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标题: ios - 为什么 UITableView 单元格在滚动时重叠？ [打印本页]

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作者: 菜鸟教程小白    时间: 2022-12-13 05:32
标题: ios - 为什么 UITableView 单元格在滚动时重叠？

我有一个大约 100 行的 UITableView。

每个单元格都有选中的图像，但是当我们滚动 UITableView 时，所有单元格都在未选中的单元格中重叠。

(UITableViewCell *)tableViewUITableView *)tableView
     cellForRowAtIndexPathNSIndexPath *)indexPath
{
static NSString *MyIdentifier = @"Cell";
static NSString *MyIdentifierAds = @"Cell1";

UITableViewCell *cell ;

if (tableView==self.tblSeachMarketplace) {
    if (indexPath.section==0) {
        cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];
 //            if(cell== nil)
 //            {
 //                cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault   reuseIdentifier:MyIdentifier];
 //            }

        UILabel* lblTitle = (UILabel *)[cell viewWithTag:200];
        UILabel*lblSubheading = (UILabel *)[cell viewWithTag:300];
        UIImageView* imgRating = (UIImageView *)[cell viewWithTag:400];
        UIImageView* imgLogo = (UIImageView *)[cell viewWithTag:100];
        [lblTitle setFont:[UIFont fontWithName"Lato-Bold" size:12.5f]];
        [lblSubheading setFont:[UIFont fontWithName"Lato-Bold" size:9.0f]];
        [lblTitle setFont:[UIFont fontWithName"Lato-Bold" size:12.5f]];
        [lblSubheading setFont:[UIFont fontWithName"Lato-Bold" size:9.0f]];
        [lblTitle setTextColor:[Global colorFromHexString"#4394d4"]];
        NSDictionary*row=[[NSDictionary alloc]init];
        cell.contentView.backgroundColor =  [UIColor whiteColor];
        if (allMarketPlaceNewsletters.count>0) {
            row=[allMarketPlaceNewsletters objectAtIndex:indexPath.row];
            NSString *imgUrl=[row valueForKey"logo"];
            if (imgUrl != (id)[NSNull null]) {
                NSURL *urlTemp = [NSURL URLWithString:imgUrl];
                [imgLogo  setImageWithURL:urlTemp placeholderImage:[UIImage imageNamed"placeholder.jpg"]];
            }

            UIButton *btnLocationRight=(UIButton *)[cell viewWithTag:600];
             UIButton *btnLocationPlus=(UIButton *)[cell viewWithTag:500];

            if ([[row valueForKey"subscribed"] isEqualToString"Y"]) {
                [btnLocationRight setHidden:NO];
                [btnLocationPlus setHidden:YES];
                cell.contentView.backgroundColor =  [Global colorFromHexString"#f0f9fc"];
                [btnLocationRight setImage:[UIImage imageNamed:@"righbtn.png"] forState:UIControlStateNormal];
                 [btnLocationRight setTag:indexPath.row];
    //          [btnLocationRight addTarget:self action:@selector(ButtonPressed forControlEvents:UIControlEventTouchUpInside];
              //  [cell addSubview:[self buttonWithMap:cell :@"righbtn.png":indexPath.row]];
            }else{
                cell.contentView.backgroundColor =  [UIColor whiteColor];
                [btnLocationPlus setTag:indexPath.row];
                [btnLocationPlus addTarget:self action:@selector(ButtonPressed forControlEvents:UIControlEventTouchUpInside];

                 [btnLocationPlus setImage:[UIImage imageNamed:@"darkplusbtn.png"] forState:UIControlStateNormal];

                [btnLocationRight setHidden:YES];
                 [btnLocationPlus setHidden:NO];
               // [cell addSubview:[self buttonWithMap:cell :@"darkplusbtn.png" :indexPath.row]];
            }

            NSString *stars=[NSString stringWithFormat:@"%d.png",[[row valueForKey:@"rating"] intValue]];
            imgRating.image=[UIImage imageNamed:stars];

        }

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Best Answer-推荐答案

在 cellForRowAtIndexPath

中添加此代码

NSArray *subviews = [[NSArray alloc] initWithArray:cell.contentView.subviews];
for (UIView *subview in subviews)
{
    if([subview isKindOfClass:[UIView class]])
        [subview removeFromSuperview];
    else if([subview isKindOfClass:[UIImageView class]])
        [subview removeFromSuperview];
    else if([subview isKindOfClass:[UILabel class]])
        [subview removeFromSuperview];
    else if([subview isKindOfClass:[UIImage class]])
        [subview removeFromSuperview];
    else if([subview isKindOfClass:[UIButton class]])
        [subview removeFromSuperview];

}
[subviews release];

希望这会对您有所帮助。在此先感谢您。

关于ios - 为什么 UITableView 单元格在滚动时重叠？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20118286/

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