NowWebService class - iOS

The NowWebService class provides functions that enable the browsing of web pages on a ServiceNow instance.

Table 1. Properties

Name	Type	Description
configuration	NowServiceConfiguration	Configuration parameters to use when initializing the NowWebService instance.

NowWebService - init(configuration: NowServiceConfiguration, coreServiceProvider: NowCoreServiceProviding? = nil)

Initializes a NowWebService instance.

Table 2. Parameters

Name	Type	Description
configuration	NowServiceConfiguration	Configuration parameters to use when initializing the NowWebService instance.
coreServiceProvider	NowCoreServiceProviding	Optional. Service provider to associate with the NowWebService instance. Default: nil

The following code example shows how to call this method.

guard let coreService = NowSDK.core() else {
  // Error with NowServiceError.sdkNotConfigured
  return
}
guard 
  let instanceUrl = URL(string: "http://sample.service-now.com") , 
  let serviceConfig = NowSDK.makeServiceConfiguration(for: instanceUrl) else {
    // Could not create service – 
    // NowServiceError.serviceConfigurationInvalid
    return
}

let webService = NowWebService(configuration: serviceConfig, coreServiceProvider: coreService)

NowWebService - makeWebViewController(for url: URL, delegate: NowWebViewControllerDelegate, theme: NowWebThemeable)

Creates a UIViewController object that hosts the web view.

Table 3. Parameters

Name	Type	Description
for url	URL	URL of the web page to load. This web page must be on the target ServiceNow instance that the service was initialized with.
delegate	NowWebViewControllerDelegate	Optional. Object that receives callback events from the WebViewController into the native application.
theme	NowWebThemeable	Optional. NowUIThemeable protocol to apply to the UI elements of the view controller, such as color. Default: NowWebDefaultTheme(nowUITheme: NowUIDefaultTheme())

Table 4. Returns

Type	Description
Result<NowWebViewController, NowWebServiceError>	Success: NowWebViewController object Failure: NowWebServiceError object

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

NowWebService - preloadWebCache(urls: [URL], completion: PreloadWebCacheCompletion? = nil) throws

Preloads a list of specified pages with cacheable resources in the background (by NowWeb) to improve initial load times.

Table 5. Parameters

Name	Type	Description
urls	Array of URL objects	URLs of the pages to preload.
completion	PreloadWebCacheCompletion	Optional. Closure to inform the caller that the web pages have completed loading.

Table 6. Returns

Type	Description
None

The following example shows how to use the webService.preloadWebCache() function to pre-load specified pages.

private func preloadURLs(urls: [URL]) {
  guard let webService = webService else {
    debugPrint("Web service not initialized")
    return
  }
  do {
       try webService.preloadWebCache(urls: urls) {
         debugPrint("URLs did complete preloading")
       }
            
  } catch {
      debugPrint(error.localizedDescription)
  }
}