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标题: iphone - 滚动离开屏幕时 UITableViewCell 附件消失 [打印本页]

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作者: 菜鸟教程小白    时间: 2022-12-13 17:16
标题: iphone - 滚动离开屏幕时 UITableViewCell 附件消失

我有一个装满对象的 UITableView。在 didSelectRowAtIndexPath 方法中，我有一个 UITableViewCellAccessoryCheckmark 在选中行时出现，在未选中时消失。

这是 didSelectRowAtIndexPath 方法的代码:

- (void)tableViewUITableView *)tableView didSelectRowAtIndexPathNSIndexPath *)indexPath {
[tableView deselectRowAtIndexPath:indexPath animated:NO];
 UITableViewCell *curCell = [beerTable cellForRowAtIndexPath:indexPath];

if (curCell.accessoryType == UITableViewCellAccessoryCheckmark) {
    [curCell setAccessoryType:UITableViewCellAccessoryNone];
    compareCount = (compareCount - 1);

    if (tableView == [[self searchDisplayController] searchResultsTableView]) {
        NSString *objBeer = [searchResults objectAtIndex:indexPath.row];
        [compareBeers removeObject:[searchResults objectAtIndex:indexPath.row]];
        [compareCarbs removeObject:[carbAmount objectAtIndex:[beerNames indexOfObjectbjBeer]]];
    }
    else {
        [compareBeers removeObject:[beerNames objectAtIndex:indexPath.row]];
        [compareCarbs removeObject:[carbAmount objectAtIndex:indexPath.row]];
    }

}
else {
    [curCell setAccessoryType:UITableViewCellAccessoryCheckmark];
    compareCount = (compareCount + 1);

    if (tableView == [[self searchDisplayController] searchResultsTableView]) {
        NSString *objBeer = [searchResults objectAtIndex:indexPath.row];
        [compareBeers addObject:[searchResults objectAtIndex:indexPath.row]];
        [compareCarbs addObject:[carbAmount objectAtIndex:[beerNames indexOfObjectbjBeer]]];
    }
    else {
        [compareBeers addObject:[beerNames objectAtIndex:indexPath.row]];
        [compareCarbs addObject:[carbAmount objectAtIndex:indexPath.row]];
    }

}

if (compareCount > 0) {
    if (compareOn == YES){
    }
    else {
    compareButton.enabled = YES;
    UIImage *image = [UIImage imageNamed"redbutton.png"];
    [compareButton setImage:image];
    }
}

else {
    compareButton.enabled = NO;
    [compareButton setImage:nil];
    [compareButton setCustomView:nil];
}

}

我也有这个作为我的cellForIndexPath:

- (UITableViewCell *)tableViewUITableView *)tableView cellForRowAtIndexPathNSIndexPath *)indexPath {


static NSString *CellIdentifier = @"CustomCell";

CustomCell *cell = (CustomCell *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {

    NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed"CustomCell" owner:self options:nil];

    for (id currentObject in topLevelObjects){
        if ([currentObject isKindOfClass:[UITableViewCell class]]){
            cell =  (CustomCell *) currentObject;
            break;
        }
    }
}

// Setting separate tables correctly....


return cell;
}

My problem is that when the cell that is selected is scrolled out of view the checkmark associated with that value is now gone when back into view.

我应该怎么做才能使复选标记不消失？

谢谢

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Best Answer-推荐答案

当您滚动浏览数据时，您的单元格会被重新使用(这就是 dequeueReusableCellWithIdentifier 所做的)。在 didSelectRowAtIndexPath 中获得复选标记的单元格将被回收用于不同的行，并且不再与选中的行有任何连接。

您需要在CellForrowatIndExpath中设置/解开附件 View ，因此当签到的行滚动回到 View 中时，它们会得到适当检查。

关于iphone - 滚动离开屏幕时 UITableViewCell 附件消失，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5827034/

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