根据如何在TabBar中移除或隐藏文本的答案.NET MAUI?,可以进行以下操作。
您可以更改TabBar标题的字体和字号。
在Android中:
您需要在Platforms/Android/Renderers
中添加自定义渲染器。
[assembly: ExportRenderer(typeof(Shell), typeof(CustomShellRenderer))]
namespace YourApp.Platforms.Android.Renderers;
public class CustomShellRenderer : ShellRenderer
{
public CustomShellRenderer(Context context) : base(context)
{
}
protected override IShellBottomNavViewAppearanceTracker CreateBottomNavViewAppearanceTracker(ShellItem shellItem)
{
return new CustomBottomNavViewAppearanceTracker(this, shellItem);
}
}
public class CustomBottomNavViewAppearanceTracker : ShellBottomNavViewAppearanceTracker
{
public override void SetAppearance(BottomNavigationView bottomView, IShellAppearanceElement appearance)
{
base.SetAppearance(bottomView, appearance);
var font = Typeface.CreateFromAsset(ShellContext.AndroidContext.Assets, "FONTFILENAME.ttf");
var spanFace = new CustomTypefaceSpan("", font, FONTSIZE);
bottomView.LayoutDirection = LayoutDirection.Rtl;
var menu = bottomView.Menu;
for (var i = 0; i < menu.Size(); i++)
{
var menuItem = menu.GetItem(i);
if (menuItem == null) continue;
var spannableString = new SpannableString(menuItem.TitleCondensedFormatted);
spannableString.SetSpan(spanFace, 0, spannableString.Length(), SpanTypes.ExclusiveExclusive);
menuItem.SetTitle(spannableString);
}
}
public CustomBottomNavViewAppearanceTracker(IShellContext shellContext, ShellItem shellItem) : base(shellContext, shellItem)
{
ShellContext = shellContext;
}
private IShellContext ShellContext { get; }
}
}
public class CustomTypefaceSpan : TypefaceSpan
{
private float? FontSize { get; }
private readonly Typeface _typeface;
public CustomTypefaceSpan(string family, Typeface typeface, float? fontSize = null) : base(family)
{
FontSize = fontSize;
_typeface = typeface;
}
public override void UpdateDrawState(TextPaint ds)
{
ApplyCustomTypeFace(ds, _typeface);
}
public override void UpdateMeasureState(TextPaint paint)
{
ApplyCustomTypeFace(paint, _typeface);
}
private void ApplyCustomTypeFace(Paint paint, Typeface tf)
{
if (FontSize != null && FontSize != 0)
paint.TextSize = FontSize.Value;
paint.SetTypeface(tf);
}
}
在
MauiProgram.cs
中添加一个调用
builder
对象的代码段。
.ConfigureMauiHandlers(handlers =>
{
#if ANDROID
handlers.AddHandler(typeof(Shell), typeof(Platforms.Android.Renderers.CustomShellRenderer));
#endif
});
我会研究iOS并相应地更新代码。