Build a custom adapter for iOS

Develop a custom adapter for your network on iOS by creating a base adapter class and ad unit classes, initializing the network SDK, and implementing ad unit logic.

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This document covers the steps to build a custom adapter and provide your publishers the resources required to integrate your network with Unity LevelPlay.

Prerequisites

Complete the custom adapter registration form
Ensure that you have the following information available:
- Adapter class names
- Network configuration keys
Download the latest ironSource SDK here

Also consider the following best practices:

Ensure that you handle main-thread requirements as part of your code
Ensure that you add code protections and exception handling to protect apps from unexpected failures

Create an adapter for your network

Your network adapter will manage the network ads logic and allow publishers to display your networks ads as part of their Unity LevelPlay configuration. As part of this process, you will need to create an adapter class (referred as BaseAdapter) and an additional class for each ad unit you intend to support. The BaseAdapter will back your network management, including the network initialization process, and allow you to define variables and constants that will be available throughout the session, for all ad units. The ad unit classes will manage the ad unit logic for loading, showing, and managing the ad, and will be instantiated per each ad appearance in the waterfall.

Create your network base adapter

To implement your network adapter, create a new class and import ironSource ISBaseNetworkAdapter class. Use the Base adapter name you received from your network registration confirmation email when creating your adapter.


#import "IronSource/IronSource.h"
@interface IS<YourNetworkName>CustomAdapter : ISBaseNetworkAdapter

Initialize network SDK

Unity LevelPlay will call the init method of the base adapter as part of any initialization process in the mediation. As a result, this method can be called several times. As part of your init implementation, make sure to call the initialization callbacks defined in the NetworkInitializationListener each time; upon success (onInitSuccess) and/or upon failure (onInitFailed). The adData param will include the configuration data as provided by the publisher in the Unity LevelPlay platform. Learn more on ISAdData class here.


(void)init:(ISAdData *)adData
delegate:(id<ISNetworkInitializationDelegate>)delegate { 
   ... 
   // handle errors 
   if (error-handling) { 
      [delegate onInitDidFailWithErrorCode:ISAdapterErrorMissingParams 
                              errorMessage:error]; 
   } 
   // init success 
   [delegate onInitDidSucceed]; 
}

Provide SDK and adapter versions

This information will indicate which SDK and adapter versions are currently implemented on the publisher's app. When implementing getNetworkSDKVersion, we recommend using a method rather than a hard-coded value, to allow more flexibility in terms of adapter updates and SDK support.


- (NSString *) networkSDKVersion {
   return [ALSdk version];
}
- (NSString *) adapterVersion {
   return kAdapterVersion;
}

Add support for interstitial ad unit

Create interstitial ad unit class

Create a class that will manage your interstitial ad unit. Import ironSource ISBaseAdAdapter, and make sure to add relevant delegates to your main adapter file. This class will be activated whenever the publisher triggers a new interstitial ad in the app by the Load method. Use the interstitial class names you received from ironSource as part of the registration process.


#import "IronSource/IronSource.h"
@interface IS<YourNetworkName>CustomInterstitial : ISBaseInterstitial

Request an interstitial ad

Override the loadAdWithAdData method to allow publishers to request interstitial ads from your network. The ISAdData will allow you to access the publisher input and to receive the ad identifiers that are required for this process. Make sure to implement the ISInterstitialAdDelegate callbacks for successful load of an ad (adDidLoad) and for any kind of failure (adDidFailToLoadWithErrorType). In case the listener callback is not triggered after a pre-defined amount of time, the meditation will stop the load process due to a timeout, and the network will not be able to provide an ad.


- (void)loadAdWithAdData:(nonnull ISAdData *)adData
               delegate:(nonnull id<ISInterstitialAdDelegate>)delegate {

   // Load your ad 
}

Check if ad is available

Override the isAdAvailableWithAdData method to allow publishers to check each ad's readiness before trying to present it to the user. The method should return YES if an ad is loaded successfully, or NO if no ad is currently loaded. This can be done by using the network's is-ad-available indication, if it exists, or by managing the ad's status manually as part of loadAdWithAdData and showAdWithViewController methods.


- (BOOL)isAdAvailableWithAdData:(nonnull ISAdData *)adData {
   return _renderedAd != nil;
}

Show an interstitial ad

After an ad is loaded successfully, the publisher should be able to show it. You can override the showAdWithViewController method after verifying that isAdAvailableWithAdData is true, to provide a better experience for publishers. Part of the information you receive in this method is ISAdData. Using this object, you will be allowed to show the relevant ad. The adDidFailToShowWithErrorCode callback should be returned if the show could not be performed.


- (void)showAdWithViewController:(nonnull UIViewController *)viewController
                        adData:(nonnull ISAdData *)adData
                        delegate:(nonnull id<ISInterstitialAdDelegate>)delegate {
   // check if ad can be displayed
   if (CannotShowsAd) {
      [delegate adDidFailToShowWithErrorCode:ISAdapterErrorInternal
                                 errorMessage:nil];
      return;
   }
   // show ad 
   [_ad showAd:_renderedAd];
}

Report the ISInterstitialAdDelegate callbacks

Make sure to override ISInterstitialAdDelegate callbacks according to the network's functionality. Reporting the delegates correctly will ensure Unity LevelPlay's best practice flow, and will enable the network's performance data to be reflected correctly in the ironSource platform.

Mandatory callbacks


// Indicates that interstitial ad was loaded successfully 
- (void)adDidLoad;

// The interstitial ad failed to load. Use ironSource ErrorTypes (No Fill / Other)
- (void)adDidFailToLoadWithErrorType:(ISAdapterErrorType)errorType
                           errorCode:(NSInteger)errorCode
                        errorMessage:(NSString*)errorMessage;

// The interstitial ad was displayed successfully to the user. This indicates an impression.
- (void)adDidOpen;

// User closed the interstitial ad
- (void)adDidClose;

// The ad could not be displayed
- (void)adDidFailToShowWithErrorCode:(NSInteger)errorCode
                        errorMessage:(NSString*)errorMessage;

Optional callbacks


// Implement if in addition to ad-open (impression), your ad network reports also show success indication 
- (void)adDidShowSucceed;

// Indicates the ad was clicked
- (void)adDidClick;

How to get data from your base adapter (optional)

Use the getNetworkAdapter API if your base adapter manages states or params that are relevant for your ad units through the session. This includes any objects defined as part of your base adapter that should be used in your ad-unit APIs.


// example of data retrieved from your network level adapter
IS<yourNetworkName>CustomAdapter *sampleNetworkAdapter = nil;
id<ISAdapterBaseProtocol> adapter = [self getNetworkAdapter];
if ([adapter isKindOfClass:[IS<yourNetworkName>CustomAdapter class]]) {
   sampleNetworkAdapter = (IS<yourNetworkName>CustomAdapter*) adapter;
}

Add support for rewarded video ad unit

Create rewarded video ad unit class

Create a class that will manage your interstitial ad unit. Import ironSource ISBaseAdAdapter, and make sure to add relevant delegates to your main adapter file. This class will be activated whenever the publisher triggers a new interstitial ad in the app by the Load method. Use the rewarded video class names you received from ironSource as part of the registration process.


#import "IronSource/IronSource.h"
@interface IS<YourNetworkName>CustomRewardedVideo : ISBaseRewardedVideo

Request an rewardedVideo ad

Override the loadAdWithAdData method to allow publishers to request interstitial ads from your network. The ISAdData will allow you to access the publisher input and to receive the ad identifiers that are required for this process. Make sure to implement the ISRewardedVideoAdDelegate callbacks for successful load of an ad (adDidLoad) and for any kind of failure (adDidFailToLoadWithErrorType). In case the listener callback is not triggered after a pre-defined amount of time, the meditation will stop the load process due to a timeout, and the network will not be able to provide an ad.


- (void)loadAdWithAdData:(nonnull ISAdData *)adData
               delegate:(nonnull id<ISRewardedVideoAdDelegate>)delegate {

   // Load your ad
}

Check if ad is available


- (BOOL)isAdAvailableWithAdData:(nonnull ISAdData *)adData {
   ... 
   return _renderedAd != nil;
}

Show a rewarded video ad


- (void)showAdWithViewController:(nonnull UIViewController *)viewController
                        adData:(nonnull ISAdData *)adData
                        delegate:(nonnull id<ISRewardedVideoAdDelegate>)delegate {
   // check if ad can be displayed if (CannotShowsAd) {
      [delegate adDidFailToShowWithErrorCode:ISAdapterErrorInternal
                              errorMessage:nil];
   
      return;
   }
   // show ad
   [_ad showAd:_renderedAd];
}

Report the ISRewardedVideoAdDelegate callbacks

Make sure to override ISRewardedVideoAdDelegate callbacks according to the network's functionality. Reporting the delegates correctly will ensure Unity LevelPlay mediation's best practice flow, and will enable the network's performance data to be reflected correctly in the ironSource platform.

Mandatory callbacks


// Indicates that rewarded video ad was loaded successfully 
- (void)adDidLoad;

// The rewarded video ad failed to load. Use ironSource ErrorTypes (No Fill / Other)
- (void)adDidFailToLoadWithErrorType:(ISAdapterErrorType)errorType
                           errorCode:(NSInteger)errorCode
                        errorMessage:(NSString*)errorMessage;
// The rewarded video ad was displayed successfully to the user. This indicates an impression.
- (void)adDidOpen;

// User closed the rewarded video ad
- (void)adDidClose;

// The ad could not be displayed
- (void)adDidFailToShowWithErrorCode:(NSInteger)errorCode
                        errorMessage:(NSString*)errorMessage;

// User clicked the rewarded video ad
- (void)adDidClick;

// User received a reward after watching the ad
- (void)adRewarded;

Optional callbacks


// Indicates the video ad started 
- (void)adDidStart;

// Indicates the video ad ended
- (void)adDidEnd

// indicates that ad is displayed on foreground
- (void)adDidBecomeVisible

// Implement if in addition to ad-open (impression), your ad network reports also show success indication
- (void)adDidShowSucceed

How to get data from your base adapter (optional)


// example of data retrieved from your network level adapter
IS<yourNetworkName>CustomAdapter *sampleNetworkAdapter = nil;
id<ISAdapterBaseProtocol> adapter = [self getNetworkAdapter];
if ([adapter isKindOfClass:[IS<yourNetworkName>CustomAdapter class]]) {
   sampleNetworkAdapter = (IS<yourNetworkName>CustomAdapter*) adapter;
}

Add support for banner ad unit

Step 1. Create banner ad unit class

Create a class that will manage your banner ad unit. This class will be activated whenever the publisher triggers a new banner ad in the app by the Load method. Use the banner class names you received from ironSource as part of the registration process.


#import "IronSource/IronSource.h"
@interface IS<YourNetworkName>CustomBanner : ISBaseBanner

Banner Sizes

Refer to the following table for details about our supported banner sizes. Custom networks may support any combination of these sizes. The banner size will be received as a param as part of the loadAdWithAdData API. When the banner size received is SMART, make sure to change the size either to BANNER or LEADERBOARD, according to the device screen sizes (see instructions below).

ISBannerSize	Description	Dimensions in points (WxH)
ISBannerSize_BANNER	Standard Banner	320 x 50
ISBannerSize_LARGE	Large Banner	320 x 90
ISBannerSize_RECTANGLE	Medium Rectangular (MREC)	300 x 250
ISBannerSize_SMART	Smart Banner (Automatically renders ads to adjust size and orientation for iPhone & iPad)	If (iPhone ≤ 720) 320 x 50 If (iPad > 720) 728 x 90

Step 2. Request a banner ad

Override the loadAdWithAdData method to allow publishers to request banner ads from your network. The ISAdData will allow you to access the publisher input and to receive the ad identifiers that are required for this process, and the ISBannerSize will indicate the requested banner size.


- (void)loadAdWithAdData:(nonnull ISAdData *)adData
   viewController:(UIViewController *)viewController
         size:(ISBannerSize *)size
      delegate:(nonnull id<ISBannerAdDelegate>)delegate{
}

Step 3. Destroy banner

ironSource requires app developers to destroy a banner ad by implementing the following destroyAdWithAdData method.


public void destroyAdWithAdData:(nonnull ISAdData *)adData {}

Note

If your network SDK does not support this kind of API, you should add an empty implementation.

Step 4. Report the ISBannerAdDelegate callbacks

Report the ISBannerAdDelegate callbacks according to the network's functionality. This will ensure the network's performance data to be reflected correctly in the ironSource platform.

Mandatory callbacks


 // Indicates that a banner ad was loaded successfully -
(void)adDidLoadWithView:(UIView *) view // The banner ad failed to load. Use
ironSource ErrorTypes (No Fill / Other)
-(void)adDidFailToLoadWithErrorType:(ISAdapterErrorType)errorType
errorCode:(NSInteger)errorCode errorMessage:(nullable NSString*)errorMessage
// The banner ad is displayed successfully to the user. This indicates an
impression on the ironSource platform. -(void)adDidOpen // Indicates an ad
was clicked -(void)adDidClick

Note

Pass the banner view returned by the network.

Optional callbacks


//Should be invoked after a click, and before the user is
taken out of the app - (void)adWillLeaveApplication // Should be invoked
after the ad view presents fullscreen content- (void)adWillPresentScreen; -
(void)adWillPresentScreen // Should be invoked after the fullscreen content
is dismissed - (void)adDidDismissScreen

Access publisher's input by using the adapter

As part of the custom adapter registration process, you provided App and Instance level keys. The value of these keys will be defined by the publisher on the Unity LevelPlay platform configuration. These values will be available for you in run-time by using the ISAdData object. The ISAdData object contains a map with the configuration values, and is part of the adapter and the ad unit classes APIs. This parameter is available in the init, loadAdWithAdData, showAdWithViewController and isAdAvailableWithAdData methods. You can access the values from the ISAdData map structure using the names you received as part of the registration confirmation email.


// Get Publisher setup parameters 
NSString *appLevelParam1 = ISAdData.configuration[<YourAppLevelParam1>];
NSString *instanceLevelParam1 = ISAdData.configuration[<YourInstanceLevelParam1>];
NSString *instanceLevelParam2 = ISAdData.configuration[<YourInstanceLevelParam2>];

Use ironSource error codes and error types

Error type

This is relevant for adDidFailToLoadWithErrorType delegates.

Error type	Description
ISAdapterErrorTypeNoFill	Used when there is no available ad to show
ISAdapterErrorTypeInternal	Used for any other reason reported by the network

Error codes

These error codes are relevant for adDidFailToLoadWithErrorType and adDidFailToShowWithErrorCode delegates.

Error code	Description
ISAdapterErrorMissingParams	The action failed because some required information was not available when API was called
ISAdapterErrorAdExpired	Use to indicate if the ad was expired
ISAdapterErrorInternal	Used for any other error reported by the network

Debug your adapter (optional)

If you choose to support debug logs, implement and call the setAdapterDebug method from your app. This should be done as part of the ISBaseNetworkAdapter.


- (void) setAdapterDebug:(BOOL) adapterDebug {
   _adapterDebug = adapterDebug;
}

Build a custom adapter for iOS

Prerequisites

Create an adapter for your network

Create your network base adapter

Initialize network SDK

Provide SDK and adapter versions

Add support for interstitial ad unit

Create interstitial ad unit class

Request an interstitial ad

Check if ad is available

Show an interstitial ad

Report the ISInterstitialAdDelegate callbacks

Mandatory callbacks

Optional callbacks

How to get data from your base adapter (optional)

Add support for rewarded video ad unit

Create rewarded video ad unit class

Request an rewardedVideo ad

Check if ad is available

Show a rewarded video ad

Report the ISRewardedVideoAdDelegate callbacks

Mandatory callbacks

Optional callbacks

How to get data from your base adapter (optional)

Add support for banner ad unit

Step 1. Create banner ad unit class

Banner Sizes

ISBannerSize

Description

Dimensions in points (WxH)

Step 2. Request a banner ad

Step 3. Destroy banner

Step 4. Report the ISBannerAdDelegate callbacks

Mandatory callbacks

Optional callbacks

Access publisher's input by using the adapter

Use ironSource error codes and error types

Error type

Error type

Description

Error codes

Error code

Description

Debug your adapter (optional)