AdMob Mediation Interstitial

首先將AdMob和TAMedia SDK整合至專案中，AdMob SDK可以在這裡下載 https://developers.google.com/mobile-ads-sdk/download?#downloadios。
接著在AdMob Mediation新增Custom Event（https://mediation.admob.com）。
新增Custom Event的詳細說明可以參考https://developers.google.com/mobile-ads-sdk/docs/admob/mediation#ios。
最後，在專案中加入與Custom Event對應的Class，其中Custom Event的Class Name需要和新增的Class Name保持一致，例如Custom Event的Class Name是TADCustomView，則新增的Class Name也必須為TADCustomView。

Custom Interstitial View

// TADCustomInterstitial.h

// 匯入 TAMedia SDK 定義
#import "TADInterstitial.h"
#import "TADInterstitialDelegate.h"

// 匯入 Admob SDK 定義
#import "GADCustomEventInterstitial.h"
#import "GADCustomEventInterstitialDelegate.h"

@interface TADCustomInterstitial : NSObject <GADCustomEventInterstitial, TADInterstitialDelegate>
{
    // 以 instant variable 的方式, 宣告 interstitialView 物件
    TADInterstitial *_interstitialView;
}

@property (nonatomic, weak) id<GADCustomEventInterstitialDelegate> delegate;

@end

// TADCustomInterstitial.m

#import "TADCustomInterstitial.h"

@interface TADCustomInterstitial ()
@end

@implementation TADCustomInterstitial

@synthesize delegate = _delegate;

- (void)requestInterstitialAdWithParameter:(NSString *)serverParameter
                                     label:(NSString *)serverLabel
                                   request:(GADCustomEventRequest *)customEventRequest {
    
    // 將 GADCustomEventRequest 物件裡的資訊轉入 TADRequest 物件
    TADRequest *tadRequest = [TADRequest request];
    tadRequest.testing = customEventRequest.isTesting;
    tadRequest.gender = (TADGender)customEventRequest.userGender;
    tadRequest.birthday = customEventRequest.userBirthday;
    [tadRequest setLocationWithLatitude:customEventRequest.userLatitude longitude:customEventRequest.userLongitude accuracy:customEventRequest.userLocationAccuracyInMeters];
    
    // interstitialView 物件初始化
    if (_interstitialView == nil) {
        _interstitialView = [[TADInterstitial alloc] init];
    }
    
    // 必須要設定delegate
    _interstitialView.delegate = self;
    
    // serverParameter 為 AD Unit ID, 在 Admob 裡設定
    _interstitialView.adUnitID = serverParameter;
    
    // 載入廣告
    [_interstitialView loadRequest:tadRequest];
}

- (void)presentFromRootViewController:(UIViewController *)rootViewController {
    [_interstitialView presentFromRootViewController:rootViewController];
}


#pragma mark -
#pragma mark - TADInterstitialDelegate


- (void)interstitialDidReceiveAd:(TADInterstitial *)ad {
    NSLog(@"[Test App] interstitialDidReceiveAd:%@", ad);

    // 在成功收到廣告之後，將 Interstitial 廣告開啓
    [self presentFromRootViewController:nil];
    
    // 在成功收到廣告之後，將 interstitial 物件的 delegate 設為 self 以外的永存物件，以避免 crash 的發生！
    // 這裡選擇使用 UIApplication 的 window 物件
    _interstitialView.delegate = [[UIApplication sharedApplication].windows objectAtIndex:0];
}

- (void)interstitial:(TADInterstitial *)ad didFailToReceiveAdWithError:(TADRequestError *)error {
    NSLog(@"[Test App] didFailToReceiveAdWithError:%@ %@", ad, error);
}

- (void)interstitialWillPresentScreen:(TADInterstitial *)ad {
    NSLog(@"[Test App] interstitialWillPresentScreen:%@", ad);
}

- (void)interstitialWillDismissScreen:(TADInterstitial *)ad {
    NSLog(@"[Test App] interstitialWillDismissScreen:%@", ad);
}

- (void)interstitialDidDismissScreen:(TADInterstitial *)ad {
    NSLog(@"[Test App] interstitialDidDismissScreen:%@", ad);
    
    // interstitial 廣告關閉時, 要將 interstitialView 及其 delegate 設為 nil
    _interstitialView.delegate = nil;
    _interstitialView = nil;
}

- (void)interstitialWillLeaveApplication:(TADInterstitial *)ad {
    NSLog(@"[Test App] interstitialWillLeaveApplication:%@", ad);
}

@end

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