如何使用 uitableviewcell 在每个 uitableview 行中创建不同数量的 uilabel？

Posted 2023-03-04

【中文标题】如何使用 uitableviewcell 在每个 uitableview 行中创建不同数量的 uilabel？

【英文标题】：How can I create different amount of uilabel in each uitableview row with uitableviewcell?

【发布时间】：2017-09-26 06:47:03

【问题描述】：

我想在 UITableViewCell 的一行中创建不同数量的 UILabel，但我真的不知道该怎么做。如果我使用 UITableViewCell 的属性，它将在一行中只显示一个 UILabel（我使用动态原型单元格。），如果我在“cellForRowAtIndexPath”方法中创建每个标签，那么它将遇到重用问题，就像这样

ＳＣＲＥＥＮＳＨＯＴ:

这是我的代码：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
SpreeAllOrdersTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"SpreeAllOrdersTableViewCell" forIndexPath:indexPath];
NSString *itemName = @"";
NSString *variantName = @"";
NSString *quantity = @"";
NSDictionary *tempDic;
NSArray *orderItemsAry;
CGFloat collectLabelHeight = 0.0;
for (NSInteger i=0; i<aryForStatus.count; i++) 
    if (i == indexPath.section) 
        tempDic = [SharedFunctions getValidDictionary:[[aryForStatus objectAtIndex:i] objectAtIndex:indexPath.row]];
        cell.orderID.text = [SharedFunctions getValidString:[tempDic objectForKey:@"id"]];
        cell.requestedUserName.text = [SharedFunctions getValidString:[tempDic objectForKey:@"requesterUserName"]];
        itemName = [SharedFunctions getValidString:[tempDic objectForKey:@"name"]];
        orderItemsAry = [SharedFunctions getValidArray:[tempDic objectForKey:@"orderItems"]];

        for (NSUInteger a=0; a<orderItemsAry.count; a++) 
            variantName = [[orderItemsAry objectAtIndex:a] objectForKey:@"variantName"];
            quantity = [[orderItemsAry objectAtIndex:a] objectForKey:@"quantity"];

            UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20, cell.requestedUserName.frame.origin.y + 30 + a*40, cell.frame.size.width/2, 30)];

            label.text = [NSString stringWithFormat:@"%@, %@ x %@", variantName, itemName, quantity];
            label.textColor = [UIColor colorWithRed:74.0/255.0 green:74.0/255.0 blue:74.0/255.0 alpha:1.0];
            label.font = [UIFont fontWithName:@"Helvetica-Bold" size:14];
            label.textAlignment = NSTextAlignmentCenter;
            label.layer.backgroundColor = [UIColor colorWithRed:216.0/255.0 green:216.0/255.0 blue:216.0/255.0 alpha:1.0].CGColor;
            label.layer.cornerRadius = 5.0;
            label.layer.masksToBounds = YES;
            [label removeFromSuperview];
            [cell.contentView addSubview:label];

            collectLabelHeight = 125 + a*40;
        
        UILabel *collectionLabel = [[UILabel alloc] initWithFrame:CGRectMake(16, collectLabelHeight - 10, cell.frame.size.width, 30)];
        collectionLabel.textColor = [UIColor colorWithRed:155.0/255.0 green:155.0/255.0 blue:155.0/255.0 alpha:1.0];
        collectionLabel.font = [collectionLabel.font fontWithSize:13];
        if ([[tempDic objectForKey:@"status"] isEqualToString:REQUEST_STATUS_PENDING_PURCHASE]) 
            collectionLabel.text = [NSString stringWithFormat:@"Deposited on %@", [SharedFunctions getValidString:[tempDic objectForKey:@"depositedAt"]]];
        else if ([[tempDic objectForKey:@"status"] isEqualToString:REQUEST_STATUS_PENDING_DELIVERY]) 
            if ([[SharedFunctions getValidString:[tempDic objectForKey:@"deliveryMethod"]] isEqualToString:@"MeetUp"]) 
                collectionLabel.text = [NSString stringWithFormat:@"MeetUp @ %@", [SharedFunctions getValidString:[tempDic objectForKey:@"meetUpLocation"]]];
            else 
                collectionLabel.text = @"Courier Delivery";
            
        else if ([[tempDic objectForKey:@"status"] isEqualToString:REQUEST_STATUS_PENDING_ACKNOWLEDGEMENT]) 
            collectionLabel.text = [NSString stringWithFormat:@"Dispatched on %@", [SharedFunctions getValidString:[tempDic objectForKey:@"deliveredAt"]]];
        else if ([[tempDic objectForKey:@"status"] isEqualToString:REQUEST_STATUS_COMPLETED]) 
            collectionLabel.text = [NSString stringWithFormat:@"Released Payment on %@", [SharedFunctions getValidString:[tempDic objectForKey:@"completedAt"]]];
        else if ([[tempDic objectForKey:@"status"] isEqualToString:REQUEST_STATUS_CANCELLED]) 
            collectionLabel.text = [NSString stringWithFormat:@"Cancelled on %@", [SharedFunctions getValidString:[tempDic objectForKey:@"cancelledAt"]]];
        
        [collectionLabel removeFromSuperview];
        [cell.contentView addSubview:collectionLabel];
    

return cell;

更新：

即使我使用 uitableviewcell 的子类，但它仍然不起作用。 如果我在 tableviewcellcontroller 的 init 中创建 uilabel 并且它不会是来自 uitableview 的 receive.array 数据，或者当我使用 init 方法时我需要使用该块将数组发送到 tableviewcell？ 提前致谢！！

@implementation SpreeAllOrdersTableViewCell 
UILabel *label;
UILabel *collectionLabel;

- (void)awakeFromNib 
[super awakeFromNib];

- (void)setSelected:(BOOL)selected animated:(BOOL)animated 
[super setSelected:selected animated:animated];

- (void)layoutCellView 
NSString *itemName = @"";
NSString *variantName = @"";
NSString *quantity = @"";
NSDictionary *tempDic;
NSArray *orderItemsAry;
CGFloat collectLabelHeight = 0.0;
for (NSInteger i=0; i<self.itemArray.count; i++) 
    if (i == self.cellSection) 
        tempDic = [SharedFunctions getValidDictionary:[[self.itemArray objectAtIndex:i] objectAtIndex:self.cellRow]];
        self.orderID.text = [SharedFunctions getValidString:[tempDic objectForKey:@"id"]];
        self.requestedUserName.text = [SharedFunctions getValidString:[tempDic objectForKey:@"requesterUserName"]];
        itemName = [SharedFunctions getValidString:[tempDic objectForKey:@"name"]];
        orderItemsAry = [SharedFunctions getValidArray:[tempDic objectForKey:@"orderItems"]];

        for (NSUInteger a=0; a<orderItemsAry.count; a++) 
            variantName = [[orderItemsAry objectAtIndex:a] objectForKey:@"variantName"];
            quantity = [[orderItemsAry objectAtIndex:a] objectForKey:@"quantity"];

            label = [[UILabel alloc] initWithFrame:CGRectMake(20, self.requestedUserName.frame.origin.y + 30 + a*40, self.frame.size.width/2, 30)];

            // let background color fit the text
            //                CGRect frame = label.frame;
            //                frame.size.width = [label sizeThatFits:frame.size].width;
            //                label.frame = frame;
            //                label.lineBreakMode = NSLineBreakByCharWrapping;
            label.text = [NSString stringWithFormat:@"%@, %@ x %@", variantName, itemName, quantity];
            label.textColor = [UIColor colorWithRed:74.0/255.0 green:74.0/255.0 blue:74.0/255.0 alpha:1.0];
            label.font = [UIFont fontWithName:@"Helvetica-Bold" size:14];
            label.textAlignment = NSTextAlignmentCenter;
            label.layer.backgroundColor = [UIColor colorWithRed:216.0/255.0 green:216.0/255.0 blue:216.0/255.0 alpha:1.0].CGColor;
            label.layer.cornerRadius = 5.0;
            label.layer.masksToBounds = YES;
            [self.contentView addSubview:label];

            collectLabelHeight = 125 + a*40;
        
        collectionLabel = [[UILabel alloc] initWithFrame:CGRectMake(16, collectLabelHeight - 10, self.frame.size.width, 30)];
        collectionLabel.textColor = [UIColor colorWithRed:155.0/255.0 green:155.0/255.0 blue:155.0/255.0 alpha:1.0];
        collectionLabel.font = [collectionLabel.font fontWithSize:13];
        if ([[tempDic objectForKey:@"status"] isEqualToString:REQUEST_STATUS_PENDING_PURCHASE]) 
            collectionLabel.text = [NSString stringWithFormat:@"Deposited on %@", [SharedFunctions getValidString:[tempDic objectForKey:@"depositedAt"]]];
        else if ([[tempDic objectForKey:@"status"] isEqualToString:REQUEST_STATUS_PENDING_DELIVERY]) 
            if ([[SharedFunctions getValidString:[tempDic objectForKey:@"deliveryMethod"]] isEqualToString:@"MeetUp"]) 
                collectionLabel.text = [NSString stringWithFormat:@"MeetUp @ %@", [SharedFunctions getValidString:[tempDic objectForKey:@"meetUpLocation"]]];
            else 
                collectionLabel.text = @"Courier Delivery";
            
        else if ([[tempDic objectForKey:@"status"] isEqualToString:REQUEST_STATUS_PENDING_ACKNOWLEDGEMENT]) 
            collectionLabel.text = [NSString stringWithFormat:@"Dispatched on %@", [SharedFunctions getValidString:[tempDic objectForKey:@"deliveredAt"]]];
        else if ([[tempDic objectForKey:@"status"] isEqualToString:REQUEST_STATUS_COMPLETED]) 
            collectionLabel.text = [NSString stringWithFormat:@"Released Payment on %@", [SharedFunctions getValidString:[tempDic objectForKey:@"completedAt"]]];
        else if ([[tempDic objectForKey:@"status"] isEqualToString:REQUEST_STATUS_CANCELLED]) 
            collectionLabel.text = [NSString stringWithFormat:@"Cancelled on %@", [SharedFunctions getValidString:[tempDic objectForKey:@"cancelledAt"]]];
        
        [self.contentView addSubview:collectionLabel];
    

- (void)prepareForReuse 
[super prepareForReuse];
label.text = nil;
collectionLabel.text = nil;
[label removeFromSuperview];
[collectionLabel removeFromSuperview];

更新： 终于解决了这个问题，在cell.contentview的addsubview前加上[cell.contentView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)]; ，不用自定义cell，只能使用UITableviewCell。

【问题讨论】：

动态创建标签时遇到什么问题。

这里是截图链接：i.stack.imgur.com/LcFYs.png

标签在重复使用单元格后会与其他标签的信息重叠。

可能是您在 heightForRowAtIndexPath 方法中没有给出正确的高度。

在我滚动视图之前，一切都很好，这个截图是我滚动回顶部之后的......

【参考方案1】：

创建UITableViewCell 的自定义子类。