Question

我将Xcode更新为9并使用iOS 11作为Base SDK。不知何故，当我这样做时，事情发生了变化。从那时起，我的应用程序中的集合视图没有显示。 NSLog永远不会在控制台中显示部分中的项目数，当我为cellForItem输入NSLog时，NSLog永远不会在控制台中触发任何内容。在XIB中，所有内容都正确连接，同样，这适用于AppStore中已存在的应用程序，除了下载新的Xcode之外，我在代码中没有更改任何内容。世界上到底发生了什么？这是代码：

 - (void)viewWillAppear:(BOOL)animated
    {
        [super viewWillAppear:animated];

        NSIndexPath *selectedIndexPath = [self.tableView indexPathForSelectedRow];
        [self.tableView deselectRowAtIndexPath:selectedIndexPath animated:YES];

    }

    - (void)viewDidLoad
{

    [super viewDidLoad];

     arryData = [[NSArray alloc] initWithObjects:@"AIMCON", @"Devotional Songs", @"Saved Devotionals", @"AIM Series 2017", @"Resources", @"Podcasts", @"Website", @"Links",  nil];
    CALayer * l = [viewofimage layer];
    [l setMasksToBounds:YES];
    [l setCornerRadius:11];
    [l setBorderWidth:2.0];
    [l setBorderColor:[[UIColor blackColor] CGColor]];
    tableView.contentInset = UIEdgeInsetsMake(0, 0, 0, 0);


        [self.collectionView registerClass:[CVCell class] forCellWithReuseIdentifier:@"cvCell"];

        self.collectionView.backgroundColor = [UIColor whiteColor];


    self.collectionView.delegate = self;

    // Do any additional setup after loading the view.
}





    -(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
        return 1;
        NSLog(@"1");
    }
    -(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
        return [arryData count];
        NSLog(@"2");
    }

    -(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
        NSLog(@"Selected");
        if (indexPath.row == 1) {
            DevoSongs *dvController = [[DevoSongs alloc] initWithNibName:@"DevoSongs" bundle:[NSBundle mainBundle]];

            [self.navigationController pushViewController:dvController animated:YES];
            [dvController release];
        }
        if (indexPath.row == 2) {
            ListOfDevos *dvController7 = [[ListOfDevos alloc] initWithNibName:@"ListOfDevos" bundle:[NSBundle mainBundle]];

            [self.navigationController pushViewController:dvController7 animated:YES];
            [dvController7 release];

        }
        if (indexPath.row == 4) {
            AIMProject *dvController7 = [[AIMProject alloc] initWithNibName:@"AIMProject" bundle:[NSBundle mainBundle]];

            [self.navigationController pushViewController:dvController7 animated:YES];
            [dvController7 release];

        }
        if (indexPath.row == 5) {
            Podcasts *dvController2 = [[Podcasts alloc] initWithNibName:@"Podcasts" bundle:[NSBundle mainBundle]];

            [self.navigationController pushViewController:dvController2 animated:YES];
            [dvController2 release];

        }
        if (indexPath.row == 6) {
            FamilyMinistry *dvController5 = [[FamilyMinistry alloc] initWithNibName:@"FamilyMinistry" bundle:[NSBundle mainBundle]];

            [self.navigationController pushViewController:dvController5 animated:YES];
            [dvController5 release];

        }
        if (indexPath.row == 7) {
            LinksViewController *dvController6 = [[LinksViewController alloc] initWithNibName:@"LinksViewController" bundle:[NSBundle mainBundle]];

            [self.navigationController pushViewController:dvController6 animated:YES];
            [dvController6 release];
        }

        if (indexPath.row == 0) {
            NSLog(@"TABLE");
            SECTable *dvController7 = [[SECTable alloc] initWithNibName:@"SECTable" bundle:[NSBundle mainBundle]];
            [self.navigationController pushViewController:dvController7 animated:YES];
            [dvController7 release];
        }
        if (indexPath.row == 3) {
            NSLog(@"AIM Series");
            AIMSeries *dvController9 = [[AIMSeries alloc] initWithNibName:@"AIMSeries" bundle:[NSBundle mainBundle]];

            [self.navigationController pushViewController:dvController9 animated:YES];
            [dvController9 release];
        }

    }
    -(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {



        static NSString *cellIdentifier = @"cvCell";

        CVCell *cell = (CVCell *)[collectionView dequeueReusableCellWithReuseIdentifier:cellIdentifier forIndexPath:indexPath];


        NSString *thearticleImage = [[arryData objectAtIndex:indexPath.row] stringByAppendingString:@".png"];
        [cell.theimage setImage:[UIImage imageNamed:thearticleImage]];
        //titleLabel2.text = entry.articleTitle;

        CALayer * l = [cell.theimage layer];
        [l setMasksToBounds:YES];
         [l setCornerRadius:11];
        [l setBorderWidth:2.0];
        [cell.labels setText:[arryData objectAtIndex:indexPath.row]];

        NSLog(@"%@", cell.labels.text);




        return cell;
    }

    @end

这里的区别在于它的工作时间到现在，我所做的只是更新Xcode。之前：后：

Answer 1

将集合视图的isPrefetchingEnabled属性设置为false。

UICollectionView无法加载

1 个答案: