0

好的，这就是我的困境，我有一段代码效果很好，它已被弃用，但它会计算任何文本块高度的适当大小。（以下作品但已弃用）

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

if (indexPath.section == 0 && indexPath.row == 2) {

   CGSize size = [[item desc] sizeWithFont:[UIFont systemFontOfSize:17] constrainedToSize:CGSizeMake(290 - (10 * 2), 200000.0f)];

    CGFloat height = MAX(size.height, 44.0f);

    return height + (2 * 2);
}
return 44;
}

试图删除不推荐使用的代码，所以我已经坚持了几天的正确方法来修复它，我想出了这个。

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.section == 0 && indexPath.row == 2) {

    NSStringDrawingContext *ctx = [NSStringDrawingContext new];
    NSAttributedString *aString = [[NSAttributedString alloc] initWithString:[item desc]];
    UITextView *calculationView = [[UITextView alloc] init];
    [calculationView setAttributedText:aString];
    CGRect textRect = [calculationView.text boundingRectWithSize:self.view.frame.size options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:calculationView.font} context:ctx];

    CGFloat height = MAX(textRect.size.height, 44.0f);
    return height + (2 * 2);

}
return 44;
}

从代码级别的角度来看，这当然行不通，但它不能适当地调整单元格的大小。我觉得这应该很容易得到任何帮助。

4

2 回答 2

1

Try this:

CGRect textRect = [calculationView.text boundingRectWithSize:CGSizeMake(290 - (10 * 2), 200000.0f) 
                        options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:calculationView.font} context:ctx];

You have not provided required size constraint as you were providing in deprecated method.. That's why you are not getting desired output..

于 2014-09-05T11:31:07.257 回答
0

只需编辑 heightForRow 方法，如：

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (indexPath.section == 0 && indexPath.row == 2)
    {
        NSStringDrawingContext *ctx = [NSStringDrawingContext new];
        NSAttributedString *aString = [[NSAttributedString alloc] initWithString:[item desc]];
        UITextView *calculationView = [[UITextView alloc] init];
        [calculationView setAttributedText:aString];
        [calculationView sizeToFit];
        //CGRect textRect = [calculationView.text boundingRectWithSize:self.view.frame.size options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:calculationView.font} context:ctx];

        CGFloat height = calculationView.frame.size.height; //MAX(textRect.size.height, 44.0f);
        NSLog(@"%.2f", calculationView.frame.size.height);
        return height + (2 * 2);
    }
    return 44;
}
于 2014-09-05T11:33:48.677 回答