build(ios): Swift compilation errors with Capacitor 8.0.2 in GeolocationCallbackManager.swift

[H40831]

Bug Report

Plugin(s)

@capacitor/geolocation 8.0.0

Capacitor Version

• Capacitor Core: 8.0.2
• Capacitor iOS: 8.0.2

Platform(s)

iOS (Xcode 15.4, iPhone SDK 17.5)

Current Behavior

After upgrading to Capacitor 8.0.2 and @capacitor/geolocation 8.0.0, the iOS project fails to compile in Xcode with the following Swift errors:

• GeolocationCallbackManager.swift:56:62: Missing argument for parameter Preserve aspect ratio capacitor-plugins#2 in call (saveCall)
• GeolocationCallbackManager.swift:112:14: Value of type 'CAPPluginCall' has no member 'reject'
• GeolocationPlugin.swift:70:69: Missing argument for parameter Preserve aspect ratio capacitor-plugins#2 in call

Expected Behavior

The project should compile successfully on iOS with Capacitor 8.x.

Code Reproduction

This occurs in a standard Capacitor 8 environment when adding the @capacitor/geolocation plugin and syncing to iOS.

Other Technical Details

• macOS Sonoma (darwin 23.4.0)
• Swift 5

Additional Context

Important

Technical Disclaimer:
I am reporting this issue based on an AI-assisted investigation. Since I am not an expert in Capacitor's internal Swift architecture, I will not be able to provide further technical details or respond to follow-up questions. Please refer to the analysis below.

Root Cause Analysis (AI generated):
The errors are caused by breaking changes in the Capacitor 8 Swift API:

1. saveCall signature change: bridge.saveCall(call) now requires a second argument plugin: CAPBridgedPlugin.
2. CAPPluginCall method change: The reject method has been removed or modified in the new version, and should be replaced with error().

Suggested Fix:

• Update GeolocationCallbackManager.swift to accept a reference to the plugin and use bridge?.saveCall(call, plugin: self.plugin).
• Replace call.reject(message, code) with call.error(message, code).

[OS-pedrogustavobilro]

Hey @H40831, thanks for opening this.

I see you mention you have Xcode 15, Capacitor 8 requires updating to Xcode 26, which could be what's causing the issue - Refer to https://capacitorjs.com/docs/updating/8-0#ios. The page also contains other information that is relevant to properly update your app to Capacitor 8.

Hope it helps!

[OS-pedrogustavobilro]

Based on a similar issue reported at ionic-team/capacitor#8333, the solution involves using Xcode 26 with Capacitor 8, as suggested in the comment above.

As such, I'll be closing this issue. Feel free to re-open if you are having issues with Capacitor 8 with Xcode 26. Thank you!