Disable InteractivePopGestureRecognizer for specific page

[Divyesh-Bhatt]

Description

In iOS 15 and above we can perform back navigation using swipe (from left edge of the device). I've noticed that on initial page which is not of type of navigation page if we perform this swipe the app is getting crash in iOS.

To fix this I've found this work around https://learn.microsoft.com/en-us/answers/questions/306452/disable-xamarin-shell-flyout-swipe-gesture

But this disables the swipe for entire app, which is not intended. So how to make it page specific?

Public API Changes

ShellPage

Intended Use-Case

Disable Swipe back gesture for iOS when needed for specific page.

[anitatrifunovska]

To disable the swipe back gesture for iOS on a specific page, you can try the following approach. Hope it helps !

public TestPage( )
{
    InitializeComponent();
    this.Loaded += TestPage_Loaded;
}

private void TestPage_Loaded(object? sender, EventArgs e)
{
#if IOS
    if (Handler is IPlatformViewHandler platformViewHandler)
    {
        var controller = platformViewHandler.ViewController?.NavigationController;
        if (platformViewHandler.ViewController?.NavigationController != null)
        {
            platformViewHandler.ViewController.NavigationController.InteractivePopGestureRecognizer.Enabled = false;
        }
    }
#endif
}

protected override void OnDisappearing()
{
    base.OnDisappearing();
    this.Loaded -= TestPage_Loaded;
}

[urnotjl]

To disable the swipe back gesture for iOS on a specific page, you can try the following approach. Hope it helps !

public TestPage( )
{
    InitializeComponent();
    this.Loaded += TestPage_Loaded;
}

private void TestPage_Loaded(object? sender, EventArgs e)
{
#if IOS
    if (Handler is IPlatformViewHandler platformViewHandler)
    {
        var controller = platformViewHandler.ViewController?.NavigationController;
        if (platformViewHandler.ViewController?.NavigationController != null)
        {
            platformViewHandler.ViewController.NavigationController.InteractivePopGestureRecognizer.Enabled = false;
        }
    }
#endif
}

protected override void OnDisappearing()
{
    base.OnDisappearing();
    this.Loaded -= TestPage_Loaded;
}

Works like a charm,thanks!

I thought have to go through https://learn.microsoft.com/en-us/answers/questions/1143556/how-to-disable-the-swipe-back-in-ios-using-net-mau with Shell , saving much efforts !

Plus might have to mark as ... InteractivePopGestureRecognizer.Enabled = True; in OnDisappearing() as well, if anyone keen on making rest navigation pages swipeable?

[anitatrifunovska]

Yes, I just tested it and you do need to enable it in the OnDisappearing() method.

[cmattes]

Works great! Thanks!