如何在 Swift 中为 leftBarButtonItem 和 rightBarButtonItem 设置不同的色调

Question

我尝试了很多解决方案，但没有按预期工作

根据我在每个 viewcontoller viewWillDisappear 中的应用程序结构，我们必须像下面的代码一样恢复导航栏

let textAttributes = [NSAttributedString.Key.foregroundColor: UIColor.black]
        navigationController?.navigationBar.tintColor = .blue
        navigationController?.navigationBar.backgroundColor = .white
        navigationController?.navigationBar.isTranslucent = false

        // Restore the navigation bar to default from transparent
        if #available(iOS 15, *) {
            let appearance = UINavigationBarAppearance()
            appearance.configureWithDefaultBackground()
            appearance.backgroundColor = .white 
            appearance.titleTextAttributes = textAttributes

            // Customizing our navigation bar
            navigationItem.standardAppearance = appearance
            navigationItem.scrollEdgeAppearance = appearance
        } else {
            navigationController?.navigationBar.titleTextAttributes = textAttributes
            navigationController?.navigationBar.setBackgroundImage(nil, for: .default)
            navigationController?.navigationBar.shadowImage = nil
        }

在其他视图控制器中，我需要添加具有不同颜色的leftBarButtonItem和rightBarButtonItem ，但只有当我更改以上代码navigationBar.tinitColor时，它总是变为蓝色，我可以看到 navigationItem barbutton 中的颜色变化，但两者都是相同的颜色，这是我给出的导航栏.tinitColor

这是 rightBarButtonItem 色调颜色更改代码

let barButtonItem = UIBarButtonItem(title: "", style: .plain, target: self, action: nil)
        barButtonItem.tintColor = .black
        barButtonItem.accessibilityIdentifier = "navbar_notificationbutton"
        navigationItem.rightBarButtonItem = barButtonItem

实际结果截图

预期结果截图

提前致谢！！！

Answer 1

要为导航栏按钮更改或应用不同的色调颜色，您可以使用以下代码

    let backButton = UIButton(frame: CGRect(x: 0.0, y: 0.0, width: 44.0, height: 44.0))
    backButton.setImage(UIImage(systemName: "chevron.backward"), for: .normal)
    backButton.addTarget(self, action: #selector(btnBack), for: .touchUpInside)
    backButton.tintColor = .red
    self.navigationItem.leftBarButtonItem = UIBarButtonItem(customView: backButton)
    
    let notificationButton = UIButton(frame: CGRect(x: 0.0, y: 0.0, width: 44.0, height: 44.0))
    notificationButton.setImage(UIImage(systemName: "bell"), for: .normal)
    notificationButton.addTarget(self, action: #selector(btnShowNotifications), for: .touchUpInside)
    notificationButton.tintColor = .systemGreen
    self.navigationItem.rightBarButtonItem = UIBarButtonItem(customView: notificationButton)

在上面的代码中，我创建了一个back按钮并将其分配给leftBarButtonItem ，同样，我创建了另一个具有不同色调颜色的按钮并将其分配给rightBarButtonItem 。