CODEWITHSUNDEEP
uitableview
Santiago
Santiago

Reputation: 2102

custom UITableViewCell subclass not able to get properties assigned

I am trying to build my image picker through the ALAssets library and I have a table view with the albums but when i click on the album to view the photos, in a dynamic UITableViewController composed of custom UITableViewCells it doesnt allow me to assign properties to my custom AlbumContentTableViewCells...

Both cell.rowNumber & indexPath.row are NSIntegers but its complaining about an unrecognized selector...

// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

AlbumContentsTableViewCell *cell = [[AlbumContentsTableViewCell alloc] init];

cell = (AlbumContentsTableViewCell*)[tableView dequeueReusableCellWithIdentifier:@"Photo"];

cell.rowNumber = indexPath.row;
cell.selectionDelegate = self;

// Configure the cell...
NSUInteger firstPhotoInCell = indexPath.row * 4;
NSUInteger lastPhotoInCell  = firstPhotoInCell + 4;

if (assets.count <= firstPhotoInCell) {
    NSLog(@"We are out of range, asking to start with photo %d but we only have %d", firstPhotoInCell, assets.count);
    return nil;
}

NSUInteger currentPhotoIndex = 0;
NSUInteger lastPhotoIndex = MIN(lastPhotoInCell, assets.count);
for ( ; firstPhotoInCell + currentPhotoIndex < lastPhotoIndex ; currentPhotoIndex++) {

    ALAsset *asset = [assets objectAtIndex:firstPhotoInCell + currentPhotoIndex];
    CGImageRef thumbnailImageRef = [asset thumbnail];
    UIImage *thumbnail = [UIImage imageWithCGImage:thumbnailImageRef];

    switch (currentPhotoIndex) {
        case 0:
            [cell photo1].image = thumbnail;
            break;
        case 1:
            [cell photo2].image = thumbnail;
            break;
        case 2:
            [cell photo3].image = thumbnail;
            break;
        case 3:
            [cell photo4].image = thumbnail;
            break;
        default:
            break;
    }
}

return cell;

}

I get this error when I try to assign this custom UITableCell its 'rowNumber' property:

'NSInvalidArgumentException', reason: '-[UITableViewCell setRowNumber:]: unrecognized selector sent to instance 0x1e2a43a0'

AlbumContentsTableViewCell.h 

#import <UIKit/UIKit.h>

#import "ThumbnailImageView.h"

@class AlbumContentsTableViewCell;

@protocol AlbumContentsTableViewCellSelectionDelegate <NSObject>
- (void)albumContentsTableViewCell:(AlbumContentsTableViewCell *)cell selectedPhotoAtIndex:(NSUInteger)index;
@end

@interface AlbumContentsTableViewCell : UITableViewCell <ThumbnailImageViewSelectionDelegate> {

IBOutlet ThumbnailImageView *photo1;
IBOutlet ThumbnailImageView *photo2;
IBOutlet ThumbnailImageView *photo3;
IBOutlet ThumbnailImageView *photo4;

NSInteger rowNumber;
//id <AlbumContentsTableViewCellSelectionDelegate> selectionDelegate;
}

@property (nonatomic) NSInteger rowNumber;
@property (nonatomic, weak) id<AlbumContentsTableViewCellSelectionDelegate> selectionDelegate;

- (UIImageView *)photo1;
- (UIImageView *)photo2;
- (UIImageView *)photo3;
- (UIImageView *)photo4;

- (void)clearSelection;
@end

AlbumContentsTableViewCell.m

#import "AlbumContentsTableViewCell.h"
#import "ThumbnailImageView.h"

@implementation AlbumContentsTableViewCell

@synthesize rowNumber;
@synthesize selectionDelegate;

story board

story board

 #import <UIKit/UIKit.h>

@class ThumbnailImageView;

@protocol ThumbnailImageViewSelectionDelegate <NSObject>
- (void)thumbnailImageViewWasSelected:(ThumbnailImageView *)thumbnailImageView;
@end

@interface ThumbnailImageView : UIImageView {

UIImageView *highlightView;
id <ThumbnailImageViewSelectionDelegate> delegate;
}

@property(nonatomic, assign) id<ThumbnailImageViewSelectionDelegate> delegate;

- (void)clearSelection;
@end

Upvotes: 0

Views: 218

Answers (1)

Jake Spencer
Jake Spencer

Reputation: 1127

It looks like when you are calling

[tableView dequeueReusableCellWithIdentifier:@"Photo"];

It is dequeuing a UITableViewCell and not an AlbumContentsTableViewCell. Since UITableViewCell does not have a setRowNumber: selector it is throwing an exception. You need to be allocating and initing your AlbumContentsTableViewCells somewhere.

EDIT:
You need to register your AlbumContentsTableViewCell for use with your @"Photo" identifier. Try adding this to your `viewDidLoad' method:

    [self.tableView registerClass:[AlbumContentsTableViewCell class] forCellReuseIdentifier:@"Photo"];

Note that I haven't tested this code out, but I think it is close to what you need.

Upvotes: 1

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