ios - 如果行数超过 8 行，部分自定义 UITableViewCell 会很有趣

Question

我有一个 UIViewController 使用 UITableView 来显示一个数组。这个数组从 Core Data 中获取数据。除了一次显示超过 8 个条目之外，所有的工作都很好，当滚动表格 View 时，行会出现在其他行之上。行中的文本也周期性地开始变得有些模糊。很奇怪。

这是我的“rowForCell”方法的代码。

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{   
    //Creates a new cell for every row (as in, every time this method is called).
    //UITableViewCell *aCell      = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"];

    //'alloc init' is NOT called here therefore a cell object has to be made inside the table view in the storyboard (which I've done and named cell). This is a more effecient and better way then 'alloc init'. Cells are dequeued & reused.
    UITableViewCell *aCell      = [tableView dequeueReusableCellWithIdentifier:@"cell"];
    if (aCell == nil)
    {
        aCell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:@"cell"];
    }


    //Makes sure the separator doesn't have that little gap in the beginning.
    //NOTE: This MUST be here and "_tableView.separatorInset = UIEdgeInsetsZero;" must exist inside [self extraTableViewParameter]!
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
    {
        aCell.layoutMargins                     = UIEdgeInsetsZero;
        aCell.preservesSuperviewLayoutMargins   = NO;
    }


    //Cell details.
    aCell.backgroundColor           = [UIColor clearColor];
    aCell.textLabel.textColor       = [UIColor whiteColor];
    //aCell.textLabel.font            = [UIFont fontWithName:@"SanFrancisco" size:20];
    aCell.detailTextLabel.textColor = [UIColor lightGrayColor];
    //aCell.detailTextLabel.font      = [UIFont fontWithName:@"SanFrancisco" size:20];


    //Fill cell with data.
    //NSDictionary *item          = [_tableData objectAtIndex:indexPath.row]; //[_fetchArray objectAtIndex:indexPath.row];
    //AssetsPartners *items       = [_fetchArray objectAtIndex:indexPath.row]; //Using this line of code, instead of the bottom one, will result in _fetchArray NOT being sorted.
    AssetsPartners *items       = [_fetchedResultsController objectAtIndexPath:indexPath]; //Ask '_fetchedResultsController' what's at this particular indexPath right now. Also alphabetically sorts the array list.



    //CUSTOM LABEL instead of standard '.textLabel.text' because 'items.name' is sometimes too long & covers up price: looks messy.
    UILabel *label  = [[UILabel alloc] initWithFrame:CGRectMake(65.0, 15.0, 150.0, 30.0)];
    label.textColor = [UIColor whiteColor];
    label.text      = items.name;
    [aCell.contentView addSubview:label];


    aCell.textLabel.text        = @""; //Make sure this is empty!
    //aCell.textLabel.text        = items.name; //item[@"title"]; //Preiously, was just this with out the UILabel.
    NSInteger anInteger         = [items.balance integerValue];
    aCell.detailTextLabel.text  = [NSString stringWithFormat:@"%@ P", [self addWhitespacesTo:anInteger]]; //item[@"balance"]];


    //Check if it's appropriate to add image to cell or not.
    if (items.photo == nil)
    {
        NSLog(@"No image.");
    }
    else
    {
        NSString *iconName = [self cutOutString:@"bizzer://" fromString:items.photo]; //Get rid of "bizzer://" from string value.


        //Standard UITableViewCell accessors/parameters. Only used to create a clear image to shift text over.
        aCell.imageView.image = [UIImage imageNamed:iconName];  //Inputs appropriate icon into cell image.
        [self turnIcon:aCell.imageView toColor:@"clearColor"];    //Changes icons color accordingly.


        //Entirely new UIImageView for every UITableViewCell (to tweak the frame size & position).
        UIImageView *newImgView = [[UIImageView alloc] initWithFrame:CGRectMake(10.0, 15.0, 35.0, 35.0)];
        newImgView.image        = [UIImage imageNamed:iconName];
        [aCell.contentView addSubview:newImgView];
        [self turnIcon:newImgView toColor:items.color];
    }

    return aCell;
}

Answer 1

尝试重新排列您的代码如下

if (aCell == nil)
    {
        aCell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:@"cell"];
        UILabel *label  = [[UILabel alloc] initWithFrame:CGRectMake(65.0, 15.0, 150.0, 30.0)];
        label.textColor = [UIColor whiteColor];
        label.tag = 999;
        [aCell.contentView addSubview:label];
    }


UILabel *label  = (UILabel *)[aCell.contentView viewWithTag:999];

AssetsPartners *items = [_fetchedResultsController objectAtIndexPath:indexPath]; 
label.text = items.name;