分步指南
如何从截图扫描二维码
二维码是可由设备读取的方形图案，可打开 URL、连接 Wi‑Fi、保存联系人或执行其他操作。本指南说明如何无需用第二台手机，即可读取保存图片中的二维码。
可以从截图扫描二维码吗？
截图扫描是从保存的静态图片读取二维码数据，而不是通过实时相机取景读取。功能会因 iOS、Android 版本和图库应用而异。
需要准备什么
如何从截图扫描二维码：分步操作
我们在 2026 年使用 iPhone 的“照片”和实况文本，以及 Android 的 Google 相册和 Google Lens 测试了截图扫描。结果可能因设备和应用版本而不同。
- 1
找到截图或保存的图片
打开“照片”、图库、Google 相册、文件，或保存二维码图片的聊天应用。
- 2
全屏打开图片
尝试检测前，请确保整个二维码都可见。不要裁掉代码周围的白色留白。
- 3
使用内置二维码检测
在 iPhone 上查找检测到的链接横幅、实况文本图标或可操作的二维码区域；在 Android 上轻点 Google Lens 或图片搜索。
- 4
打开前查看目标
继续前请阅读 URL 预览、Wi‑Fi 网络名称或操作类型。
- 5
轻点打开或完成操作
打开链接、加入 Wi‑Fi、保存联系人，或按设备提示完成操作。
截图扫描方式比较
方法说明：我们用聊天应用、电子邮件附件和下载文件中的二维码图片测试了原生工具。
| 方式 | 最适合 | 额外应用 | 保存图片 | 离线扫描 |
|---|---|---|---|---|
| iPhone Photos / Live Text | Screenshots, saved photos, iMessage images | No | Yes | Partial |
| Android Google Photos + Lens | Downloads, WhatsApp images, screenshots | Usually no | Yes | Partial |
| Google Lens app | Cross-platform image scanning | Google app | Yes | Partial |
| Third-party scanner app | Older devices without native detection | Yes | Varies | Varies |
| Live camera scan | Printed codes or another device's display | No | Not applicable | Partial |
如何在 iPhone 上扫描截图
- 1. Open the screenshot in the iPhone Photos app.
- 2. Keep the QR code and its white border fully visible.
- 3. Tap the detected link banner, Live Text icon, or QR area.
- 4. Review the URL preview, then tap to open it.
如何在 Android 上扫描截图
- 1. Open the image in Google Photos or your Gallery app.
- 2. Tap Google Lens or Search image when available.
- 3. Wait for Lens to identify the QR code and show its action.
- 4. Review the destination, then tap to continue.
如何扫描常见来源中的二维码
WhatsApp, iMessage, and SMS
Save the original image to your camera roll or screenshot the chat, then open it in Photos or Gallery. Prefer the full-resolution image over a forwarded thumbnail when you can.
Email and Gmail attachments
Download the image attachment, open it in Photos or Google Photos, and run image detection. For a PDF, screenshot the QR region or export the page as an image if direct detection is unavailable.
Slack, Teams, and work chat apps
Save the shared image to your camera roll first. Opening it with your native photo app gives Live Text or Lens a clearer image than a compressed in-chat preview.
Browser downloads and PDFs
Open a downloaded image full screen. If the QR code is embedded in a PDF or web page, take a clean screenshot of the entire code and scan that saved image.
A QR code on your own screen
You do not need another phone. Screenshot the code, open the saved image in Photos or Gallery, and use image-based detection; live Camera mode is designed for external targets.
如何截取二维码以便稍后扫描
当连接缓慢、需要分享代码，或想保存活动门票和 Wi‑Fi 凭据时，截图很实用。现在保存清晰、未裁切的图片，之后再用照片应用的检测工具读取。
- Include the complete QR code and its quiet zone in the capture.
- Use a native screenshot or high-quality PNG when possible.
- If photographing a screen, reduce glare and moiré patterns first.
- Store important codes in Photos or a dedicated album so they are easy to find.
应使用哪种截图扫描方式？
| 您的情况 | 推荐方式 |
|---|---|
| iPhone with iOS 15 or later | Open Photos and use Live Text or the detected link banner. |
| Android with Google Photos | Open the image and tap Google Lens or Search image. |
| Native detection fails | Try Google Lens, then compare trusted scanner apps. |
| QR is on your own screen | Screenshot it, then scan the saved image. |
| Printed code or packaging | Use a live camera scan and see the device-specific guides. |
| Campaign QR needs testing | Run a screenshot scan test before printing or publishing. |
实时相机扫描与截图扫描
| 因素 | 实时相机扫描 | 截图扫描 |
|---|---|---|
| Speed | Fastest for physical codes | Fastest for digital-only codes |
| Best use case | Posters, packaging, menus | Chat images, tickets, screen shares |
| Second device needed | Sometimes | No |
| Image-quality risk | Lighting and camera blur | Compression and cropping |
| Dynamic QR analytics | Standard redirect flow | Generally the same redirect flow |
从截图扫描二维码的使用场景
Event tickets and boarding passes
Open a QR code sent in a confirmation message without asking the organizer to resend it.
WiFi credentials
Read a WiFi QR code shared as an image and review the network prompt before joining.
Menus and coupons
Open a QR code downloaded from social media or email when the original post is no longer nearby.
Remote presentations
Capture a QR code shown in a screen share, then scan the saved image after the meeting.
PDF manuals
Extract a product registration or warranty QR code from a downloaded PDF page.
Campaign testing
Verify that your own QR code opens the right destination before you print or publish it.
扫描截图时的常见错误
Cropping the quiet zone
Recapture the complete code with its white border visible.
Using a blurry or compressed image
Save the original image or take a fresh native screenshot.
Using Camera on the same screen
Open the saved image and use Live Text or Lens instead.
Opening an unknown link immediately
Review the destination preview and verify the sender first.
Assuming every Android Gallery has Lens
Open the image in Google Photos if your Gallery app lacks image search.
Photographing a bright screen
Reduce glare and moiré, or request the original image file.
截图二维码扫描最佳实践
Keep the full code
Preserve every module and the quiet zone around the QR pattern.
Use clear source files
Prefer PNG, an original download, or a native screenshot over a compressed forward.
Check before opening
Confirm the URL, WiFi network, contact, or other action before tapping.
Keep software current
Update iOS, Android, Google Photos, or Lens for the latest detection support.
Test before publishing
Test both printed and screenshot workflows before a campaign launch.
Use editable destinations
Dynamic QR codes can keep a shared image useful even after a destination changes.
截图扫描会影响二维码分析吗？
动态二维码具有可编辑 URL 和扫描分析的重定向层；静态二维码的目标固定。QR-Build 是生成器，不是扫描应用。
截图二维码的安全提示
- Verify the sender before acting on a QR image received unexpectedly.
- Inspect the displayed URL for misspellings or unfamiliar domains.
- Be extra cautious with login, payment, wallet, or account-recovery prompts.
- Stop and independently visit the official site when a QR destination feels suspicious.
排查截图二维码扫描问题
No detection prompt appears
Open the image in Google Photos, try Google Lens, and update your operating system or photo app.
The code looks damaged
Request the original image or capture a new screenshot with the full code visible.
The wrong destination opens
Do not continue; capture the code again and compare the preview with the expected domain.
A Gallery app has no Lens option
Share or open the image in Google Photos, or use a trusted image-scanning tool.
术语表
Screenshot scan
Reading QR payload from a saved screen capture with image-based detection such as Live Text or Google Lens, distinct from live camera scanning.
Saved image scan
Detecting a QR code inside a photo, downloaded file, or attachment rather than through a camera viewfinder.
Live Text
An iOS feature that recognizes text, links, and actionable content in still images, including some QR codes.
Google Lens
Google's visual search tool, used in Google Photos and the Google app, that can read QR codes in images.
Quiet zone
The clear white border around a QR code that helps scanners separate its pattern from nearby content.
Dynamic QR code
A QR code with an editable redirect destination and scan analytics; its redirect can be changed without re-sharing the image.
用于测试和分享二维码的 QR-Build 功能
如果您创建二维码，截图扫描是对客户实际接收图片的数字渠道进行快速发布前测试。QR-Build 提供静态二维码和具有可编辑目标及扫描分析的动态二维码。
相关操作指南
常见问题
可以从截图扫描二维码吗？
可以。在“照片”或图库中打开截图，使用实况文本或 Google Lens 等内置图片检测功能；不需要第二台设备。
可以在 iPhone 上扫描截图中的二维码吗？
可以。在“照片”中打开图片，使用检测到的链接横幅或实况文本，查看 URL 后轻点打开。请参阅完整 iPhone 指南。
可以在 Android 上扫描截图中的二维码吗？
可以。在 Google 相册或兼容图库中打开图片，然后轻点 Google Lens 或图片搜索。请参阅完整 Android 指南。
创建自己的二维码
创建一个用于分享的二维码，并在发布前从截图测试。动态二维码可提供可编辑目标和扫描分析。
免费创建二维码