一尘不染

向其中添加UISearchController时导航栏变为白色

swift

当我从UINavigationController向UINavigationItem添加UISearchController时;当视图加载时,该图标变为白色;当用户单击搜索栏时,该图标变为指定的颜色。自iOS
13.1起发生这种情况。该视频显示了该行为:

我的代码包含一个简单的情节提要,其中包含一个NavigationController+一个TableViewController,并且NavigationController为其分配了一种颜色:

ViewController由以下代码组成:

class ViewController: UITableViewController {

    let searchController = UISearchController(searchResultsController: nil)

    override func viewDidLoad() {
        super.viewDidLoad()

        searchController.hidesNavigationBarDuringPresentation = false
        searchController.obscuresBackgroundDuringPresentation = false
        navigationItem.searchController = searchController
    }
}

我还将这些键添加到info.plist文件中,以强制应用程序进入灯光模式,但如果删除这些键,则仍然存在相同的行为:

<key>UIUserInterfaceStyle</key>
<string>Light</string>

这已在运行iOS 13.1 beta 1的iPhone XS Max上进行了测试。这是预期的行为还是需要修复的错误?


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2020-07-07

共1个答案

一尘不染

看来需要在iOS 13上使用新的UINavigationBarAppearance。尝试将其添加到您的viewDidLoad中:

let appearance = UINavigationBarAppearance()
appearance.backgroundColor = .systemRed
appearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor : UIColor.white]
navigationItem.standardAppearance = appearance
navigationItem.scrollEdgeAppearance = appearance

您可能还需要设置searchField backgroundColor:

let searchField = searchController.searchBar.searchTextField
searchField.backgroundColor = .systemBackground
2020-07-07