[iOS] Font not supported by platform

[Bardiamist]

Checklist

• [x] This issue is NOT related to the charting library itself

Describe the bug

My team tried to deploy app to TestFlight and we got next

Dear Developer,
We identified one or more issues with a recent submission for TestFlight review for your app, "APP_NAME" 1.0.0 (1). Please correct the following issues, then upload again.
ITMS-90853: Invalid font - There was an error validating the font at 'my.app/tradingView/charting_library/bundles/40f9a03d174178efb12303caa9bc7cd8.woff2'. Font not supported by platform.
ITMS-90853: Invalid font - There was an error validating the font at 'my.app/tradingView/charting_library/bundles/3293616ec0c605c7c2db25829a0a509e.woff'. Font not supported by platform.
Best regards,
The App Store Team

To Reproduce

Steps to reproduce the behavior:

1. Try to upload example to TestFlight

Expected behavior

App should be uploaded successfuly.

[timocov]

It seems that iOS supports that type of fonts since 10 version https://caniuse.com/?search=woff2. It's possible that the TestFlight team interprets that font like you're trying to use them inside the native app instead inside a webview?

[Bardiamist]

It's possible that the TestFlight team interprets that font like you're trying to use them inside the native app instead inside a webview?

Should be yes. But other developers started to have the same problem from Xcode 12. I see that the same error code can happen also when the TTF font is invalid. So maybe need to replace WOFF files by valid (according to Apple).

[timocov]

So maybe need to replace WOFF files by valid (according to Apple).

Can you please elaborate what is "valid according by Apple"? I mean, maybe we can fix it somehow from our end (nevertheless I believe these fonts are valid though).

[timocov]

@Bardiamist can you please check suggestion from https://stackoverflow.com/questions/64348482/itms-90853-invalid-font-on-testflight-external-testing?

@makedonsky94 can you please take a look?

[Bardiamist]

valid according by Apple

I don't know why Apple thinks this files is not supported.

@Bardiamist can you please check suggestion from https://stackoverflow.com/questions/64348482/itms-90853-invalid-font-on-testflight-external-testing?

I tried to use this CR8 Software program. But this program don't support WOFF.

[Bardiamist]

Now I just removed both files. Where is using that fonts?

[timocov]

I believe it's different format of the same font and it's used in icon tool: