FontAwesome/Xamarin-从后面的代码无法设置字形 [英] FontAwesome / Xamarin - Setting Glyph not working from code behind

问题描述

在Xamarin上使用FontAwesome时，我在这里丢失了一些东西...从xaml文件进行设置时，按钮可以正常工作，但是当我尝试从其背后的代码进行设置时不显示图标，这是这种情况:

I missing something here when using FontAwesome on Xamarin... the buttons work fine when setting from xaml file but when I try to set from code behind it doesn't show the icon, here is the scenario:

按钮工作正常:

<Button Grid.Row="0" Grid.Column="4" x:Name="btnIdDav" Padding="10" Margin="3" TextColor="#FFF" BackgroundColor="#565C5A" Clicked="btnIdDav_Clicked" WidthRequest="45">
   <Button.ImageSource>
      <FontImageSource FontFamily="{StaticResource FontAwesomeSolidOTF}" Glyph="&#xf039;" Color="#fff"/>
   </Button.ImageSource>
</Button>

上次我必须从代​​码中设置Glyph，为了显示它，我不得不对转换器做一个不好的解决方法"，最后它起作用了(显示图标):

Last time I had to set Glyph from code, I had to do a bad 'workaround' with converter in order to show it, and it worked (icon is showing) in the end:

public const string _dollarGlyph = "\uf155";
public const string _percGlyph = "\uf541";

 public class DescGlyphConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return value;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

Glyph="{Binding DescImage, Converter={StaticResource Key=desconto}}

现在我想创建一个自定义按钮并设置字形，但是图标没有出现(已使用OTF和TTF文件进行了测试):

NOW I want to create a custom button and set the Glyph but the icon is not appearing (tested with both OTF and TTF files):

public static FontImageSource GetImgSource()
        {
            FontImageSource source = new FontImageSource();
            source.FontFamily = Application.Current.Resources["FontAwesomeSolidTTF"].ToString();
            source.Glyph = "\uf3e5";
            source.Color = Color.FromHex("#fff");
            return source;
        }

        public static Style BtnBack() {
            return new Style(typeof(Button))
            {
                Setters = {
                    new Setter { Property = Button.ContentLayoutProperty, Value = new ButtonContentLayout(ButtonContentLayout.ImagePosition.Top, 5) },
                    new Setter { Property = Button.TextProperty, Value = "Back" },
                    new Setter { Property = Button.ImageSourceProperty, Value = GetImgSource()},
                }
            };
        }

有没有建议? 谢谢！

推荐答案

以下是示例代码，请进行相应的更改.我直接使用FontFile名称:

Here is the sample code, please change accordingly. I am using the FontFile name directly:

FontImageSource fontImageSource = new FontImageSource()
        {
            Glyph = "\uf15c",
            Color = Color.Black,
            Size = 18,
            FontFamily = Device.RuntimePlatform == Device.Android ? "FontAwesome.otf#Regular" : null
        };

        this.IconImageSource = fontImageSource;

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