xamarin/Xamarin.Forms
NavigationPage.HasBackButton binding doesn't work on iOS
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#3,389 建立於 2018年7月24日
e/3 :clock3:help wantedinactivep/iOS 🍎t/bug :bug:up-for-grabs
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描述
Description
NavigationPage.HasBackButton binding doesn't work on iOS (works on android)
Steps to Reproduce
- Bind NavigationPage.HasBackButton in xaml to a bool (initialize to false) in the view model
- Wait a bit after the page loads, and change the bool to true
Expected Behavior
Back button should appear when the bool is set to true
Actual Behavior
The PropertyChanged notification of the bool does not cause the back button to appear.
Basic Information
- Version with issue: 3.1.0.637273
- Last known good version: Unknown
- IDE: Vs 15.7.5
- Platform Target Frameworks: .NetStandard 2.0
- iOS: 11.4
- Nuget Packages:
- Affected Devices: iPhone
Reproduction Link
Download the zip, deploy the ios project, click one of the list items, click the EnableBackButton Button. IT doesnt work. Deploy it on android, and it works properly.