Bug 205448 – navigator.getGamepads() returns empty array in my WKWebView app

• Status: RESOLVED
• Resolution: WORKSFORME
• Component: WebCore Misc.

[Iain]

It's currently not possible to use the GamePad API within a hybrid application. Using the navigator.getGamePads() method in a WKWebview returns an empty array when a gamepad is attached, even after user interaction. Whereas Safari on the same device will return an array containing a Gamepad instance after user interaction.

I tried adding the Wireless Accessory Configuration capability to the application, but it had no effect. This was the only plausible sounding capability in the list.

Replication:
1. Connect gamepad to iOS device using bluetooth ( Dualshock 4 controllers are easy to setup )
2. Load http://luser.github.io/gamepadtest/
3. Press any button on the device ( required to "wakeup" the API )

Expected result:
Page displays controller status

Actual result:
Nothing happens

For a more minimal test you can call navigator.getGamePads() from the console and inspect the results.

Application was built in Xcode 11.3 (11C29) targeting iOS 12.0 and tested on iPad Pro ( ML0H2ZP/A ) on iPadOS 13.2.3 (17B111) with Sony DS4 ( CUH-ZCT1E ).

[Radar WebKit Bug Importer]

<rdar://problem/58119044>

[Brady Eidson]

Gamepads work in Safari, and Safari is WKWebView based.

There's *plenty* of WKWebView specific support to make this work.

We need more specifics to find out why it's not working in your app.

[Brady Eidson]

OH sorry - Figured it out:

> Application was built in Xcode 11.3 (11C29) targeting iOS 12.0 and tested on iPad Pro ( ML0H2ZP/A ) on iPadOS 13.2.3 (17B111) with Sony DS4 ( CUH-ZCT1E ).

It's not expected the DS4 would work on iOS 12.

It's works on iOS 13+.