ios – UIPageViewController并删除当前视图控制器

我设置UIPageViewController来前进和后退一些视图控制器.我有一个问题,当视图控制器添加到UIPageViewController时,内存使用量将增加,直到编译器给我收到内存警告,然后应用程序运行太慢,直到应用程序清空内存并再次正常工作.如何在不增加内存的情况下浏览视图控制器？或者更好地说当新的on添加时如何删除当前视图控制器.这是我的代码：

// Create the page view controller.
self.pageViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"PageViewController"];
self.pageViewController.dataSource = self;


//disabling tap and swipe guesture
for (UIGestureRecognizer *recognizer in self.pageViewController.gestureRecognizers) {
    recognizer.enabled = NO;
}


// Instantiate the first view controller.
UIViewController *startingViewController = [self viewControllerAtIndex:0];

[self.pageViewController setViewControllers:@[startingViewController]
                                  direction:UIPageViewControllerNavigationDirectionForward
                                   animated:NO
                                 completion:^(BOOL finished) {
                                     // Completion code
                                 }];

// Add the page view controller to this root view controller.
[self addChildViewController:self.pageViewController];
[self.view addSubview:self.pageViewController.view];
[self.pageViewController didMoveToParentViewController:self];

前进和后退行动：

- (void)goToPreviousContentViewController
{

    // Get index of current view controller
    UIViewController *currentViewController = [self.pageViewController.viewControllers objectAtIndex:0];
    NSString *vcRestorationID = currentViewController.restorationIdentifier;
    NSUInteger index = [self.contentPageRestorationIDs indexOfObject:vcRestorationID];

    UIViewController *previousViewController = [self viewControllerAtIndex:index - 1];



    [self.pageViewController setViewControllers:@[previousViewController]
                                      direction:UIPageViewControllerNavigationDirectionReverse
                                       animated:NO
                                     completion:^(BOOL finished) {
                                         // Completion code
                                     }];
}

更多代码：

#pragma mark - UIPageViewControllerDataSource
- (NSInteger)presentationCountForPageViewController:(UIPageViewController *)pageViewController
{
    return self.contentPageRestorationIDs.count;
}





- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController
{
    NSString *vcRestorationID = viewController.restorationIdentifier;
    NSUInteger index = [self.contentPageRestorationIDs indexOfObject:vcRestorationID];

    if (index == 0) {
        return nil;
    }

    return [self viewControllerAtIndex:index - 1];
}




- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController
{
    NSString *vcRestorationID = viewController.restorationIdentifier;
    NSUInteger index = [self.contentPageRestorationIDs indexOfObject:vcRestorationID];

    if (index == self.contentPageRestorationIDs.count - 1) {
        return nil;
    }

    return [self viewControllerAtIndex:index + 1];
}






#pragma mark - Private Methods
- (UIViewController *)viewControllerAtIndex:(NSUInteger)index
{
    // Only process a valid index request.
    if (index >= self.contentPageRestorationIDs.count) {
        return nil;
    }

    // Create a new view controller.
    BaseContentViewController *contentViewController = (BaseContentViewController *)[self.storyboard instantiateViewControllerWithIdentifier:self.contentPageRestorationIDs[index]];

    // Set any data needed by the VC here
    contentViewController.rootViewController = self;

    return contentViewController;
}

-(void)dealloc {
    NSLog(@"viewcontroller is being deallocated");
 }