如何使用自定义单元格向我的UITableView添加复选框？

时间：2015-11-19 10:19:36

标签： ios objective-c uitableview tableviewcell

我有自定义单元格的UITableview。在那个单元格中，我有一个按钮，我打算将其用作复选框。这意味着在单击按钮时我将图像更改为＆＃34;刻度线＆＃34;。再次选择它会更改为空按钮。我已经完成了那一部分，但问题是因为UITablecell重新使用单元格，如果我向下滚动，则对于非选定单元格再次出现勾号。请帮我提供一个示例代码或逻辑来实现这一点。请注意，我不希望使用默认为UITable的复选标记附件。

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString * cellIdentifier = @"cells";
    cell = (MyWachizCustomCell *)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    cell.whiteCircle.tag = indexPath.row;
    //cell=nil;
    if(cell == nil)
    {
        cellLoadArray=[[NSBundle mainBundle]loadNibNamed:@"MyWachizCustomCell" owner:self options:nil];

        if(tableView==self.tableMyFavourite)
        {
            if (UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPad)
            {
                cell=[cellLoadArray objectAtIndex:3];

            }
            else
            {
                cell=[cellLoadArray objectAtIndex:1];
                NSLog(@"Index Path %ld",(long)indexPath.row);

            }


            if(indexPath.row%2==0)
                cell.imgCellBg.backgroundColor=[UIColor whiteColor];
            else
                cell.imgCellBg.backgroundColor=[UIColor colorWithRed:0.92 green:0.91 blue:0.91 alpha:1.0];
        }
        else if (tableView==self.tableMySearch)
        {
            if (UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPad)
            {
                cell=[cellLoadArray objectAtIndex:2];

            }
            else
            {
                cell=[cellLoadArray objectAtIndex:0];

            }

            if(indexPath.row%2==0)
                cell.imgCellBg.backgroundColor=[UIColor whiteColor];
            else
                cell.imgCellBg.backgroundColor=[UIColor colorWithRed:0.92 green:0.91 blue:0.91 alpha:1.0];
        }
        else if(tableView==self.tableMyAds)
        {
            if (UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPad)
            {
                cell=[cellLoadArray objectAtIndex:3];

            }
            else
            {
                cell=[cellLoadArray objectAtIndex:1];

            }
            if(indexPath.row%2==0)
                cell.imgCellBg.backgroundColor=[UIColor whiteColor];
            else
                cell.imgCellBg.backgroundColor=[UIColor colorWithRed:0.92 green:0.91 blue:0.91 alpha:1.0];
        }
    }
    cell.btnGreen.hidden=YES;
    cell.btnAdsDeleteAction.hidden=YES;
    self.btnMyFavoriteDeleteCheckBox.hidden=YES;
    self.btnMySearchesDeleteCheckBox.hidden=YES;
    self.btnMyAdsDeleteCheckBox.hidden=YES;
    self.btnMyFavoriteDeleteAction.hidden=YES;
    self.btnMySearchesDeleteAction.hidden=YES;
    self.btnMyAdsDeleteAction.hidden=YES;

    if(tableView==self.tableMyFavourite)
    {
        cell.btnGreen.hidden=NO;
        cell.btnAdsDeleteAction.hidden=YES;
        self.btnMyFavoriteDeleteCheckBox.hidden=NO;
        self.btnMySearchesDeleteCheckBox.hidden=YES;
        self.btnMyAdsDeleteCheckBox.hidden=YES;
        self.btnMyFavoriteDeleteAction.hidden=NO;
        self.btnMySearchesDeleteAction.hidden=YES;
        self.btnMyAdsDeleteAction.hidden=YES;

//        if(checkBoxTagValue==1)
//        {
//            //cell.btnGreen.selected=YES;
//            cell.imgCheckbox.image=[UIImage imageNamed:@"markedmw.png"];
//        }
//        else
//        {
//            //cell.btnGreen.selected=NO;
//            cell.imgCheckbox.image=[UIImage imageNamed:@"unmarkedmw.png"];
//        }

        if ([[[arrayMyFavourite objectAtIndex:indexPath.row] valueForKey:@"seller_verification"] isEqualToString:@"Yes"]) {

            cell.imgverification.image=[UIImage imageNamed:@"verifiedIcon.png"];
            cell.lblverification.text=@"Verified";
        }
        else {

            cell.imgverification.image=nil;
            cell.lblverification.text=@"";
        }

            if([[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"favorite_id"] isKindOfClass:[NSNull class]])
            {
                cell.lblDeleteMyFavourite.text=@"";
            }
            else
            {
                for(NSString * string in self.arrayDynamicFavourite)
                {
                    if([string isEqualToString:[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"favorite_id"]])
                        cell.btnGreen.selected=YES;

                }

                cell.lblDeleteMyFavourite.text=[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"favorite_id"];
                //NSLog(@"%@",cell.lblDeleteMyFavourite.text);
            }

        //NSLog(@"%@",[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"watch_name"]);
        //NSLog(@"%@",[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"watch_price"]);

//        Favourite *cart=(Favourite *)[NSEntityDescription insertNewObjectForEntityForName:@"Favourite" inManagedObjectContext:app.managedObjectContext];
//        
//        cart.favId=[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"id"];
//        [app saveContext];

        if([[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"watch_name"] isKindOfClass:[NSNull class]])
        {
            if([[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"watch_price"] isKindOfClass:[NSNull class]])
            {
                cell.lblAdsTitle.text=@"NA";
                cell.lblprice.text=@"NA";
            }
        }
        else
        {
            //NSLog(@"%@",[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"id"]);
            //NSLog(@"%@",[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"images_file"]);

            if([[[arrayMyFavourite objectAtIndex:indexPath.row] valueForKey:@"iso"] isKindOfClass:[NSNull class]])
            {
                cell.imgLogo.image = [UIImage imageNamed:@"Kuwait.svg.png"];
            }
            else
            {
                [cell showImage:arrayMyFavourite :indexPath.row];
            }

            NSString * imageURL=[NSString stringWithFormat:@"%@%@%@/%@",BaseURL,@"uploads/watch/",[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"id"],[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"images_file"]];

//            [cell.imgMain sd_setImageWithURL:[NSURL URLWithString:imageURL] placeholderImage:[UIImage imageNamed:@"wachizLogoIcon.png"] completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL)
//             {
//             }];

            [cell.imgMain sd_setImageWithURL:[NSURL URLWithString:imageURL]
                            placeholderImage:[UIImage imageNamed:@"wachizLogoIcon.png"]
                                     options:SDWebImageRefreshCached];

            cell.lblAdsTitle.text=[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"watch_name"];
            cell.lblprice.text=[[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"watch_price"];

            [cell.btnISO setTitle:@"NS" forState:UIControlStateNormal];
            for (NSDictionary *dict in [[arrayMyFavourite objectAtIndex:indexPath.row]valueForKey:@"features"]) {

                if ([[dict objectForKey:@"feature_name"] isKindOfClass:[NSString class]]&&[[dict objectForKey:@"feature_name"] isEqualToString:@"Currency"]) {

                    [cell.btnISO setTitle:[dict objectForKey:@"feature_value"] forState:UIControlStateNormal];
                    break;
                }
            }
        }
        if(indexPath.row%2==0)
            cell.imgCellBg.backgroundColor=[UIColor whiteColor];
        else
            cell.imgCellBg.backgroundColor=[UIColor colorWithRed:0.92 green:0.91 blue:0.91 alpha:1.0];

    }
    else if (tableView==self.tableMySearch)
    {
        self.btnMyFavoriteDeleteCheckBox.hidden=YES;
        self.btnMySearchesDeleteCheckBox.hidden=NO;
        self.btnMyAdsDeleteCheckBox.hidden=YES;
        self.btnMyFavoriteDeleteAction.hidden=YES;
        self.btnMySearchesDeleteAction.hidden=NO;
        self.btnMyAdsDeleteAction.hidden=YES;

        cell.lblDeleteMySearch.text=[[arrayMySearch objectAtIndex:indexPath.row] valueForKey:@"id"];

        if(checkBoxTagValue==2)
        {
            //cell.btnSearchDeleteAction.selected=YES;
            cell.imgCheckbox.image=[UIImage imageNamed:@"markedmw.png"];
        }
        else
        {
            //cell.btnSearchDeleteAction.selected=NO;
            cell.imgCheckbox.image=[UIImage imageNamed:@"unmarkedmw.png"];
        }

        if([[[arrayNewMySearch objectAtIndex:indexPath.row]valueForKey:@"searchKey"] isKindOfClass:[NSNull class] ] || [[[arrayNewMySearch objectAtIndex:indexPath.row]valueForKey:@"searchKey"] isEqualToString:@" "])
        {

            if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
            {
                cell.lblSearchTitle.font=[UIFont fontWithName:@"Helvetica Neue Bold" size:16];
                cell.lblSearchTitle.text=@"NA";
            }
            else
            {
                cell.lblSearchTitle.font=[UIFont fontWithName:@"Helvetica Neue Bold" size:14];
                cell.lblSearchTitle.text=@"NA";
            }
        }
        else
        {
            for(NSString * string in self.arrayDynamicSearch)
            {
                if([string isEqualToString:[[arrayMySearch objectAtIndex:indexPath.row] valueForKey:@"id"]])
                    cell.btnSearchDeleteAction.selected=YES;

            }

            cell.lblSearchTitle.text=[[arrayMySearch objectAtIndex:indexPath.row]valueForKey:@"favorites_name"];


            if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
            {
               cell.lblSearchTitle.font=[UIFont fontWithName:@"Helvetica Neue Bold" size:16];
            }
            else
            {
                cell.lblSearchTitle.font=[UIFont fontWithName:@"Helvetica Neue Bold" size:14];
            }
        }
        if(indexPath.row%2==0)
            cell.imgCellBg.backgroundColor=[UIColor whiteColor];
        else
            cell.imgCellBg.backgroundColor=[UIColor colorWithRed:0.92 green:0.91 blue:0.91 alpha:1.0];
    }
    else if(tableView==self.tableMyAds)
    {
        self.btnMyFavoriteDeleteCheckBox.hidden=YES;
        self.btnMySearchesDeleteCheckBox.hidden=YES;
        self.btnMyAdsDeleteCheckBox.hidden=NO;
        self.btnMyFavoriteDeleteAction.hidden=YES;
        self.btnMySearchesDeleteAction.hidden=YES;
        self.btnMyAdsDeleteAction.hidden=NO;

        if ([[[arrayMyAds objectAtIndex:indexPath.row] valueForKey:@"seller_verification"] isEqualToString:@"Yes"]) {

            cell.imgverification.image=[UIImage imageNamed:@"verifiedIcon.png"];
            cell.lblverification.text=@"Verified";
        }
        else {

            cell.imgverification.image=nil;
            cell.lblverification.text=@"";
        }

        cell.lblDeleteMyAds=[[arrayMyAds objectAtIndex:indexPath.row]valueForKey:@"id"];

        if(checkBoxTagValue==3)
        {
            //cell.btnAdsDeleteAction.selected=YES;
            cell.imgCheckbox.image=[UIImage imageNamed:@"markedmw.png"];
        }
        else
        {
            //cell.btnAdsDeleteAction.selected=NO;
            cell.imgCheckbox.image=[UIImage imageNamed:@"unmarkedmw.png"];
        }
        cell.btnGreen.hidden=YES;
        cell.btnAdsDeleteAction.hidden=NO;

        if([[[arrayMyAds objectAtIndex:indexPath.row]valueForKey:@"favorite_id"] isKindOfClass:[NSNull class]])
        {
            cell.lblDeleteMyFavourite.text=@"";
        }
        else
        {
            for(NSString * string in self.arrayDynamicAds)
            {
                if([string isEqualToString:[[arrayMyAds objectAtIndex:indexPath.row]valueForKey:@"id"]])
                    cell.btnAdsDeleteAction.selected=YES;

            }
            cell.lblDeleteMyFavourite.text=[[arrayMyAds objectAtIndex:indexPath.row]valueForKey:@"favorite_id"];
        }

        if([[[arrayMyAds objectAtIndex:indexPath.row]valueForKey:@"watch_name"] isKindOfClass:[NSNull class]])
        {
            if([[[arrayMyAds objectAtIndex:indexPath.row]valueForKey:@"watch_price"] isKindOfClass:[NSNull class]])
            {
                cell.lblAdsTitle.text=@"NA";
                cell.lblprice.text=@"NA";
            }
        }
        else
        {
            if([[[arrayMyAds objectAtIndex:indexPath.row] valueForKey:@"iso"] isKindOfClass:[NSNull class]])
            {
                cell.imgLogo.image = [UIImage imageNamed:@"Kuwait.svg.png"];
            }
            else
            {
                [cell showImage:arrayMyAds :indexPath.row];
            }

            NSString * imageURL=[NSString stringWithFormat:@"%@%@%@/%@",BaseURL,@"uploads/watch/",[[arrayMyAds objectAtIndex:indexPath.row]valueForKey:@"id"],[[arrayMyAds objectAtIndex:indexPath.row]valueForKey:@"images_file"]];

//            [cell.imgMain sd_setImageWithURL:[NSURL URLWithString:imageURL] placeholderImage:[UIImage imageNamed:@"wachizLogoIcon.png"] completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL)
//             {
//             }];

            [cell.imgMain sd_setImageWithURL:[NSURL URLWithString:imageURL]
                            placeholderImage:[UIImage imageNamed:@"wachizLogoIcon.png"]
                                     options:SDWebImageRefreshCached];

            cell.lblAdsTitle.text=[[arrayMyAds objectAtIndex:indexPath.row]valueForKey:@"watch_name"];
            cell.lblprice.text=[[arrayMyAds objectAtIndex:indexPath.row]valueForKey:@"watch_price"];

            [cell.btnISO setTitle:@"NS" forState:UIControlStateNormal];
            for (NSDictionary *dict in [[arrayMyAds objectAtIndex:indexPath.row]valueForKey:@"features"]) {

                if ([[dict objectForKey:@"feature_name"] isKindOfClass:[NSString class]]&&[[dict objectForKey:@"feature_name"] isEqualToString:@"Currency"]) {

                    [cell.btnISO setTitle:[dict objectForKey:@"feature_value"] forState:UIControlStateNormal];
                    break;
                }
            }
        }
        if(indexPath.row%2==0)
            cell.imgCellBg.backgroundColor=[UIColor whiteColor];
        else
            cell.imgCellBg.backgroundColor=[UIColor colorWithRed:0.92 green:0.91 blue:0.91 alpha:1.0];
    }

    cell.dp=self;

    return cell;
}

1 个答案:

答案 0 :(得分：1)

我可以用逻辑帮助你：

正如你所说的那样

UITableViewCell每次向上/向下滚动以便节省内存时都会重复使用。

您可以做的是将所有单元格的状态保存在一个模型中。

我们假设您的UITableView只有一个部分：

在NSMutableArray个单元格中存储NSNumber个状态（已选中/取消选中：Bool个cellForRowAtIndexPath个对象），并在UIButton中相对于您更改UIButton在你的阵列中。

按下NSMutableArray后，您可以更改try{ buffer.readManyAsync(sequence, 1, 3, null).get(500, TimeUnit.MILLISECONDS); } catch (TimeoutException e){ // We timed out, shame, let's move on } 中单元格状态的值。

我希望这会有所帮助。

修改

你找到了一个有效的例子here

洞的想法是你保持＆＃34;检查＆＃34;存储在模型中的信息，因为您无法依赖UI提供给您的任何时候，只要您显示您的单元格，您就可以使用模型并显示它所提供的信息。

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