ADMagazine/Classes/MagazinePage.m

/*
    File: MagazinePage.m
Abstract: Represents a page in the scroll view, which is either an image or an interstitial
 Version: 1.2
 
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*/
 
#import "MagazinePage.h"
#import <iAd/iAd.h>
 
@implementation MagazinePage
 
- (id)initWithContentsOfFile:(NSString *)path
{
    self = [super init];
    if (self != nil) {
        imagePath = [path copy];
        imageView = [[UIImageView alloc] init];
        imageView.contentMode = UIViewContentModeScaleAspectFit;
        imageView.backgroundColor = [UIColor blackColor];
        imageView.opaque = YES;
    }
    return self;
}
 
- (id)initWithInterstitialFrame:(CGRect)frame;
{
    self = [super init];
    if (self != nil) {
        interstitialContainer = [[UIView alloc] initWithFrame:frame];
    }
    return self;
}
 
- (void)dealloc
{
    [image release];
    [imagePath release];
    [imageView release];
    [interstitialContainer release];
    [super dealloc];
}
 
- (UIView *)pageView
{
    if (imageView != nil) {
        return imageView;
    }
    if (interstitialContainer != nil) {
        return interstitialContainer;
    }
    return nil;
}
 
// prepare ensures that this page is ready for the user to see
- (void)prepare
{
    // for an image view, preparing places the image in the image view.
    if (imageView != nil) {
        if (image == nil) {
            image = [[UIImage alloc] initWithContentsOfFile:imagePath];
        }
        imageView.image = image;
    }
    // nothing to do for an interstitial view.
}
 
// unprepare ensures that this page consumes as little memory as possible.
- (void)unprepare
{
    // for an image view, unpreparing removes the image from the image view.
    if (imageView != nil) {
        imageView.image = nil;
    }
    // nothing to do for an interstitial view.
}
 
- (void)purge
{
    // for an image view, purge its associated UIImage if it is not being used.
    if (imageView != nil) {
        if (imageView.image == nil) {
            [image release];
            image = nil;
        }
    }
    // nothing to do for an interstitial view.
}
 
@end