我的设计师为输入框创建了一个背景图片,看起来像这样:
我如何在Xamarin.Forms中实现这个效果? 我猜容易的部分是去掉边框,但我还需要将它定位在该图像的顶部(我会使用RelativeLayout)并设置其正确大小以“填充”图像的剩余部分(难度较大)。 我正在使用XAML,但如果您知道C#,那也可以,没问题。 有什么建议吗?
编辑:
到目前为止,这是我做到的:
代码:
<RelativeLayout>
<Image Source="input_selected.png"></Image>
<StackLayout Orientation="Horizontal" HorizontalOptions="CenterAndExpand">
<Image Source="ico_password.png" Scale="0.7"></Image>
<Entry x:Name="PasswordT" Placeholder="Senha" IsPassword="True" HorizontalOptions="CenterAndExpand" Text=""></Entry>
</StackLayout>
</RelativeLayout>
编辑2:
<?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="LoginPage"
Style="{StaticResource LoginBackground}">
<ScrollView>
<RelativeLayout x:Name="RelativeLayoutLogin">
<StackLayout x:Name="BackgroundLayout" Spacing="15" HorizontalOptions="Center" VerticalOptions="Start">
<StackLayout.Padding>
<OnPlatform x:TypeArguments="Thickness" iOS="15, 38, 15, 15" Android="15, 18, 15, 15" WinPhone="15, 18, 15, 15" />
</StackLayout.Padding>
<StackLayout.Children>
<Image Source="logo.png" Aspect="AspectFit" HeightRequest="75"></Image>
<Image x:Name="BackgroundBox" Source="box_completo.png" Aspect="AspectFill"></Image>
</StackLayout.Children>
</StackLayout>
<StackLayout RelativeLayout.YConstraint="{ConstraintExpression Type=RelativeToView, ElementName=BackgroundLayout, Property=Y, Constant=111}"
RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToView, ElementName=BackgroundLayout, Property=Width, Factor=1}">
<!--<StackLayout.Padding>
<OnPlatform x:TypeArguments="Thickness" iOS="15, 38, 15, 15" Android="15, 18, 15, 15" WinPhone="15, 18, 15, 15" />
</StackLayout.Padding>-->
<RelativeLayout>
<Image Source="input.png" x:Name="BgUsername"></Image>
<Image Source="input_selected.png" x:Name="SelectedBgUsername" IsVisible="False"></Image>
<StackLayout RelativeLayout.XConstraint="{ConstraintExpression Type=Constant, Constant=8}"
RelativeLayout.YConstraint="{ConstraintExpression Type=Constant, Constant=8}"
RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Constant=-16}"
RelativeLayout.HeightConstraint="{ConstraintExpression Type=RelativeToParent, Property=Height, Constant=-16}"
Orientation="Horizontal">
<Image Source="ico_user.png" Scale="0.6"></Image>
<Entry x:Name="UsernameOrEmail" Placeholder="Nome de usuário" IsEnabled="True" HorizontalOptions="FillAndExpand" Text="" TextColor="Black"></Entry>
</StackLayout>
</RelativeLayout>
<RelativeLayout>
<Image Source="input.png" x:Name="BgPassword"></Image>
<Image Source="input_selected.png" x:Name="SelectedBgPassword" IsVisible="False"></Image>
<StackLayout RelativeLayout.XConstraint="{ConstraintExpression Type=Constant, Constant=8}"
RelativeLayout.YConstraint="{ConstraintExpression Type=Constant, Constant=8}"
RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Constant=-16}"
RelativeLayout.HeightConstraint="{ConstraintExpression Type=RelativeToParent, Property=Height, Constant=-16}"
Orientation="Horizontal">
<Image Source="ico_password.png" Scale="0.6"></Image>
<Entry x:Name="Password" Placeholder="Senha" IsPassword="True" HorizontalOptions="FillAndExpand" Text="" TextColor="Black"></Entry>
</StackLayout>
</RelativeLayout>
<!--<RelativeLayout Scale="0.85">
<Image Source="input.png" x:Name="BgUsername"></Image>
<Image Source="input_selected.png" x:Name="SelectedBgUsername" IsVisible="False"></Image>
<StackLayout Orientation="Horizontal" HorizontalOptions="CenterAndExpand" Padding="15, 5, 0, 0">
<Image Source="ico_user.png" Scale="0.6"></Image>
<Entry x:Name="UsernameOrEmail" Placeholder="Nome de usuário" IsEnabled="True" WidthRequest="300" HorizontalOptions="CenterAndExpand" Text="" TextColor="Black"></Entry>
</StackLayout>
</RelativeLayout>
<RelativeLayout Scale="0.85">
<Image Source="input.png" x:Name="BgPassword"></Image>
<Image Source="input_selected.png" x:Name="SelectedBgPassword" IsVisible="False"></Image>
<StackLayout Orientation="Horizontal" HorizontalOptions="CenterAndExpand" Padding="10, 5, 0, 0">
<Image Source="ico_password.png" Scale="0.6"></Image>
<Entry x:Name="Password" Placeholder="Senha" IsPassword="True" HorizontalOptions="CenterAndExpand" WidthRequest="300" Text="" TextColor="Black"></Entry>
</StackLayout>
</RelativeLayout>-->
<Image x:Name="LoginButtonFm" Style="{StaticResource FmLoginButton}" Scale="0.85"></Image>
<Label Text="OU" TextColor="Black" HorizontalOptions="CenterAndExpand"></Label>
<Image x:Name="LoginButtonFacebook" Style="{StaticResource FacebookLoginButton}" Scale="0.85"></Image>
<Image x:Name="LoginButtonGoogle" Style="{StaticResource GoogleLoginButton}" Scale="0.85"></Image>
<Image x:Name="LoginButtonTwitter" Style="{StaticResource TwitterLoginButton}" Scale="0.85"></Image>
</StackLayout>
</RelativeLayout>
</ScrollView>
</ContentPage>
谢谢!