Xcode 9.2迁移项目至新电脑遇警告及崩溃问题求助

Hey there, I’ve run into this exact issue multiple times when moving projects between machines—let’s get this sorted out for you!

First, let’s break down the root cause #

That signing warning and the dyld crash on your iPhone are directly linked: when you migrated the project, your new computer doesn’t have the proper developer certificates/config profiles, or the trust chain for your existing certs is broken. iOS blocks apps that aren’t properly signed by a trusted developer, hence the immediate crash.

Step-by-step fixes: #

• Refresh your developer certificates & profiles
  Open Xcode, hit Cmd+, to open Preferences, go to the Accounts tab. Select your Apple ID, click "Manage Certificates". Delete any existing iOS Development certificates, then click the + button at the bottom left and re-add the iOS Development certificate.

  Next, head to your project’s Signing & Capabilities tab. Make sure your Team is selected correctly, then either check "Automatically manage signing" (Xcode will handle profiles for you) or click "Download Manual Profiles" to grab the right ones for your project.

• Trust your developer certificate on your iPhone
  Connect your phone to your computer, then on your iPhone go to Settings > General > VPN & Device Management. Find the certificate tied to your Apple ID, tap it, then select "Trust [Your Apple ID]" and confirm the prompt. This tells iOS your developer account is safe to run apps from.

• Wipe build caches (this is magic sometimes)
  Hit Cmd+Shift+K to clean the build folder in Xcode. For extra measure, go to Xcode > Preferences > Locations, click the arrow next to Derived Data, and delete the folder associated with your project. Old cached signing data can mess things up after a migration.

• Double-check project vs target signing settings
  Sometimes when moving projects, the Project-level and Target-level signing settings get out of sync. Go to both your Project and Target’s Signing & Capabilities tabs, ensure the Team is the same, and that signing is configured consistently. You can also check the Build Settings tab for Code Signing Identity—make sure Debug/Release are set to "iOS Developer" (if auto-managing signing, this should handle itself, but it’s worth verifying).

• Restart everything
  Close Xcode, disconnect your iPhone, restart both your computer and phone, then reconnect and try building again. Sometimes a fresh start clears out lingering glitches.

If you follow these steps, that signing warning should disappear, and your app should run smoothly on your iPhone without the dyld crash.

内容的提问来源于stack exchange，提问作者Chewie The Chorkie