我正在學(xué)習(xí) Xamarin 的布局并面對以下代碼：<?xml version="1.0" encoding="utf-8" ?><ContentPage xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" xmlns:local="clr-namespace:MyApp.Validators" x:Class="MyApp.MainPage"> <StackLayout HorizontalOptions="Fill" > <Grid> <Grid.RowDefinitions> <RowDefinition Height="*" ></RowDefinition> <RowDefinition Height="*"></RowDefinition> <RowDefinition Height="*"></RowDefinition> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition ></ColumnDefinition> </Grid.ColumnDefinitions> <Grid Grid.Row="0" Grid.Column="0"> <Grid.RowDefinitions> <RowDefinition Height="*" ></RowDefinition> <RowDefinition Height="*"></RowDefinition> <RowDefinition Height="*"></RowDefinition> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition></ColumnDefinition> </Grid.ColumnDefinitions> <Entry x:Name="Username" Grid.Row="0" Placeholder="Username" PlaceholderColor="Blue"> <Entry.Behaviors> <local:UsernameValidatorBehavior></local:UsernameValidatorBehavior> </Entry.Behaviors> </Entry> <Entry x:Name="Password" Grid.Row="1" Keyboard="Numeric" Placeholder="Password" PlaceholderColor="Blue"> <Entry.Behaviors> <local:PasswordValidatorBehavior></local:PasswordValidatorBehavior> </Entry.Behaviors> </Entry>我的問題是我嘗試使用<Grid VerticalOptions="End" Grid.Row="1" Grid.Column="0">使兩個(gè)按鈕位于屏幕底部，但它顯示在屏幕中間。如何解決這個(gè)問題呢？
1 回答
肥皂起泡泡
TA貢獻(xiàn)1829條經(jīng)驗(yàn) 獲得超6個(gè)贊
下面的代碼將為您工作，將 VerticalOptions="FillAndExpand" 添加到 Grid 并提供百分比高度。
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:MyApp.Validators"
x:Class="MyApp.MainPage">
<StackLayout HorizontalOptions="Fill">
<Grid VerticalOptions="FillAndExpand">
<Grid.RowDefinitions>
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
<RowDefinition Height="7*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Entry x:Name="Username" Grid.Row="0" Grid.ColumnSpan="2" Placeholder="Username" PlaceholderColor="Blue">
<Entry.Behaviors>
<local:UsernameValidatorBehavior></local:UsernameValidatorBehavior>
</Entry.Behaviors>
</Entry>
<Entry x:Name="Password" Grid.Row="1" Grid.ColumnSpan="2" Keyboard="Numeric" Placeholder="Password" PlaceholderColor="Blue">
<Entry.Behaviors>
<local:PasswordValidatorBehavior></local:PasswordValidatorBehavior>
</Entry.Behaviors>
</Entry>
<Entry x:Name="Email" Grid.Row="2" Grid.ColumnSpan="2" Placeholder="Email" PlaceholderColor="Blue">
<Entry.Behaviors>
<local:EmailValidatorBehavior></local:EmailValidatorBehavior>
</Entry.Behaviors>
</Entry>
<Button x:Name="Submit" Grid.Row="3" Grid.Column="0" VerticalOptions="EndAndExpand" Text="Submit" Clicked="OnButtonClicked"></Button>
<Button x:Name="Cancel" Grid.Row="3" Grid.Column="1"
VerticalOptions="EndAndExpand" Text="Cancel" Clicked="Cancel_Clicked"></Button>
</Grid>
</StackLayout>
</ContentPage>
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