xamarin/Xamarin.Forms

[Bug] Setting Frame ControlTemplate causes the whole page to be blank

Open

#9,480 建立於 2020年2月8日

在 GitHub 查看
 (7 留言) (0 反應) (0 負責人)C# (5,644 star) (1,926 fork)batch import
a/framee/2 :clock2:help wantedp/UWPt/bug :bug:up-for-grabs

描述

When trying to set ControlTemplate of a Frame, all other elements will disappear, no errors thrown

Steps to Reproduce

<Frame>
	<Label Text="This is from templated content" />
	<Frame.ControlTemplate>
		<ControlTemplate>
			<Grid BackgroundColor="Red">
				<ContentPresenter />
			</Grid>
		</ControlTemplate>
	</Frame.ControlTemplate>
</Frame>

Expected Behavior

All element to keep appearing on the page, and also the frame to be templated as it is a ContentView

Actual Behavior

The control template is not applied, and all other elements on the page will disappear

Project

FrameControlTemplate.zip

貢獻者指南

技術棧
csharp
領域
mobilefrontend
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-3 hours
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
C#XAMLXamarin.Forms basics
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
50
研究方向
Investigate the Frame control template rendering in Xamarin.Forms. The bug occurs when a Frame's ControlTemplate is set, causing all other page elements to disappear. Start by examining the Frame's default template and how ContentPresenter is used. Look at the FrameRenderer in platform specific code (e.g., iOS, Android) to see if the template is applied correctly. Consider whether the issue relates to the VisualStateManager or layout cycle. Check linked comments for any hints or partial fixes.
[Bug] Setting Frame ControlTemplate causes the whole page to be blank · xamarin/Xamarin.Forms#9480 | Good First Issue