Change Images in UICollectionView after particular interval

Question

I have 6 cells in a UICollectionView.I would like to change the images in each UICollectionViewCell after a particular interval.How is it possible?

Do you want to change the image on each cell at once..or one at a time? — Bista, Dec 31 '15 at 06:52

score 2 · Answer 1 · edited Dec 29 '15 at 13:04

2

You can do it like this:

[NSTimer scheduledTimerWithTimeInterval:10.0f  
                                 target:self 
                               selector:@selector(updateImage:) 
                               userInfo:nil 
                                repeats:YES];

- (void)updateImage
{
     [yourImageview setImage:[UIImage imageWithName:@"image1"]];
     [yourCollectionView reloadData];
}

edited Dec 29 '15 at 13:04

Yunus Nedim Mehel

12,089
4
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answered Dec 29 '15 at 11:48

chirag bhalara

203
1
10

Can I do something using tag? – Akhil Jiji Jan 05 '16 at 09:16
*yes you can but collectionview reload is best way * Here is an example to find image view with tag for (UIImageView *imgView in collectionView.subviews) { if ([imgView isKindOfClass:[UIImageView class]]) { if(imgView.tag == 1//any tag which you want) [imgView setImage:[UIImage imageWithName:@"image1"]]; } } – chirag bhalara Jan 05 '16 at 09:48

score 0 · Answer 2 · answered Dec 29 '15 at 11:42

0

Reload the UICollectionView. It will call delegate methods of CollectionView & write your logic over there.

answered Dec 29 '15 at 11:42

Nilesh Patel

6,318
1
26
40

score 0 · Answer 3 · answered Dec 31 '15 at 06:11

//Write this to viewDidLoad

self.timer = [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(AutomaticScroll) userInfo:nil repeats:YES];

//Add this method to the class 

-(void)AutomaticScroll
{
    if (i<[imgArray count])
    {
        NSIndexPath *IndexPath = [NSIndexPath indexPathForRow:i inSection:0];
        [self.collectionView scrollToItemAtIndexPath:IndexPath
                                         atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:YES];
        i++;
        if (i==[imgArray count])
        {
            i=0;
        }
    }
}

score 0 · Answer 4 · edited May 23 '17 at 12:23

3 Steps:

Set a Timer
Shuffle Array
Refresh Collection View

Step 1 : Set a Timer

[NSTimer scheduledTimerWithTimeInterval:2.0f  
                             target:self 
                           selector:@selector(shuffleView:) 
                           userInfo:nil 
                            repeats:YES];

Step 2: Shuffle Array

Here I found a nice solution on how to shuffle the array using Category:

What's the Best Way to Shuffle an NSMutableArray?

Step 3: Reload Collection View

- (void)shuffleView
{
     [MyArray shuffle];
     [yourCollectionView reloadData];
}

Change Images in UICollectionView after particular interval

4 Answers4