View source for DCR Thailand Video iOS SDK

{{Breadcrumb|}} {{Breadcrumb|Digital}} {{Breadcrumb|International_DCR}} {{CurrentBreadcrumb}}
[[Category:Digital]]

== Overview ==
The Nielsen SDK is one of multiple framework SDKs that Nielsen provides to enable measuring linear (live) and on-demand TV viewing using TVs, mobile devices, etc.
The App SDK is the framework for mobile application developers to integrate Nielsen Measurement into their media player applications. Nielsen SDKs are also equipped to measure static content and can track key life cycle events of an application like:
*Application launch events and how long app was running
*Time of viewing a sub section / page in the application.

This guide covers implementation steps for iOS using Xcode utilizing the Standard Nielsen SDK for DCR.

{{iOS_SpecialNotes_for_iOS14}}

== Prerequisites ==
Before you start the integration, you will need:
{| class="wikitable"
|-
! style="width: 15%;" | Item
! Description
! Source
|-style="background-color:#d0f6f8;"
 || '''App ID (appid)''' || Unique ID assigned to the player/site and configured by product. || Provided by Nielsen
|-style="background-color:#d0f6f8;"
 || '''Nielsen SDK''' || Includes SDK frameworks and '''sample implementation'''; ''See [[iOS SDK Release Notes]]'' || [[Special:Downloads|Download]]
|}

If need App ID(s) or our SDKs, feel free to reach out to us and we will be happy to help you get started.
Refer to [[Digital Measurement Onboarding]] guide for information on how to get a Nielsen App SDK and appid.

==  Implementation ==
Version 8 of the Nielsen App SDK will come in three versions. One that is enabled to work with the App Tracking Transparency Framework, another version that does not use the Ad Framework, and a version for Kids Apps or where noID is required. 

{| class="wikitable" 
|-
! SDK Flavor
! Description
|-
| '''iOS Ad Version'''
|* Opt-In and Opt-Out functionality managed by the [https://developer.apple.com/documentation/apptrackingtransparency AppTrackingTransparency framework] . '''(Preferred approach)''' <br />* The Nielsen SDK will attempt to collect the IDFA (Id for Advertisers) on the device.<br> * For iOS14+, if the value returned is <code>ATTrackingManager.AuthorizationStatus.authorized</code>.<br>*  If the device is running iOS12 or iOS13, the Limit Ad Tracking setting is requested.
|-
| '''iOS No Ad Framework'''
|* Without the Ad Framework, the Nielsen SDK cannot read the IDFA, so it will attempt to retrieve the '''IDFV'''.<br />* The [https://developer.apple.com/documentation/uikit/uidevice/1620059-identifierforvendor ID for Vendors (IDFV)], may be used for analytics across apps from the same content provider.<br />* The developer is required to present the User Choice Opt Out page which is described in the [[DCR_Thailand_Video_iOS_SDK#Global_iOS_SDK_No_Ad_Framework_Optout|Privacy Section]].
|-
| '''iOS SDK noID'''
|* This version of the Nielsen SDK is perfect for Kid apps, or where no ID is required.<br>* Please review the [[DCR_Thailand_Video_iOS_SDK#Global_iOS_SDK_No_ID_Optout_.28Kids_Category.29|Opt Out Requirement]].
|}
=== How to obtain the NielsenAppApi.Framework ===
The Nielsen AppSDK can either be downloaded directly or can be integrated directly within an application through the use of CocoaPods. We recommend using the CocoaPods-based integration whenever possible to ensure you maintain the most recent changes and enhancements to the Nielsen libraries.
* [[Digital_Measurement_iOS_Artifactory_Guide|Select to obtain CocoaPods implementation guide]]
* [[Special:Downloads|Select to Download Directly]]
* [[DCR_Video_iOS_SDK_xcframework|Using the XCFramework bundle]]

__TOC__

== Setting up your  Development Environment  ==
Prior to SDK Version 6.2.0.0 the  IOS framework has been distributed as a static library packaged into framework bundle format. Apple recommends to use dynamic framework, it has some benefits over static libraries like less executable file size of an app, faster startup time and native support in xCode IDE. Nielsen AppSDK has been transformed into dynamic framework in this release ([[iOS_Static_Framework_Setup|static framework]] is still available).

If migrating from the static library to this new dynamic framework, once implemented, unless your specific application requires, you can remove the following Frameworks that were once required:<code> [AdSupport, JavascriptCore, SystemConfiguration, Security, AVFoundation, libc++] </code>
<br>

The '''Dynamic framework''' is created as a fat framework. It means that it contains slices required for devices (armv7, arm64) as well as slices required for simulators (i386, x86_64). Simulator slices are needed to let clients build and debug their app on the simulators, but they should be removed before sending the app to the AppStore. The example of the shell script that should be added as a Run Script phase in the application can be [[DCR_Thailand_Video_iOS_SDK#Removing_Simulators_.28Dynamic_Framework_Only.29|found below]].

'''[[DCR_Video_iOS_SDK_xcframework|XCFramework]]''' is solution for the problems described above Apple recommends to use XCFrameworks. In XCFramework, we no longer build a single framework with multiple architectures. Instead, we build one small framework for each combination of architecture and target and store it in its own folder. The top-level XCFramework folder have folders like ios-arm64, ios-arm64-simulator, etc. Each of these folders is its own framework, complete with headers, modules, and binary.

=== Configuring Xcode Development Environment ===
Starting with SDK version 6.0.0.0, the Nielsen App SDK is compatible with Apple iOS versions 8.0 and above.  In addition, when using the dynamic framework,  all the required frameworks are linked automatically as the are needed.  More details can be found here: https://stackoverflow.com/questions/24902787/dont-we-need-to-link-framework-to-xcode-project-anymore

<blockquote>'''Note''': All communications between the SDK and the Census (Collection Facility) use HTTPS.</blockquote>

=== Download Framework ===
The first step is to download and copy the [[Special:Downloads|NielsenAppApi.framework]] bundle to the app project directory. (''Not required if using CocaPods'')

=== Add Framework ===
In the General tab for app configuration add NielsenAppApi.framework in the list of Embedded Binaries.  (''Not required if using CocaPods'')

=== Add Path ===
Add path to the NielsenAppApi.framework in the Framework Search Paths build setting.  (''Not required if using CocaPods'')

=== Import Framework ===
Add NielsenAppApi.framework module in the source file of your app:

==== Using Swift ====
Add the following:
<syntaxhighlight lang="swift">
import NielsenAppApi
</syntaxhighlight>

==== Using Objective-C ====
<syntaxhighlight lang ="objective-c">
@import NielsenAppApi;
</syntaxhighlight>

{{iOS_SDK_Initialization}}

== Configure Metadata ==
All the SDK methods handles only two types of objects: NSString, NSDictionary. The parameters passed must be either a JSON formatted string or a NSDictionary object. The JSON passed in the SDK must be well-formed.
* NSDictionary object
** If an object of unexpected type is passed to the method, the error message will be logged.
** If string has invalid JSON format, the error message will be logged.
* JSON value must be string value.
** This includes boolean and numeric values. For example, a value of true should be represented with "true", number value 123 should be "123".
** All the Nielsen Key names (e.g. appid, program) are case-sensitive. Use the correct variable name as specified in the documentation.
* JSON string can be prepared using either raw NSString or serialized NSDictionary.
<br>
=== Create channelName Metadata ===
channelName should remain constant throughout the completion of an episode or live stream.
<br />
{| class="wikitable"
|-
! Key !! Description !!	Values	 !! Required
|-
| channelName	|| Any string representing the channel/stream	|| custom	|| ✓
|-
|}
=== Create Content Metadata ===
Content metadata should remain constant throughout the entirety of an episode/clip including when ads play.
<blockquote> program and title metadata values should be passed to SDK as UTF-8 strings. </blockquote>
{| class="wikitable"
|-
! Key !! Description !!	Values	 !! Required
|-
| clientid	|| 
parent ID – value is automatically populated through provided App ID.<br/>
In order to override the brand configured to the App ID, pass parent <br/>
value here and the sub-brand ID associated to that brand in the subbrand <br/>
key (e.g. multiple brands in App)	
||
Nielsen provided	
||
|-
| subbrand	|| sub-brand ID – value is automatically populated through provided<br/>
App ID. In order to override the sub-brand configured to the App ID, value can <br/>
be passed here (e.g. multiple sub-brands in App)
||
Nielsen provided	
||
|-
| type ||	type of asset	|| "content"	|| ✓
|-
| assetid	|| unique ID assigned to asset 	|| custom<br>(no [[Special Characters]]). The Content ID should be populated here which should correspond to the same value in the post transmission logs. || ✓
|-
| program	|| name of program 	|| custom	|| ✓
|-
| title	|| episode name	|| custom	|| ✓
|-
| length	|| length of content in seconds	|| seconds (86400 for live stream)||	✓
|-
| segB	|| custom segment B. Custom segments can be used to aggregate content however you choose. Some examples include genre, category, or platform.	|| custom	||
|-
| segC	|| For VOD: Populate TVContent ID, For livestream: leave blank	|| custom	 || Required for VOD only
|-
|-
| isfullepisode	|| full episode flag ||	
*'y', 'yes', or 'lf' – full episode
*'n', 'no', or 'sf' – non full episode	
'''Note:''' For livestream content with Dynamic Ad Insertion (DAI), the isfullepisode value should be set to 'y'. 
||
✓
|-
|adloadtype	|| type of Ad load:
* 1) Linear – matches TV Ad load. Content with linear Ad Load is not eligible for DCR measurement and will not be included in DCR reporting.
* 2) Dynamic – Dynamic Ad Insertion (DAI)
||
*"1" – content with linear Ads. Note: Content with linear Ad load is not included in DCR measurement. 
*"2" – content with dynamic Ads	
||
✓
|-
|}

==== Metadata Example ====
<code>Swift</code>
<syntaxhighlight lang="swift">

let contentMetadata = [
    "type": "content",
    "assetid": "C77664",
    "title": "Program S2, E3",
    "isfullepisode": "y",
    "program": "Program Name",
    "length": "3600",
    "adloadtype": "2",
    "segB": "CustomSegmentValueB", //optional
    "segC": "CustomSegmentValueC", //optional
];
</syntaxhighlight> 
<br>
<code>Objective-C</code>    
<syntaxhighlight lang="objective-c"> 
NSDictionary * contentMetadata = @ {
    @ "type": @ "content",
    @ "assetid": @ "C77664",
    @ "title": @ "S2,E3",
    @ "isfullepisode": @ "y",  
    @ "program": @ "Program Name",
    @ "length": @ "3600",
    @ "adloadtype": @ "2",
    @ "segB": @ "CustomSegmentValueB", //optional
    @ "segC": @ "CustomSegmentValueC", //optional
}
</syntaxhighlight>
<!--
=== Configure metadata === 
channelName should remain constant throughout the completion of an episode or live stream.
{| class="wikitable"
|-
! Key !! Description !!	Values	 !! Required
|-
| channelName	|| ChannelInfo refers to the Channel name. This can be a free-form value
value such as a friendly name for the content being played. the SDK<br/>
will pass the application name automatically.
|| custom	|| No
|-
|}
-->

=== Ad Metadata ===
The Ad Metadata (if applicable) should be passed for each individual ad.
{| class="wikitable"
|-
! Keys	!! Description	!! Values	!! Required
|-
| type 	|| type of Ad	||  <code>'preroll'</code>,  <code>'midroll'</code>,  <code>'postroll'</code> <br> <code>'ad'</code>  - If specific type can not be identified.||	✓
|-
| assetid ||	unique ID assigned to Ad	|| custom <br>(no [[Special Characters]])	|| ✓
|}

==== Example Ad Object ====
<syntaxhighlight lang="javascript">
// create Ad object
"ad": {
  "type": "preroll",
  "assetid": "AD-ID123"
}
</syntaxhighlight>

{{iOS_LifeCycle_of_SDK}}

== Configure API Calls ==
<!--[[File:appsdkTimeline-DCR.png|icon|link=]]-->
=== Sample API Sequence ===
A Sample API sequence could follow this flow:
{| class="wikitable"
|-
! Type !! Sample code !! Description
|-
| rowspan="2" | Start of stream || <code>nielsenMeter.play()</code> || // Call at start of each new stream
|-
| <code>nielsenMeter.loadMetadata(contentMetadata)</code> || // MetadataObject contains the JSON metadata<br> for the content being played
|-
| Content || <code>nielsenMeter.playheadPosition(pos);</code> || // playheadPosition is position of the playhead <br>while the content is being played
|-
| End of Stream || <code>nielsenMeter.end()</code> || // Content playback is completed.
|}

=== SDK Events ===
{| class="wikitable"
|-
! Event !!	Parameter	!! Description
|-
| 'play'	|| 	|| Call at start of each new stream
|-
| 'loadMetadata'	|| content/ad metadata object	|| Needs to be called at the beginning of each asset
|-
| 'playheadPosition'	|| playhead position as integer<br/>
VOD: current position in seconds <br/>
Live: current UNIX timestamp (seconds since Jan-1-1970 UTC) <br/>
Note: 'PlayheadPosition' has to be called every second
||
Pass playhead position every second during playback
|-
| 'stop' ||	playhead position	|| Call during any interruption to content or Ad playback and at the end of each Ad.
|-
| 'end'	|| playhead position in seconds	|| Call when the current video asset completes playback and pass the playhead position. <br/>
Example: At the end of the content stream, if the user switches to another piece of content, when the browser is refreshed or closed.
|}
<blockquote>Note: For livestream, send the UNIX timestamp, for VOD send the time in seconds as integer. The final playhead position must be sent for the current asset being played before calling <code>'''stop'''</code>, <code>'''end'''</code> or<code> '''loadmetadata'''</code>,.</blockquote>

=== Life cycle of SDK instance ===
Life cycle of SDK instance includes four general states:
# '''Initial state''' – The SDK is not initialized and hence, not ready to process playing information. Once the SDK is moved out of this state, it needs instantiation of the new SDK instance in order to get the instance in the '''Idle state'''.
# '''Idle state''' – The SDK is initialized and is ready to process playing information. Once Initialized, the SDK instance is not processing any data, but is listening for an event to occur.
# '''Processing state''' – The SDK instance is processing playing information. The <code>'''play'''</code> and <code>'''loadMetadata''' </code> calls move the SDK instance into this state. In this state, the SDK instance will be able to process the following calls.
## <code>'''playheadPosition'''</code> – Call this API every one second when playhead position is active.  If a LIVE event, use the current UNIX timestamp (seconds since Jan-1-1970 UTC).
## <code>'''stop'''</code> – Call this API when the content or Ad playback is interrupted and at the end of each Ad. 
## <code>'''end'''</code> – Call when content completes. When called, the SDK instance exits from Processing state.
# '''Disabled state''' – The SDK instance is disabled and is not processing playing information. 
## <code>'''appDisableApi'''</code> is set to <code>true</code>

<blockquote>'''Note:''' For API Version 5.1 and above, App SDK will fire data pings and continue measurement even after the user has opted out from Nielsen measurement on a device. The data ping will be marked as opted-out ping.

'''Note''': In case of any interruptions during playback due to alarm, calendar, call, flight mode, Wi-Fi toggle, channel change, etc., call [[stop]] to stop the measurement.
* As soon as the playback resumes, call <code>'''loadMetadata''' </code> and   <code>'''playheadPosition'''</code> </blockquote>

=== API Call Sequence ===
==== Use Case 1: Content has no Advertisements ====
Call [[play()]] at start of stream

Call [[loadMetadata()]] with JSON metadata for content as below.
<syntaxhighlight lang="json">{
  "type": "content",
  "assetid": "vid345-67483",
  "program": "ProgramName",
  "title": "Program S3, EP1",
  "length": "3600",
  ...
}</syntaxhighlight>
Call [[playheadPosition|playheadPosition()]] every one second until a pause / stop.
Use the sample API sequence below as a reference to identify the specific events that need to be called during content playback without ads.
{| class="wikitable"
|-
! Type !! Sample code !! Description
|-
| rowspan="2" | Start of stream || <code>mAppSdk.play(); </code> || // Call at start of each new stream
|-
| <code>mAppSdk.loadMetadata(contentMetaDataObject);</code> || // contentMetadataObject contains the JSON metadata for the content being played
|-style="background-color:#d8f5d7;"
| Content || <code>mAppSdk.setPlayheadPosition(playheadPosition);</code> || // position is position of the playhead while the content is being played
|-
| Interruption || <code>mAppSdk.stop();</code> || // call stop when content playback is interrupted
|-style="background-color:#d8f5d7;"
| rowspan="2" | Resume Content || <code>mAppSdk.loadMetadata(contentMetaDataObject);</code>  || // Call loadMetadata and pass content metadata object when content resumes
|- style="background-color:#d8f5d7;"
|<code>mAppSdk.setPlayheadPosition(playheadPosition);</code> || // continue pasing playhead position every second starting from position where content is resumed
|- 
| End of Stream || <code>mAppSdk.end();</code> || // Content playback is completed.
|}

==== Use Case 2: Content has Advertisements ====
Call [[play()]] at start of stream

Call [[loadMetadata()]] with JSON metadata for ad as below.
<syntaxhighlight lang="json">{
   "type": "preroll",
   "assetid": "ad123"
}</syntaxhighlight>
<blockquote>Note: In case the individual ad details are not available, send ad pod (presence) details through the [[loadMetadata]] and playhead position through [[playheadPosition]].</blockquote>

Call [[playheadPosition|playheadPosition()]] every one second until a pause / stop / another [[loadMetadata()]] is called. Playhead should be passed for the entire duration of ad pod, if the ad pod details are passed as part of [[loadMetadata()]].

The sample API sequence can be used as a reference to identify the specific events that need to be called during content and ad playback.
{| class="wikitable"
|-
! Type !! Sample code !! Description
|-
| rowspan="2" | Start of stream || <code>mAppSdk.play(); </code> || // stream starts
|-
| <code>mAppSdk.loadMetadata(contentMetaDataObject);</code> || // contentMetadataObject contains the JSON metadata for the content being played
|-
| rowspan="3" | Preroll || <code>mAppSdk.loadMetadata(prerollMetadataObject);</code> || // prerollMetadataObject contains the JSON metadata for the preroll ad
|-
| <code>mAppSdk.playheadPosition(playheadPosition);</code> || // position is position of the playhead while the preroll ad is being played
|-
| <code>mAppSdk.stop();</code> || // Call stop after preroll occurs
|-
| rowspan="2" | Content || <code>mAppSdk.loadMetadata(contentMetaDataObject);</code> || // contentMetadataObject contains the JSON metadata for the content being played
|-
| <code>mAppSdk.playheadPosition(playheadPosition);</code> || // position is position of the playhead while the content is being played
|-
| rowspan="3" | Midroll || <code>mAppSdk.loadMetadata(midrollMetaDataObject);</code> || // midrollMetadataObject contains the JSON metadata for the midroll ad
|-
| <code>mAppSdk.playheadPosition(playheadPosition);</code> || // position is position of the playhead while the midroll ad is being played
|-
| <code>mAppSdk.stop();</code> || // Call stop after midroll occurs
|-
| rowspan="2" | Content Resumes || <code>mAppSdk.loadMetadata(contentMetaDataObject);</code> || // contentMetadataObject contains the JSON metadata for the content being played
|-
| <code>mAppSdk.playheadPosition(playheadPosition);</code> || // position is position of the playhead while the content is being played
|-
| End of Stream || <code>mAppSdk.end();</code> || // Call end() at the end of content
|-
| rowspan="3" | Postroll || <code>mAppSdk.loadMetadata(postrollMetaDataObject);</code> || // postrollMetadataObject contains the JSON metadata for the postroll ad
|-
| <code>mAppSdk.playheadPosition(playheadPosition);</code> || // position is position of the playhead while the postroll ad is being played
|-
| <code>mAppSdk.stop();</code> || // Call stop after postroll occurs
|}

<blockquote>Note: Each Ad playhead should begin from 0 at ad start.  When content has resumed following an ad break, playhead position must continue from where previous content segment was left off.</blockquote>

{{iOS_Sequence_of_Calls}}

{{iOS_Foreground_and_Background}}

{{iOS_Interuptions_during_Playback}}

{{iOS_NielsenAppSDKJSHandler}}

{{iOS_PreCertification_Checklists}}

== Privacy and Opt-Out ==

There are currently 3 flavors of the Nielsen SDK: 
# '''[[#Global_iOS_SDK_Opt-out|Global iOS SDK Opt-out]]''' - managed by ''AppTracking'' or ''Limit Ad Tracking'' setting on device ('''preferred approach''').
# '''[[#Global_iOS_SDK_No_Ad_Framework_Optout|Global iOS SDK No Ad Framework Optout]]''' - Direct call to SDK. Can be used without the Ad Framework
# '''[[#Global_iOS_SDK_No_ID_Optout_.28Kids_Category.29|Global iOS SDK No ID Optout]]''' - Direct call to SDK. Should be used for Kids Category.

=== Global iOS SDK Opt-out ===
''OS-level Opt-out'' method available on Nielsen iOS 

The Nielsen SDK automatically leverages the iOS's '''Limit Ad Tracking''' or '''AppTracking''' setting. 
*  If the User's device is running < iOS 13.x, the Nielsen SDK will check the status of '''Limit Ad Tracking'''.
*  iOS14 modifies the way Apple manages the collection of a User's Opt-In status through '''AppTracking'''. Starting with Version 8.x+, the Nielsen App SDK will check the iOS version during initialization. If the device is running iOS12 or iOS13, the Limit Ad Tracking setting is requested. If iOS14.x +, then AppTracking is utilized.
==== Webview Element ====
It is a requirement to display a WebView element whose loadUrl is set to the value obtained from optOutURL.
If using the Global iOS SDK, this optOutURL informs the user how to deactivate/activate “App Tracking/Limit Ad Tracking”.

In addition, The following text must be included in your app store description.
<blockquote>"Please note: This app features Nielsen’s proprietary measurement software which contributes to market research, like Nielsen’s Digital Content Ratings. Please see https://www.nielsen.com/th/en/legal/privacy-statement/digital-measurement/ for more information"</blockquote>

=== Global iOS SDK No Ad Framework Optout ===
The ''User Choice'' method can be used without the Ad Framework, or in situations where the publisher does not wish to use the [https://developer.apple.com/documentation/apptrackingtransparency App Tracking Transparency Framework]. As this flavor of the Nielsen SDK does not use the Ad Framework, so it is necessary to display an Optout Page to the userand capture their selection.

Similar to the Global iOS SDK Flavor, it is a requirement to display a WebView element whose loadUrl is set to the
value obtained from optOutURL. This is a special URL that indicates Opt-in, or Opt-out and close the WebView.

==== This opt-out method works as follows: ====
* Get the Nielsen opt-out URL via [[optOutURL]]
* Display a WebView element whose loadUrl is set to the value obtained from [[optOutURL]]
* Detect if the WebView URL changes to a special URL that indicates Opt-in, or Opt-out and close the WebView
** Opt-out if the WebView URL = <code>nielsenappsdk://1</code>
** Opt-in if the WebView URL = <code>nielsenappsdk://0</code>
* Pass the detected URL to the [[userOptOut]] function
** Example: <syntaxhighlight lang=swift>NielsenAppApi?.userOptOut("nielsenappsdk://1"); // User opt-out</syntaxhighlight>

=== Global iOS SDK No ID Optout (Kids Category) ===
If you are building an app that will be listed in the Kids Category:
#  Ensure that you are using the [https://nielsendownloads-green.digitalengsdk.com/digital/Nielsen-iOS-App-SDK-GlobalNoId_latest.zip NoID version] of the Nielsen SDK Framework.
#  Immediately following the initialization of the Nielsen SDK ensure you call the userOptOut API with Opt out selection: 
<syntaxhighlight lang=swift>NielsenAppApi?.userOptOut("nielsenappsdk://1"); // User opt-out</syntaxhighlight>

== Opt-out example code ==
===== Swift =====
<syntaxhighlight lang="swift">
import UIKit
import WebKit
import NielsenAppApi

class OptOutVC: UIViewController, NielsenAppApiDelegate, WKNavigationDelegate {
    var nielsenApi : NielsenAppApi!
    var webView: WKWebView!
   
    override func loadView() {
        webView = WKWebView()
        webView.navigationDelegate = self
        view = webView
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        if let appApi = self.nielsenApi {
            //Getting the optPut URL from SDK
            if let url = URL(string: appApi.optOutURL) {
                webView.load(URLRequest(url: url))
                webView.allowsBackForwardNavigationGestures = true
            }}}

        func closeOptOutView() {
            self.dismiss(animated: true, completion: nil)
        }
  
// Uncomment below code if you are using the Global iOS SDK No Ad Framework Flavor.  This will receive the user's selection
// From the custom User_Choice opt out page.  Only required for non-ad framework or no-id builds
// of the Nielsen SDK
/*  
        func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: 
@escaping (WKNavigationActionPolicy) -> Void) {
            print(navigationAction.request.url?.absoluteString as Any) //For debugging to check what is being passed from webpage.
            if navigationAction.request.url?.absoluteString == "nielsen://close" {
                closeOptOutView()
                decisionHandler(.cancel)
            } else {
                if let url = navigationAction.request.url?.absoluteString, url.hasPrefix("nielsen") {
                    nielsenApi?.userOptOut(url). //either nielsenappsdk://1 or nielsenappsdk://0
                    decisionHandler(.cancel)
                } else {
                    if navigationAction.navigationType == .linkActivated {
                        if let url = navigationAction.request.url?.absoluteString, url.hasSuffix("#") {
                            decisionHandler(.allow)
                        } else {
                            decisionHandler(.cancel)
                            webView.load(navigationAction.request)
                        }
                    } else {
                        decisionHandler(.allow)
                    }}}}
  */
}

</syntaxhighlight>
===== Objective-C =====
 <syntaxhighlight lang="objective-c">

#import "OptOutVC.h"
#import "NielsenInit.h"
#import <NielsenAppApi/NielsenAppApi.h>

@interface OptOutVC ()

@property (weak, nonatomic) IBOutlet UIWebView *webView;
@end

@implementation OptOutVC

- (void)viewDidLoad {
    [super viewDidLoad];

- (void)viewDidLoad {
    [super viewDidLoad];
    //Getting the optPut URL from eventTracker
    [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL
 URLWithString:self.nielsenApi.optOutURL]]];
}

//Uncomment below code if you are using the Global iOS SDK No Ad Framework Flavor.
// From the custom User_Choice opt out page.  Only required for non-ad framework or no-id builds
// of the Nielsen SDK
/*     
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction
 decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
{
    if ([navigationAction.request.URL.absoluteString isEqualToString:kNielsenWebClose])
    {   [self performSelector:@selector(closeOptOutView) withObject:nil afterDelay:0];
        decisionHandler(WKNavigationActionPolicyCancel); 
     } else {
        if ([navigationAction.request.URL.absoluteString hasPrefix:@"nielsen"])
        {[self.nielsenAppApi userOptOut:navigationAction.request.URL.absoluteString];
            decisionHandler(WKNavigationActionPolicyCancel); 
        } else {
            if (navigationAction.navigationType == WKNavigationTypeLinkActivated) 
            { if ([navigationAction.request.URL.absoluteString hasSuffix:@"#"]) 
                      {decisionHandler(WKNavigationActionPolicyAllow);
                } else {
                    decisionHandler(WKNavigationActionPolicyCancel);
                    [webView loadRequest:[NSURLRequest requestWithURL:navigationAction.request.URL]];
                }} else {
                 decisionHandler(WKNavigationActionPolicyAllow);
            }}}
*/
}

</syntaxhighlight>

== Retrieve current Opt-Out preference ==
Whether the user is opted out via OS-level Opt-out or via User Choice Opt-out, the current Opt-Out status as detected by the SDK is available via the [[optOutStatus]] property in the Nielsen SDK API
<syntaxhighlight lang="objective-c">
@property (readonly) BOOL optOutStatus
</syntaxhighlight>

{{iOS_Airplay}}

{{iOS_Going_Live}}

{{iOS_Removing_Simulator_Slices}}

== Sample Applications ==
The below sample applications have been designed to show the Simplified API's functionality and are broken into two distinct categories:
* '''Basic''' - To show the functionality of the Nielsen Simplified API using a standard no-frills player.
** [[Swift Basic Sample|Swift 5.0 Sample]]
** [[Objective-c Basic example|Objective-C Sample]]

* '''Advanced''' - Nielsen Simplified API integrated into a custom video player.