UE5中按钮圆角，设置边框

FSlateBrush NormalBrush;

NormalBrush.DrawAs = ESlateBrushDrawType::RoundedBox;

NormalBrush.TintColor = FLinearColor(245 / 255.f, 245 / 255.f, 1.0f); //

NormalBrush.OutlineSettings.CornerRadii = FVector4(1.0f, 1.0f, 1.0f, 1.0f); // 圆角半径，分别对应4个角

NormalBrush.OutlineSettings.RoundingType = ESlateBrushRoundingType::FixedRadius;

NormalBrush.OutlineSettings.Color = FLinearColor(150 / 255.f, 150 / 255.f, 1.0f); //边框颜色

NormalBrush.OutlineSettings.Width = 3.0f;//边框宽度

UButton* button = WidgetTree->ConstructWidget<UButton>(UButton::StaticClass());

FButtonStyle MyButtonStyle;

MyButtonStyle.Normal = NormalBrush;

MyButtonStyle.Hovered = NormalBrush;

MyButtonStyle.Pressed = NormalBrush;

button->SetStyle(MyButtonStyle);