從選擇器視圖的選擇的值顯示給集合視圖的小區

Question

here when i define a cell ,,then in picker it did not recognize and always be 0. so the label always be empty.OR rather then when i update my collection view then all element(9 element)of cell has been updated with selected value.now what i do for select a particular cell's label value and where i am wrong ?

我有包含具有標籤和button.when標籤的的CollectionView細胞的particularlabel我點擊該按鈕選擇器視圖開我選擇了一個值選擇行。現在我想更新我的特定單元格的標籤與選定的值，但所有單元格的標籤已更新。當我從選擇器中選擇一個值時，我如何更新我的單個標籤。

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

{ 
UICollectionViewCell *cell ; 
    static NSString *identifier = @"Cell"; 

{ 


    cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier   forIndexPath:0]; 

    NSURL *urlImage = [NSURL URLWithString:[NSString stringWithFormat:@"%@%@",APIImageURL, [[infoArray objectAtIndex:indexPath.row] valueForKey:@"product_image"]]]; 

    RemoteImageView *productImageView = (UIImageView *)[cell viewWithTag:100]; 
    productImageView .imageURL = urlImage; 

    UILabel *lblProductName = (UILabel *)[cell viewWithTag:101]; 
    [lblProductName setText:[[infoArray objectAtIndex:indexPath.row] valueForKey:@"product_name"]]; 


    NSArray *arrayProductQuantity =[[infoArray objectAtIndex:indexPath.row] valueForKey:@"product_qty"]; 
    for (NSDictionary *dicQuantity in arrayProductQuantity) 
    { 

     NSLog(@"quantity_name %@",[dicQuantity valueForKey:@"quantity_name"]); 
     if([arrayProductQuantity objectAtIndex:0]) 
     { 
      NSString*prodctPrice =[[infoArray objectAtIndex:indexPath.row] valueForKey:@"product_price"]; 
      float value = [prodctPrice intValue]; 
      NSString* qntyValue =[dicQuantity valueForKey:@"value"]; 
      float quntyValueInt=[qntyValue intValue]; 
     if([qntyValue isEqual:@"1000"]) 
      { 
      value=(value/1000*quntyValueInt); 
       float roundedValue = round(2.0f * value)/2.0f; 
       NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init]; 
       [formatter setMaximumFractionDigits:1]; 
       [formatter setRoundingMode: NSNumberFormatterRoundDown]; 

       NSString *numberString = [formatter stringFromNumber:[NSNumber numberWithFloat:roundedValue]]; 

       UILabel *lblProductprice = (UILabel *)[cell viewWithTag:102]; 
       [lblProductprice setText:numberString]; 

       UILabel *lblProductQuantity = (UILabel *)[cell viewWithTag:103]; 
       lblProductQuantity.text = [dicQuantity valueForKey:@"quantity_name"] ; 

       UILabel *selectedCategory = (UILabel *)[cell viewWithTag:604]; 
       selectedCategory.text = lblRow.text; 

      } 
     else 
      { 
       value=ceil(value/1000*quntyValueInt); 
       float roundedValue = round(2.0f * value)/2.0f; 
       NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init]; 
       [formatter setMaximumFractionDigits:1]; 
       [formatter setRoundingMode: NSNumberFormatterRoundDown]; 

       NSString *numberString = [formatter stringFromNumber:[NSNumber numberWithFloat:roundedValue]]; 

       UILabel *lblProductprice = (UILabel *)[cell viewWithTag:102]; 
       [lblProductprice setText:numberString]; 


       lblProductQuantity = (UILabel *)[cell viewWithTag:103]; 
       lblProductQuantity.text = [dicQuantity valueForKey:@"quantity_name"] ; 

      } 

      } 
} 
    } 

    return cell; 

}  

     -(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath 
    { 

    detailViewController* myvc1 = [self.storyboard 
    instantiateViewControllerWithIdentifier:@"detailViewController"]; 

    myvc1.cat_dict=[infoArray objectAtIndex:indexPath.row]; 
     myvc1.fromVC = @"product"; 
     [self.navigationController pushViewController:myvc1 animated:true]; 
     } 
    #pragma mark picker for choose quntity 

    -(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView 
    { 
     return 1; 
    } 

    -(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component 
    { 
     return [array_picker count]; 
    } 

** -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component 
    { 
     NSLog(@"You selected this: %@", [array_picker objectAtIndex: row]); 

     UILabel *selectedCategory = (UILabel *)[cell viewWithTag:604]; 
     selectedCategory.text = lblRow.text; 


    } ** 

Answer 1

添加這些屬性

@property (nonatomic, assign) NSInteger selectedIndex; @property (weak, nonatomic) IBOutlet UICollectionView *collectionView;

在的cellForRowAtIndexPath方法中添加這些代碼

cell.button.tag = indexPath.row; [cell.button addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];

添加新的方法buttonClick：

- (IBAction)buttonClick:(UIButton *)sender{ 
self.selectedIndex = sender.tag; 

// Show pickerview 

}

裏面添加這些代碼(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component

SampleCollectionViewCell *cell = (SampleCollectionViewCell *) [self.collectionView cellForItemAtIndexPath:[NSIndexPath indexPathForRow:self.selectedIndex inSection:0]]; // Assuming you have only single section 
cell.label.text = lblRow.text;