ios - 如何获取indexpath值uiCollectionView iOS objective-c

Question

您好，我想获取索引路径的值以从点击的单元格的数组中获取数据，我该怎么做？

下面是我的 Collection View 方法，self.iname 是包含名称的数组，cat 是类别 ID 我必须将所选图像类别 ID 发送到下一页我无法提取它

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath

{


ColCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"cell" forIndexPath:indexPath];


if(self.iname!=0){

    [cell setTag:indexPath.row];    // set tag to the indexPath.row so we can access it later

//     add interactivity
    UITapGestureRecognizer * tap=[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onButtonTapped:)];

[tap setNumberOfTapsRequired:1];

   [cell addGestureRecognizer:tap];
 //   UITapGestureRecognizer *frameTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(frameTapGesture:)];
   // [cell.dimg addGestureRecognizer:frameTapGesture];

    NSString *fileName = [NSString stringWithFormat:@"%@",self.iname]; //objectAtIndex:indexPath];

    NSLog(@"%@",fileName);

    NSString *baseurl=[NSString stringWithFormat:@"http://test.kre8tives.com/barebon/upload/"];

    NSDictionary *dict = self.iname[indexPath.row];

    NSLog(@"%@", [self.iname objectAtIndex: indexPath.row]);

    NSString *paths = [NSString stringWithFormat:@"%@%@", baseurl, dict];

    NSLog(@"@@@@%@",paths);

    [NSURLConnection sendAsynchronousRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:paths]] queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {

        NSLog(@"%@",response);


        UIImage *imgage = [[UIImage alloc] initWithData:data];
        UIImageView *dimg = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,100,100)];
        dimg.clipsToBounds = YES;
        [cell.dimg setImage:imgage];


        if(cell.dimg==!nil)
        {
            NSLog(@"Not nil");
        }
        else{
            NSLog(@"nil");
        }
        if(cell.lbl==!nil)
        {
            NSLog(@"Not nil");
        }
        else{
            NSLog(@"nil");
        }

        cell.dimg.image=imgage;
        cell.lbl.text=[self.tempz objectAtIndex:indexPath.row];
        NSLog(@"%@",[self.iname objectAtIndex:indexPath.row]);

    }];
}
if(cell)
{
   // self.catid=[self.categoryid objectAtIndex:indexPath.row];
    //NSLog(@"%@",self.catid);
}
//if (cell.selected) {
 //   cell.backgroundColor = [UIColor blueColor]; // highlight selection
 // }
 // else
 // {
     // cell.backgroundColor = [UIColor redColor]; // Default color
 // }
  return cell;
}

这是我的点击手势方法

- (void)onButtonTapped:(UITapGestureRecognizer *)gestureRecognizer {
  //UIImageView *myImage = (UIImageView *)gestureRecognizer.view;
//    do stuff;
  self.catid=self.categoryid;

  NSLog(@"%@",self.catid);
   CGPoint tapPoint = [gestureRecognizer locationInView:gestureRecognizer.view];
  UIView *tappedView = [gestureRecognizer.view hitTest:tapPoint withEvent:nil];

  if ([tappedView isKindOfClass:[UILabel class]]) {
      NSLog(@"Found");
    }
   [self performSegueWithIdentifier:@"d2" sender:self];
  NSLog(@"it works");
 }

Answer 1

试试这个:

CGPoint position = [gestureRecognizer.view convertPoint:CGPointZero
                                   toView:self.collectionView];
NSIndexPath *tappedIndexPath = [self.collectionView indexPathForItemAtPoint:position];

或

 NSIndexPath *indexPath = [self.collectionView indexPathForItemAtPoint: tapPoint];