Protocolo NowWebThemeable - iOS

O protocolo NowWebThemeable fornece propriedades que permitem substituir as cores usadas nas páginas da Web hospedadas em sua instância ServiceNow em uma exibição nativa da Web.

Este protocolo contém um objeto de cor NowWebColoring que estende ColorAdaptable. ColorAdaptable é usado para determinar automaticamente se as cores claras ou escuras devem ser exibidas com base na configuração de exibição do dispositivo.

public protocol NowWebThemeable {
    var color: NowWebColoring { get }
}

O protocolo NowWebColoring contém NowUIColoring. Esta propriedade é usada para fazer referência a variáveis de cor padrão que o NowWebThemeable pode usar.

Para obter informações adicionais sobre como criar um tema para a IU, consulte Use NowUIColoring para o tema NowWebTheme e NowChatTheme no Guia do desenvolvedor do Mobile SDK - iOS.

Definir WebColors usando cores padrão

/// Sample structure for using default colors that come with Mobile SDK.
struct WebColors: NowUIColoring {
}

Definir WebColors usando cores personalizadas

/// Use custom colors with light and dark themes
struct WebColors: NowUIColoring {
    private var defaultTheme: NowWebDefaultTheme { NowWebDefaultTheme(nowUITheme: NowUIDefaultTheme())
    }
    
    var brand: UIColor { adaptiveColor(lightBrand, darkBrand) }
    var primary: UIColor { adaptiveColor(lightPrimary, darkPrimary) }
    var textPrimary: UIColor { adaptiveColor(lightTextPrimary, darkTextPrimary) }
    var screenHeaderText: UIColor { adaptiveColor(lightScreenHeaderText, darkScreenHeaderText) }
    var screenHeaderBackground: UIColor { adaptiveColor(lightScreenHeaderBackground, darkScreenHeaderBackground) }
    var textActionable: UIColor { adaptiveColor(lightTextActionable, darkTextActionable) }
    var alertCritical0: UIColor { adaptiveColor(lightAlertCritical0, darkAlertCritical0) }
    var alertCritical3: UIColor { adaptiveColor(lightAlertCritical3, darkAlertCritical3) }
    var alertPositive0: UIColor { adaptiveColor(lightAlertPositive0, darkAlertPositive0) }
    var alertPositive3: UIColor { adaptiveColor(lightAlertPositive3, darkAlertPositive3) }
    var alertLow0: UIColor { adaptiveColor(lightAlertLow0, darkAlertLow0) }
    var alertWarning0: UIColor { adaptiveColor(lightAlertWarning0, darkAlertWarning0) }
    var backgroundPrimary: UIColor { adaptiveColor(lightBackgroundPrimary, darkBackgroundPrimary) }
    
    // Light Colors
    var lightBrand: UIColor { defaultTheme.color.brand }
    var lightPrimary: UIColor { defaultTheme.color.primary }
    var lightTextPrimary: UIColor { defaultTheme.color.textPrimary }
    var lightScreenHeaderText: UIColor { defaultTheme.color.screenHeaderText }
    var lightScreenHeaderBackground: UIColor { defaultTheme.color.screenHeaderBackground }
    var lightTextActionable: UIColor { defaultTheme.color.textActionble }
    var lightAlertCritical0: UIColor { defaultTheme.color.alertCritical0 }
    var lightAlertCritical3: UIColor { defaultTheme.color.alertCritical3 }
    var lightAlertPositive0: UIColor { defaultTheme.color.alertPositive0 }
    var lightAlertPositive3: UIColor { defaultTheme.color.alertPositive3 }
    var lightAlertLow0: UIColor { defaultTheme.color.alertLow0 }
    var lightAlertWarning0: UIColor { defaultTheme.color.alertWarning0 }
    var lightBackgroundPrimary: UIColor { defaultTheme.color.backgroundPrimary }
    
    // Dark Colors
    var darkBrand: UIColor { defaultTheme.color.brand }
    var darkPrimary = UIColor(hex: "#8486FF")
    var darkTextPrimary = UIColor(hex: "#FFFFFF")
    var darkScreenHeaderText = UIColor(hex: "#FFFFFF")
    var darkScreenHeaderBackground = UIColor(hex: "#CADFC0")
    var darkTextActionable = UIColor(hex: "#07080B")
    var darkAlertCritical0 = UIColor(hex: "#7B1E28")
    var darkAlertCritical3 = UIColor(hex: "#E46876")
    var darkAlertPositive0 = UIColor(hex: "#CADFC0")
    var darkAlertPositive3 = UIColor(hex: "#3B7F00")
    var darkAlertLow0 = UIColor(hex: "#DBDBDE")
    var darkAlertWarning0 = UIColor(hex: "#FBF7BF")
    var darkBackgroundPrimary = UIColor(hex: "#FFFFFF")
}

Definir a estrutura do WebTheme com o protocolo NowWebThemeable

struct CarrascoWebTheme: NowWebThemeable {
    var color: NowWebColoring
    
    struct Color: NowWebColoring {
        var nowUIColor: NowUIColoring
    
        var alertPositive0: UIColor
        var alertPositive3: UIColor
        var alertLow0: UIColor
        var alertWarning0: UIColor
        var backgroundPrimary: UIColor
        
        init(inputs: WebColors) {
            nowUIColor = ThemeColor(inputs)
            
            alertPositive0 = inputs.alertPositive0
            alertPositive3 = inputs.alertPositive3
            alertLow0 = inputs.alertLow0
            alertWarning0 = inputs.alertWarning0
            backgroundPrimary = inputs.backgroundPrimary
        }
    }
    
    public init(webColors: WebColors) {
        color = Color(inputs: webColors)
    }
}

Instanciar um objeto WebTheme passando WebColor como entrada

let webTheme = CarrascoWebTheme(webColors: WebColors())

Passar um objeto WebTheme para NowWebService.fazerWebViewController

func webViewController(for url: URL, delegate: NowWebViewControllerDelegate) -> NowWebViewController? {
  guard let webService = webService else {
    debugPrint("Web service not initialized")
    return nil
  }
  let result = webService.makeWebViewController(for: url, delegate: delegate, theme: CarrascoWebTheme(webColors: WebColors()) )
    
  switch result {
  case .success(let viewController):
    return viewController
  case .failure(let error):
    debugPrint("Web view creation failed with error: \(error.localizedDescription)")
  }
  return nil
}