memory-management - UIWebview で UIPageviewController を追加すると、iPad3 で予期しないメモリ クラッシュが発生しますが、iPad2 では完全に動作します

Question

私はiPadの電子ブックタイプのアプリケーションに取り組んでいます。Web サービスからデータを取得し、アプリケーションの開始時に webView に表示する必要があります。アプリケーションの開始時に、UIWebview を使用して UIViewController の配列を作成しています。

以下はそのためのコードです。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
 pageContent = [[NSMutableArray alloc] init];
 for (int i=0;i<60; i++)
 {

  [self addwebviewINCode];
 }
NSDictionary *options = [NSDictionary dictionaryWithObject:[NSNumber numberWithInteger:UIPageViewControllerSpineLocationMin] forKey: UIPageViewControllerOptionSpineLocationKey];
    self.pageController = [[UIPageViewController alloc] 
                           initWithTransitionStyle:UIPageViewControllerTransitionStylePageCurl
                           navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal
                           options: options];
    pageController.dataSource = self;
    pageController.delegate=self;
    [[pageController view] setFrame:[[self.window.rootViewController view] bounds]];
    UIViewController *viewC = [self viewControllerAtIndex:0];


NSArray *viewControllers =  [NSArray arrayWithObject:viewC];
[pageController setViewControllers:viewControllers  
                         direction:UIPageViewControllerNavigationDirectionForward 
                          animated:NO 
                        completion:nil];

[self.window.rootViewController addChildViewController:pageController];
[[self.window.rootViewController view] addSubview:[pageController view]];
[pageController didMoveToParentViewController:self.window.rootViewController];

[self.window makeKeyAndVisible];

return YES;


}

UIViewController で Webview を追加しています

-(void)addwebviewINCode
{
 UIViewController *viewC = [[UIViewController  alloc] initWithNibName:nil bundle:nil];


self.webVCustom = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, _window.bounds.size.width, 1004)];//20

self.webVCustom.suppressesIncrementalRendering=YES;
self.webVCustom.delegate=self;
self.webVCustom.scrollView.scrollEnabled=NO;

viewC.view=self.webVCustom;

[pageContent addObject:viewC];


}

UIPageController デリゲート メソッド

- (void)pageViewController:(UIPageViewController *)pageViewController willTransitionToViewControllers:(NSArray *)pendingViewControllers {
    pageAnimationFinished = YES;
}
- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
{
   if (flag == FALSE) {
        NSUInteger index = [self indexOfViewController:viewController];
        if ((index == 0) || (index == NSNotFound)) {
            return nil;
        }
        index--;
        return [self viewControllerAtIndex:index];
    }else {
        flag=FALSE;
    }
    return 0;
}
-(UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
   if (flag == FALSE) {
        NSUInteger index = [self indexOfViewController:viewController];
        if (index == NSNotFound) {
            return nil;
        }
        index++;
        if (index == [self.pageContent count]) {
            return nil;
        }
        return [self viewControllerAtIndex:index];
    }else {
        flag=FALSE;
    }
    return 0;
}


-(void)pageViewController:(UIPageViewController *)pageViewController didFinishAnimating:(BOOL)finished previousViewControllers:(NSArray *)previousViewControllers transitionCompleted:(BOOL)completed
{
    UIViewController *viewC = [previousViewControllers objectAtIndex:0];
    NSInteger ind = [self getVCIndex:viewC];
    NSInteger indCur = [self getVCIndex:[pageViewController.viewControllers objectAtIndex:0]];
    if (ind == indCur) {
        indCurrentView=ind;
    }else {
        indCurrentView=indCur;
    }
    if (completed || finished)   // Turn is either finished or aborted
        pageAnimationFinished = NO;
}

-(UIViewController *)viewControllerAtIndex:(NSUInteger)index
{
    // Return the data view controller for the given index.
    if ((index >= [self.pageContent count])) {
        return nil;
    }
    // Create a new view controller and pass suitable data.
    UIViewController viewC = (UIViewController)[pageContent objectAtIndex:index];

return viewC;


}

-(NSUInteger)indexOfViewController:(UIViewController *)viewController
{
    return [self.pageContent indexOfObject:viewController];
}

-(NSInteger)getVCIndex:(UIViewController*)viewCon
{
    if ([pageContent containsObject:viewCon]) {
        return [pageContent indexOfObject:viewCon];
    }
    return 0;
}

iPad2 では問題なく動作するが、iPad3 でのみメモリの警告とクラッシュが発生するため、このようなことが発生する理由

誰でもこの問題を解決するために私を助けることができますか? 私はこの問題を解決するのに何日も費やしました..

ありがとう