Can’t Set Up Face ID on iPhone? 7 Ways to Fix
Face ID is the easiest way to unlock your iPhone, authorize app purchases, and sign in to third-party apps. Enrolling your face for Face ID is a straightforward process. However, you might run into some issues during the process.
“Face ID Is Not Available” is a common error many iPhone users encounter when setting up Face ID. This tutorial covers potential troubleshooting fixes for Face ID problems on your iPhone.
Note: Only iPhone models with a rectangular notch at the top of the screen support Face ID—from iPhone X upward. This Apple Support document has a comprehensive list of iPhones and iPad that support facial recognition authentication.
1. Set up Face ID Correctly
When you set up Face ID, make sure you position your face correctly in the camera frame. Afterward, move your head in circles and ensure the Face ID setup agent captures all angles of your face.
You also need to scan your face twice, so ensure you complete both face scans. Otherwise, iOS may fail to set up Face ID. Finally, if using an iPhone, position it upright in portrait orientation; doing the scan in landscape might fail.
Note: If using an iPad, you can set up and use Face ID in any orientation—portrait or landscape.
As a refresher, let’s walk through the process of setting up Face ID the right way on an iPhone.
- Head to the Face ID menu on your iPhone (Settings > Face ID & Passcode) and enter your iPhone’s passcode.
- Tap Set Up Face ID.
- Go through the instructions for more details and tap Get Started to proceed.
- Hold your iPhone upright in portrait orientation and position your face within the frame. Move your head in circular motions until the green progress bar completes the circle.
- When the first Face ID scan is complete, position your face in the frame again and complete the second face scan.
- Tap Done when your phone displays a “Face ID is not set up” message. Lock your iPhone and check if Face ID works.
Although you can use Face ID with sunglasses, masks, hats, scarves, etc., they may disrupt the setup process. If the problem continues, remove any accessories on your face and retry the scan.
2. Move Your iPhone Closer to Your Face
Your iPhone needs to be at arm’s length (or closer) from your face to set up and use Face ID. Apple recommends a 25-50cm proximity distance.
If your iPhone won’t scan your face when setting up Face ID, move your face closer to your iPhone and try again. Again, remember to position your face within the camera frame and move your head in circles.
3. Clean Your iPhone’s TrueDepth Camera
The TrueDepth camera system on your iPhone is the heart and soul of Face ID. It’s the TrueDepth camera that creates a depth map and infrared image of your face when setting up Face ID. The notch at the top of your iPhone’s display houses the TrueDepth camera system.
If you can’t set up Face ID, check that nothing is covering the TrueDepth camera. Wipe your iPhone’s notch with a clean, soft, dry cloth. That will remove dirt, oil, and other particles blocking the TrueDepth camera. If a phone case or screen protector covers your iPhone’s notch, remove it and retry the Face ID scan.
4. Set up Face ID with Accessibility Options
Face ID enrollment may also fail if you have a facial or visual impairment. In that case, set up your iPhone’s Face ID using ”Accessibility Options.” The feature lets you quickly set up Face ID without scanning your entire face. The TrueDepth camera captures a few angles of your face and sets up Face ID using the partial scan.
Here’s how to set up Face ID in “Accessibility Options” mode:
- Go to Settings > Face ID & Passcode, type your iPhone’s passcode, and tap Set Up Face ID. Follow the instructions and scan your face when prompted.
- Tap Accessibility Options on the camera frame screen.
- Next, tap Use Partial Circle and tap Done on the next screen to complete the setup.
5. Reboot or Force-Restart Your iPhone
Restarting your iPhone is an easy fix for temporary software glitches affecting Face ID. Power off your iPhone, turn it back on and try setting up Face ID again.
Press and hold your iPhone’s Side button and either of the Volume buttons. Move the slide to power off slider to the right to shut down your iPhone.
Alternatively, open the Settings app, select General, tap Shut Down, and move the slider to the right.
Wait for about 10 seconds for your iPhone to shut down completely. Afterward, press and hold your iPhone’s Side button until the Apple logo shows up on the screen.
Force Restart iPhone
If your iPhone is freezing and won’t go off, force-restart it instead. Press and release the Volume Up button, press and release the Volume Down button, then press and hold the Side button until the Apple logo appears on the screen.
Try and set up your Face ID from scratch and check if restarting your iPhone fixed the problem.
6. Reset Your iPhone’s Settings
Refreshing your iOS settings can also fix problems preventing your iPhone from setting up Face ID. Note that resetting your iPhone’s settings will remove all location, privacy, and network-related settings. The operation will also remove all Apple Pay cards linked to your device. However, your data and accounts aren’t deleted.
Follow the steps to reset your iPhone’s settings:
- Go to Settings > General > Transfer or Reset iPhone and tap Reset
- Select Reset All Settings and enter your iPhone’s password. Select Reset All Settings again on the confirmation prompt.
If your iPhone runs iOS 14 or older, go to Settings > General > Reset > Reset All Settings to reset its settings.
Wait for your iPhone to come back on and set up Face ID before doing anything else.
7. Update Your iPhone
Software-related issues (buggy or outdated operating system) may also cause Face ID to malfunction. If you still can’t set up Face ID, update your iPhone and try again.
Connect your iPhone to a Wi-Fi network and go to Settings > General > Software Update. Tap Download and Install to update your iPhone to the latest version of iOS.
Get Professional Help
If you still can’t set up Face ID, your iPhone’s TrueDepth camera is likely faulty. Head to a nearby Apple Retail Store or Apple Service Provider to check for hardware-related problems. Contact Apple Support if there’s no authorized Apple service center near you.
