Xcode编译报错No architectures to compile for，请求排查问题原因

Hey there, let's break down and fix this architecture mismatch issue you're facing!

What's causing the error? #

The problem is straightforward: your project is set to compile for the arm64 architecture (configured in ARCHS), but your VALID_ARCHS list only includes armv6 and armv7. Since there's no overlap between these two sets, the compiler can't figure out which architecture to build for—hence the frustrating error.

Step-by-step fixes #

Here are a few actionable ways to resolve this, depending on your project's needs:

• Add arm64 to VALID_ARCHS

  1. Open your Xcode project, select your target, and switch to the Build Settings tab.
  2. Search for VALID_ARCHS (you may need to toggle from "Basic" to "All" settings to see it).
  3. Update the value to include arm64, making it: armv6 armv7 arm64.
  4. Confirm your ARCHS setting still includes arm64 (it already does in your case) so the two lists have overlapping architectures.

• Simplify VALID_ARCHS for modern projects
  If you don't need to support extremely old devices (armv6 is practically obsolete now), you can:

  1. Set VALID_ARCHS to armv7 arm64.
  2. Ensure ARCHS is set to a compatible option like Standard architectures (armv7, arm64) or just arm64 if you only target newer iOS devices.

• Remove VALID_ARCHS entirely (recommended for newer Xcode versions)
  Recent Xcode versions handle valid architectures automatically based on your ARCHS setting and target iOS version. You can:

  1. Select the VALID_ARCHS row in Build Settings.
  2. Press the delete key to remove the setting entirely.
  3. Clean your project (press Cmd + Shift + K) and rebuild—this also clears any stale build cache that might cause issues.

Extra tips #

• If you're using CocoaPods, double-check that your Pods targets have matching architecture settings. You might need to run pod install again after updating your project's config.
• After making changes, it's a good idea to delete your derived data (Xcode > Settings > Locations > Derived Data > Delete) to avoid any lingering build artifacts causing unexpected problems.

内容的提问来源于stack exchange，提问作者user979331