fix(ios): topbar liquid glass

[johann9898]

Platforms affected

IOs

Motivation and Context

iOS 26 introduced the new “Liquid Glass” appearance, which caused the InAppBrowser tool bar to become transparent and top bar buttons to appear translucent.
This change fixes that issue.

Description

This PR fixes the top bar “Liquid Glass” issue on iOS 26+ that to have background color of the tool bar same as the _browserOptions.toolbarcolor

Testing

Tested this by adding the changes of this plugin in to the app

Tested the top bar with default with toolbar in the bottom

The color might be slightly off by the brightness of the color to the one without the liquid glass

[breautek]

I don't believe these checks are sufficient as it assumes that the environment is running at least XCode 26 and Cordova iOS framework declares support for XCode 15 and later.

There is a way to do a preprocessor check that is more resilient to the XCode environment, I just don't recall the exact syntax for that.

[erisu]

The preprocessor check might be this, but I don’t remember exactly.

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 260000
    if (@available(iOS 26.0, *)) {
        self.closeButton.hidesSharedBackground = YES;
    }
#endif

[johann9898]

Thanks, i will add the preprocessor check too

[diogenesricardo]

The clipboard buttons are also a problem; I am working to figure out how to fix them.

[GitToTheHub]

@johann9898 By default, the toolbar is shown at the bottom. Please keep this also in mind, when you test your changes.

[GitToTheHub]

Your changes do not work, when showing the in-app browser over a webview with a green background with default settings. Also the toolbar background is not set by default to semi-transparent:

Without your changes it would like this:

[GitToTheHub]

I created an issue, which give all details about this issue: #1098