XXADManager.m

//
//  XXADManager.m
//  XXAD
//
//  Created by SWKJ on 2019/9/24.
//  Copyright © 2019 XX. All rights reserved.
//

#import "XXADManager.h"
#import <GoogleMobileAds/GADInterstitialDelegate.h>

@import GoogleMobileAds;

@interface XXADManager() <GADInterstitialDelegate>
{
    
    UIViewController *AdViewController;
}

@property (nonatomic, strong) UIWindow* window;

@property(nonatomic, strong) GADInterstitial *interstitial;

@end

@implementation XXADManager

//在load 方法中，启动监听，可以做到无注入
+ (void)load
{
    [self shareInstance];
}

+ (instancetype)shareInstance
{
    static id instance;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        instance = [[self alloc] init];
    });
    return instance;
}

- (instancetype)init
{
    self = [super init];
    if (self)
    {
        ///如果是没啥经验的开发，请不要在初始化的代码里面做别的事，防止对主线程的卡顿，和 其他情况
        ///应用启动, 首次开屏广告
        [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationDidFinishLaunchingNotification object:nil queue:nil usingBlock:^(NSNotification * _Nonnull note) {
            ///要等DidFinished方法结束后才能初始化UIWindow，不然会检测是否有rootViewController
            [self show];
            [self CheakAd];
        }];
        ///进入后台
        [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationDidEnterBackgroundNotification object:nil queue:nil usingBlock:^(NSNotification * _Nonnull note) {
            
        }];
        ///后台启动,二次开屏广告
        [[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationWillEnterForegroundNotification object:nil queue:nil usingBlock:^(NSNotification * _Nonnull note) {
            
            [self show];
            [self CheakAd];
        }];
    }
    return self;
}



-(void)CheakAd
{   //这一部分的逻辑大家根据自身需求定制
    //谷歌插屏广告
    self.interstitial = [self createAndLoadInterstitial];
}

- (GADInterstitial *)createAndLoadInterstitial
{
  GADInterstitial *interstitial =
      [[GADInterstitial alloc] initWithAdUnitID:@"你的广告ID"];
  interstitial.delegate = self;
  [interstitial loadRequest:[GADRequest request]];
  return interstitial;
}

- (void)show
{
    ///初始化一个Window， 做到对业务视图无干扰。
    UIWindow *window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    AdViewController=[UIViewController new];
    window.rootViewController = AdViewController;
    window.rootViewController.view.backgroundColor = [UIColor clearColor];
    window.rootViewController.view.userInteractionEnabled = NO;
    
    ///广告布局
    [self setupSubviews:window];
    
    ///设置为最顶层，防止 AlertView 等弹窗的覆盖
    window.windowLevel = UIWindowLevelStatusBar + 1;
    
    ///默认为YES，当你设置为NO时，这个Window就会显示了
    window.hidden = NO;
    window.alpha = 1;
    
    ///防止释放，显示完后  要手动设置为 nil
    self.window = window;
}

- (void)hide
{
    ///来个渐显动画
    [UIView animateWithDuration:0.3 animations:^{
        self.window.alpha = 0;
    } completion:^(BOOL finished) {
        [self.window.subviews.copy enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
            [obj removeFromSuperview];
        }];
        self.window.hidden = YES;
        self.window = nil;
    }];
}

///初始化显示的视图， 可以挪到具
- (void)setupSubviews:(UIWindow*)window
{
    ///随便写写
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:window.bounds];
    //和启动图一样，给用户造成错觉
    imageView.image = [UIImage createImageWithColor:[UIColor whiteColor]];
    imageView.contentMode=UIViewContentModeScaleAspectFill;
    
    [window addSubview:imageView];
}

#pragma mark -GADInterstitialDelegate
- (void)interstitialDidReceiveAd:(GADInterstitial *)ad
{//接收到插屏广告
    [self.interstitial presentFromRootViewController:AdViewController];
}

- (void)interstitial:(GADInterstitial *)ad didFailToReceiveAdWithError:(GADRequestError *)error
{//插屏广告请求失败
    [self hide];
}

/**********************/
- (void)interstitialWillPresentScreen:(GADInterstitial *)ad
{
    //插屏广告即将开始
    NSLog(@"插屏广告即将开始");
}

- (void)interstitialDidFailToPresentScreen:(GADInterstitial *)ad
{
    //插屏广告失败
    NSLog(@"插屏广告失败");
}

- (void)interstitialWillDismissScreen:(GADInterstitial *)ad
{
    //插屏广告即将消失
    NSLog(@"插屏广告即将消失");
    [self hide];
}

- (void)interstitialDidDismissScreen:(GADInterstitial *)interstitial
{
    //插屏广告已经消失
    NSLog(@"插屏广告已经消失");
    //self.interstitial = [self createAndLoadInterstitial];
}

- (void)interstitialWillLeaveApplication:(GADInterstitial *)ad{
    //插屏广告即将离开APP
    NSLog(@"插屏广告即将离开APP");
}

@end