拥有Apple开发者账号，如何真机测试演示React Native iOS应用？

Hey there! Since you’ve already nailed building your React Native iOS app and testing it on the simulator, plus you’ve got an Apple Developer account, let’s walk through exactly how to get it running on a physical iOS device for testing and demos:

• Make sure your iOS device runs a version compatible with your React Native setup (usually iOS 11.0 or newer—double-check your RN docs if you’re unsure)
• Plug your device into your Mac using a USB cable. You’ll see a prompt on your device asking to "Trust This Computer"—tap Trust and enter your passcode if needed.
• Grab your device’s UDID: Go to Settings > General > About, tap the Serial Number once to reveal the UDID, then long-press to copy it.

• Log into your Apple Developer account dashboard
• Head to the Certificates, Identifiers & Profiles section
• On the left sidebar, select Devices, then click the + button in the top-right corner
• Give your device a friendly name (like "Jane’s iPhone 15") and paste the UDID you copied earlier. Hit Continue and follow the prompts to finish registering it.

Still in the Certificates, Identifiers & Profiles area:

• Create a Development Certificate:
  • Select Certificates from the left sidebar, click +, then choose iOS App Development
  • Follow the wizard to generate a CSR (Certificate Signing Request) using Keychain Access on your Mac, upload it, then download the certificate file. Double-click it to install it into your Mac’s Keychain.
• Create a Development Provisioning Profile:
  • Select Profiles from the left sidebar, click +, then choose iOS App Development
  • Pick your App ID (if you don’t have one yet, go to Identifiers first to create one—make sure it matches the bundle ID in your React Native project exactly)
  • Select the device you just registered, choose your newly created development certificate, give the profile a name (like "My RN App Dev Profile"), then download it. Double-click to install it into Xcode.

• Open your RN project, navigate to the ios folder, and open the .xcworkspace file (don’t use .xcodeproj—it won’t include CocoaPods dependencies correctly)
• In Xcode’s left sidebar, select your project, then go to the Signing & Capabilities tab:
  • Under Team, select your Apple Developer account
  • Check the box for Automatically manage signing (this lets Xcode handle most of the certificate/profile heavy lifting for you—way easier than manual setup)
  • Double-check that the Bundle Identifier matches the App ID you created in your developer account exactly (even a tiny typo will break things!)
• At the top of Xcode, select your physical device from the device dropdown menu (it should show up once it’s connected and trusted)

• Head back to your terminal, navigate to your RN project root, and run npm install or yarn install to make sure all dependencies are up to date
• You can either run npx react-native run-ios --device in the terminal, or just click the play button (▶️) in Xcode’s top-left corner
• The first run might take a minute as Xcode builds and installs the app. Once it’s done, you’ll see your app on your device’s home screen!
• If you get an "Untrusted Developer" error on your device, go to Settings > General > VPN & Device Management, find your developer account, and tap Trust [Your Account Name]

• If Xcode throws signing errors: Double-check that your bundle ID matches your App ID, your device is registered, and your certificates/profiles are installed correctly. Sometimes restarting Xcode helps too!
• For wireless testing (no USB cable): Make sure your Mac and device are on the same Wi-Fi network, then in Xcode go to Window > Devices and Simulators, select your device, and check "Connect via network"
• If the app crashes right after opening: Use Xcode’s Window > Devices and Simulators to view your device’s logs—they’ll show you exactly what’s causing the crash.

内容的提问来源于stack exchange，提问作者kulls