获取UILabel下最后一个字符串的位置。获取文字长度和高度，自动换行

获取UILabel上最后一个字符串的位置。获取文字长度和高度，自动换行
??? cell.myLabel.lineBreakMode = UILineBreakModeWordWrap;
??? cell.myLabel.numberOfLines = 0;
??? [cell.myLabel setFont:[UIFont fontWithName:@"Arial" size:15]];
??? cell.myLabel.frame = CGRectMake(0, 0, labelSize.width, labelSize.height);
???

??? return labelSize.height+30;
???
}
//显示每行的内容。
- (NewNotificationCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
??? static NSString *CellIdentifier = @"Cell";
??? NewNotificationCell*cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
??? if (!cell) {
??????? cell=[[[NewNotificationCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]autorelease];
??????? cell = [[[NSBundle mainBundle]loadNibNamed:@"NewNotificationCell" owner:self options:nil]objectAtIndex:0];
???????
??? }
??? //自动换行。
??? cell.myLabel.text = [self.dataArray objectAtIndex:indexPath.row];
??? labelSize = [cell.myLabel.text sizeWithFont:[UIFont fontWithName:@"Arial" size:15] constrainedToSize:CGSizeMake(cell.myLabel.frame.size.width, 1000) lineBreakMode:UILineBreakModeWordWrap];
??? cell.myLabel.lineBreakMode = UILineBreakModeWordWrap;
??? cell.myLabel.numberOfLines = 0;
??? [cell.myLabel setFont:[UIFont fontWithName:@"Arial" size:15]];
??? cell.myLabel.frame = CGRectMake(0, 0, labelSize.width, labelSize.height);
???
??? //获取文字长度和高度。
??? CGSize fontSize =[cell.myLabel.text sizeWithFont:cell.myLabel.font
??????????????????????????????????? forWidth:cell.myLabel.frame.size.width
?????????????????????????????? lineBreakMode:UILineBreakModeWordWrap];
??? NSLog(@"文字长度=%f",fontSize.width);
???
??? //获取UILabel上最后一个字符串的位置。
??? CGPoint lastPoint;
??? CGSize sz = [cell.myLabel.text sizeWithFont:cell.myLabel.font constrainedToSize:CGSizeMake(MAXFLOAT, 40)];
???
??? CGSize linesSz = [cell.myLabel.text sizeWithFont:cell.myLabel.font constrainedToSize:CGSizeMake(cell.myLabel.frame.size.width, MAXFLOAT) lineBreakMode:UILineBreakModeWordWrap];
??? if(sz.width <= linesSz.width) //判断是否折行?
??? {?
??????? lastPoint = CGPointMake(cell.myLabel.frame.origin.x + sz.width, cell.myLabel.frame.origin.y);???
??? }
??? else
??? {
??????? lastPoint = CGPointMake(cell.myLabel.frame.origin.x + (int)sz.width % (int)linesSz.width,linesSz.height - sz.height);
??? }
??? NSLog(@"====%f",lastPoint.x);
???
???
??? [cell.myButton setTitle:@"查看" forState:UIControlStateNormal];
??? [cell.myButton setBackgroundImage:[UIImage imageNamed:@"button.png"] forState:UIControlStateNormal];
??? if ([cell.myButton.titleLabel.text isEqualToString:@"查看"]) {
??????? cell.myButton.frame = CGRectMake(lastPoint.x+5, labelSize.height-19, 30, 20);
??? }
??? [cell.timeButton setTitle:@"今天" forState:UIControlStateNormal];
??? cell.timeButton.frame = CGRectMake(260, labelSize.height+8, 50, 20);
??? return cell;
}