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我创建了一个 UITableViewCell 笔尖，我正在加载到我的 tableview 中，但是当我滚动表格时发生了一些奇怪的事情，如果我向下滚动进来的新单元格会显示一瞬间的默认值，然后如果我滚动up 同样的事情也在顶部发生。

下面的代码根据 myObj 提供的数据决定加载哪个 nib，希望这是可以理解的

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (indexPath.section == 0) {
        // Set cell height
        [self tableView:tableView heightForRowAtIndexPath:indexPath];

        //call obj array with all of the values from my sorting algorithum
        SearchResultItem *myObj = (searchResultItem*)[dataArrayOfObjects objectAtIndex:indexPath.row];



        // This gets the year string ready  ----->

        // Create Year string
        NSString *yearRangeString = [[NSString alloc] init];

        // do some special stuff here with the years
        if ((myObj.yearStart < 1) && (myObj.yearFinish < 1)){
            //            yearRangeLabel.text = @"";
            yearRangeString = @"";
        }
        if ((myObj.yearStart < 1) && (myObj.yearFinish > 1)){
            //            yearRangeLabel.text = [NSString stringWithFormat:@"upto %i", myObj.yearFinish];
            yearRangeString = [NSString stringWithFormat:@"upto %i", myObj.yearFinish];
        }
        if ((myObj.yearStart > 1) && (myObj.yearFinish < 1)){
            //            yearRangeLabel.text = [NSString stringWithFormat:@"from %i", myObj.yearStart];
            yearRangeString = [NSString stringWithFormat:@"from %i", myObj.yearStart];
        }
        if ((myObj.yearStart > 1) && (myObj.yearFinish > 1)){
            //            yearRangeLabel.text = [NSString stringWithFormat:@"%i to %i",myObj.yearStart, myObj.yearFinish];
            yearRangeString = [NSString stringWithFormat:@"%i to %i",myObj.yearStart, myObj.yearFinish];
        }

        // adjust year string is (submodel) is avalible or not
        if (([yearSelectedString isEqualToString:@"all"]) && ([sModelSelectedString isEqualToString:@"all"])) {
            yearRangeString = [NSString stringWithFormat:@"(%@) %@", myObj.subModel, yearRangeString];
            yearRangeLabel.text = yearRangeString;
        }
        else if ((![yearSelectedString isEqualToString:@"all"]) && ([sModelSelectedString isEqualToString:@"aSearchResultItemll"])) {
            yearRangeString = [NSString stringWithFormat:@"(%@)", myObj.subModel];
            yearRangeLabel.text = yearRangeString;
        }
        else if (([yearSelectedString isEqualToString:@"all"]) && (![sModelSelectedString isEqualToString:@"all"])) {
            yearRangeString = [NSString stringWithFormat:@"%@", yearRangeString];
            yearRangeLabel.text = yearRangeString;
        }
        else if ((![yearSelectedString isEqualToString:@"all"]) && (![sModelSelectedString isEqualToString:@"all"])) {
            yearRangeLabel.text = nil;
        }

    // check year string if too large use B nibs ----->

        // Get yearRangeString width to see if you need to use a yearRangeLabel with second line
        CGSize yearStringSize = [yearRangeString sizeWithFont:[UIFont fontWithName:@"Helvetica" size:15] constrainedToSize:CGSizeMake(226, 21) lineBreakMode:NSLineBreakByWordWrapping ];

        // NSLog(@"width = %f, height = %f", yearStringSize.width, yearStringSize.height);



     // Get rest of nibs ready ----->

        // Set custom cell to display
        // check to see if there is a description, if there is choose the correct tableviewcell

        if (([myObj.note isEqualToString:@""]) && (([sModelSelectedString isEqualToString:@"all"]) || ([yearSelectedString isEqualToString:@"all"])) && (yearStringSize.width <= 100.00)) {

            // Configure the cell using custom cell
            [[NSBundle mainBundle] loadNibNamed:@"auSearchCell" owner:self options:nil];

            // Set up the different labels in each cell
            descriptionLabel.text = myObj.sDescription;
            iDLabel.text = [NSString stringWithFormat:@"%i", myObj.mID];
            cLabel.text = myObj.cDesc;
            INLabel.text = [NSString stringWithFormat:@"%i", myObj.ssID];

            cell = automativeSearchCell;
        }

        /// other if statments for different types of cells

         //Disclosure Indicator
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    }

    return cell;
}

任何帮助将不胜感激

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2 回答 2

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看起来你有几个问题。您不应该调用 heightForRowAtIndexPath:，它是由表视图调用的。您应该根据索引路径在那里设置您需要的任何高度。看起来您每次都将一个普通的 UITableViewCell 出队，然后如果字符串太长则切换到另一个单元格。您应该首先检查字符串大小，然后将正确的单元格出列。此外，看起来你每 t1me 都在加载笔尖，因为你的字符串太长了。相反，您应该只注册您的 nib（也许在 viewDidLoad 中），然后使用 dequeueReusableCellWithIdentifier:forIndexPath: 方法而不是您正在使用的旧方法。该方法始终保证使单元格出列，因此不需要 if cell == nil 子句。

于 2013-02-14T21:51:47.283 回答
0

您应该检查您的 UITableViewCell *cell 对象是否为零（即，是否有任何要出列的内容）。如果是这样，分配一个新的。

于 2013-02-14T21:44:35.700 回答