给我提供一个 Applovin Max播放广告的demo

好的，以下是一个使用 AppLovin MAX 播放广告的示例代码：

1. 首先，在你的项目中添加 AppLovin SDK 和 AppLovin MAX SDK 的依赖。

2. 初始化 AppLovin SDK，在 AppDelegate.m 文件中添加以下代码：

#import <AppLovinSDK/AppLovinSDK.h>

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // 初始化 AppLovin SDK
    [ALSdk initializeSdk];
    return YES;
}

3. 在需要播放广告的地方创建一个 ALIncentivizedInterstitial 对象，并设置其代理：

#import <AppLovinSDK/AppLovinSDK.h>

@interface MyViewController () <ALAdLoadDelegate, ALAdDisplayDelegate, ALAdVideoPlaybackDelegate, ALIncentivizedInterstitialDelegate>

@property (nonatomic, strong) ALIncentivizedInterstitialAd *incentivizedInterstitial;

@end

@implementation MyViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    // 创建 ALIncentivizedInterstitial 对象
    self.incentivizedInterstitial = [[ALIncentivizedInterstitialAd alloc] initWithSdk:[ALSdk shared]];
    self.incentivizedInterstitial.adDisplayDelegate = self;
    self.incentivizedInterstitial.adVideoPlaybackDelegate = self;
    self.incentivizedInterstitial.adLoadDelegate = self;
    self.incentivizedInterstitial.delegate = self;
    
    // 加载广告
    [self.incentivizedInterstitial preloadAndNotify];
}

// 实现 ALAdLoadDelegate 协议
- (void)adService:(nonnull ALAdService *)adService didLoadAd:(nonnull ALAd *)ad {
    NSLog(@"广告加载成功");
}

- (void)adService:(nonnull ALAdService *)adService didFailToLoadAdWithError:(int)code {
    NSLog(@"广告加载失败，错误代码：%d", code);
}

// 实现 ALAdDisplayDelegate 协议
- (void)ad:(nonnull ALAd *)ad wasDisplayedIn:(nonnull UIView *)view {
    NSLog(@"广告显示成功");
}

- (void)ad:(nonnull ALAd *)ad wasHiddenIn:(nonnull UIView *)view {
    NSLog(@"广告已关闭");
}

- (void)ad:(nonnull ALAd *)ad wasClickedIn:(nonnull UIView *)view {
    NSLog(@"广告被点击了");
}

// 实现 ALAdVideoPlaybackDelegate 协议
- (void)videoPlaybackBeganInAd:(nonnull ALAd *)ad {
    NSLog(@"广告视频开始播放");
}

- (void)videoPlaybackEndedInAd:(nonnull ALAd *)ad atPlaybackPercent:(nonnull NSNumber *)percentPlayed fullyWatched:(BOOL)wasFullyWatched {
    NSLog(@"广告视频播放结束，播放进度：%d%%，是否完全观看：%d", [percentPlayed intValue], wasFullyWatched);
}

// 实现 ALIncentivizedInterstitialDelegate 协议
- (void)incentivizedInterstitial:(nonnull ALIncentivizedInterstitialAd *)incentivizedInterstitial didFailToLoadWithError:(NSInteger)errorCode {
    NSLog(@"激励视频加载失败，错误代码：%ld", (long)errorCode);
}

- (void)incentivizedInterstitialDidLoad:(nonnull ALIncentivizedInterstitialAd *)incentivizedInterstitial {
    NSLog(@"激励视频加载成功");
}

- (void)incentivizedInterstitial:(nonnull ALIncentivizedInterstitialAd *)incentivizedInterstitial didFailToDisplayWithError:(NSInteger)errorCode {
    NSLog(@"激励视频播放失败，错误代码：%ld", (long)errorCode);
}

- (void)incentivizedInterstitialDidDisplay:(nonnull ALIncentivizedInterstitialAd *)incentivizedInterstitial {
    NSLog(@"激励视频开始播放");
}

- (void)incentivizedInterstitial:(nonnull ALIncentivizedInterstitialAd *)incentivizedInterstitial didCompleteAdWithWasFullyWatched:(BOOL)wasFullyWatched {
    NSLog(@"激励视频播放结束，是否完全观看：%d", wasFullyWatched);
}

- (void)incentivizedInterstitial:(nonnull ALIncentivizedInterstitialAd *)incentivizedInterstitial didClickWithUrl:(nullable NSURL *)url {
    NSLog(@"激励视频被点击了，URL：%@", url);
}

@end

4. 在需要播放广告的地方调用以下代码：

if (self.incentivizedInterstitial.isReadyForDisplay) {
    [self.incentivizedInterstitial showAd];
} else {
    NSLog(@"广告未准备好");
}

以上就是一个简单的使用 AppLovin MAX 播放广告的示例代码，您可以根据自己的需求进行修改和扩展。