iOS录屏和截屏监听的实现代码

// This notification is posted after the user takes a screenshot (for example by pressing both the home and lock screen buttons)
UIKIT_EXTERN NSNotificationName const UIApplicationUserDidTakeScreenshotNotification NS_AVAILABLE_IOS(7_0);

-(void)viewDidAppear:(BOOL)animated{
  [super viewDidAppear:animated];
  
  [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(screenshots) name:UIApplicationUserDidTakeScreenshotNotification object:nil];
}

-(void)screenshots
{
  UIAlertView *alert1 = [[UIAlertView alloc] initWithTitle:nil message:@"[安全提醒]内含个人资金账户。不要截图，录制或分享给他人以保障资金账户安全。" delegate:nil cancelButtonTitle:nil otherButtonTitles:@"确定", nil];
  [alert1 show];

-(void)dealloc
{
  [[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationUserDidTakeScreenshotNotification object:nil];
}

-(void)viewWillAppear:(BOOL)animated{
  [super viewWillAppear:animated];

//监测当前设备是否处于录屏状态
  UIScreen * sc = [UIScreen mainScreen];
  if (@available(iOS 11.0, *)) {
    if (sc.isCaptured) {
      NSLog(@"正在录制~~~~~~~~~%d",sc.isCaptured);
      [self screenshots];
    }
  } else {
    // Fallback on earlier versions
  }
  if (@available(iOS 11.0, *)) {
//检测到当前设备录屏状态发生变化
    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(screenshots) name:UIScreenCapturedDidChangeNotification object:nil];
  } else {
    // Fallback on earlier versions
  }
}

-(void) screenshots
{
  UIAlertView *alert1 = [[UIAlertView alloc] initWithTitle:nil message:@"[安全提醒]内含个人资金账户。不要截图，录制或分享给他人以保障资金账户安全。" delegate:nil cancelButtonTitle:nil otherButtonTitles:@"确定", nil];
  [alert1 show];

-(void)dealloc
{
  if (@available(iOS 11.0, *)) {
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIScreenCapturedDidChangeNotification object:nil];
  } else {
    // Fallback on earlier versions
  }
}