Xcode运行React Native至iPhone时签名失败问题求助

Hey there, let's break down how to fix these signing errors you're running into—they're super common when getting started with React Native on iOS without a paid Apple Developer account. Here's a step-by-step guide:

1. Clean Up Invalid Certificates with Missing Private Keys #

First, those "Missing Private Key" certificates are leftover or unlinked from your Apple ID, so we need to clear them out:

• Open Xcode → Go to Preferences > Accounts
• Select your Apple ID, then click Manage Certificates
• Delete all certificates showing "Missing Private Key" (the named one and all the "Untitled" ones)—just hover over each and click the minus button at the bottom left.
• Close the certificates window once you're done.

2. Fix "The user name or passphrase you entered is not correct" #

This usually ties to incorrect password entry or Apple ID security settings:

• If you have Two-Factor Authentication (2FA) enabled on your Apple ID, you can't use your regular password here—you need an App-Specific Password:
  • Log into your Apple ID management page, find the "App-Specific Passwords" section, generate a dedicated password for Xcode, then use this when Xcode prompts you for credentials.
• Double-check that you're entering the right password (not your Mac's login password!)—typos happen easily here.
• If still stuck, open Keychain Access on your Mac, search for your Apple ID, delete any saved password entries related to Xcode or Apple Developer, then try entering your password again in Xcode.

3. Resolve "No profile for 'org.blah.MyProj' were found" #

Personal Team profiles require a unique Bundle ID, so let's fix that:

• Go to your project's General > Signing & Capabilities tab
• Update your Bundle Identifier to something unique—instead of org.blah.MyProj, use a format like com.yourrealname.MyProjTest (replace "yourrealname" with your actual name or a unique identifier)
• Make sure Automatically manage signing is checked, and your Team is set to Me (Personal Team)
• Xcode should now auto-generate a matching provisioning profile. If it doesn't, go back to Preferences > Accounts, select your ID, and click Download Manual Profiles to force a refresh.

4. Extra Troubleshooting Steps #

• Trust Your Mac on iPhone: When you connect your iPhone via USB, you'll see a prompt on the phone asking "Trust This Computer?" Tap "Trust" and enter your iPhone's passcode—this is required for Xcode to communicate with your device.
• Update Xcode & iOS: Make sure you're running the latest version of Xcode (compatible with your iPhone's iOS version). Outdated software often causes signing bugs.
• Clean Build Folder: In Xcode, go to Product > Clean Build Folder (or use the shortcut Cmd + Shift + K) to clear cached build files, then try building again.

内容的提问来源于stack exchange，提问作者pstanton