可以示例化UIImage.SymbolConfiguration。例如，可以指定点大小：

let configuration = UIImage.SymbolConfiguration(pointSize: 24)
let image = UIImage(systemName: "location.fill", withConfiguration: configuration)

或UIFont.TextStyle：

let configuration = UIImage.SymbolConfiguration(textStyle: .title1)
let image = UIImage(systemName: "location.fill", withConfiguration: configuration)

使用后一种方法，它将荣誉设备上的辅助功能文本大小设置。

下面的代码提供了两个方法：

1. UIKit建议的方法（参见developer.apple.com/documentation）。在这里，您将SF符号图像视为字体，并对其应用点大小。
   1.一种SwiftUI方式。按钮（以及示例中的一些关联文本）缩放到提供的框架。

import UIKit
    import SwiftUI

    class SwiftUIButton : ObservableObject {

          @Published var state : Bool = true { didSet { buttonDidChange(state) } }

          private lazy var viewController = UIHostingController(rootView: SwiftCustomButton(delegate: self))
          var view : UIView { guard let view = viewController.view else {
                preconditionFailure("*Fatal Error* Could not create SwiftUI button") }
                return view
          }

          typealias typeForAction = () -> Void
          var action : typeForAction?

          func buttonDidChange(_ state : Bool) {
                guard let action = action else {
                      return
                }
                action()
          }
    }

    struct SwiftCustomButton : View {

          @ObservedObject var delegate : SwiftUIButton

          var body : some View {
                VStack() {
                      Button(action: {
                            self.delegate.state = !self.delegate.state
                      }) { Image(systemName: "gear")
                            .resizable()
                            .aspectRatio(contentMode: .fit)
                      }

                      Text(delegate.state ? "Hello" : "Goodbye")
                }
          }
    }

    class ViewController: UIViewController {

          override func viewDidLoad() {
                super.viewDidLoad()

                let button = SwiftUIButton()
                button.action = { print("In the ViewController the button has changed to: \(button.state)")}
                button.view.frame = CGRect(x: 200, y: 200, width: 80, height: 80)
                view.addSubview(button.view)

                let image = UIImage(systemName: "gear")
                let symbolConfiguration = UIImage.SymbolConfiguration(pointSize: 64.0)

                let adjustedImage = image?.applyingSymbolConfiguration(symbolConfiguration)

                let uButton = UIButton(type: .custom)
                uButton.setImage(adjustedImage , for: .normal)
                uButton.frame = CGRect(x: 20, y: 200, width: 80, height: 80)
                uButton.target(forAction: #selector(self.buttonAction), withSender: uButton)
                view.addSubview(uButton)

                self.view = view
          }

          @objc func buttonAction() {
                print("UIButton pressed")
          }
    }

Rob的回答很棒，你可以和督察谈谈