How to get the multiple selected CollectionViewCell from the UICollectionView? - ios

Question

I create a xib file and add a Collection View Cell. I add the progress bar in header file of cell like the following code.
#import <UIKit/UIKit.h>
#import "MobileVLCKit/VLCMediaThumbnailer.h"
#interface AITFileCell_grid : UICollectionViewCell <VLCMediaThumbnailerDelegate>
#property (strong, nonatomic) IBOutlet UIImageView *fileIcon;
#property (strong, nonatomic) IBOutlet UILabel *fileName;
#property (strong, nonatomic) IBOutlet UILabel *fileSize;
#property (strong, nonatomic) NSURL *filePath ;
+ (NSString *)reuseIdentifier ;
#end
#interface AITFileCell_grid()
{
BOOL fetching ;
#public
UIProgressView *dlProgress;
UILabel *dlProgressLabel;
}
#end
I also create another xib file and add the Collection View for loading Collection View Cell.
I want to selected multiple file and hide the progress bar on each cell by button.
But I can not get the cell when I click the delete button by following code.
- (IBAction) buttonCancel:(id)sender {
if(self.collectionView.indexPathsForSelectedItems > 0){
for(NSIndexPath *indexPath in self.collectionView.indexPathsForSelectedItems){
AITFileCell_grid *cell = [self.collectionView dequeueReusableCellWithReuseIdentifier:#"AITFileCell_grid" forIndexPath:indexPath];
//Hide the progress bar
cell->dlProgressLabel.text = #"0%";
cell->dlProgress.hidden = YES;
cell->dlProgressLabel.hidden = YES;
}
}
[self setEditing:NO animated:YES];
}
I set the breakpoint to the cell->dlProgressLabel.text = #"0%"; , it show the nil in the log...and the progress bar didn't change anything.
But I can set the value to cell->dlProgressLabel.text and set value to cell->dlProgress in NSTimer.
Why the cell define in the UIButton seems not be efficient ?...
Can someone help and teach me how to solve ?

Answer 1

You are dequeuing Cell by doing
AITFileCell_grid *cell = [self.collectionView dequeueReusableCellWithReuseIdentifier:#"AITFileCell_grid" forIndexPath:indexPath];
which could be different from what you have been selected, instead get the selected cell from the collectionView
AITFileCell_grid *cell = [self.collectionView cellForItemAtIndexPath: indexPath]