[英]How to change font style or override default font style for complete Application in Xamarin.Android
[英]Change default font of the application Xamarin Forms
要更改 NavigationBar 中的標題字體,請閱讀此文檔,在每個 contentPage 中自定義Shell.TitleView
:
<Shell.TitleView>
<Label Text="customTitle" FontSize="30"/>
</Shell.TitleView>
要更改標簽欄標題字體,您需要一個自定義渲染器:
[assembly: ExportRenderer(typeof(AppShell), typeof(MyShellRenderer))]
namespace App30.Droid
{
public class MyShellRenderer : ShellRenderer
{
public MyShellRenderer(Context context) : base(context)
{
}
protected override IShellBottomNavViewAppearanceTracker CreateBottomNavViewAppearanceTracker(ShellItem shellItem)
{
return new CustomBottomNavAppearance();
}
}
public class CustomBottomNavAppearance : IShellBottomNavViewAppearanceTracker
{
public void Dispose()
{
}
public void ResetAppearance(BottomNavigationView bottomView)
{
}
public void SetAppearance(BottomNavigationView bottomView, ShellAppearance appearance)
{
IMenu menu = bottomView.Menu;
for (int i = 0; i < bottomView.Menu.Size(); i++)
{
IMenuItem menuItem = menu.GetItem(i);
var title = menuItem.TitleFormatted;
SpannableStringBuilder sb = new SpannableStringBuilder(title);
int a = sb.Length();
//here I set fontsize 20
sb.SetSpan(new AbsoluteSizeSpan(20,true), 0, a, SpanTypes.ExclusiveExclusive);
menuItem.SetTitle(sb);
}
}
}
}
結果如下:
此處已上傳示例項目,您可以查看它。
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