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調用委托方法UICollectionViewCell

[英]Calling delegate method UICollectionViewCell

我在調用駐留在我的UICollectionViewCell中的委托方法時遇到麻煩...

在我的FOFPhotoCell.mi中,具有以下代碼:

    -(void)fadeOutLabels
{
    NSLog(@"fadeOutLabels was called");
    [UIView animateWithDuration:1.0
                          delay:0.0  /* do not add a delay because we will use performSelector. */
                        options:UIViewAnimationOptionCurveEaseIn
                     animations:^ {
                         self.titleLabel.alpha = 0.0;
                     }
                     completion:^(BOOL finished) {
                         [self.titleLabel removeFromSuperview];

                     }];

}

在FOFPhotoCell.h中,定義如下:

@protocol FOFPhotoCellDelegate <NSObject>

@required
-(void)fadeOutLabels;

@end


@interface FOFPhotoCell : UICollectionViewCell {
    id delegate;
}


@property (nonatomic, weak) id<FOFPhotoCellDelegate> delegate;

在我的FOFPhotosViewController.h中:

@interface FOFPhotosViewController : UICollectionViewController <FOFPhotoCellDelegate>


@end

最后是我的FOFPhotosViewController.m:

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    FOFPhotoCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"photo" forIndexPath:indexPath];

    NSArray *photosArray = [self.dishes valueForKeyPath:@"avatar_url"];
    NSArray *nameArray = [self.dishes valueForKeyPath:@"name"];


//    NSLog(@"photoURL %@", _responseDictionary);
    cell.backgroundColor = [UIColor lightGrayColor];
    [cell.imageView setImageWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"****",[photosArray objectAtIndex: indexPath.row]]]];
    cell.titleLabel.text = [NSString stringWithFormat:@"%@", [nameArray objectAtIndex:indexPath.row]];




    UILongPressGestureRecognizer *tapAndHold = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(fadeOutLabels)];

    tapAndHold.minimumPressDuration = 0.5;
    [self.collectionView addGestureRecognizer:tapAndHold];



    [self.collectionView reloadItemsAtIndexPaths:[NSArray arrayWithObject:indexPath]];

    return cell;
}

但是,這會使應用程序崩潰: -[FOFPhotosViewController fadeOutLabels]: unrecognized selector sent to instance

我似乎無法弄清楚這一點,因此,我將非常感謝您的幫助! 讓我知道是否需要更多代碼。

提前感謝克里斯

fadeOutLables是單元格的一種方法,而不是視圖控制器的一種方法。

錯誤消息是正確的。

假設其他一切都正確,請按如下所示更改此行:

UILongPressGestureRecognizer *tapAndHold = [[UILongPressGestureRecognizer alloc] initWithTarget:cell action:@selector(fadeOutLabels)];

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