ios - 我如何从 UICollectionView 传递我的 id

Question

当我单击 UICollectionView 中的按钮时，我想将我的食谱 ID 存储为 session ID。谁能给我解决方案。我将标签值设置为我的食谱 ID，但我不确定这是正确的方法。

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

[self.mySpinner stopAnimating];

static NSString *identifier = @"Cell";

UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];

UIButton *recipeid= (UIButton *)[cell.contentView viewWithTag:107];

[recipeid addTarget:self
                 action:@selector(aMethod:) forControlEvents:UIControlEventTouchUpInside];
[recipeid setTag:(int)[[array objectAtIndex:indexPath.row] valueForKey:@"RecID"]];



}


-(IBAction)aMethod:(UIButton *)sender
{

[[NSUserDefaults standardUserDefaults] setObject:sender forKey:[NSNumber numberWithInt:(@"RecipeIdsession",sender.tag)]];

[[NSUserDefaults standardUserDefaults] synchronize];
[self performSegueWithIdentifier:@"recipedetail" sender:nil];
 }

Answer 1

您可以像这样使用Button 的CGPoint 来获取IndexPath。

-(void)aMethod:(UIButton *)sender{
    CGPoint center= sender.center; 
    CGPoint point = [sender.superview convertPoint:center toView:self.collectionView];
    NSIndexPath *indexPath = [self.collectionView indexPathForItemAtPoint:point];
    NSInteger recid = [[array objectAtIndex:indexPath.row] valueForKey:@"RecID"];
}

注意:从 cellForItemAtIndexPath 中删除 setTag 行，无需设置标签。