iOS Objective-C依赖错误求助：需配置SWIFT_VERSION至支持版本

Hey there, I’ve run into this exact issue a few times when working with mixed Swift/Objective-C projects, so let’s break down how to fix it quickly:

Step 1: Select the Correct Target in Xcode #

First, make sure you’re editing the right target (not the project itself). In Xcode’s left sidebar, click on your project name, then select the Swift-based target that’s throwing the error from the list under "Targets".

Step 2: Navigate to Build Settings #

Click on the "Build Settings" tab at the top. If you don’t see all settings, toggle the "All" button (instead of "Basic") to show every available configuration.

Step 3: Find and Set SWIFT_VERSION #

• Use the search bar at the top right of the Build Settings panel to search for SWIFT_VERSION.
• You’ll see a row labeled "Swift Language Version"—click on the current value (it might be empty or set to an outdated version).
• From the dropdown menu, select a supported Swift version (usually the latest stable version compatible with your Xcode version, like Swift 5.9 if you’re on Xcode 15).

Bonus: Check Dependencies (If Using CocoaPods) #

If your Swift target depends on an Objective-C pod, sometimes the pod’s target might inherit incorrect settings. Here’s a quick fix:

• Open your Podfile and add this snippet for your target (replace YourTargetName with your actual target name):

  target 'YourTargetName' do
    use_frameworks!
    # Your pods here...
    
    post_install do |installer|
      installer.pods_project.targets.each do |target|
        target.build_configurations.each do |config|
          config.build_settings['SWIFT_VERSION'] = '5.9' # Match your main target's Swift version
        end
      end
    end
  end
  

• Run pod install again to apply the changes.

Verify the Fix #

After setting the SWIFT_VERSION, clean your project (Cmd + Shift + K) and rebuild (Cmd + B). The error should disappear if everything’s configured correctly.

Pro tip: Make sure all targets in your project (including test targets) have the same SWIFT_VERSION set to avoid similar issues down the line.

内容的提问来源于stack exchange，提问作者Salon Seat