子类化UITableViewCell不允许多个单元格标签 [英] Subclassing UITableViewCell isn't allowing multiple cell labels

问题描述

我已将 UITableViewCell 子类化，因为我不是标题和副标题，而是分别需要一个标题和两个单独的字幕，一个价格和一个条件值。 我正在以编程方式构建表，而不是在storyboard中构建。我像这样设置子类：

I've subclassed UITableViewCell because rather than a Title and subtitle, I want a title and two separate subtitles, a price and a condition value respectively. I'm building the table programmatically, not in storyboard. I set up the subclassing like so:

MatchCenterCell.h：

#import <UIKit/UIKit.h>

@interface MatchCenterCell : UITableViewCell

@property (strong, nonatomic) IBOutlet UILabel *PriceLabel;
@property (strong, nonatomic) IBOutlet UILabel *ConditionLabel;

@end

然后尝试使用它：

MatchCenterViewController.m：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Initialize cell
    static NSString *CellIdentifier = @"MatchCenterCell";
    MatchCenterCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (!cell) {
        // if no cell could be dequeued create a new one
        cell = [[MatchCenterCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
    }

    tableView.separatorColor = [UIColor clearColor];

    NSDictionary *currentSectionDictionary = _matchCenterArray[indexPath.section];
    NSArray *top3ArrayForSection = currentSectionDictionary[@"Top 3"];

    if (top3ArrayForSection.count-1 < 1) {

        // title of the item
        cell.textLabel.text = @"No items found, but we'll keep a lookout for you!";
        cell.textLabel.font = [UIFont systemFontOfSize:12];

        // price of the item
        cell.detailTextLabel.text = @"";

        // image of the item
        NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:@""]];
        [[cell imageView] setImage:[UIImage imageWithData:imageData]];

    }

    else {

        // title of the item
        cell.textLabel.text = _matchCenterArray[indexPath.section][@"Top 3"][indexPath.row+1][@"Title"];
        cell.textLabel.font = [UIFont systemFontOfSize:14];

        // price of the item
        cell.PriceLabel.text = [NSString stringWithFormat:@"$%@", _matchCenterArray[indexPath.section][@"Top 3"][indexPath.row+1][@"Price"]];
        cell.PriceLabel.textColor = [UIColor colorWithRed:0/255.0f green:127/255.0f blue:31/255.0f alpha:1.0f];

        // condition of the item
        cell.ConditionLabel.text = [NSString stringWithFormat:@"$%@", _matchCenterArray[indexPath.section][@"Top 3"][indexPath.row+1][@"Item Condition"]];
        cell.ConditionLabel.textColor = [UIColor colorWithRed:0/255.0f green:127/255.0f blue:31/255.0f alpha:1.0f];

        // image of the item
        NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:_matchCenterArray[indexPath.section][@"Top 3"][indexPath.row+1][@"Image URL"]]];
        [[cell imageView] setImage:[UIImage imageWithData:imageData]];

        cell.imageView.layer.masksToBounds = YES;
        cell.imageView.layer.cornerRadius = 2.5;

    }

    return cell;

}

但是只有项目的标题和图片显示在每个单元格， PriceLabel 和 ConditionLabel 不显示。我是否错误地将其分类？

However only the title of the item and the image show in each cell, the PriceLabel and ConditionLabel don't show. Have I subclassed this incorrectly?

推荐答案

希望这对你有所帮助

MatchCenterCell的xib文件

if your making the xib file for MatchCenterCell

而不是这个

cell = [[MatchCenterCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];---------- (1)

你应该使用

cell = (MatchCenterCell *) [[[NSBundle mainBundle] loadNibNamed:@"MatchCenterCell" owner:self options:nil] lastObject]; -------- (2)

并使用单元格。 PriceLabel.text = @text而不是 cell.textLabel.text 。

已编辑

您是以编程方式完成所有操作，然后使用（1）正如你已经在做的那样，
- >首先检查你是否对你的单元格元素（标签和图像）进行了alloc-init

you are making it all programmatically , then use (1) as you are already doing , ->first check you doing alloc-init of your cell element(label and image)

---你的UITableViewCell子类 - ----

--- your UITableViewCell subclass -----

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {

       self.PriceLabel  = [[ UILabel alloc]initWithFrame:CGRectMake(10, 10, 30, 40)];

   }
    return self;
}

---你的tableview委托方法--------

--- your tableview delegate method --------

{
   .....

cell.PriceLabel.text = [NSString stringWithFormat:@"$%@", _matchCenterArray[indexPath.section][@"Top 3"][indexPath.row+1][@"Price"]];

   [cell.contentView addSubview:cell.PriceLabel];

   .....
}

注意： - 最佳做法是在UITableViewCell子类中提供数据。

Note :- The best practice is to feed data in UITableViewCell subclass.

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