NullReferenceException during PopAsync on iOS

[CometSL9]

🐛 Bug Report

When using PopAsync, a NullReferenceException is thrown - only on iOS. Under WPF, no problem at all...

Version: 2.0.0.12

Platform:

• [X] :iphone: iOS 14.4

**Stacktrace: at Rg.Plugins.Popup.IOS.Impl.PopupPlatformIos.RemoveAsync (Rg.Plugins.Popup.Pages.PopupPage page) [0x001fb] in Z:\Documents\OpenSource\Rg.Plugins.Popup\Rg.Plugins.Popup\Platforms\Ios\Impl\PopupPlatformIos.cs:104 at Rg.Plugins.Popup.Services.PopupNavigationImpl+<>cDisplayClass23_0.b0 () [0x0018d] in Z:\Documents\OpenSource\Rg.Plugins.Popup\Rg.Plugins.Popup\Services\PopupNavigationImpl.cs:151 at Rg.Plugins.Popup.Services.PopupNavigationImpl+<>cDisplayClass28_0.b0 () [0x00025] in Z:\Documents\OpenSource\Rg.Plugins.Popup\Rg.Plugins.Popup\Services\PopupNavigationImpl.cs:210 at <_MyPage.ClosePage_> () [0x00069] in <320ef7e7629f4c1dbaa57b140e453ef2>:0

Code in MyPage.ClosPage is quite simple:

private void ClosePage() {
    PopupNavigation.Instance.PopAsync();
}

The page is pushed in the Main Page's constructor via: PopupNavigation.Instance.PushAsync(myPage);

[LuckyDucko]

Hey @CometSL9 Could you provide a working case example project. I have a hunch that something else is causing the problem, because PopAsync has been working fine under my own usage.

[CometSL9]

Hi LuckyDucko,

As I had to solve the problem immediately, I completely threw out Rg.Plugins.Popup from my project. Therefore, no repo is possibly any more. I guess it had something to do with the new iOS 14.4 and/or the nex Xcode (as it appeared with the iOS update date).

Just my 2 cents: Use Xamarin ContentPage, make its background partly transparent (full transparency does not work on iOS, use ~95 %) -> No Rg.lugins.Popup any more.

[LuckyDucko]

It was most likely not awaiting the popAsync mixed with calling popAsync on the page you are trying to call that lead to the NullReference Exception.

However, glad you worked out a way around the issue.