Swiftui 动态文本字体快捷界面

我试图将文本字段的第一段改为粗体和更大

我能够获取文本字段的第一段并将其命名为title

但是使用.scaledFont会使我的所有文本字段变大，而不仅仅是标题。我正在努力克服这个问题

VStack{
            TextEditor(text: $text)
                .scaledFont(name: title, size: 40)
                .onTapGesture {
                    isEditing = true
                }
                .onChange(of: text, perform: { value in
                    if let firstParagraph = value.components(separatedBy: CharacterSet.newlines).first {
                        title = firstParagraph
                        print("TITLE--\(title))
                    }
                })
        }

缩放字体

    struct ScaledFont: ViewModifier {
    @Environment(\.sizeCategory) var sizeCategory
    var name: String
    var size: CGFloat

    func body(content: Content) -> some View {
       let scaledSize = UIFontMetrics.default.scaledValue(for: size)
        return content.font(.custom(name, size: scaledSize))
    }
}

@available(iOS 13, macCatalyst 13, tvOS 13, watchOS 6, *)
extension View {
    func scaledFont(name: String, size: CGFloat) -> some View {
        return self.modifier(ScaledFont(name: name, size: size))
    }
}