UiTableView标签自动换行

时间:2015-05-31 09:52:39

标签: ios objective-c uitableview uilabel

我使用单独的UILabel类定义了Cell中我的Label的边距:

- (void)drawTextInRect:(CGRect)rect {
    UIEdgeInsets insets = {5, 10,5, 10};
    [super drawTextInRect:UIEdgeInsetsInsetRect(rect, insets)]; 
}

使用以下代码,我从单元格中定义高度:

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    if (!self.customCell) {
        self.customCell = [self.chatTableView dequeueReusableCellWithIdentifier:@"CellChat"];
    }

    self.customCell.sender.text = [array objectAtIndex:indexPath.row];

    [self.customCell layoutIfNeeded];

    CGFloat height = [self.customCell.contentView systemLayoutSizeFittingSize:UILayoutFittingCompressedSize].height;

    return height +1; 
}

我的问题:当我测试应用程序时,它不会在正确的地方进行自动换行。为什么?它与UILabel类有关吗?

编辑:

谢谢,但我仍然无法工作。我没有错误,但是当我加载表视图时它不显示文本。目前,我的代码看起来像这样:

进口:

#import "ChatViewController.h"
#import "ChatTableViewCell.h"

@interface ChatViewController ()

@property (strong, nonatomic) ChatTableViewCell *customCell;

@end

下一步:

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    UILabel *gettingSizeLabel = [[UILabel alloc] init];
    gettingSizeLabel.font = [UIFont fontWithName:@"Arial" size:15];
    PFObject *tempObject = [array objectAtIndex:indexPath.row];
    gettingSizeLabel.text = [tempObject objectForKey:@"Sender"];
    gettingSizeLabel.numberOfLines = 0;

    CGSize maximumLabelSize = CGSizeMake(140, MAXFLOAT);
    CGSize expectedSize = [gettingSizeLabel sizeThatFits:maximumLabelSize];

    return expectedSize.height + (10*2);
}

我的cellForRowAtIndexPath:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifer = @"CellChat";

    ChatTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifer];

    PFObject *tempObject = [array objectAtIndex:indexPath.row];
    cell.sender.text = [tempObject objectForKey:@"Sender"];
    cell.receptor.text = [tempObject objectForKey:@"Receptor"];
    cell.sender.lineBreakMode = NSLineBreakByWordWrapping;
    cell.sender.numberOfLines = 0;

    return cell;
}

1 个答案:

答案 0 :(得分:1)

修改

请勿在{{1​​}}

中使用self.customCell

相反,计算像这样的单元格高度:

- (CGFloat)tableView:tableView heightForRowAtIndexPath:indexPath

并且不要忘记设置

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{

    UILabel *gettingSizeLabel = [[UILabel alloc] init];
    gettingSizeLabel.font = font;
    gettingSizeLabel.text = [array objectAtIndex:indexPath.row];  // your text inside [array objectAtIndex:indexPath.row];
    gettingSizeLabel.numberOfLines = 0;

    CGSize maximumLabelSize = CGSizeMake(yourMaxWidth, MAXFLOAT);

    CGSize expectedSize = [gettingSizeLabel sizeThatFits:maximumLabelSize];

    return expectedSize.height /*then add your margin 'y' margin multiplied by two for the top and bottom margin*/;
}
  

希望这对你有所帮助,编码很快..干杯! :)