在简单的uipageviewcontroller应用中接收内存警告

Question

我有一个基于默认页面的uipageviewcontroller应用程序，该应用程序可以作为xcode 7.1中的起点使用

我的数据控制器如下所示：

@interface DataViewController ()
@property (weak, nonatomic) IBOutlet UITextView *descTextView;
@property (weak, nonatomic) IBOutlet UIView *backgroundView;
@property (weak, nonatomic) IBOutlet UIImageView *backgroundImage;
@property (weak, nonatomic) IBOutlet UILabel *titleLabel;
@property (weak, nonatomic) IBOutlet UIBarButtonItem *startAgainButton;
- (IBAction)settingsButtonPressed:(id)sender;
- (IBAction)startAgainButtonPressed:(id)sender;

@end

@implementation DataViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.dataLabel.text = [self.dataObject title];
    self.backgroundImage.image =  [UIImage imageNamed:[self.dataObject imageName]];
    self.descTextView.text = [self.dataObject desc];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];

}

我的模型控制器如下所示：

@interface ModelController ()

@property (readonly, strong, nonatomic) NSArray *pageData;
@end

@implementation ModelController

- (instancetype)init {
    self = [super init];
    if (self) {

        _pageData = [self loadPageData];

    }
    return self;
}

- (NSArray *)loadPageData{
    //255 173 80
    NewsPoint *newspoint1 = [[NewsPoint alloc] init];
    newspoint1.title = @"my title";
    newspoint1.tintCode = @" ";
    newspoint1.imageName = @"news";
    newspoint1.desc = @"my desc"

return [[NSArray alloc] initWithObjects:newspoint1, newspoint2, newspoint3, newspoint4, newspoint5, newspoint6, newspoint7, nil];
}

收到内存警告时，我的应用程序无响应，无法再在视图之间滑动。 我究竟做错了什么？

Answer 1

您的应用程序可能会收到内存警告，因为您在启动时实例化了所有ViewController。

您不应将viewControllers存储在NSArray中，而应仅在需要时实例化它们。

看看这个答案： 释放UIPageViewController中未使用的页面