Carousel index are not in order

问题

I have the following plist and I want to show images on order on the carousel. When I debug the code, I see index are not order.

When I am debugging, first it shows index = 0, then next item is index = 5

(lldb) po [items objectAtIndex:index];
http://charcoaldesign.co.uk/AsyncImageView/Forest/IMG_0351.JPG
(lldb) po [items objectAtIndex:index];
http://charcoaldesign.co.uk/AsyncImageView/Forest/IMG_0358.JPG

Here is the implementation:

- (void)awakeFromNib
{
    //set up data
    //your carousel should always be driven by an array of
    //data of some kind - don't store data in your item views
    //or the recycling mechanism will destroy your data once
    //your item views move off-screen

    //get image URLs
    NSString *plistPath = [[NSBundle mainBundle] pathForResource:@"Images" ofType:@"plist"];
    NSArray *imagePaths = [NSArray arrayWithContentsOfFile:plistPath];

    //remote image URLs
    NSMutableArray *URLs = [NSMutableArray array];
    for (NSString *path in imagePaths)
    {
        NSURL *URL = [NSURL URLWithString:path];
        if (URL)
        {
            [URLs addObject:URL];
        }
        else
        {
            NSLog(@"'%@' is not a valid URL", path);
        }
    }
    self.items = URLs;
}

- (void)dealloc
{
    //it's a good idea to set these to nil here to avoid
    //sending messages to a deallocated viewcontroller
    carousel.delegate = nil;
    carousel.dataSource = nil;
}

#pragma mark -
#pragma mark View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];

    //configure carousel
    carousel.type = iCarouselTypeCoverFlow2;
}

- (void)viewDidUnload
{
    [super viewDidUnload];

    //free up memory by releasing subviews
    self.carousel = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return YES;
}

#pragma mark -
#pragma mark iCarousel methods

- (NSInteger)numberOfItemsInCarousel:(iCarousel *)carousel
{
    //return the total number of items in the carousel
    return [items count];
}

- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSInteger)index reusingView:(UIView *)view
{
    //create new view if no view is available for recycling
    if (view == nil)
    {
        view = [[AsyncImageView alloc] initWithFrame:CGRectMake(0, 0, 200.0f, 200.0f)];
        view.contentMode = UIViewContentModeScaleAspectFit;
    }

    //cancel any previously loading images for this view
    [[AsyncImageLoader sharedLoader] cancelLoadingImagesForTarget:view];

    //set image URL. AsyncImageView class will then dynamically load the image
    ((AsyncImageView *)view).imageURL = [items objectAtIndex:index];

    return view;
}

if anyone wants to test, here is the github. then select and run Dynamic Downloads project

来源：https://stackoverflow.com/questions/43164687/carousel-index-are-not-in-order

标签

ios

objective-c

carousel

icarousel