類似于QQ的那種折疊效果。只刷新點擊的折疊行。不加載所有數據源。 測試環境Xcode4.3.3+SDK5.1兼容ios6

//
//  MyTableViewController.m
//  TableSectionStatistics
//

import "MyTableViewController.h"
define originalHeight 25.0f
define newHeight 85.0f
define isOpen @"85.0f"
@interface MyTableViewController ()
@end
@implementation MyTableViewController
{
    NSMutableDictionary *dicClicked;
    NSInteger count;
    CGFloat mHeight;
    NSInteger sectionIndex;
}

(id)initWithStyle:(UITableViewStyle)style
{
  self = [super initWithStyle:style];
  if (self) {

  // Custom initialization

}
  return self;
}

(void)viewDidLoad
{
  [super viewDidLoad];
  count = 0;
  mHeight = originalHeight;
  sectionIndex = 0;
  dicClicked = [NSMutableDictionary dictionaryWithCapacity:3];
}

(void)viewDidUnload
{
  [super viewDidUnload];
  // Release any retained subviews of the main view.
  // e.g. self.myOutlet = nil;
}


pragma mark - Table view data source

(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
  // Return the number of sections.
  return 50;
}

(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
  return 2;
}

(UITableViewCell )tableView:(UITableView )tableView cellForRowAtIndexPath:(NSIndexPath )indexPath
{

  static NSString contentIndentifer = @"Container";
  if (indexPath.row == 0) {

  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:contentIndentifer];
  if (cell == nil) {
      cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:contentIndentifer];
  }
  NSString *statisticsContent = [[NSString alloc] initWithString:@"rlf:歲月流芳，花開幾度，走在歲月里，醉在流香里，總在時光里輾轉徘徊。花開幾許，落花幾度，歲月寒香，飄進誰的詩行，一抹幽香，摻入幾許愁傷，流年似花，春來秋往，睜開迷離的雙眼，回首張望，隨風的塵煙蕩漾著迷忙，昨日的光陰已逝去，留下無盡的回憶讓人留戀與追憶"];
  cell.textLabel.font = [UIFont systemFontOfSize:12.0f];
  cell.textLabel.text = statisticsContent;
  cell.textLabel.textColor = [UIColor brownColor]
  ;
  cell.textLabel.opaque = NO; // 選中Opaque表示視圖后面的任何內容都不應該繪制        
  cell.textLabel.numberOfLines = 8;        
  cell.selectionStyle = UITableViewCellSelectionStyleNone;
  return cell;

}
  static NSString CellIdentifier = @"Cell";
  UITableViewCell cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
  if (cell == nil) {

  cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];

}
  cell.imageView.image = [UIImage imageNamed:@"ic_milestone_heart.png"];
  cell.textLabel.text = [NSString stringWithFormat:@"%d",count];
  count++;
  return cell;
}


//Section的標題欄高度
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
    if (section == 0)
        return 46;
    else
        return 30.0f;
}
-(UIView )tableView:(UITableView )tableView viewForHeaderInSection:(NSInteger)section
{
    CGRect headerFrame = CGRectMake(0, 0, 300, 30);
    CGFloat y = 2;
    if (section == 0) {
        headerFrame = CGRectMake(0, 0, 300, 100);
        y = 18;
    }
    UIView headerView = [[UIView alloc] initWithFrame:headerFrame];
    UILabel dateLabel=[[UILabel alloc] initWithFrame:CGRectMake(20, y, 240, 24)];//日期標簽
    dateLabel.font=[UIFont boldSystemFontOfSize:16.0f];
    dateLabel.textColor = [UIColor darkGrayColor];
    dateLabel.backgroundColor=[UIColor clearColor];
    UILabel *ageLabel=[[UILabel alloc] initWithFrame:CGRectMake(216, y, 88, 24)];//年齡標簽
    ageLabel.font=[UIFont systemFontOfSize:14.0];
    ageLabel.textAlignment=UITextAlignmentRight;
    ageLabel.textColor = [UIColor darkGrayColor];
    ageLabel.backgroundColor=[UIColor clearColor];

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"MM dd,yyyy";
dateLabel.text = [NSString stringWithFormat:@"%@",[dateFormatter stringFromDate:[NSDate date]]];
ageLabel.text = @"1歲 2天";

[headerView addSubview:dateLabel];
[headerView addSubview:ageLabel];
return headerView;

}
pragma mark - Table view delegate

(void)tableView:(UITableView )tableView didSelectRowAtIndexPath:(NSIndexPath )indexPath
{
  if (indexPath.row == 0) {   
  UITableViewCell *targetCell = [tableView cellForRowAtIndexPath:indexPath];
  if (targetCell.frame.size.height == originalHeight+1){          
      [dicClicked setObject:isOpen forKey:indexPath];
  }
  else{     
      [dicClicked removeObjectForKey:indexPath];
  }       
[self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];

  }
  NSLog(@"indexPath=%@",indexPath);
  NSLog(@"dicClicked=%@",dicClicked);
}

-(CGFloat)tableView:(UITableView )tableView heightForRowAtIndexPath:(NSIndexPath )indexPath
{
    if (indexPath.row == 0) {
        if ([[dicClicked objectForKey:indexPath] isEqualToString: isOpen]) 
            return [[dicClicked objectForKey:indexPath] floatValue];
        else
            return originalHeight;

    }
    else {
        return 45.0f;
    }
}
@end
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