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在iOS 11中忽略设置UINavigationBar外观

uinavigationbar uinavigationcontroller swift ios

Chris Byatt · 技术社区 · 6 年前

我正在尝试设置UINavigationBar外观( tintColor , barTintColor 等等),但目前在iOS 11中,这一点似乎被完全忽视或表现不符合预期。当按下或弹出视图时,单个导航控制器内的条形图外观会发生变化。我有两个函数,我调用它们 viewWillAppear .

我需要能够设置标题颜色、左右栏按钮项目颜色、后退按钮颜色和栏色调。

我正在努力让颜色在此刻发挥作用,所以我尝试了这个,但没有乐趣。

public func setDarkHeaderStyle() {
    UIApplication.shared.statusBarStyle = .lightContent

    UINavigationBar.appearance().tintColor = UIColor.white
    UINavigationBar.appearance().barTintColor = Colours.secondaryNavy
    UINavigationBar.appearance().isTranslucent = false
}

public func setLightHeaderStyle() {
    UIApplication.shared.statusBarStyle = .default

    UINavigationBar.appearance().tintColor = Colours.primaryNavy
    UINavigationBar.appearance().barTintColor = UIColor.white
    UINavigationBar.appearance().isTranslucent = false
}

如果我改为使用导航控制器来设置颜色,它确实适用于条色调 UIBarButtonItem 和后退按钮,但标题不正确。

public func setDarkHeaderStyle() {
    UIApplication.shared.statusBarStyle = .lightContent

    navigationController?.navigationBar.tintColor = UIColor.white
    navigationController?.navigationBar.barTintColor = Colours.secondaryNavy
    navigationController?.navigationBar.isTranslucent = false
}

public func setLightHeaderStyle() {
    UIApplication.shared.statusBarStyle = .default

    navigationController?.navigationBar.tintColor = Colours.primaryNavy
    navigationController?.navigationBar.barTintColor = UIColor.white
    navigationController?.navigationBar.isTranslucent = false
}

因此,我手动设置标题文本属性,如下所示:

public func setDarkHeaderStyle() {
    UIApplication.shared.statusBarStyle = .lightContent

    navigationController?.navigationBar.titleTextAttributes = [
        NSAttributedStringKey.font: UIFont(name: Fonts.fontRegularName, size: 16)!,
        NSAttributedStringKey.kern: 0.2,
        NSAttributedStringKey.foregroundColor: UIColor.white
    ]

    navigationController?.navigationBar.tintColor = UIColor.white
    navigationController?.navigationBar.barTintColor = Colours.secondaryNavy
    navigationController?.navigationBar.isTranslucent = false
}

public func setLightHeaderStyle() {
    UIApplication.shared.statusBarStyle = .default

    navigationController?.navigationBar.titleTextAttributes = [
        NSAttributedStringKey.font: UIFont(name: Fonts.fontRegularName, size: 16)!,
        NSAttributedStringKey.kern: 0.2,
        NSAttributedStringKey.foregroundColor: Colours.primaryNavy
    ]

    navigationController?.navigationBar.tintColor = Colours.primaryNavy
    navigationController?.navigationBar.barTintColor = UIColor.white
    navigationController?.navigationBar.isTranslucent = false
}

这似乎奏效了, 除了返回根视图时,标题颜色未设置:

我想我有两个问题:

为什么不 UINavigationBar.appearance() 工作如何使其可靠工作?

2 回复 | 直到 6 年前

Lukas 6 年前

我认为这是一个错误。 UIBarNavigationItem 出于某种原因,似乎忽略了标题属性和色调的更改,除非标题的文本发生更改。这是一种奇怪的行为,你可以考虑报告它。一种解决方法是将空白后缀切换到标题:

// Hack!!! adds and removes an empty space to the title to 
// force the bar item reset title attributes.
let title: String = barItem.title ?? ""
barItem.title = title.hasSuffix(" ") ? String(title.dropLast()) : title + " "

Medhi 3 年前

我尝试在我的UIViewController(全局和当前导航栏外观)上工作:

        UINavigationBarAppearance* appearance = [[UINavigationBarAppearance alloc] init];
        appearance.backgroundColor = bgColor;
        appearance.titleTextAttributes = @{NSForegroundColorAttributeName : [UIColor whiteColor]};

        [UINavigationBar appearance].standardAppearance = appearance;
        [UINavigationBar appearance].scrollEdgeAppearance = appearance;
        self.navigationController.navigationBar.standardAppearance = appearance;
        self.navigationController.navigationBar.scrollEdgeAppearance = appearance;