iPhone：如何在tabelview中为自定义单元格进行多项选择？ [英] iPhone: How to allow multiple selection in tabelview for a custom cell?

问题描述

我如何调整它以便能够进行多项选择？并获得所选的

How can I adapt this to be able to make multiple selections? and get the selected ones

- (id)initWithCellIdentifier:(NSString *)cellID {
if ((self = [super initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellID])) {

    UITableViewCell *cell=self; 
            UIImage *cry = [UIImage APP_CRYSTAL_SELECT];
    self.leftImage = [[[UIImageView alloc] initWithImage:cry] autorelease] ;
            [self.contentView addSubview:leftImage];            
}

所选方法是：

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];
      if(selected)
      {
       NSArray *subviews=[self.contentView subviews];
        for(UIView* view in subviews){
          if([view isEqual:self.leftImage]){
             [self.leftImage setHighlightedImage:[UIImage APP_CRYSTAL_SELECTED]];
        }
    }
}
else
{       
    NSArray *subviews=[self.contentView subviews];
    for(UIView* view in subviews){
        if([view isEqual:self.leftImage]){
            [self.leftImage setHighlightedImage:[UIImage APP_CRYSTAL_SELECT]];
        }
    }
  }
}

推荐答案

对于多重选择，请设置NSMutableArray ivar（在本例中为selectedIndexPaths）以保存所选项目。在 didSelectRowAtIndexPath 为此数组添加或删除indexPath。

For multiple selection, setup an NSMutableArray ivar (selectedIndexPaths in this case) to hold the items that are selected. In didSelectRowAtIndexPath add or remove indexPaths to this array.

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{   
        if(![self.selectedIndexPaths containsObject:indexPath])
            [self.selectedIndexPaths addObject:indexPath];
        else
            [self.selectedIndexPaths removeObject:indexPath];
}

稍后使用selectedIndexPaths做任何你想做的事情！干杯！

Use selectedIndexPaths later to do whatever you wish! Cheers!

-Akshay

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