button - Xamarin Forms DisplayAlert 按钮 TextColor

Question

如何更改 Xamarin Forms DisplayAlert 对话框上的按钮文本颜色？

Answer 1

FWIW，我选择在 XAML 中创建一个新的 ContentPage 并使用 Navigation.PushModalAsync 显示它。就我而言，这是模拟警报并保持对所有样式的控制的最简单方法。

XAML:

<?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="YourNamespace.AlertPage"
             BackgroundColor="DarkGray"
             Padding="40">
    <ContentPage.Content>
        <StackLayout BackgroundColor="White" Padding="10">
            <Label x:Name="lblTitle" FontAttributes="Bold" FontSize="Large" Text="Title" HorizontalOptions="Center"></Label>
            <BoxView HeightRequest="1" BackgroundColor="DarkGray"></BoxView>
            <ScrollView Orientation="Vertical" VerticalOptions="FillAndExpand">
                <Label x:Name="lblText" FontSize="Medium"></Label>
            </ScrollView>
            <BoxView HeightRequest="1" BackgroundColor="DarkGray"></BoxView>
            <StackLayout Orientation="Horizontal">
                <Button x:Name="btn1" Text="Button 1" HorizontalOptions="CenterAndExpand"></Button>
                <Button x:Name="btn2" Text="Button 2" HorizontalOptions="CenterAndExpand"></Button>
            </StackLayout>
        </StackLayout>
    </ContentPage.Content>
</ContentPage>

C#:

public partial class AlertPage : ContentPage
{
    public Label LblTitle
    {
        get
        {
            return lblTitle;
        }
    }

    public Label LblText
    {
        get
        {
            return lblText;
        }
    }

    public Button Button1
    {
        get
        {
            return btn1;
        }
    }

    public Button Button2
    {
        get
        {
            return btn2;
        }
    }

    public AlertPage()
    {
        InitializeComponent();
    }
}

实现:

var ap = new AlertPage();
ap.LblTitle.Text = "Instructions";
ap.LblText.Text = "The text to display!";
ap.Button1.Text = "Done";
ap.Button1.Clicked += async (s, a) =>
{
    await Navigation.PopModalAsync();
};
ap.Button2.IsVisible = false;
await Navigation.PushModalAsync(ap);

截图: