Question

我创建了一个带有UICollectionView的图库，并从plist文件中加载了一组图像，当用户触摸每个单元格时，将加载一个全屏图像（与iPhone的照片应用程序相同），所以我遇到了有一个问题，即当照片将全屏时，我无法滚动和查看其他图像，这是我的代码：

然后在PhotosViewerController中：

-(void) creatContentWithNumerOfPage: (NSInteger) numberOfPage andCurrentPage: (NSInteger) currentPage andImageArray:(NSArray *)imageArray {

    self.pageControl.numberOfPages = numberOfPage;
    self.pageControl.currentPage = currentPage;
    [pageScrollView setContentSize:CGSizeMake(self.view.frame.size.width * pageControl.numberOfPages, self.view.frame.size.height)];
    pageScrollView.delegate = self;
    [self.view addSubview: pageScrollView];


    NSMutableArray *mArray = [[NSMutableArray alloc] initWithCapacity:thumbnailViewController.imageArray.count];
    for (int i = 0; i <= thumbnailViewController.imageArray.count; i++)
    {

        NSDictionary *picturesDictionary = [NSDictionary dictionaryWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Photos" ofType:@"plist"]];
        imageArray = [picturesDictionary objectForKey:@"PhotosArray"];

        fullScreen = [[UIImageView alloc]initWithImage:[UIImage imageNamed:[imageArray objectAtIndex:currentPage]]];
        [fullScreen setContentMode:UIViewContentModeScaleAspectFit];
        fullScreen.frame = self.view.frame;

        [mArray addObject:fullScreen];
        [pageScrollView addSubview:fullScreen];
    }

}

编辑:(解决方案）

-(void) creatContentWithImages:(NSArray*)imageArray andCurrentPage:(NSInteger)currentPage{

    self.pageControl.numberOfPages = imageArray.count;
    self.pageControl.currentPage = currentPage;
    [self.pageScrollView setContentSize:CGSizeMake(self.pageScrollView.frame.size.width * imageArray.count, self.pageScrollView.frame.size.height)];


    for (int i = 0; i < imageArray.count; i++)
    {


        NSDictionary *picturesDictionary = [NSDictionary dictionaryWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Photos" ofType:@"plist"]];
        imageArray = [picturesDictionary objectForKey:@"PhotosArray"];

        fullScreen = [[UIImageView alloc]initWithImage:[UIImage imageNamed:[imageArray objectAtIndex:i]]];


        [fullScreen setContentMode:UIViewContentModeScaleAspectFit];
        fullScreen.frame = CGRectMake(i*self.pageScrollView.frame.size.width, 0, self.pageScrollView.frame.size.width, self.pageScrollView.frame.size.height);

        [self.pageScrollView addSubview:fullScreen];
    }

    [self scrollToPage:currentPage animated:NO];

}

Answer 1

您的代码存在很多问题，例如

您在 creatContentWithImages方法之前致电viewDidLoad 并在此处我们不能指望self.view.frame或{的实际值 self.pageScrollView.frame，您必须在viewDidLoad之后/之后调用它。也许是这样的：

[self presentViewController:photosViewController animated:YES completion:^{ [photoViewController creatContentWithImages:images andCurrentPage:row]; }];

在周期中，您始终使用currentPage代替i ivar

您将imageArray发送到creatContentWithNumerOfPage方法，但是出于某种原因，这个数组在这里用新数据覆盖（I
假设有相同的数据）

还不清楚你为什么要执行[self.view addSubview: pageScrollView] - 是否以编程方式创建了UIScrollView？但它在哪个地方发生？

当您使用框架操作时，您应该使用UIScrollView框架，不是UIView，如果你的卷轴大小与UIView不同那么设计也将被打破。

我已经改变了它并改进了一些东西，所以让我们看一下（我发布了所有的PhotosViewerController.m文件）

#import "PhotosViewerController.h" @implementation PhotosViewerController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view from its nib. } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } -(void) creatContentWithImages:(NSArray*)imageArray andCurrentPage:(NSInteger)currentPage{ // I create UIScrollView programmatically, if you want to use xib then just remove lines with RM comment. // There are two views in xib hierarchy - UIScrollView downward and UIPageView above self.pageScrollView = [[UIScrollView alloc] initWithFrame:self.view.frame]; //RM self.pageScrollView.pagingEnabled = YES; //RM self.pageControl.numberOfPages = imageArray.count; self.pageControl.currentPage = currentPage; [self.pageScrollView setContentSize:CGSizeMake(self.pageScrollView.frame.size.width * imageArray.count, self.pageScrollView.frame.size.height)]; self.pageScrollView.delegate = self;//RM [self.view insertSubview:self.pageScrollView atIndex:0]; //RM for (int i = 0; i < imageArray.count; i++) //not <=, just < { UIImage *img = [imageArray objectAtIndex:i];// not sure whether imageArray contains UIImage's or NSString, so if here NSString the create UIImage in appropriate manner. I've tested it with UIImage's UIImageView *fullScreen = [[UIImageView alloc] initWithImage:img]; [fullScreen setContentMode:UIViewContentModeScaleAspectFit]; fullScreen.frame = CGRectMake(i*self.pageScrollView.frame.size.width, 0, self.pageScrollView.frame.size.width, self.pageScrollView.frame.size.height); [self.pageScrollView addSubview:fullScreen]; } [self scrollToPage:currentPage animated:NO]; // scroll to corresponding page } - (void)scrollViewDidScroll: (UIScrollView *) sView { CGFloat offset = self.pageScrollView.contentOffset.x; CGFloat pageSize = self.pageScrollView.frame.size.width; int page = floor((offset + (pageSize/2)) / pageSize); self.pageControl.currentPage = page; } - (IBAction)changeThePage:(id)sender { NSLog(@"Change"); [self scrollToPage:self.pageControl.currentPage animated:YES]; } - (void)scrollToPage:(NSInteger)page animated:(BOOL)animated{ CGRect pageRect = CGRectMake(page * self.pageScrollView.frame.size.width, 0, self.pageScrollView.frame.size.width, self.pageScrollView.frame.size.height); [self.pageScrollView scrollRectToVisible: pageRect animated: animated]; [self.pageControl setCurrentPage:page]; } @end

如果您还有任何疑问，请告诉我，我会尽力帮助您。

iOS - 从plist数据滚动图像

1 个答案: