/*

Copyright (C) 2013-2015 Apple Inc. All Rights Reserved.

See LICENSE.txt for this sample’s licensing information

Abstract:

A container view controller that manages an ADBannerView and a content view controller

*/

#import "BannerViewController.h"

NSString * const BannerViewActionWillBegin = @"BannerViewActionWillBegin";

NSString * const BannerViewActionDidFinish = @"BannerViewActionDidFinish";

@interface BannerViewController () <ADBannerViewDelegate>

@end

@implementation BannerViewController {

    ADBannerView *_bannerView;

    UIViewController *_contentController;

}

- (instancetype)initWithContentViewController:(UIViewController *)contentController

{

    // If contentController is nil, -loadView is going to throw an exception when it attempts to setup

    // containment of a nil view controller.  Instead, throw the exception here and make it obvious

    // what is wrong.

    NSAssert(contentController != nil, @"Attempting to initialize a BannerViewController with a nil contentController.");

    self = [super init];

    if (self != nil) {

        // On iOS 6 ADBannerView introduces a new initializer, use it when available.

        if ([ADBannerView instancesRespondToSelector:@selector(initWithAdType:)]) {

            _bannerView = [[ADBannerView alloc] initWithAdType:ADAdTypeBanner];

        } else {

            _bannerView = [[ADBannerView alloc] init];

        }

        _contentController = contentController;

        _bannerView.delegate = self;

    }

    return self;

}

- (void)loadView

{

    UIView *contentView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    [contentView addSubview:_bannerView];

    // Setup containment of the _contentController.

    [self addChildViewController:_contentController];

    [contentView addSubview:_contentController.view];

    [_contentController didMoveToParentViewController:self];

    self.view = contentView;

}

#if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_6_0

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{

    return [_contentController shouldAutorotateToInterfaceOrientation:interfaceOrientation];

}

#endif

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation

{

    return [_contentController preferredInterfaceOrientationForPresentation];

}

- (NSUInteger)supportedInterfaceOrientations

{

    return [_contentController supportedInterfaceOrientations];

}

- (void)viewDidLayoutSubviews

{

    // This method will be called whenever we receive a delegate callback

    // from the banner view.

    // (See the comments in -bannerViewDidLoadAd: and -bannerView:didFailToReceiveAdWithError:)

    CGRect contentFrame = self.view.bounds, bannerFrame = CGRectZero;

#if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_6_0

    // If configured to support iOS <6.0, then we need to set the currentContentSizeIdentifier in order to resize the banner properly.

    // This continues to work on iOS 6.0, so we won't need to do anything further to resize the banner.

    if (contentFrame.size.width < contentFrame.size.height) {

        _bannerView.currentContentSizeIdentifier = ADBannerContentSizeIdentifierPortrait;

    } else {

        _bannerView.currentContentSizeIdentifier = ADBannerContentSizeIdentifierLandscape;

    }

    bannerFrame = _bannerView.frame;

#else

    // If configured to support iOS >= 6.0 only, then we want to avoid currentContentSizeIdentifier as it is deprecated.

    // Fortunately all we need to do is ask the banner for a size that fits into the layout area we are using.

    // At this point in this method contentFrame=self.view.bounds, so we'll use that size for the layout.

    bannerFrame.size = [_bannerView sizeThatFits:contentFrame.size];

#endif

    // Check if the banner has an ad loaded and ready for display.  Move the banner off

    // screen if it does not have an ad.

    if (_bannerView.bannerLoaded) {

        contentFrame.size.height -= bannerFrame.size.height;

        bannerFrame.origin.y = contentFrame.size.height;

    } else {

        bannerFrame.origin.y = contentFrame.size.height;

    }

    _contentController.view.frame = contentFrame;

    _bannerView.frame = bannerFrame;

}

- (void)bannerViewDidLoadAd:(ADBannerView *)banner

{

    [UIView animateWithDuration:0.25 animations:^{

        // -viewDidLayoutSubviews will handle positioning the banner such that it is either visible

        // or hidden depending upon whether its bannerLoaded property is YES or NO (It will be

        // YES if -bannerViewDidLoadAd: was last called).  We just need our view

        // to (re)lay itself out so -viewDidLayoutSubviews will be called.

        // You must not call [self.view layoutSubviews] directly.  However, you can flag the view

        // as requiring layout...

        [self.view setNeedsLayout];

        // ...then ask it to lay itself out immediately if it is flagged as requiring layout...

        [self.view layoutIfNeeded];

        // ...which has the same effect.

    }];

}

- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error

{

    [UIView animateWithDuration:0.25 animations:^{

        // -viewDidLayoutSubviews will handle positioning the banner such that it is either visible

        // or hidden depending upon whether its bannerLoaded property is YES or NO (It will be

        // NO if -bannerView:didFailToReceiveAdWithError: was last called).  We just need our view

        // to (re)lay itself out so -viewDidLayoutSubviews will be called.

        // You must not call [self.view layoutSubviews] directly.  However, you can flag the view

        // as requiring layout...

        [self.view setNeedsLayout];

        // ...then ask it to lay itself out immediately if it is flagged as requiring layout...

        [self.view layoutIfNeeded];

        // ...which has the same effect.

    }];

}

- (BOOL)bannerViewActionShouldBegin:(ADBannerView *)banner willLeaveApplication:(BOOL)willLeave

{

    [[NSNotificationCenter defaultCenter] postNotificationName:BannerViewActionWillBegin object:self];

    return YES;

}

- (void)bannerViewActionDidFinish:(ADBannerView *)banner

{

    [[NSNotificationCenter defaultCenter] postNotificationName:BannerViewActionDidFinish object:self];

}

@end