ios - backBarButtonItem 显示图像不正确

Question

我正在为 backBarButtonItem 使用带有图像的自定义 UIBarButtonItem。我发现了奇怪的行为，因为除了我的图像之外，还显示了默认的箭头图标。

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        navigationItem.backBarButtonItem = UIBarButtonItem(image: #imageLiteral(resourceName: "BackButtonIcon"), style: .plain, target: nil, action: nil)
    }

    @IBAction private func push(_ button: UIButton) {
        let secondViewController = SecondViewController()
        navigationController?.pushViewController(secondViewController, animated: true)
    }

}

class SecondViewController: UIViewController {


    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .white
    }

}

结果是

Answer 1

尝试使用:

navigationBar.backIndicatorImage = #imageLiteral(resourceName: "BackButtonIcon")

navigationController?.navigationBar.backIndicatorTransitionMaskImage = #imageLiteral(resourceName: "BackButtonIcon")

navigationItem.backBarButtonItem = UIBarButtonItem(title: "Title", style: UIBarButtonItemStyle.plain, target: nil, action: nil)

导航栏有一个背景图像属性以及一个 UINavigationItem 的 backItem 属性。您可以阅读更多here .

编辑:

在源 View Controller 而不是目标 Controller 中使用此代码。