ios - 保存UICollectionView的索引路径以在ActionSheet中使用

Question

我在使用indexPath的UICollectionView中使用一个数组，并且我想在ActionSheet中使用具有相同indexPath的相同数组。是否可以通过任何方式保存indexPath并将其加载到actionSheet中？

这是我正在使用的代码(当然，我在操作表中使用了更多代码，并且可能可以正常工作，我只是将代码附加到出现问题的地方):

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
    UILabel *label = (UILabel *)[cell viewWithTag:100];
    UIImageView *favoriteImage = (UIImageView *)[cell viewWithTag:750];
  //  UIImageView *image = (UIImageView *)[cell viewWithTag:500];

    //Sound title
    label.text = [mainArray objectAtIndex:indexPath.row];

    //Single sound image
   // image.image = [UIImage imageNamed: [NSString stringWithFormat:@"%@.png", [array objectAtIndex:indexPath.row]]];

    // Removes background color in cells
    cell.backgroundColor = [UIColor colorWithRed:190.0/255 green:179.0/255 blue:59.0/255 alpha:0.0];



        if ([FavoriteArray containsObject: [mainArray objectAtIndex:indexPath.row]])
        {
            favoriteImage.alpha = 1;
        }




    return cell;
}

- (void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    //Get the name of the current pressed button
    NSString *buttonTitle = [actionSheet buttonTitleAtIndex:buttonIndex];
    if  ([buttonTitle isEqualToString:@"Destructive Button"]) {
        if (self.favoriteAcitve == YES) {


            if ([FavoriteArray containsObject: [mainArray objectAtIndex:indexPath.row]]) // YES
            {
                [FavoriteArray removeObject:[mainArray objectAtIndex:indexPath.row]];
                [FavoriteArray writeToFile:listPath atomically:YES];

            } else {
                [FavoriteArray addObject:[mainArray objectAtIndex:indexPath.row]];
                [FavoriteArray writeToFile:listPath atomically:YES];
                NSLog(@"Count %i", [FavoriteArray count]);

          //  }}

        NSLog(@"Destructive pressed --> Delete Something");
    }
    if ([buttonTitle isEqualToString:@"Other Button 1"]) {
        NSLog(@"Other 1 pressed");
    }
    if ([buttonTitle isEqualToString:@"Other Button 2"]) {
        NSLog(@"Other 2 pressed");
    }
    if ([buttonTitle isEqualToString:@"Other Button 3"]) {
        NSLog(@"Other 3 pressed");
    }
    if ([buttonTitle isEqualToString:@"Cancel Button"]) {
        NSLog(@"Cancel pressed --> Cancel ActionSheet");
    }
}

Answer 1

如果要存储变量，请尝试以下操作:

使用NSUserDefaults，代码如下所示:

存储索引路径:

[[NSUserDefaults standardUserDefaults] setObject:indexPath.row forKey:@"nameForStoredVariableHere_row"];
[[NSUserDefaults standardUserDefaults] setObject:indexPath.sectionforKey:@"nameForStoredVariableHere_section"];

[[NSUserDefaults standardUserDefaults] synchronize];

检索存储的索引路径:

 NSNumber *storedRow = [[NSUserDefaults standardUserDefaults] objectForKey:@"nameForStoredVariableHere_row"];
 NSNumber *storedSection = [[NSUserDefaults standardUserDefaults] objectForKey:@"nameForStoredVariableHere_section"];

之后，您可以随意使用indexPath