问Admob智能横幅广告不更新设备旋转

EN

- (void)viewDidLoad {
    [super viewDidLoad];
    self.gadBannerView = [[GADBannerView alloc] initWithAdSize:kGADAdSizeSmartBannerPortrait];
    self.gadBannerView.adUnitID = @"myBannerID";
    self.gadBannerView.rootViewController = self;
    [self.gadBannerView loadRequest:[GADRequest request]];
    [self.view addSubview:self.gadBannerView];
}

- (void)viewDidLayoutSubviews {
    if (self.view.bounds.size.width < self.view.bounds.size.height) {
        // portrait orientation
        self.gadBannerView.adSize = kGADAdSizeSmartBannerPortrait;
        NSLog(@"portrait banner size: %@",NSStringFromCGRect(self.gadBannerView.frame));
    } else {
        // landscape orientation
        self.gadBannerView.adSize = kGADAdSizeSmartBannerLandscape;
        NSLog(@"landscape banner size: %@",NSStringFromCGRect(self.gadBannerView.frame));
    }
}