动态调整UITableViewCell到UILabel的高度

I want to resize cell's height according to the label's height and label's height according to text. Or is there any way I can resize the cell's height according to the text entered in UITextView?

我想根据标签的高度来调整单元格的高度，根据文本来调整标签的高度。或者有什么方法可以根据在UITextView中输入的文本来调整单元格的高度?

2 个解决方案

#1

THIS METHOD IS DEPRECATED SINCE iOS 7.0.

自ios7.0以来，不赞成使用此方法。

There is a UITableView delegate method called heightForRowAtIndexPath that is called before you create a cell or a table.

有一个名为heightForRowAtIndexPath的UITableView委托方法，在创建单元格或表之前调用它。

You could use the NSIndexPath passed to it to get the text at a specific row and use the sizeWithFont method from UIStringDrawing.h to compute a CGSize for that row.

您可以使用传递给它的NSIndexPath来获取特定行的文本，并使用uistringdraw的sizeWithFont方法。h来计算这一行的CGSize。

For example:

例如:

CGSize size = [text sizeWithFont:font
                   constrainedToSize:maximumLabelSize
                   lineBreakMode:UILineBreakModeWordWrap];

And finally you would return size.height.

最后返回size。height。

#2

--For iOS7--

——为iOS7

Basing this off of Josh Vera's answer … place this in heightForRowAtIndexPath.

根据Josh Vera的回答，把这个放在heightForRowAtIndexPath中。

I have my table data stored in an NSArray *tableData.

我的表数据存储在NSArray *tableData中。

// set the desired width of the textbox that will be holding the adjusted text, (for clarity only, set as property or ivar)
CGFloat widthOfMyTexbox = 250.0;

-(float)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    //Get a reference to your string to base the cell size on.
    NSString *cellText = [self.tableData objectAtIndex:indexPath.row];
    //set the desired size of your textbox
    CGSize constraint = CGSizeMake(widthOfMyTextBox, MAXFLOAT);
    //set your text attribute dictionary
    NSDictionary *attributes = [NSDictionary dictionaryWithObject:[UIFont systemFontOfSize:14.0] forKey:NSFontAttributeName];
    //get the size of the text box
    CGRect textsize = [cellText boundingRectWithSize:constraint options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil];
    //calculate your size
    float textHeight = textsize.size.height +20;
    //I have mine set for a minimum size
    textHeight = (textHeight < 50.0) ? 50.0 : textHeight;

    return textHeight;
}

I haven't tested it for iOS<7, but I believe it should work for that as well.

我还没有对iOS<7进行测试，但我认为它也应该适用。

#1