/* |
File: BannerViewController.m |
Abstract: A container view controller that manages an ADBannerView and a content view controller |
Version: 2.2 |
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*/ |
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#import "BannerViewController.h" |
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NSString * const BannerViewActionWillBegin = @"BannerViewActionWillBegin"; |
NSString * const BannerViewActionDidFinish = @"BannerViewActionDidFinish"; |
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@interface BannerViewController () |
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// This method is used by BannerViewSingletonController to inform instances of BannerViewController that the banner has loaded/unloaded. |
- (void)updateLayout; |
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@end |
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@interface BannerViewManager : NSObject <ADBannerViewDelegate> |
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@property (nonatomic, readonly) ADBannerView *bannerView; |
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+ (BannerViewManager *)sharedInstance; |
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- (void)addBannerViewController:(BannerViewController *)controller; |
- (void)removeBannerViewController:(BannerViewController *)controller; |
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@end |
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@implementation BannerViewController { |
UIViewController *_contentController; |
} |
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- (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."); |
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self = [super init]; |
if (self != nil) { |
_contentController = contentController; |
[[BannerViewManager sharedInstance] addBannerViewController:self]; |
} |
return self; |
} |
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- (void)dealloc |
{ |
[[BannerViewManager sharedInstance] removeBannerViewController:self]; |
} |
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- (void)loadView |
{ |
UIView *contentView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; |
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// Setup containment of the _contentController. |
[self addChildViewController:_contentController]; |
[contentView addSubview:_contentController.view]; |
[_contentController didMoveToParentViewController:self]; |
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self.view = contentView; |
} |
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#if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_6_0 |
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation |
{ |
return [_contentController shouldAutorotateToInterfaceOrientation:interfaceOrientation]; |
} |
#endif |
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- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation |
{ |
return [_contentController preferredInterfaceOrientationForPresentation]; |
} |
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- (NSUInteger)supportedInterfaceOrientations |
{ |
return [_contentController supportedInterfaceOrientations]; |
} |
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- (void)viewDidLayoutSubviews |
{ |
CGRect contentFrame = self.view.bounds, bannerFrame = CGRectZero; |
ADBannerView *bannerView = [BannerViewManager sharedInstance].bannerView; |
#if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_6_0 |
NSString *contentSizeIdentifier; |
// 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) { |
contentSizeIdentifier = ADBannerContentSizeIdentifierPortrait; |
} else { |
contentSizeIdentifier = ADBannerContentSizeIdentifierLandscape; |
} |
bannerFrame.size = [ADBannerView sizeFromBannerContentSizeIdentifier:contentSizeIdentifier]; |
#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 |
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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; |
// We only want to modify the banner view itself if this view controller is actually visible to the user. |
// This prevents us from modifying it while it is being displayed elsewhere. |
if (self.isViewLoaded && (self.view.window != nil)) { |
[self.view addSubview:bannerView]; |
bannerView.frame = bannerFrame; |
#if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_6_0 |
bannerView.currentContentSizeIdentifier = contentSizeIdentifier; |
#endif |
} |
} |
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- (void)updateLayout |
{ |
[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. 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. |
}]; |
} |
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- (void)viewWillAppear:(BOOL)animated |
{ |
[super viewWillAppear:animated]; |
[self.view addSubview:[BannerViewManager sharedInstance].bannerView]; |
} |
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- (NSString *)title |
{ |
return _contentController.title; |
} |
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@end |
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@implementation BannerViewManager { |
ADBannerView *_bannerView; |
NSMutableSet *_bannerViewControllers; |
} |
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+ (BannerViewManager *)sharedInstance |
{ |
static BannerViewManager *sharedInstance = nil; |
static dispatch_once_t onceToken; |
dispatch_once(&onceToken, ^{ |
sharedInstance = [[BannerViewManager alloc] init]; |
}); |
return sharedInstance; |
} |
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- (instancetype)init |
{ |
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]; |
} |
_bannerView.delegate = self; |
_bannerViewControllers = [[NSMutableSet alloc] init]; |
} |
return self; |
} |
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- (void)addBannerViewController:(BannerViewController *)controller |
{ |
[_bannerViewControllers addObject:controller]; |
} |
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- (void)removeBannerViewController:(BannerViewController *)controller |
{ |
[_bannerViewControllers removeObject:controller]; |
} |
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- (void)bannerViewDidLoadAd:(ADBannerView *)banner |
{ |
for (BannerViewController *bvc in _bannerViewControllers) { |
[bvc updateLayout]; |
} |
} |
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- (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error |
{ |
for (BannerViewController *bvc in _bannerViewControllers) { |
[bvc updateLayout]; |
} |
} |
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- (BOOL)bannerViewActionShouldBegin:(ADBannerView *)banner willLeaveApplication:(BOOL)willLeave |
{ |
[[NSNotificationCenter defaultCenter] postNotificationName:BannerViewActionWillBegin object:self]; |
return YES; |
} |
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- (void)bannerViewActionDidFinish:(ADBannerView *)banner |
{ |
[[NSNotificationCenter defaultCenter] postNotificationName:BannerViewActionDidFinish object:self]; |
} |
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@end |