动态调整UITableViewCell高度的实现方法

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
 
    static NSString *CellIdentifier = @"Cell";
 
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
		UILabel *label = [[UILabel alloc] initWithFrame:CGRectZero];
		label.tag = 1;
		label.lineBreakMode = UILineBreakModeWordWrap;
		label.highlightedTextColor = [UIColor whiteColor];
		label.numberOfLines = 0;
		label.opaque = NO; // 选中Opaque表示视图后面的任何内容都不应该绘制
		label.backgroundColor = [UIColor clearColor];
		[cell.contentView addSubview:label];
		[label release];
    }
 
    UILabel *label = (UILabel *)[cell viewWithTag:1];
	NSString *text;
	text = [textArray objectAtIndex:indexPath.row];
    CGRect cellFrame = [cell frame];
	cellFrame.origin = CGPointMake(0, 0);
 
	label.text = text;
	CGRect rect = CGRectInset(cellFrame, 2, 2);
	label.frame = rect;
	[label sizeToFit];
	if (label.frame.size.height > 46) {
		cellFrame.size.height = 50 + label.frame.size.height - 46;
	}
	else {
		cellFrame.size.height = 50;
	}
	[cell setFrame:cellFrame];
 
    return cell;
}
 
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
	UITableViewCell *cell = [self tableView:tableView cellForRowAtIndexPath:indexPath];
        //UITableViewCell *cell = [self cellForRowAtIndexPath:indexPath];
	return cell.frame.size.height;
}

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