Unity项目接入IOS的Admob Native(原生视频广告) IOS SDK

    //定义OC方法（与IOS的方法对应）
    [DllImport("__Internal")]
    private static extern void initNativeAd(string appId, string nativeAd, bool isVideoStartMute);
    //C#调用IOS
    void InitNativeIOS(string appId, string nativeAd, bool isVideoStartMute)
    ｛
        initNativeAd(appId, nativeAd, isVideoStartMute);
    ｝

4.1 添加Admob IOS SDK，这里用的是GoogleMobileAdsSdkiOS-7.35.2

选择"Frameworks"文件夹右键"Add Files"

选择"GoogleMobileAds.framework"，勾选"Copy items if needed"，将SDK的库文件添加到工程

添加完成后

4.2 复制官方IOS Native Demo中的UI布局文件到项目

具体路径在Google下载的Demo文件夹下：

跟4.1操作一样，选择"Classes"文件夹右键"Add Files"，添加"UnifiedNativeAdView.xib"文件到项目

将适配方式改为"Freeform" ，xib文件的UI布局及其他设置，可以根据实际需求再做一些修改

4.3 新建 .h 和 .m 文件

选择 .m 文件

命名为"NativeAdController"（类名）

保存到"Classes"下

.h 文件与 .m 文件创建方式一样，且需要与 .m 文件同名

两个文件创建完成后：

5. 仿照官方Demo中的"ViewController"类，修改"NativeAdController"类（即刚刚创建的.h和.m文件）

代码说明都加到注释了，附在文末 ~

6. 运行到手机看一下效果，视频广告正常显示，完美~

到这里大部分工作已经完成了，可以在Xcode工程中获取以下三个文件，对于正式项目，只需在Unity中写好调用方法，导出Xcode工程，将SDK和这三个文件添加到Xcode工程里，就可以正常加载显示Native广告了。

也可以在Unity中导入Unity的SDK，然后将这三个文件放到Unity项目中，导出Xcode时会自动加入这三个文件，这样在Xcode就不需要额外的操作了，直接出包即可。

-----------------------------

附一：

Unity中C#调用IOS的OC方法：

NativeAdController C#

using UnityEngine;
using System.Runtime.InteropServices;
using UnityEngine.UI;
public class NativeAdController : MonoBehaviour
｛
    [SerializeField] Button showBtn;
    [SerializeField] Button hideBtn;
    string appIdIOS = "ca-app-pub-3940256099942544~1458002511";
    string nativeAdIdIOS = "ca-app-pub-3940256099942544/2521693316";
    bool nativeVideoAdStartMute = false;
    bool isInited = false;
    void Start()
    ｛
        showBtn.onClick.AddListener(() => ｛ if (IsNativeReady()) ShowNative(0); ｝);
        hideBtn.onClick.AddListener(HideNative);
        InitNative();
    ｝
    //----- public -----
    public void InitNative()
    ｛
        if (isInited)
            return;
        isInited = true;
        if (!string.IsNullOrEmpty(appIdIOS) && !string.IsNullOrEmpty(nativeAdIdIOS))
        InitNativeIOS(appIdIOS, nativeAdIdIOS, nativeVideoAdStartMute);
    ｝
    public bool IsNativeReady()
    ｛
        return IsNativeReadyIOS();
    ｝
    public void ShowNative(float positionParame)
    ｛
        if (positionParame < 0)
            positionParame = 0;
        else if (positionParame > 1)
            positionParame = 1;
        ShowNativeIOS(positionParame);
    ｝
    public void HideNative()
    ｛
        HideNativeIOS();
    ｝
    //----- IOS -----
    //定义OC方法
    [DllImport("__Internal")]
    private static extern void initNativeAd(string appId, string nativeAd, bool isVideoStartMute);
    [DllImport("__Internal")]
    private static extern bool isNativeAdReady();
    [DllImport("__Internal")]
    private static extern void showNativeAd(float positionParame);
    [DllImport("__Internal")]
    private static extern void hideNativeAd();
    //C#调用
    void InitNativeIOS(string appId, string nativeAd, bool isVideoStartMute)
    ｛
        initNativeAd(appId, nativeAd, isVideoStartMute);
    ｝
    bool IsNativeReadyIOS()
    ｛
        return isNativeAdReady();
    ｝
    void ShowNativeIOS(float positionParame)
    ｛
        showNativeAd(positionParame);
    ｝
    void HideNativeIOS()
    ｛
        hideNativeAd();
    ｝
｝

#import <UIKit/UIKit.h>
//声明，外部接口
@interface NativeAdController : UIViewController
@end

//添加库引用
#import "NativeAdController.h"
#import <GoogleMobileAds/GoogleMobileAds.h>
//标记广告是否加载完成
static bool isNativeReady;
//Native广告类
static GADUnifiedNativeAd *curNativeAd;
//Native广告Id
static NSString *nativeAdUnit;
//广告视频是否静音播放
static bool videoStartMute;
//声明，类似于定义内部接口
@interface NativeAdController () <GADUnifiedNativeAdLoaderDelegate,
GADVideoControllerDelegate,
GADUnifiedNativeAdDelegate>
@property(nonatomic, strong) GADAdLoader *adLoader;
//广告界面
//@property(nonatomic, strong) GADUnifiedNativeAdView *nativeAdView;
@property (nonatomic,strong) GADUnifiedNativeAdView *myView;
@property(nonatomic, strong) NSLayoutConstraint *heightConstraint;
@end
//实现，与声明对应
@implementation NativeAdController
static NativeAdController *myAdController;
//----- C方法，供Unity调用 -----
//初始化广告，Unity传参
void initNativeAd(char *appId, char *nativeAd, bool isVideoStartMute)
｛
    if(!myAdController)
        myAdController = [NativeAdController new];
    //C#的string不能直接转为OC的NSString，利用char转换
    NSString *ocAppId = [NSString stringWithUTF8String:appId];
    NSString *ocnativeAd = [NSString stringWithUTF8String:nativeAd];
    [myAdController initNative:ocAppId nativeAd:ocnativeAd isVideoStartMute:isVideoStartMute];
｝
//广告是否已加载
bool isNativeAdReady()
｛
    return [myAdController isNativeReady];
｝
//展示广告界面
void showNativeAd(float positionParame)
｛
    [myAdController showNative:positionParame];
｝
//隐藏广告界面
void hideNativeAd()
｛
    [myAdController hideNative];
｝
//----- OC方法 -----
-(void)initNative:(NSString *)appId nativeAd:(NSString *)nativeAd isVideoStartMute:(bool)isVideoStartMute
｛
    //初始化注册Native
    [GADMobileAds configureWithApplicationID:appId];
    nativeAdUnit = nativeAd;
    videoStartMute = isVideoStartMute;
    //获取"UnifiedNativeAdView.xib"，即广告界面布局文件
    NSArray *nibObjects = [[NSBundle mainBundle] loadNibNamed:@"UnifiedNativeAdView" owner:nil options:nil];
    self.myView = (GADUnifiedNativeAdView *)nibObjects.firstObject;
    //初始化设置广告界面在屏幕的位置
    CGFloat kscreenW = [UIScreen mainScreen].bounds.size.width;
    CGFloat kscreenH = [UIScreen mainScreen].bounds.size.height;
    self.myView.frame = CGRectMake(0, kscreenH - 275, kscreenW, 275);
    //    [self.view addSubview:self.myView];
    [UnityGetGLView() addSubview:self.myView];
    //隐藏广告界面
    [self.myView setHidden:YES];
    //请求广告
    [self refreshAd];
｝
-(Boolean) isNativeReady
｛
    //外部获取广告状态时，如果未加载，请求广告
    if(!isNativeReady)
    ｛
        [self refreshAd];
    ｝
    return isNativeReady;
｝
-(void) showNative:(float) positionParame
｛
    if(isNativeReady)
    ｛
        //刷新广告界面
        [self showNativeAdView:positionParame];
        //显示广告界面
        [self.myView setHidden:NO];
    ｝
｝
-(void) hideNative
｛
    //隐藏广告界面
    [self.myView setHidden:YES];
    //请求广告
    [self refreshAd];
｝
//----------
- (void)refreshAd ｛
    isNativeReady = false;
    //请求广告
    GADVideoOptions *videoOptions = [[GADVideoOptions alloc] init];
    videoOptions.startMuted = videoStartMute;
    self.adLoader = [[GADAdLoader alloc] initWithAdUnitID:nativeAdUnit
                                       rootViewController:self
                                                  adTypes:@[ kGADAdLoaderAdTypeUnifiedNative ]
                                                  options:@[ videoOptions ]];
    self.adLoader.delegate = self;
    //发送请求
//    //测试使用
//    GADRequest *request = [GADRequest request];
//    request.testDevices = @[@"9c8cbe613c43e2997f2dd0620fb6deb7"];
//    [self.adLoader loadRequest:request];
    //正式使用
    [self.adLoader loadRequest: [GADRequest request]];
｝
//设置星级
- (UIImage *)imageForStars:(NSDecimalNumber *)numberOfStars ｛
    double starRating = numberOfStars.doubleValue;
    if (starRating >= 5) ｛
        return [UIImage imageNamed:@"stars_5"];
    ｝ else if (starRating >= 4.5) ｛
        return [UIImage imageNamed:@"stars_4_5"];
    ｝ else if (starRating >= 4) ｛
        return [UIImage imageNamed:@"stars_4"];
    ｝ else if (starRating >= 3.5) ｛
        return [UIImage imageNamed:@"stars_3_5"];
    ｝ else ｛
        return nil;
    ｝
｝
//加载失败回调
#pragma mark GADAdLoaderDelegate implementation
- (void)adLoader:(GADAdLoader *)adLoader didFailToReceiveAdWithError:(GADRequestError *)error ｛
    NSLog(@"%@ failed with error: %@", adLoader, error);
｝
//加载成功回调
#pragma mark GADUnifiedNativeAdLoaderDelegate implementation
- (void)adLoader:(GADAdLoader *)adLoader didReceiveUnifiedNativeAd:(GADUnifiedNativeAd *)nativeAd ｛
    curNativeAd = nativeAd;
    isNativeReady = true;
｝
//刷新广告界面
-(void)showNativeAdView:(float)positionParame
｛
    if(curNativeAd!= nil)
    ｛
        GADUnifiedNativeAdView *nativeAdView = self.myView;
        //设置广告界面在屏幕的位置
        CGFloat kscreenW = [UIScreen mainScreen].bounds.size.width;
        CGFloat kscreenH = [UIScreen mainScreen].bounds.size.height;
        nativeAdView.frame = CGRectMake(0, (kscreenH - 265) * (1-positionParame), kscreenW, 265);
        // Deactivate the height constraint that was set when the previous video ad loaded.
        self.heightConstraint.active = NO;
        nativeAdView.nativeAd = curNativeAd;
        // Set ourselves as the ad delegate to be notified of native ad events.
        curNativeAd.delegate = self;
        //根据广告返回值刷新UI界面
        // Populate the native ad view with the native ad assets.
        // Some assets are guaranteed to be present in every native ad.
        ((UILabel *)nativeAdView.headlineView).text = curNativeAd.headline;
        ((UILabel *)nativeAdView.bodyView).text = curNativeAd.body;
        [((UIButton *)nativeAdView.callToActionView)setTitle:curNativeAd.callToAction
                                                    forState:UIControlStateNormal];
        // Some native ads will include a video asset, while others do not. Apps can
        // use the GADVideoController's hasVideoContent property to determine if one
        // is present, and adjust their UI accordingly.
        if (curNativeAd.videoController.hasVideoContent) ｛
            // This app uses a fixed width for the GADMediaView and changes its height
            // to match the aspect ratio of the video it displays.
            if (curNativeAd.videoController.aspectRatio > 0) ｛
                self.heightConstraint =
                [NSLayoutConstraint constraintWithItem:nativeAdView.mediaView
                                             attribute:NSLayoutAttributeHeight
                                             relatedBy:NSLayoutRelationEqual
                                                toItem:nativeAdView.mediaView
                                             attribute:NSLayoutAttributeWidth
                                            multiplier:(1 / curNativeAd.videoController.aspectRatio)
                                              constant:-10];
                self.heightConstraint.active = YES;
            ｝
            // By acting as the delegate to the GADVideoController, this ViewController
            // receives messages about events in the video lifecycle.
            curNativeAd.videoController.delegate = self;
            //    self.videoStatusLabel.text = @"Ad contains a video asset.";
        ｝ else ｛
            //    self.videoStatusLabel.text = @"Ad does not contain a video.";
        ｝
        // These assets are not guaranteed to be present, and should be checked first.
        ((UIImageView *)nativeAdView.iconView).image = curNativeAd.icon.image;
        if (curNativeAd.icon != nil) ｛
            nativeAdView.iconView.hidden = NO;
        ｝ else ｛
            nativeAdView.iconView.hidden = YES;
        ｝
        ((UIImageView *)nativeAdView.starRatingView).image = [self imageForStars:curNativeAd.starRating];
        if (curNativeAd.starRating) ｛
            nativeAdView.starRatingView.hidden = NO;
        ｝ else ｛
            nativeAdView.starRatingView.hidden = YES;
        ｝
        ((UILabel *)nativeAdView.storeView).text = curNativeAd.store;
        if (curNativeAd.store) ｛
            nativeAdView.storeView.hidden = NO;
        ｝ else ｛
            nativeAdView.storeView.hidden = YES;
        ｝
        ((UILabel *)nativeAdView.priceView).text = curNativeAd.price;
        if (curNativeAd.price) ｛
            nativeAdView.priceView.hidden = NO;
        ｝ else ｛
            nativeAdView.priceView.hidden = YES;
        ｝
        ((UILabel *)nativeAdView.advertiserView).text = curNativeAd.advertiser;
        if (curNativeAd.advertiser) ｛
            nativeAdView.advertiserView.hidden = NO;
        ｝ else ｛
            nativeAdView.advertiserView.hidden = YES;
        ｝
        // In order for the SDK to process touch events properly, user interaction should be disabled.
        nativeAdView.callToActionView.userInteractionEnabled = NO;
    ｝
｝
//广告视频播放完成回调
#pragma mark GADVideoControllerDelegate implementation
- (void)videoControllerDidEndVideoPlayback:(GADVideoController *)videoController ｛
    NSLog(@"Video playback has ended.");
｝
//其他回调
#pragma mark GADUnifiedNativeAdDelegate
- (void)nativeAdDidRecordClick:(GADUnifiedNativeAd *)nativeAd ｛
    NSLog(@"%s", __PRETTY_FUNCTION__);
｝
- (void)nativeAdDidRecordImpression:(GADUnifiedNativeAd *)nativeAd ｛
    NSLog(@"%s", __PRETTY_FUNCTION__);
｝
- (void)nativeAdWillPresentScreen:(GADUnifiedNativeAd *)nativeAd ｛
    NSLog(@"%s", __PRETTY_FUNCTION__);
｝
- (void)nativeAdWillDismissScreen:(GADUnifiedNativeAd *)nativeAd ｛
    NSLog(@"%s", __PRETTY_FUNCTION__);
｝
- (void)nativeAdDidDismissScreen:(GADUnifiedNativeAd *)nativeAd ｛
    NSLog(@"%s", __PRETTY_FUNCTION__);
｝
- (void)nativeAdWillLeaveApplication:(GADUnifiedNativeAd *)nativeAd ｛
    NSLog(@"%s", __PRETTY_FUNCTION__);
｝
@end