在相对布局(XAML)中布局项
本文关键字:布局 相对 XAML | 更新日期: 2023-09-27 18:00:52
我正在尝试一个水平居中的图像,然后在其下方放置一个文本框,也水平居中。
从我看到的所有例子来看,在硬编码之前,需要知道相对视图的宽度和高度。当然不是这样吗?
以下是我迄今为止所做的尝试。
<RelativeLayout>
<Image x:Name="logo" Source="logo.png" HorizontalOptions="CenterAndExpand"/>
<StackLayout Orientation="Horizontal"
BackgroundColor="Lime"
RelativeLayout.XConstraint="{ConstraintExpression Type=RelativeToParent,
Property=Width,
Factor=0.5"
RelativeLayout.YConstraint="{ConstraintExpression Type=RelativeToView,
ElementName=logo
Property=Y,
Constant=100}">
<Entry Text="{Binding Email, Mode=TwoWay}" Keyboard="Email" x:Name="signUpemailEntry" Placeholder="Email" TextColor="#2980b9" WidthRequest="270" BackgroundColor="Fuchsia">
<Entry.Behaviors>
<behave:EmailValidatorBehaviour x:Name="signUpemailValidator"/>
</Entry.Behaviors>
</Entry>
<Image x:Name="signUpemailSuccessErrorImage"
Style="{Binding Source={x:Reference emailValidator},
Path=IsValid,
Converter={StaticResource boolToStyleImage}}"/>
</StackLayout>
</RelativeLayout>
不确定这是否是您所需要的,但为了实现您的目标,您需要将图像和文本放在RelativeLayout内的同一StackLayout中。
<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="TestRelativeLayout.MyPage">
<ContentPage.Content>
<RelativeLayout>
<StackLayout Orientation="Vertical">
<Image x:Name="logo" Source="postage1.jpg" HorizontalOptions="Center"/>
<Entry Text="Test" Keyboard="Email" x:Name="signUpemailEntry"
Placeholder="Email" TextColor="#2980b9" WidthRequest="270"
BackgroundColor="Fuchsia"
HorizontalOptions="Center"/>
</StackLayout>
</RelativeLayout>
</ContentPage.Content>
</ContentPage>